Printed circuit board, server, wiring compensation method, apparatus, device, and medium

Abstract

The application discloses a printed circuit board, a server, a wiring compensation method and device, equipment and a medium, and relates to the technical field of circuit boards. The printed circuit board is provided with at least two signal transmission lines. The signal transmission line comprises a plurality of transmission line segments connected in sequence. Different transmission line segments of the same signal transmission line have different unit length transmission delays. Transmission line segments of different signal transmission lines are oppositely arranged and the unit length transmission delays of the opposite transmission line segments are the same. Any two opposite transmission line segments are a to-be-adjusted transmission line segment and a target transmission line segment. The to-be-adjusted transmission line segment further comprises a plurality of compensation line segments. The compensation line segments are inserted between parallel segments of the to-be-adjusted transmission line segment, so that the lengths of any two opposite transmission line segments are the same. The application ensures the consistency of signal transmission delay of the two signal transmission lines. The signals transmitted by the two signal transmission lines arrive at the same time, thereby greatly improving the signal integrity design quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit design, and in particular, relates to a printed circuit board, a server, a wiring compensation method and device, equipment and a medium. BACKGROUND

[0002] With the progress of semiconductor technology and the growth of application demand, signal rates are getting faster and faster, thereby bringing higher and higher requirements for signal integrity design. Existing high-speed signals are transmitted in differential form. In designing high-speed signal transmission lines, in the related art, the total lengths of two signal transmission lines are controlled to be equal to ensure that the signals transmitted by the two signal transmission lines reach the receiving end at the same time from the sending end, thereby avoiding sampling errors caused by timing offset. Existing designs often only focus on overall equal-length design, considering that as long as the overall lengths of the two signal transmission lines are equal, the time delays can be consistent, but it ignores the fact that the unit length transmission time delays of the signal transmission lines are inconsistent in different regions of the circuit board, so although the wiring is equal in length, it cannot guarantee that the two differential signals arrive at the receiving end at the same time, which may cause high bit error rate, increased common mode noise, eye diagram collapse and other signal integrity problems. SUMMARY

[0003] The present application provides a printed circuit board, a server, a wiring compensation method, a device, equipment and a medium to at least solve the technical problem that two differential signals cannot arrive at the same time in the related art.

[0004] The present application provides a printed circuit board, and the printed circuit board is provided with at least two signal transmission lines;

[0005] The signal transmission lines include a plurality of transmission line segments connected in sequence, different transmission line segments of the same signal transmission line have different unit length transmission time delays, and the transmission line segments of different signal transmission lines are arranged oppositely and have the same unit length transmission time delay.

[0006] Any two oppositely arranged transmission line segments are a to-be-adjusted transmission line segment and a target transmission line segment, and the to-be-adjusted transmission line segment and the target transmission line segment each include a parallel segment, the length of the parallel segment of the to-be-adjusted transmission line segment is smaller than the length of the parallel segment of the target transmission line segment, and the to-be-adjusted transmission line segment further includes a plurality of compensation line segments, which are inserted between the parallel segments of the to-be-adjusted transmission line segment, so that the lengths of any two oppositely arranged transmission line segments are the same.

[0007] The present application further provides a server including any of the above printed circuit boards.

[0008] The present application further provides a wiring compensation design method applied to the design of any of the above printed circuit boards, and the method includes:

[0009] The signal transmission line is divided into a plurality of transmission line segments connected in sequence according to preset time delay characteristics of the signal transmission line in different areas of the printed circuit board, wherein different transmission line segments of the same signal transmission line have different unit length transmission time delays, and the transmission line segments of different signal transmission lines are arranged oppositely and have the same unit length transmission time delay.

[0010] The two opposite transmission line segments are routed and compensated to make the lengths of any two opposite transmission line segments equal.

[0011] The application further provides a routing compensation design device applied to the design of the printed circuit board, and the device comprises:

[0012] A transmission line segmenting module is configured to divide the signal transmission line into a plurality of transmission line segments connected in sequence according to preset time delay characteristics of the signal transmission line in different areas of the printed circuit board, wherein different transmission line segments of the same signal transmission line have different unit length transmission time delays, and the transmission line segments of different signal transmission lines are arranged oppositely and have the same unit length transmission time delay.

[0013] A segment compensation module is configured to route and compensate the two opposite transmission line segments to make the lengths of any two opposite transmission line segments equal.

[0014] The application further provides an electronic device comprising:

[0015] A memory is configured to store a computer program.

[0016] A processor is configured to execute the computer program to implement the steps of the routing compensation design method.

[0017] The application further provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the routing compensation design method.

[0018] The application further provides a computer program product comprising computer instructions for causing a computer to execute the steps of the routing compensation design method.

[0019] In the application, the transmission line segments with different unit length transmission time delays in the two signal transmission lines are arranged to have the same length, the signal transmission line is designed to have the same length in different areas, the transmission signal delays of the two signal transmission lines are ensured to be consistent, the signals transmitted by the two signal transmission lines arrive at the same time, and thus the signal integrity design quality can be greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0021] Figure 1 A design schematic diagram of a differential signal line in the related art;

[0022] Figure 2 A structure schematic diagram of a connection part of a differential signal line in the related art;

[0023] Figure 3 A structure schematic diagram of a printed circuit board in an embodiment of the present application;

[0024] Figure 4 A structure schematic diagram of another printed circuit board in an embodiment of the present application;

[0025] Figure 5 A structure schematic diagram of still another printed circuit board in an embodiment of the present application;

[0026] Figure 6 A structure schematic diagram of a trapezoidal structure compensation line segment in an embodiment of the present application;

[0027] Figure 7 A structure schematic diagram of a straight line chamfer compensation line segment in an embodiment of the present application;

[0028] Figure 8 A structure schematic diagram of a circular arc chamfer compensation line segment in an embodiment of the present application;

[0029] Figure 9 A structure schematic diagram of a circular arc structure compensation line segment in an embodiment of the present application;

[0030] Figure 10 A structure schematic diagram of a wedge structure compensation line segment in an embodiment of the present application;

[0031] Figure 11 A structure schematic diagram of a connection part of a signal transmission line in an embodiment of the present application;

[0032] Figure 12 A flow chart of a wiring compensation design method in an embodiment of the present application;

[0033] Figure 13 A structure schematic diagram of a wiring compensation design device in an embodiment of the present application;

[0034] Figure 14 A structure schematic diagram of an electronic device in an embodiment of the present application.

[0035] Reference Signs List:

[0036] 1. first transmission line segment; 2. second transmission line segment; 3. compensation line segment; 4. third transmission line segment; 5. first electronic element; 6. second electronic element; 7. fourth transmission line segment; 8. fifth transmission line segment; 9. gradual change line segment; 31. first connecting line segment; 32. intermediate line segment; 33. second connecting line segment; 311. first chamfered line segment; 312. first main body line segment; 313. second chamfered line segment; 331. third chamfered line segment; 332. second main body line segment; 333. fourth chamfered line segment. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0038] It should be noted that the terms "length", "width", "upper", "lower", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "mounting", "connecting", and "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. The terms "parallel", "perpendicular", and "equal" include the described cases and the approximate cases similar to the described cases, and the approximate cases are within an acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art considering the measurement being discussed and the error related to the measurement of a specific quantity (i.e. the limitation of the measurement system). For example, "parallel" includes absolute parallel and approximate parallel, wherein the acceptable deviation range of approximate parallel can be, for example, within 5°; "perpendicular" includes absolute perpendicular and approximate perpendicular, wherein the acceptable deviation range of approximate perpendicular can also be, for example, within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality is, for example, that the difference between the two equalities is less than or equal to 5% of either. For a person of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0039] In order for those skilled in the art of the present technology to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] At present, high-speed signals are transmitted in the form of differential signals. A differential signal is a communication mode that transmits the same signal through two phase-opposed signal transmission lines, i.e., differential signal line P and differential signal line N. The sending end generates a pair of signals with equal size and opposite polarity, which are respectively referred to as the positive and negative poles of the differential signal line. The differential signal line has strong anti-interference ability, low electromagnetic radiation, low radiation energy, low voltage swing and high energy efficiency, precise timing control, and resistance to power supply and ground noise. When designing a differential signal line, the differential signal line P and the differential signal line N must be strictly equal in length, otherwise phase shift will occur, which will increase signal jitter and can convert common-mode noise into differential-mode noise.

[0041] To control the equal timing of two differential signals from the sending end to the receiving end, the existing scheme is to control the equal length of the differential signal line P and the differential signal line N. Generally, based on the Cadence routing software, a constraint rule is set, and the constraint condition of the constraint rule can only be set as the equal length of the total length, that is, the total length of the differential signal line P from the sending end to the receiving end and the differential signal line N from the sending end to the receiving end is equal.

[0042] Figure 1 The structure of the differential signal line in the related art is shown in the figure. The sending end of the differential signal line is chip A, and the receiving end of the differential signal line is chip B. The ball grid array (BGA) region of chip A is relatively narrow, which is designed with a line width of 3.5 mil and a line spacing of 4 mil, and then routed with a normal design line width and line spacing. The normal design routing is designed with a line width of 5.0 mil and a line spacing of 6 mil. The connection between the thick line of the normal region and the 3.5 mil thin line is connected by a 3.5 mil thin line. Then the thick line of the normal line width passes through a via connecting two circuit board layers to connect another circuit board layer, which is a normal line width and connected to chip B. A number of 3W2S bumps are wound between the via and chip B to control the equal length of the differential signal line P and the differential signal line N within 5 mil.

[0043] Among them, the 3W2S bump means that the straight line protruding upward (i.e., the part parallel to the differential signal line P or differential signal line N) has a length of three times the line width W of the corresponding trace, which is 3W, and the distance from the differential signal line N is twice the spacing S between the differential signal line P and the differential signal line N, which is 2S. The trace of the bump is inclined upward by 45°. The compensation value of the 3W2S compensation method inserted into the bump is a fixed value, so it is difficult to achieve complete equal length, and there is an equal length compensation error.

[0044] AsFigure 2 As shown in the related art, at the connection between the 3.5 mil thin line and the thick line with normal line width, the line width of the used trace is 3.5 mil, and there is a certain spare area at the connection with the normal line width, and there is an impedance discontinuity problem at this position.

[0045] Therefore, in the related art, at least the following disadvantages exist:

[0046] The final purpose of the equal length of the differential signal line P and the differential signal line N is to make the signals arrive at the receiving end at the same time, that is, isochronous. However, in the actual software operation process, it is not easy to operate isochronous, so it is transformed into equal length to control isochronous. The existing design and the existing software rule setting method only consider the overall equal length of the differential signal line P and the differential signal line N, ignore the difference of the unit transmission delay of the line segments in different regions, and do not consider the real design requirement, that is, the isochronous arrival of the PN signal. Although the equal length of the wiring is realized, the time delay of the PN signal still has a difference. For example, the transmission delays of the line segments on different layers are different when the 3.5 mil thin line and the thick line with normal line width are connected. The simple overall equal length design of the trace will lead to high bit error rate, increased common mode noise, collapsed eye diagram and other signal integrity problems.

[0047] When the 3W2S design method is used, since the length of each bump is pre-set and fixed under this design system, this feature makes it difficult to make the differential signal line P and the differential signal line N reach the ideal state of complete equal length in the wiring process. Even if appropriate compensation measures are taken, there is still a certain difference in the lengths of the two differential signal lines after compensation. For example, the current equal length control requirement of the differential signal is 5 mil, that is, the length difference between the differential signal line P and the differential signal line N should not exceed 5 mil. This will also cause the time delay between the differential signals to increase, which may cause signal integrity problems.

[0048] In addition, the connection between the 3.5 mil thin line width and the normal line width in the related design cannot be well matched, which causes impedance discontinuity and affects the signal quality of the high-speed signal.

[0049] In order to solve at least one of the disadvantages in the above-mentioned technology, embodiments of the present application provide a printed circuit board, as shown in Figure 3 As shown, the printed circuit board is provided with at least two signal transmission lines.

[0050] Among them, the signal transmission lines are generally arranged in pairs, for example, the signal transmission lines are provided with two, four or six, etc., and each two signal transmission lines are arranged in pairs and have a fixed distance. Exemplarily, the signal transmission lines are provided with two, and the two signal transmission lines transmit high-speed signals between the receiving end and the sending end.

[0051] The signal transmission line comprises a plurality of transmission line segments connected in sequence, different transmission line segments of the same signal transmission line have different unit length transmission delays, and the transmission line segments of different signal transmission lines are oppositely arranged and have the same unit length transmission delay.

[0052] In some embodiments, as shown in Figure 3 The transmission line segment of the signal transmission line comprises a first transmission line segment 1 and a second transmission line segment 2 connected to each other, and the line width of the first transmission line segment 1 is different from that of the second transmission line segment 2.

[0053] Specifically, the first transmission line segments 1 of the two signal transmission lines are oppositely arranged and located in the same region, and the second transmission line segments 2 of the two signal transmission lines are oppositely arranged and located in the same region.

[0054] In the printed circuit board, the unit length transmission delay of a signal is related to the equivalent dielectric constant, and the line width of different traces affects the equivalent dielectric constant of the traces. Therefore, different line widths of the traces have different unit length transmission delays, that is, two different traces, even if the lengths are the same, but due to the different line widths, the signal transmission delays are different.

[0055] The first transmission line segment 1 and the second transmission line segment 2 are located in different regions of the same layer of the printed circuit board and have different line widths due to their respective trace limitations. For example, the first transmission line segment 1 is located in the BGA region of the chip or other regions with limited wiring space, and requires a smaller line width and line spacing, such as a line width of 3.5 mil and a line spacing of 4 mil, and the second transmission line segment 2 is located in a normal trace region of the printed circuit board, with a line width of 5.0 mil and a line spacing of 6 mil. Due to the different line widths, the first transmission line segment 1 and the second transmission line segment 2 have different unit length transmission delays, and need to be processed separately for the same length.

[0056] Further, as shown in Figure 4 The printed circuit board comprises a first wiring layer and a second wiring layer, the first transmission line segment 1 and the second transmission line segment 2 are arranged on the first wiring layer, and the transmission line segment of the signal transmission line further comprises a third transmission line segment 4 arranged on the second wiring layer, and the third transmission line segment 4 and the second transmission line segment 2 are connected through a via hole connecting the first wiring layer and the second wiring layer.

[0057] Specifically, the third transmission line segments 4 of the two signal transmission lines are oppositely arranged, and the line widths of the second transmission line segment 2 and the third transmission line segment 4 can be the same or different.

[0058] In the manufacturing of printed circuit boards, the use of multiple wiring layers increases the wiring space, facilitating the design of complex signal transmission lines. By connecting transmission line segments on different wiring layers through vias, the signal transmission path can be flexibly adjusted to meet different circuit layout and signal transmission requirements. The vias are equipped with conductors such as copper, ensuring smooth current flow through the vias and efficient signal transmission between different wiring layers.

[0059] In the printed circuit board, the equivalent dielectric constant of the transmission line is a key determinant of signal propagation speed, which is influenced by multiple factors such as material properties, physical structure, manufacturing process, and operating frequency. Different layers of the printed circuit board have different corresponding structures, and different structures correspond to different prepregs, resulting in different equivalent dielectric constants. Even with the same structure, the type of prepreg used may differ due to differences in the copper content of the actual printed circuit board, leading to differences in dielectric constant. Additionally, different layers may use different types of copper foil, and different manufacturers may have different manufacturing processes, which can also affect the dielectric constant value. Therefore, the second transmission line segment 2 and the third transmission line segment 4 of different wiring layers are treated as equal in length, even if the line widths are the same, due to differences in material, structure, and other factors in the wiring layers.

[0060] In some embodiments, as shown in Figure 5 The printed circuit board includes a first wiring layer and a second wiring layer, and the transmission line segments of the signal transmission line include a fourth transmission line segment 7 and a fifth transmission line segment 8 connected to each other. The fourth transmission line segment 7 is disposed on the first wiring layer, and the fifth transmission line segment 8 is disposed on the second wiring layer. The fourth transmission line segment 7 and the fifth transmission line segment 8 are connected through a via that connects the first wiring layer and the second wiring layer.

[0061] Specifically, the line widths of the fourth transmission line segment 7 and the fifth transmission line segment 8 can be the same or different. When there is no special requirement for the width of the wiring in the first wiring layer and the second wiring layer, the line width of the fourth transmission line segment 7 and the fifth transmission line segment 8 is 5.0 mil, and the line spacing is 6.0 mil. At this time, the signal transmission line only needs to be divided into two types of transmission line segments, the fourth transmission line segment 7 and the fifth transmission line segment 8, and the fourth transmission line segment 7 and the fifth transmission line segment 8 are designed to be equal in length.

[0062] It should be understood that the division of the signal transmission line can be set according to actual conditions. For example, when there are several layers of wiring, several types of transmission line segments need to be correspondingly divided. When there are several lines of different thicknesses in the same wiring layer, they also need to be correspondingly divided into several types of transmission line segments.

[0063] The two transmission line segments are a to-be-adjusted transmission line segment and a target transmission line segment, and the to-be-adjusted transmission line segment and the target transmission line segment each include a parallel segment, the length of the parallel segment of the to-be-adjusted transmission line segment is less than the length of the parallel segment of the target transmission line segment, and the to-be-adjusted transmission line segment further includes a plurality of compensation line segments 3, which are inserted between the parallel segments of the to-be-adjusted transmission line segment, so that the lengths of the two transmission line segments are the same.

[0064] Specifically, the two transmission line segments are each pair of transmission line segments in the signal transmission line, for example, the two first transmission line segments 1 in the signal transmission line are the two transmission line segments.

[0065] Taking the structure of the two first transmission line segments 1 as an example, the two first transmission line segments 1 are located in the BGA region of the chip, and due to space limitations, thin lines with a line width of 3.5 mil and a line spacing of 4 mil are required. Since the starting positions of the two signal transmission lines, i.e., the two first transmission line segments 1, in the BGA region are not on the same longitudinal axis, there is a difference in the lengths of the two first transmission line segments 1 in the BGA region. Therefore, the routing of the shorter transmission line segment in the 3.5 mil line width needs to be compensated. One of the two first signal transmission line segments, whose starting position is far from the end position, is taken as the target transmission line segment, and the other is taken as the to-be-adjusted transmission line segment.

[0066] The to-be-adjusted transmission line segment and the target transmission line segment each include a parallel segment, the line spacing of the parallel segment of the to-be-adjusted transmission line segment is equal to that of the target transmission line segment, and the length of the parallel segment of the target transmission line segment is greater than that of the to-be-adjusted transmission line segment because the starting position of the target transmission line segment is far from the end position.

[0067] The parallel segment is a relatively parallel segment part of the to-be-adjusted transmission line segment and the target transmission line segment. For the target transmission line segment, since no compensation line segment 3 needs to be inserted, the entire target transmission line segment can be taken as a parallel segment. For the to-be-adjusted transmission line segment, when a compensation line segment 3 is inserted, the to-be-adjusted transmission line segment is divided into two parallel segments and the compensation line segment 3 connected between the two parallel segments.

[0068] The shape of the compensation line segment 3 is a convex bulge, and the shape of the convex bulge includes a trapezoidal shape, a triangular shape, a rectangular shape, a semicircular shape, etc. The length of the to-be-adjusted transmission line segment is increased by the winding setting of the convex bulge. When designing the to-be-adjusted transmission line segment, the number of inserted compensation line segments 3 is first determined, and then a corresponding number of compensation line segments 3 are added in the design process of the to-be-adjusted transmission line segment. Each compensation line segment 3 can be spaced or continuous. When spaced, the intervals can be equal or unequal.

[0069] After inserting compensation segment 3, the transmission line segment to be adjusted includes several parallel segments and compensation segment 3 connected in sequence. Each time a compensation segment 3 is inserted, the parallel segment is correspondingly divided into two parts. Figure 3 , Figure 4 and Figure 5 In the examples, only one compensation segment 3 is inserted. In specific applications, the number of compensation segments 3 can be increased according to the actual situation.

[0070] For the other two opposing transmission lines, such as the second transmission line 2 or the third transmission line 4, their structure and design method are the same as the first transmission line 1, so that the two signal transmission lines are set to be of equal length in the second transmission line 2 and the third transmission line 4.

[0071] In related technologies, the signal transmission line adopts an overall equal-length structure, and the compensation segment 3 is randomly distributed on one of the shorter signal transmission lines. This cannot guarantee that the transmission segments with different unit length transmission delays are of equal length, resulting in inconsistent signal delays.

[0072] The printed circuit board of this invention compensates for the different line widths and wiring layers of the signal transmission lines by winding them separately. This ensures that the transmission line segments with different unit length transmission delays are of equal length, guaranteeing the consistency of the signal transmission delays of the two signal transmission lines. The signals transmitted by the two signal transmission lines arrive simultaneously, theoretically achieving completely equal delays for the two signals. This eliminates timing offsets, avoids inter-symbol interference caused by phase offsets, increases eye diagram width, reduces bit error rate, and greatly improves the signal integrity design quality.

[0073] Furthermore, theoretically, since the delays of the two signals are exactly equal, their common-mode signal is zero, which can enhance the common-mode noise suppression capability, improve the signal anti-interference capability, and reduce electromagnetic interference (EMI) radiation.

[0074] In some embodiments, the shape parameters of the compensation segment 3 satisfy preset constraints so that the length of the transmission segment to be adjusted after inserting the compensation segment 3 is equal to the length of the target transmission segment, and the number of inserted compensation segments 3 is minimized.

[0075] Specifically, compensation segment 3 includes several line segments connected in sequence, including but not limited to straight lines, curves, and broken lines.

[0076] The preset constraints are used to constrain the relationship between the length difference between the transmission line segment to be adjusted and the target transmission line segment and the shape parameters of the compensation line segment 3 when the compensation line segment 3 is not inserted. The length constraints or angle constraints of each line segment can also be further set.

[0077] The shape parameters of the compensation line segment 3 include the length of the line segment constituting the compensation line segment 3, the inclination angle, the overall height of the compensation line segment 3, and the like. At least one of the shape parameters of the compensation line segment 3 can be dynamically set according to a preset constraint condition, so that different compensation values are obtained after the compensation line segment 3 is inserted, and the minimum value of the number of the inserted compensation line segments 3 under the equal length condition is obtained, thereby realizing that the length of the to-be-adjusted transmission line segment and the length of the target transmission line segment are completely equal in length, and the number of the inserted compensation line segments 3 is minimized, and the signal transmission quality is better.

[0078] In some embodiments, as shown in Figure 6 The compensation line segment 3 includes a first connecting line segment 31, an intermediate line segment 32, and a second connecting line segment 33 connected in sequence. The two ends of the first connecting line segment 31 are respectively connected to one end of the intermediate line segment 32 and a parallel segment on one side of the compensation line segment 3. The two ends of the second connecting line segment 33 are respectively connected to the other end of the intermediate line segment 32 and a parallel segment on the other side of the compensation line segment 3. The intermediate line segment 32 is parallel to the parallel segment of the target transmission line segment. The first connecting line segment 31 and the second connecting line segment 33 are symmetrically arranged with respect to the central axis of the intermediate line segment 32. The height of the intermediate line segment 32 and the inclination angle of the first connecting line segment 31 satisfy a preset constraint condition, so that the length of the to-be-adjusted transmission line segment and the length of the target transmission line segment are equal after the compensation line segment 3 is inserted, and the value of the number of the inserted compensation line segments 3 is minimized. The shape parameters of the compensation line segment 3 include the height of the intermediate line segment 32 and the inclination angle of the first connecting line segment 31.

[0079] Specifically, the height of the intermediate line segment 32 is the distance between the intermediate line segment 32 and the to-be-adjusted transmission line segment.

[0080] The preset constraint condition is a constraint condition of the height of the intermediate line segment 32 and the inclination angle of the first connecting line segment 31 according to the design requirements of the compensation line segment 3. By setting the preset constraint condition, the length of the to-be-adjusted transmission line segment and the length of the target transmission line segment can be completely equal in length.

[0081] The preset constraint condition determines the relationship between the height of the intermediate line segment 32, the inclination angle of the first connecting line segment 31, and the length difference value. The length difference value is the length difference between the to-be-adjusted transmission line segment and the target transmission line segment when the compensation line segment 3 is not inserted. The length difference value is obtained by comparing the lengths of two opposite transmission line segments after each transmission line segment is designed according to the basic wiring rules, such as line spacing and line width requirements.

[0082] In the embodiment of the present application, the parallel segment of the intermediate line segment 32 and the target transmission line segment are parallel, and the first connection line segment 31 and the second connection line segment 33 are symmetrically arranged relative to the central axis of the intermediate line segment 32, that is, the inclination angle of the second connection line segment 33 is the same as the inclination angle of the first connection line segment 31, so that the compensated length is only related to the height of the intermediate line segment 32 and the inclination angle of the first connection line segment 31. By determining the height of the intermediate line segment 32 and the inclination angle of the first connection line segment 31 under the premise of meeting the preset constraint condition, different compensation values can be obtained, and the minimum number of inserted compensation line segments 3 under the equal length condition can be obtained, so that the length of the to-be-adjusted transmission line segment and the length of the target transmission line segment are completely equal in length, and the number of inserted compensation line segments 3 is minimized, and the signal transmission quality is better.

[0083] In some embodiments, the first connection line segment 31 and the second connection line segment 33 are both inclined towards the direction close to the intermediate line segment 32. For example, the to-be-compensated transmission line segment is located above the target transmission line segment, and the compensation line segment 3 protrudes upwards, that is, the first connection line segment 31 and the second connection line segment 33 are both inclined upwards towards the direction close to the intermediate line segment 32. At this time, the shape of the compensation line segment 3 is trapezoidal.

[0084] When the shape of the compensation line segment 3 is trapezoidal, the preset constraint condition includes:

[0085]

[0086] In the formula, N represents the number of inserted compensation line segments 3, L1 represents the length of the first connection line segment 31, represents the inclination angle of the first connection line segment 31, and respectively represent the lower boundary of the preset angle and the upper boundary of the preset angle, represents the height constraint constant, represents the length difference between the to-be-adjusted transmission line segment and the target transmission line segment when the compensation line segment 3 is not inserted, represents the height of the intermediate line segment 32, represents the line distance of the to-be-adjusted transmission line segment and the target transmission line segment.

[0087] Specifically, the height of the intermediate line segment 32 and the inclination angle of the first connection line segment 31 in the inserted compensation line segment 3 need to meet the preset constraint condition, the size and shape of the compensation line segment 3 are determined through the preset constraint condition, and the length of the to-be-adjusted transmission line segment and the target transmission line segment is equal after the compensation line segment 3 is inserted.

[0088] By determining the height of the intermediate line segment 32 and the inclination angle of the first connection line segment 31 based on the preset constraint condition, and screening the height of the intermediate line segment 32 and the inclination angle of the first connection line segment 31 corresponding to the minimum insertion quantity under the premise of meeting the preset constraint condition to determine the size and shape of the inserted compensation line segment 3, the length of the to-be-adjusted transmission line segment and the length of the target transmission line segment can be completely equal, and the number of the inserted compensation line segment 3 is minimized, and the signal transmission quality is better.

[0089] For any two opposite transmission line segments, the line width of the to-be-adjusted transmission line segment is the same as the line width of the target transmission line segment, for example, the line width of both is 3.5 mil.

[0090] The value range of the preset lower boundary of the inclination angle of the first connection line segment 31 is 38° to 42°, the value range of the preset upper boundary of the inclination angle of the first connection line segment 31 is 48° to 52°, and the value range of the height constraint constant is 0.8 to 1.2.

[0091] For example, the preset lower boundary of the inclination angle of the first connection line segment 31 is equal to 38°, the preset upper boundary of the inclination angle of the first connection line segment 31 is equal to 48°, and the height constraint constant is equal to 0.8; or, the preset lower boundary of the inclination angle of the first connection line segment 31 is equal to 42°, the preset upper boundary of the inclination angle of the first connection line segment 31 is equal to 52°, and the height constraint constant is equal to 1.2; or, the preset lower boundary of the inclination angle of the first connection line segment 31 is equal to 40°, the preset upper boundary of the inclination angle of the first connection line segment 31 is equal to 50°, and the height constraint constant is equal to 1.

[0092] Setting the inclination angle of the first connection line segment 31 too large will affect the signal transmission quality, and setting the height constraint constant too large will increase the wiring space. By further limiting the value range of the inclination angle of the first connection line segment 31 and the height constraint constant, the design of the compensation line segment 3 is more operable and accurate. The performance of the compensation line segment 3 for transmitting signals is stable within the range, and the signal transmission delay difference is effectively compensated.

[0093] Further, the value range of the length of the intermediate line segment 32 is 2 to 4 , times the line width of the to-be-adjusted transmission line segment.

[0094] For example, the length of the intermediate line segment 32 is 2 , 3 , or 4 , etc. The length of the intermediate line segment 32 is designed within the range according to the corresponding line width setting, which can ensure the overall coordination of the compensation line segment 3 and the signal transmission line and avoid signal quality degradation caused by excessive length or shortness.

[0095] In some embodiments, as shown in Figure 7 , the first connecting line segment 31 includes a first chamfer line segment 311, a first main body line segment 312, and a second chamfer line segment 313 connected in sequence, the second connecting line segment 33 includes a third chamfer line segment 331, a second main body line segment 332, and a fourth chamfer line segment 333 connected in sequence, the two ends of the first chamfer line segment 311 are connected to one end of the intermediate line segment 32 and the parallel segment on one side of the compensation line segment 3, respectively, the two ends of the fourth chamfer line segment 333 are connected to the other end of the intermediate line segment 32 and the parallel segment on the other side of the compensation line segment 3, respectively, the parallel segment of the intermediate line segment 32 and the target transmission line segment are parallel, the first main body line segment 312 and the second main body line segment 332 are both perpendicular to the parallel segment of the target transmission line segment, and the first connecting line segment 31 and the second connecting line segment 33 are symmetrically arranged with respect to the central axis of the intermediate line segment 32.

[0096] By connecting each line segment through the first chamfer line segment 311, the second chamfer line segment 313, the third chamfer line segment 331, and the fourth chamfer line segment 333, the included angle between the connected line segments can be avoided to be small, and the connection of the line segments is not smooth, thereby improving the signal transmission quality.

[0097] In some embodiments, the first chamfer line segment 311, the first main body line segment 312, the second chamfer line segment 313, the intermediate line segment 32, the third chamfer line segment 331, the second main body line segment 332, and the fourth chamfer line segment 333 are all straight line segments. Correspondingly, the preset constraint condition includes:

[0098]

[0099] In the formula, represents the number of inserted compensation line segments 3, represents the length difference between the to-be-adjusted transmission line segment and the target transmission line segment when the compensation line segment 3 is not inserted, represents the height of the intermediate line segment 32, represents the line spacing of the to-be-adjusted transmission line segment and the target transmission line segment, and respectively represent the lower boundary and the upper boundary of the preset angle, represents a height constraint constant, represents the inclination angle of the first chamfer line segment 311, denotes the inclination angle of the second chamfered line segment 313, denotes the inclination angle of the third chamfered line segment 331, denotes the inclination angle of the fourth chamfered line segment 333, denotes the length of the projection of the first chamfered line segment 311 in the direction perpendicular to the intermediate line segment 32, denotes the length of the projection of the second chamfered line segment 313 in the direction perpendicular to the intermediate line segment 32, denotes the length of the projection of the third chamfered line segment 331 in the direction perpendicular to the intermediate line segment 32, denotes the length of the projection of the fourth chamfered line segment 333 in the direction perpendicular to the intermediate line segment 32, denotes the length of the first main line segment 312, denotes the length of the second main line segment 332.

[0100] In particular, the preset angle lower boundary is equal to 40°, the preset angle upper boundary is equal to 50°, and the height constraint constant is equal to 1.

[0101] Preferably, the inclination angle of the first chamfered line segment 311, the inclination angle of the second chamfered line segment 313, the inclination angle of the third chamfered line segment 331, and the inclination angle of the fourth chamfered line segment 333 are all 45°, and the transmission quality of the signal is best when the inclination angle is 45°.

[0102] Further, in order to facilitate solving, the lengths of the first chamfered line segment 311, the second chamfered line segment 313, the third chamfered line segment 331, and the fourth chamfered line segment 333 are set to be equal, and the inclination angles are equal. For example, the lengths of the first chamfered line segment 311, the second chamfered line segment 313, the third chamfered line segment 331, and the fourth chamfered line segment 333 are all set to 1.0 mil, and the inclination angles are all 45°.

[0103] In the embodiment of the present application, the first chamfered line segment 311 and the second chamfered line segment 313 are inserted into the first main line segment 312, the third chamfered line segment 331 and the fourth chamfered line segment 333 are inserted into the second main line segment 332, and the first main line segment 312 and the second main line segment 332 are both perpendicular to the intermediate line segment 32, so that the added first main line segment 312 and the second main line segment 332 can directly compensate for the difference between the two transmission line segments, in addition, each chamfered line segment can also compensate for a certain difference, so that the compensation line segment 3 can compensate for more difference under the condition that the height of the intermediate line segment 32 is the same, thereby reducing the number of inserted compensation line segments 3 and improving the signal transmission quality.

[0104] In some embodiments, as Figure 8As shown, the first main body line segment 312 and the second main body line segment 332 are straight line segments, and the first chamfer line segment 311, the second chamfer line segment 313, the third chamfer line segment 331 and the fourth chamfer line segment 333 are circular arc lines.

[0105] Specifically, the radii corresponding to the circular arc lines of the first chamfer line segment 311, the second chamfer line segment 313, the third chamfer line segment 331 and the fourth chamfer line segment 333 are equal, and the angles corresponding to the circular arc lines of the first chamfer line segment 311, the second chamfer line segment 313, the third chamfer line segment 331 and the fourth chamfer line segment 333 are 90°, and correspondingly, the preset constraint condition includes:

[0106]

[0107] In the formula, represents the number of inserted compensation line segments 3, represents the length difference between the to-be-adjusted transmission line segment and the target transmission line segment when no compensation line segment 3 is inserted, represents the height of the intermediate line segment 32, represents the line spacing of the to-be-adjusted transmission line segment and the target transmission line segment, represents a height constraint constant, represents the inclination angle of the first chamfer line segment 311, represents the radius corresponding to the circular arc line of the first chamfer line segment 311, the second chamfer line segment 313, the third chamfer line segment 331 and the fourth chamfer line segment 333, represents the length of the first main body line segment 312, represents the length of the second main body line segment 332.

[0108] By replacing the chamfer line segment with a circular arc line, a new compensation line segment 3 construction can be provided, enriching the implementation of the wiring compensation. And by setting the angles corresponding to the four circular arc lines to 90°, the sum of the lengths of the four chamfer line segments is the circumference of a circle, which facilitates the setting and calculation of the preset constraint condition.

[0109] In some embodiments, the compensation line segment 3 includes a semicircular arc, the two ends of the semicircular arc are connected to the parallel segments on both sides, and the radius of the semicircular arc satisfies a preset constraint condition, so that the length of the to-be-adjusted transmission line segment and the length of the target transmission line segment are equal after the compensation line segment 3 is inserted, and the value of the number of inserted compensation line segments 3 is minimized. The shape parameter of the compensation line segment 3 includes the radius of the semicircular arc, and the preset constraint condition includes:

[0110]

[0111] In the formula, represents the number of inserted compensation line segments 3, represents the radius of the semicircular arc, denotes the length difference between the to-be-adjusted transmission line segment and the target transmission line segment when the compensation line segment 3 is not inserted, denotes a height constraint constant, denotes the line distance between the to-be-adjusted transmission line segment and the target transmission line segment.

[0112] Specifically, as shown in Figure 9 , the compensation line segment 3 in the semi-circular arc structure adopts a curved design, which can be applied to scenarios where a straight bulge cannot be added, thereby improving the application range of the printed circuit board.

[0113] In some embodiments, the compensation line segment 3 includes a first connecting line segment 31 and a second connecting line segment 33, one end of the first connecting line segment 31 is connected with a parallel segment on one side of the compensation line segment 3, the other end of the first connecting line segment 31 is connected with one end of the second connecting line segment 33 to form a wedge-shaped protrusion, and the other end of the second connecting line segment 33 is connected with a parallel segment on the other side of the compensation line segment 3;

[0114] The height of the wedge-shaped protrusion, the inclination angle of the first connecting line segment 31, and the inclination angle of the second connecting line segment 33 satisfy a preset constraint condition, so that the length of the to-be-adjusted transmission line segment and the length of the target transmission line segment are equal after the compensation line segment 3 is inserted, and the value of the number of inserted compensation line segments 3 is minimized. The shape parameters of the compensation line segment 3 include the height of the wedge-shaped protrusion, the inclination angle of the first connecting line segment 31, and the inclination angle of the second connecting line segment 33, and the preset constraint condition includes:

[0115]

[0116] In the formula, denotes the number of inserted compensation line segments 3, denotes the length difference between the to-be-adjusted transmission line segment and the target transmission line segment when the compensation line segment 3 is not inserted, denotes the height of the wedge-shaped protrusion, denotes the line distance between the to-be-adjusted transmission line segment and the target transmission line segment, denotes the inclination angle of the first connecting line segment 31, denotes the inclination angle of the second connecting line segment 33.

[0117] Specifically, as shown in Figure 10 , the height of the wedge-shaped protrusion is the distance from the highest point of the wedge-shaped protrusion to the to-be-compensated transmission line segment. The inclination angle of the first connecting line segment 31 and the inclination angle of the second connecting line segment 33 may be equal or not equal.

[0118] The wedge-shaped protrusion structure requires fewer compensation segments for the compensation segment 3 design, increasing design flexibility. By meeting preset constraints, the number of compensation segments 3 can be reduced while ensuring the compensation effect, thus improving compensation efficiency.

[0119] In some embodiments, the wedge-shaped protrusions may be configured as a series of consecutive protrusions to form a serrated structure.

[0120] It should be understood that in other embodiments, the added compensation segment 3 may also have a downwardly recessed structure. For example, the added compensation segment 3 is disposed on the transmission segment to be adjusted, and the compensation segment 3 may be trapezoidal, rectangular, wedge-shaped, semi-circular, etc., and the compensation segment 3 is recessed in the direction of the target transmission segment.

[0121] When compensation segment 3 is recessed downwards, it can reduce wiring space, but it will affect the signal transmission quality.

[0122] In some embodiments, the transmission line segments of the signal transmission line include a first transmission line segment 1 and a second transmission line segment 2 that are connected to each other. The line width of the first transmission line segment 1 is smaller than the line width of the second transmission line segment 2. The first transmission line segment 1 and the second transmission line segment 2 are connected by a gradient line segment 9. The first connection end of the gradient line segment 9 is connected to the first transmission line segment 1, and the second connection end of the gradient line segment 9 is connected to the second transmission line. The line width of the gradient line segment 9 gradually increases along the direction from the first connection end to the second connection end.

[0123] Specifically, the first transmission segment 1 and the second transmission segment 2 are located in different areas of the same layer of the printed circuit board, and have different line widths due to their respective routing constraints. For example, the first transmission segment 1 is located in the BGA area of ​​the chip and has a line width of 3.5 mil, while the second transmission segment 2 is located in the normal routing area of ​​the printed circuit board and has a line width of 5.0 mil.

[0124] like Figure 11 As shown, the distance between the end point of the first transmission line segment 1 and the starting point of the second transmission line segment 2 is about 3 mil. After setting the first transmission line segment 1 and the second transmission line segment 2 to be of equal length, the first transmission line segment 1 and the second transmission line segment 2 of the signal transmission line are connected by a gradient line segment 9. The shape of the gradient line segment 9 of the two signal transmission lines is symmetrical with respect to the center line of the two signal transmission lines and has the same length, ensuring that the signal transmission delay is the same.

[0125] The line width of the gradient segment 9 gradually increases along the direction from the first connection end to the second connection end, which can reduce the impedance change between two transmission lines with different line widths.

[0126] The design of the gradual change line segment 9 makes the line width change more smoothly, and the gradual change line segment 9 is used to connect between the first transmission line segment 1 and the second transmission line segment 2 with different line widths, avoiding the discontinuity of single-point impedance caused by the traditional wiring method, so that the impedance can be smoothly transferred, greatly improving the signal integrity and the signal design quality.

[0127] Further, the width of the first connecting end is the same as the line width of the first transmission line segment 1, and the connecting end surface of the first connecting end coincides with the connecting end surface of the first transmission line segment 1, and the width of the second connecting end is the same as the line width of the second transmission line segment 2, and the connecting end surface of the second connecting end coincides with the connecting end surface of the second transmission line segment 2.

[0128] In this way, the widths of the two connecting ends of the gradual change line segment 9 are the same as the first transmission line segment 1 and the second transmission line segment 2 respectively, which ensures the smooth connection of the gradual change line segment 9 with the first transmission line segment 1 and the second transmission line segment 2, further reduces the signal reflection and impedance mismatch problem, and improves the quality and reliability of signal transmission.

[0129] In some embodiments, the signal transmission line adopts a differential signal line. The differential signal line is arranged in pairs, and a pair of differential signal lines, i.e., a differential signal line P and a differential signal line N, are used to transmit two signals with equal size and opposite polarity respectively. When designing the differential signal line, the differential signal line P and the differential signal line N need to be strictly equal in length.

[0130] Further, the printed circuit board further comprises a first electronic element 5 and a second electronic element 6, and the two ends of the differential signal line are connected with the first electronic element 5 and the second electronic element 6 respectively.

[0131] Specifically, the first electronic element 5 and the second electronic element 6 are respectively used as the sending end and the receiving end of the differential signal, and the first electronic element 5 and the second electronic element 6 can be various types of chips such as a field programmable gate array (FPGA), a microcontroller unit (MCU), etc.

[0132] For example, the first electronic component 5 is a chip A, and the second electronic component 6 is a chip B. The chip A and the chip B can be different types of chips or the same type of chips. At least one pair of differential signal lines is connected between the chip A and the chip B, and differential signals are transmitted through the differential signal lines. The differential signal transmission is based on two signals of equal size and opposite polarity to transmit information. When the chip A is a sending end, it simultaneously generates the two complementary signals and transmits them through the differential signal line P and the differential signal line N. Due to the characteristics of the two signals, they are affected by the same external interference during transmission. When reaching the receiving end chip B, the chip B performs differential operation, that is, subtraction operation, on the two signals. In this way, the same part of the external interference introduced in the two signals is eliminated, thereby greatly improving the anti-interference capability of the signals.

[0133] The differential signal lines are widely used in server boards. In the design of the server boards, in order to fully exert the advantages of the differential signal lines, it is necessary to ensure that the differential signal line P and the differential signal line N are strictly equal in length. Therefore, the printed circuit board in the embodiments of the present application can be applied to a server, and the overall reliability and stability of the server board are improved.

[0134] The embodiments of the present application also provide a server comprising the printed circuit board in any of the above embodiments.

[0135] The embodiments of the present application also provide a wiring compensation design method applied to design the printed circuit board in any of the above embodiments. As shown in the figure, the method comprises the following steps. Figure 12

[0136] In step S101, the signal transmission lines are divided into a plurality of transmission line segments connected in sequence according to preset time delay characteristics of the signal transmission lines in different regions of the printed circuit board. Different transmission line segments of the same signal transmission line have different unit length transmission time delays. The transmission line segments of different signal transmission lines are arranged oppositely, and the unit length transmission time delays of the opposite transmission line segments are the same.

[0137] In step S102, wiring compensation is performed on the two opposite transmission line segments, so that the lengths of any two opposite transmission line segments are equal.

[0138] In some embodiments, the preset time delay characteristics include line width. In step S101, the signal transmission lines in the first layer of the printed circuit board are divided into the first transmission line segment 1 and the second transmission line segment 2 connected in sequence according to the line width. The line widths of the first transmission line segment 1 and the second transmission line segment 2 are different.

[0139] In step S1011, the signal transmission lines in the first layer of the printed circuit board are divided into the first transmission line segment 1 and the second transmission line segment 2 connected in sequence according to the line width. The line widths of the first transmission line segment 1 and the second transmission line segment 2 are different. ​

[0140] In some embodiments, the preset delay characteristic further comprises a wiring position, after the signal transmission line on the first layer of the printed circuit board is divided into the first transmission line segment 1 and the second transmission line segment 2 according to the different line widths, comprising:

[0141] Step S1012, according to the wiring position, the signal transmission line on the second layer of the printed circuit board is divided into the third transmission line segment 4, wherein the second transmission line segment 2 and the third transmission line segment 4 are connected through the via.

[0142] In some embodiments, in step S102, the relative two transmission line segments are wired to compensate, so that the length of any two relative transmission line segments is equal, comprising.

[0143] Step S1021, obtaining the length difference between the to-be-adjusted transmission line segment and the target transmission line segment when the compensation line segment 3 is not inserted;

[0144] Step S1022, establishing a preset constraint condition according to the length difference;

[0145] Step S1023, according to the preset constraint condition, the minimum value of the number of compensation line segments 3 that satisfies the preset constraint condition is obtained, and the minimum value of the compensation line segment 3 is taken as the insertion number of the compensation line segment 3.

[0146] Step S1024, determining the shape parameters of the compensation line segment 3 according to the insertion number of the compensation line segment 3.

[0147] In some embodiments, the compensation line segment 3 comprises a first connecting line segment 31, an intermediate line segment 32 and a second connecting line segment 33 connected in turn, both ends of the first connecting line segment 31 are connected with one end of the intermediate line segment 32 and the parallel segment on one side of the compensation line segment 3 respectively, both ends of the second connecting line segment 33 are connected with the other end of the intermediate line segment 32 and the parallel segment on the other side of the compensation line segment 3 respectively; the intermediate line segment 32 and the parallel segment of the target transmission line segment are parallel, the first connecting line segment 31 and the second connecting line segment 33 are symmetrically arranged relative to the central axis of the intermediate line segment 32, and the first connecting line segment 31 and the second connecting line segment 33 are both inclined to the direction close to the intermediate line segment 32, that is, the shape of the compensation line segment 3 is trapezoidal.

[0148] When the shape of the compensation line segment 3 is trapezoidal, the shape parameters of the compensation line segment 3 include the height of the intermediate line segment 32 and the inclination angle of the first connecting line segment 31, and the preset constraint condition includes:

[0149]

[0150] In the formula, N represents the number of inserted compensation line segments 3, L1 represents the length of the first connecting line segment 31, denotes a preset angle lower boundary of the inclination angle of the first connection line segment 31, and denote a preset angle lower boundary and a preset angle upper boundary respectively, denotes a height constraint constant, denotes a length difference between the to-be-adjusted transmission line segment and the target transmission line segment when the compensation line segment 3 is not inserted, denotes a height of the intermediate line segment 32, denotes a line distance of the to-be-adjusted transmission line segment and the target transmission line segment.

[0151] Specifically, the preset angle lower boundary of the inclination angle of the first connection line segment 31 has a value range of 38° to 42°, the preset angle upper boundary of the inclination angle of the first connection line segment 31 has a value range of 48° to 52°, the height constraint constant has a value range of 0.8 to 1.2, and the length of the intermediate line segment 32 has a value range of 2 to 4 .

[0152] In some embodiments, the first connection line segment 31 includes a first chamfer line segment 311, a first main body line segment 312 and a second chamfer line segment 313 connected in sequence, the second connection line segment 33 includes a third chamfer line segment 331, a second main body line segment 332 and a fourth chamfer line segment 333 connected in sequence, two ends of the first chamfer line segment 311 are connected with one end of the intermediate line segment 32 and a parallel segment on one side of the compensation line segment 3 respectively, two ends of the fourth chamfer line segment 333 are connected with the other end of the intermediate line segment 32 and a parallel segment on the other side of the compensation line segment 3 respectively, the parallel segments of the intermediate line segment 32 and the target transmission line segment are parallel, the first main body line segment 312 and the second main body line segment 332 are both perpendicular to the parallel segments of the target transmission line segment, and the first connection line segment 31 and the second connection line segment 33 are symmetrically arranged with respect to the central axis of the intermediate line segment 32.

[0153] By connecting each line segment through the first chamfer line segment 311, the second chamfer line segment 313, the third chamfer line segment 331 and the fourth chamfer line segment 333, the included angle between the connected line segments can be avoided to be small, and the connection of the line segments is smooth, thereby improving the signal transmission quality.

[0154] In some embodiments, the first chamfer line segment 311, the first main body line segment 312, the second chamfer line segment 313, the intermediate line segment 32, the third chamfer line segment 331, the second main body line segment 332 and the fourth chamfer line segment 333 are all straight line segments. Correspondingly, the preset constraint condition includes:

[0155]

[0156] In the formula, denotes the number of the inserted compensation line segment 3, represents the length difference between the to-be-adjusted transmission line segment and the target transmission line segment when the compensation line segment 3 is not inserted, represents the height of the intermediate line segment 32, represents the line distance of the to-be-adjusted transmission line segment and the target transmission line segment, and respectively represent the lower boundary and the upper boundary of the preset angle, represents the height constraint constant, represents the inclination angle of the first chamfer line segment 311, represents the inclination angle of the second chamfer line segment 313, represents the inclination angle of the third chamfer line segment 331, represents the inclination angle of the fourth chamfer line segment 333, represents the length of the projection of the first chamfer line segment 311 in the direction perpendicular to the intermediate line segment 32, represents the length of the projection of the second chamfer line segment 313 in the direction perpendicular to the intermediate line segment 32, represents the length of the projection of the third chamfer line segment 331 in the direction perpendicular to the intermediate line segment 32, represents the length of the projection of the fourth chamfer line segment 333 in the direction perpendicular to the intermediate line segment 32, represents the length of the first main body line segment 312, represents the length of the second main body line segment 332.

[0157] In the embodiments of the present application, the first chamfer line segment 311 and the second chamfer line segment 313 are inserted into the first main body line segment 312, and the third chamfer line segment 331 and the fourth chamfer line segment 333 are inserted into the second main body line segment 332, and the first main body line segment 312 and the second main body line segment 332 are both perpendicular to the intermediate line segment 32, so that the increased first main body line segment 312 and the second main body line segment 332 can directly compensate for the difference between the two transmission line segments, and in addition, each chamfer line segment can also compensate for a certain difference, so that the compensation line segment 3 can compensate for more differences under the condition that the height of the intermediate line segment 32 is the same, thereby reducing the number of inserted compensation line segments 3 and improving the signal transmission quality.

[0158] In some embodiments, the first main body line segment 312 and the second main body line segment 332 are both straight line segments, and the first chamfer line segment 311, the second chamfer line segment 313, the third chamfer line segment 331 and the fourth chamfer line segment 333 are all circular arcs.

[0159] Specifically, the radii corresponding to the arc lines of the first chamfered line segment 311, the second chamfered line segment 313, the third chamfered line segment 331 and the fourth chamfered line segment 333 are equal, and the angles corresponding to the arc lines of the first chamfered line segment 311, the second chamfered line segment 313, the third chamfered line segment 331 and the fourth chamfered line segment 333 are 90°. Correspondingly, the preset constraint condition includes:

[0160]

[0161] In the formula, represents the number of inserted compensation line segments 3, represents the length difference between the to-be-adjusted transmission line segment and the target transmission line segment when the compensation line segment 3 is not inserted, represents the height of the intermediate line segment 32, represents the line spacing of the to-be-adjusted transmission line segment and the target transmission line segment, represents a height constraint constant, represents the inclination angle of the first chamfered line segment 311, represents the radius corresponding to the arc line of the first chamfered line segment 311, the second chamfered line segment 313, the third chamfered line segment 331 and the fourth chamfered line segment 333, represents the length of the first main body line segment 312, represents the length of the second main body line segment 332.

[0162] By replacing the chamfered line segment with an arc line, a new compensation line segment 3 structure can be provided, enriching the implementation of the wiring compensation. And by setting the angles corresponding to the four arc lines to 90°, the sum of the lengths of the four chamfered line segments is the circumference of a circle, which facilitates the setting and calculation of the preset constraint condition.

[0163] In some embodiments, the compensation line segment 3 includes a semicircular arc, the two ends of the semicircular arc are connected to the parallel segments on both sides, and the radius of the semicircular arc satisfies a preset constraint condition, so that the length of the to-be-adjusted transmission line segment and the length of the target transmission line segment are equal after the compensation line segment 3 is inserted, and the value of the number of inserted compensation line segments 3 is minimized. The preset constraint condition includes:

[0164]

[0165] In the formula, represents the number of inserted compensation line segments 3, represents the radius of the semicircular arc, represents the length difference between the to-be-adjusted transmission line segment and the target transmission line segment when the compensation line segment 3 is not inserted, represents a height constraint constant, represents the line spacing of the to-be-adjusted transmission line segment and the target transmission line segment.

[0166] Specifically, the compensation line segment 3 in the semi-circular arc structure is designed in a curve, which can be applied to a scenario where a straight line bump cannot be added, thereby improving the application range of the printed circuit board.

[0167] In some embodiments, the compensation line segment 3 includes a first connecting line segment 31 and a second connecting line segment 33, one end of the first connecting line segment 31 is connected with a parallel segment on one side of the compensation line segment 3, the other end of the first connecting line segment 31 is connected with one end of the second connecting line segment 33 to form a wedge-shaped protrusion, and the other end of the second connecting line segment 33 is connected with a parallel segment on the other side of the compensation line segment 3.

[0168] The height of the wedge-shaped protrusion, the inclination angle of the first connecting line segment 31, and the inclination angle of the second connecting line segment 33 satisfy a preset constraint condition, so that the length of the to-be-adjusted transmission line segment and the length of the target transmission line segment are equal after the compensation line segment 3 is inserted, and the value of the number of the inserted compensation line segments 3 is minimized, and the preset constraint condition includes:

[0169]

[0170] In the formula, represents the number of the inserted compensation line segments 3, represents the length difference between the to-be-adjusted transmission line segment and the target transmission line segment when the compensation line segment 3 is not inserted, represents the height of the wedge-shaped protrusion, represents the line spacing of the to-be-adjusted transmission line segment and the target transmission line segment, represents the inclination angle of the first connecting line segment 31, represents the inclination angle of the second connecting line segment 33.

[0171] Specifically, the height of the wedge-shaped protrusion is the distance from the highest point of the wedge-shaped protrusion to the to-be-compensated transmission line segment. The inclination angle of the first connecting line segment 31 and the inclination angle of the second connecting line segment 33 may be equal or not equal.

[0172] The wedge-shaped protrusion structure of the compensation line segment 3 requires a small number of line segments for design, which increases the flexibility of the design. By satisfying the preset constraint condition, the compensation efficiency can be improved while ensuring the compensation effect and reducing the number of compensation line segments 3.

[0173] It should be understood that in other embodiments, the added compensation line segment 3 can also adopt a downward protruding structure.

[0174] The wiring compensation design method of the embodiments of the present application will be described below in conjunction with a specific example.

[0175] The printed circuit board includes a first wiring layer and a second wiring layer. Each signal transmission line includes a first transmission segment 1, a second transmission segment 2 and a third transmission segment 4. The first transmission segment 1 and the second transmission segment 2 are both disposed on the first wiring layer, and the third transmission segment 4 is disposed on the second wiring layer. The third transmission segment 4 and the second transmission segment 2 are connected by a via connecting the first wiring layer and the second wiring layer.

[0176] The first transmission segments 1 of the two signal transmission lines are positioned opposite each other, serving as the transmission segment to be adjusted and the target transmission segment, respectively. The compensation segment 3 is trapezoidal in shape. When the compensation segment 3 is not inserted, the length of the transmission segment to be adjusted is less than the length of the target transmission segment, and the length difference is... It equals 20mil.

[0177] First, perform wiring compensation on the first transmission segment 1 of the two signal transmission lines. The line width of the first transmission segment 1 of the two signal transmission lines... 3.5mil, line spacing The lower boundary of the preset angle for the tilt angle of the first connecting segment 31 is set to 4mil. The upper boundary of the inclination angle of the first connecting line segment 31 is equal to 40°. Equal to 50°, height constraint constant The length of the middle segment 32 is equal to 1, and its range is 3. The preset constraints are:

[0178]

[0179] Set the solution precision to one decimal place.

[0180] Calculated based on preset constraints:

[0181]

[0182] To minimize To maximize the denominator ,because and Therefore, take The maximum value is , .therefore, The supremum is 4 × 0.4663 = 1.8652. The lower bound is approximately 5.362, because Since it is an integer, After verification When the value is 5, the above preset constraint conditions cannot be met. Therefore, the minimum number of compensation line segments 3 that meet the preset constraint conditions is 6.

[0183] Further, the above-mentioned preset constraint condition is substituted into the equation , and the maximum corresponding to =6 is calculated and obtained , and the corresponding tilt angle .

[0184] When =6, we have:

[0185]

[0186] Since , we have:

[0187]

[0188] The solution is .

[0189] Because tan22.5°≈0.4142<0.416675, tan23°≈0.4245>0.416675, by difference, , that is , when , , the maximum value is 4.0 mil.

[0190] Therefore, when designing the first transmission line segment 1, the number of inserted compensation line segments 3 is set to 6, the tilt angle is set to , and the height of the middle line segment 32 is set to 4.0 mil. According to this, the wiring is performed, so that the to-be-adjusted transmission line segment and the target line segment are completely equal in length, and the number of inserted compensation line segments 3 is minimized.

[0191] After compensating the first transmission line segment 1, at a point about 2 mil from the end of the 3.5-mil line width, the normal wiring of 5-mil line width and 6-mil line spacing is drawn with the center line of the 3.5-mil differential line as the starting point, that is, the second transmission line segment 2. The same way is used to compensate the wiring of the second transmission line segment 2.

[0192] The gradual change segment 9 is arranged between the first transmission line segment 1 and the second transmission line segment 2 of the same signal transmission line, the first connecting end of the gradual change segment 9 is connected with the first transmission line segment 1, the second connecting end of the gradual change segment 9 is connected with the second transmission line segment 2, the line width of the gradual change segment 9 gradually increases in the direction from the first connecting end to the second connecting end, the width of the first connecting end is the same as the line width of the first transmission line segment 1, and the connecting end surface of the first connecting end coincides with the connecting end surface of the first transmission line segment 1, the width of the second connecting end is the same as the line width of the second transmission line segment 2, and the connecting end surface of the second connecting end coincides with the connecting end surface of the second transmission line segment 2. In this way, the impedance at the connection changes smoothly, the discontinuity of the single-point impedance is avoided, and the signal quality is improved.

[0193] Further, for the third transmission line segment 4 on the second wiring layer, the same wiring compensation can also be adopted. In this way, the wiring of the signal transmission line from the sending end to the receiving end is completed, and due to the different line widths and different levels, the two signal transmission lines are completely equal in length, and theoretically, the time delays of the two signal transmission lines in signal transmission are completely the same, and the signals arrive at the receiving end at the same time, so that the signal integrity design quality is greatly improved.

[0194] For other shapes of the compensation segment 3, the shape parameters of the corresponding compensation segment 3 can also be solved according to the corresponding preset constraint conditions.

[0195] The wiring compensation design method of the embodiment of the application ensures the consistency of the time delays of the two signal transmission lines in signal transmission by arranging the transmission line segments of different unit lengths in the two signal transmission lines to be equal in length, adopting the segmented equal-length design of the signal transmission line in different regions, and ensuring that the signals transmitted by the two signal transmission lines arrive at the same time, so that the signal integrity design quality can be greatly improved.

[0196] The shape parameters of the compensation segment 3 are constrained by the preset constraint conditions, and the shape parameters of the compensation segment 3 are dynamically solved, so that the equal-length wiring requirement can be met, the number of the inserted compensation segments 3 is small, and compared with the traditional scheme in which each compensation segment 3 compensates for a fixed length, the compensation precision can be improved, and it is ensured that each transmission line segment is strictly equal in length.

[0197] For the first connecting line segment 31 and the second connecting line segment 33 with different thicknesses, there are impedance discontinuous points, and the embodiment of the application connects them through the gradual change segment 9, so that the impedance at the connection changes smoothly, the discontinuity of the single-point impedance is avoided, and the signal quality is improved.

[0198] Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be realized by means of software and a necessary general hardware platform, of course, it can also be realized by hardware, but in many cases, the former is a better embodiment.

[0199] Embodiments of the present application also provide a wiring compensation design device, which is applied to design any one of the printed circuit boards mentioned above, as shown in the figure, the device comprises: Figure 13

[0200] a transmission line segmenting module 101, configured to segment the signal transmission lines into a plurality of transmission line segments connected in sequence according to preset time delay characteristics of the signal transmission lines in different regions of the printed circuit board, wherein different transmission line segments of the same signal transmission line have different unit length transmission time delays, and the transmission line segments of different signal transmission lines are arranged oppositely and have the same unit length transmission time delay;

[0201] a segment compensation module 102, configured to compensate the wiring of the two opposite transmission line segments so that the lengths of any two opposite transmission line segments are equal.

[0202] In some embodiments, the preset time delay characteristics include line width, and the transmission line segmenting module comprises:

[0203] a line width segmenting module, configured to segment the signal transmission lines on the first layer of the printed circuit board into the first transmission line segment 1 and the second transmission line segment 2 connected in sequence according to the different line widths, wherein the line widths of the first transmission line segment 1 and the second transmission line segment 2 are different.

[0204] In some embodiments, the preset time delay characteristics also include wiring position, and the transmission line segmenting module further comprises:

[0205] a position segmenting module, configured to segment the signal transmission lines on the second layer of the printed circuit board into the third transmission line segment 4 according to the wiring position, wherein the second transmission line segment 2 and the third transmission line segment 4 are connected through a via.

[0206] In some embodiments, the segment compensation module comprises.

[0207] an interpolation obtaining module, configured to obtain the length difference between the to-be-adjusted transmission line segment and the target transmission line segment when the compensation line segment 3 is not inserted;

[0208] a constraint condition establishing module, configured to establish a preset constraint condition according to the length difference;

[0209] a parameter solving module, configured to solve according to the preset constraint condition to obtain the minimum value of the number of the compensation line segments 3 that meet the preset constraint condition, and take the minimum value of the compensation line segment 3 as the insertion number of the compensation line segment 3;

[0210] a line segment inserting module, configured to determine the shape parameters of the compensation line segment 3 according to the insertion number of the compensation line segment 3.

[0211] ​The features of the embodiments of the wiring compensation design device can be referred to the related descriptions of the embodiments of the wiring compensation design method, which will not be repeated here.

[0212] The embodiments of the present application also provide an electronic device, as shown in the figure, comprising a memory 10 and a processor 20, the memory 10 stores a computer program, and the processor 20 is configured to run the computer program to perform the steps in any of the above embodiments of the wiring compensation design method. Figure 14

[0213] The embodiments of the present application also provide a computer readable storage medium, which stores a computer program, wherein the computer program is configured to perform the steps in any of the above embodiments of the wiring compensation design method when running.

[0214] In an example embodiment, the above computer readable storage medium can include, but is not limited to, a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store computer programs.

[0215] The embodiments of the present application also provide a computer program product, which comprises a computer program, and the computer program is executed by a processor to implement the steps in any of the above embodiments of the wiring compensation design method.

[0216] The embodiments of the present application also provide another computer program product, which comprises a non-volatile computer readable storage medium, and the non-volatile computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the steps in any of the above embodiments of the wiring compensation design method.

[0217] The skilled person can further realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized by electronic hardware, computer software or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the components and steps of the examples have been described in general terms in the above description. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0218] ​The above describes in detail a printed circuit board, a server, a wiring compensation method, a device, equipment and a medium provided by the present application. The principles and implementation modes of the present application are described by applying specific examples, and the above description of the embodiments is only applicable to help understand the method and core idea of the present application. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A printed circuit board, characterized by The printed circuit board is provided with at least two signal transmission lines; The signal transmission lines comprise a plurality of transmission line segments connected in sequence, different transmission line segments of the same signal transmission line have different unit length transmission time delays, the transmission line segments of different signal transmission lines are arranged oppositely and have the same unit length transmission time delay; Any two opposite transmission line segments are a to-be-adjusted transmission line segment and a target transmission line segment, the to-be-adjusted transmission line segment and the target transmission line segment each comprise a parallel segment, the length of the parallel segment of the to-be-adjusted transmission line segment is smaller than the length of the parallel segment of the target transmission line segment, the to-be-adjusted transmission line segment further comprises a plurality of compensation line segments, the compensation line segments are inserted between the parallel segments of the to-be-adjusted transmission line segment, so that the lengths of any two opposite transmission line segments are the same.

2. Printed circuit board according to claim 1, characterized in that The transmission line segments of the signal transmission lines comprise a first transmission line segment and a second transmission line segment connected to each other, the line width of the first transmission line segment is different from the line width of the second transmission line segment.

3. Printed circuit board according to claim 2, characterized in that The printed circuit board comprises a first wiring layer and a second wiring layer, the first transmission line segment and the second transmission line segment are arranged on the first wiring layer, the transmission line segments of the signal transmission lines further comprise a third transmission line segment, the third transmission line segment is arranged on the second wiring layer, and the third transmission line segment and the second transmission line segment are connected through a via hole connecting the first wiring layer and the second wiring layer.

4. The printed circuit board of claim 1, wherein, The printed circuit board comprises a first wiring layer and a second wiring layer, the transmission line segments of the signal transmission lines comprise a fourth transmission line segment and a fifth transmission line segment connected to each other, the fourth transmission line segment is arranged on the first wiring layer, the fifth transmission line segment is arranged on the second wiring layer, and the fourth transmission line segment and the fifth transmission line segment are connected through a via hole connecting the first wiring layer and the second wiring layer.

5. The printed circuit board of claim 1, wherein, The shape parameters of the compensation line segment satisfy a preset constraint condition, so that the lengths of the to-be-adjusted transmission line segment and the target transmission line segment are equal after the compensation line segment is inserted, and the value of the number of the inserted compensation line segments is minimum.

6. The printed circuit board of claim 5, wherein, The compensation line segment comprises a first connecting line segment, an intermediate line segment and a second connecting line segment connected in sequence, two ends of the first connecting line segment are connected to one end of the intermediate line segment and a parallel segment on one side of the compensation line segment respectively, and two ends of the second connecting line segment are connected to the other end of the intermediate line segment and a parallel segment on the other side of the compensation line segment respectively. The intermediate line segment is parallel to the parallel segment of the target transmission line segment, the first connecting line segment and the second connecting line segment are symmetrically arranged relative to the central axis of the intermediate line segment, the height of the intermediate line segment and the inclination angle of the first connecting line segment satisfy a preset constraint condition, so that the lengths of the to-be-adjusted transmission line segment and the target transmission line segment are equal after the compensation line segment is inserted, and the value of the number of the inserted compensation line segments is minimum, and the shape parameters of the compensation line segment comprise the height of the intermediate line segment and the inclination angle of the first connecting line segment.

7. Printed circuit board according to claim 6, characterized in that The first connection line segment and the second connection line segment are both inclined towards the direction close to the middle line segment; The preset constraint condition comprises: In the formula, represents the number of the inserted compensation line segments, represents the length of the first connection line segment, represents the inclination angle of the first connection line segment, and respectively represent the lower boundary under the preset angle and the upper boundary under the preset angle, represents the height constraint constant, represents the length difference between the to-be-adjusted transmission line segment and the target transmission line segment when the compensation line segment is not inserted, represents the height of the intermediate line segment, represents the line spacing of the to-be-adjusted transmission line segment and the target transmission line segment.

8. Printed circuit board according to claim 7, characterized in that The value range of the preset angle lower boundary is 38° to 42°, the value range of the preset angle upper boundary is 48° to 52°, and the value range of the height constraint constant is 0.8 to 1.

2.

9. Printed circuit board according to claim 8, characterized in that The length of the intermediate line segment ranges from 2 to 4 , is the line width of the transmission line segment to be adjusted.

10. The printed circuit board of claim 5, wherein, The compensation line segment comprises a semicircular arc, two ends of the semicircular arc are connected with the parallel segments on two sides respectively, and the radius of the semicircular arc satisfies the preset constraint condition, so that the length of the to-be-adjusted transmission line segment after inserting the compensation line segment is equal to the length of the target transmission line segment, and the value of the number of the inserted compensation line segments is minimum, the shape parameter of the compensation line segment comprises the radius of the semicircular arc, and the preset constraint condition comprises: In the formula, represents the number of the inserted compensation line segments, represents the radius of the semicircular arc, represents the length difference between the to-be-adjusted transmission line segment and the target transmission line segment when the compensation line segment is not inserted, represents a height constraint constant, represents the line spacing of the to-be-adjusted transmission line segment and the target transmission line segment.

11. The printed circuit board of claim 5, wherein, The compensation line segment comprises a first connection line segment and a second connection line segment, one end of the first connection line segment is connected with the parallel segment on one side of the compensation line segment, the other end of the first connection line segment is connected with one end of the second connection line segment to form a wedge-shaped protrusion, and the other end of the second connection line segment is connected with the parallel segment on the other side of the compensation line segment. The height of the wedge-shaped protrusion, the inclination angle of the first connection line segment, and the inclination angle of the second connection line segment satisfy the preset constraint condition, so that the length of the to-be-adjusted transmission line segment after inserting the compensation line segment is equal to the length of the target transmission line segment, and the value of the number of the inserted compensation line segments is minimum, the shape parameter of the compensation line segment comprises the height of the wedge-shaped protrusion, the inclination angle of the first connection line segment, and the inclination angle of the second connection line segment, and the preset constraint condition comprises: In the formula, represents the number of the inserted compensation line segments, represents the length difference between the to-be-adjusted transmission line segment and the target transmission line segment when the compensation line segment is not inserted, represents the height of the wedge-shaped protrusion, represents the line spacing of the to-be-adjusted transmission line segment and the target transmission line segment, represents the inclination angle of the first connection line segment, represents the inclination angle of the second connection line segment.

12. The printed circuit board of claim 1, wherein, The transmission line segment of the signal transmission line comprises a first transmission line segment and a second transmission line segment connected with each other, the line width of the first transmission line segment is smaller than the line width of the second transmission line segment, the first transmission line segment and the second transmission line segment are connected through a gradual change line segment, the first connection end of the gradual change line segment is connected with the first transmission line segment, the second connection end of the gradual change line segment is connected with the second transmission line, and the line width of the gradual change line segment gradually increases along the direction from the first connection end to the second connection end.

13. The printed circuit board of claim 12, wherein, The width of the first connection end is the same as the line width of the first transmission line segment, and the connection end face of the first connection end and the first transmission line segment is coincident, and the width of the second connection end is the same as the line width of the second transmission line segment, and the connection end face of the second connection end and the second transmission line segment is coincident.

14. The printed circuit board of claim 1, wherein, The signal transmission line is a differential signal line.

15. The printed circuit board of claim 14, wherein, The printed circuit board further comprises a first electronic element and a second electronic element, and two ends of the differential signal line are connected with the first electronic element and the second electronic element respectively.

16. A server, characterized by The printed circuit board comprises any one of claims 1 to 15.

17. A wiring compensation design method characterized by comprising: The printed circuit board is designed by using the method, and comprises: The printed circuit board is designed by using the method, and comprises: According to preset time delay characteristics of the signal transmission lines in different areas of the printed circuit board, the signal transmission lines are divided into a plurality of transmission line segments connected in sequence, wherein different transmission line segments of the same signal transmission line have different unit length transmission time delays, and transmission line segments of different signal transmission lines are arranged oppositely and have the same unit length transmission time delay. The two opposite transmission line segments are routed and compensated to make the lengths of any two opposite transmission line segments equal.

18. A wiring compensation design apparatus, characterized by comprising: The application is applied to design the printed circuit board as claimed in any one of claims 1 to 15, comprising: a transmission line segmenting module for dividing the signal transmission lines into a plurality of transmission line segments connected in sequence according to preset time delay characteristics of the signal transmission lines in different areas of the printed circuit board, wherein different transmission line segments of the same signal transmission line have different unit length transmission time delays, and transmission line segments of different signal transmission lines are arranged oppositely and have the same unit length transmission time delay; a segment compensating module for routing and compensating the two opposite transmission line segments to make the lengths of any two opposite transmission line segments equal.

19. An electronic device, comprising: comprising: a memory for storing a computer program; a processor for executing the computer program to realize the steps of the routing compensation design method as claimed in claim 17.

20. A computer-readable storage medium, characterized in that, The computer program is stored in the computer readable storage medium, and the computer program is executed by the processor to realize the steps of the routing compensation design method as claimed in claim 17.

21. A computer program product, characterised in that, The computer program comprises computer instructions for making the computer execute the steps of the routing compensation design method as claimed in claim 17.

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