Printed circuit board, electronic equipment and manufacturing method of printed circuit board

Abstract

The invention discloses a printed circuit board, electronic equipment and a manufacturing method of the printed circuit board. The printed circuit board comprises an epoxy glass fiber board, the epoxy glass fiber board comprises glass fiber bundles in the horizontal direction and the vertical direction, and the space between every two adjacent glass fiber bundles is filled with resin; the first differential lines are located on the surface of the epoxy glass fiber board, each signal transmission line in the first differential lines comprises M sections, and M is an integer larger than or equal to 2; under the condition that the overall wiring direction of the first differential line is the horizontal direction, the included angles between at least any two sections in the M sections and the horizontal direction are not equal, the projection length of each section in the vertical direction is N times that of a first period, and the first period is a glass fiber bundle period in the vertical direction; or, under the condition that the overall wiring direction of the first differential line is the vertical direction, the included angles between at least any two sections in the M sections and the vertical direction are not equal, the projection length of each section in the horizontal direction is L times that of the second period, and the second period is the glass fiber bundle period in the horizontal direction.

Description

Technical Field

[0001] This application relates to the field of computer technology, and in particular to a printed circuit board, electronic device, and a method for manufacturing a printed circuit board. Background Technology

[0002] In signal integrity (SI) analysis, skew is a crucial parameter, referring to the time difference between different signals arriving at their destination along the same signal path. However, variations in wiring length, material properties, and wiring methods can lead to inconsistent delays during signal transmission. Therefore, optimizing skew to improve signal transmission quality is a critical technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0003] This application provides a printed circuit board, an electronic device, and a method for manufacturing a printed circuit board, which can solve the problem of how to optimize Skew to improve signal transmission quality.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, a printed circuit board is provided, comprising: an epoxy fiberglass board, the epoxy fiberglass board including fiberglass bundles in a horizontal and vertical direction, with resin filling between adjacent fiberglass bundles; a first differential line located on the surface of the epoxy fiberglass board, each signal transmission line in the first differential line including M segments, where M is an integer greater than or equal to 2; wherein, when the overall wiring direction of the first differential line is horizontal, at least two segments in the M segments have unequal angles with the horizontal direction, and the projected length of each segment in the vertical direction is N times a first period, where the first period is the fiberglass bundle period in the vertical direction; or, when the overall wiring direction of the first differential line is vertical, at least two segments in the M segments have unequal angles with the vertical direction, and the projected length of each segment in the horizontal direction is L times a second period, where the second period is the fiberglass bundle period in the horizontal direction, where N and L are both integers greater than or equal to 1.

[0005] In a second aspect, an electronic device is provided, comprising the printed circuit board described in the first aspect.

[0006] Thirdly, a method for manufacturing a printed circuit board is provided, comprising: obtaining an epoxy fiberglass board by arranging fiberglass bundles in a horizontal direction according to a first cycle and in a vertical direction according to a second cycle, wherein resin is filled between two adjacent fiberglass bundles; and setting a first differential line on the surface of the epoxy fiberglass board according to a target direction, wherein the first differential line includes M segments, the target direction is the overall wiring direction of the first differential line, and when the target direction is horizontal, at least two segments in the M segments have unequal angles with the horizontal direction, and the projected length of each segment in the vertical direction is N times the first cycle; or, when the target direction is vertical, at least two segments in the M segments have unequal angles with the vertical direction, and the projected length of each segment in the horizontal direction is L times the second cycle, wherein M is an integer greater than or equal to 2, and N and L are both integers greater than or equal to 1.

[0007] Fourthly, a readable storage medium is provided, wherein at least one computer program is stored therein, which, when loaded and executed by a processor, implements the method described in the third aspect.

[0008] Fifthly, a computer program product is provided, the computer program product comprising at least one computer program that, when loaded and executed by a processor, implements the method as described in the third aspect.

[0009] In this embodiment, a printed circuit board is provided, including an epoxy fiberglass board. The epoxy fiberglass board includes fiberglass bundles in the horizontal and vertical directions, with resin filling the spaces between adjacent fiberglass bundles. A first differential line is located on the surface of the epoxy fiberglass board. Each signal transmission line in the first differential line includes M segments, where M is an integer greater than or equal to 2. Wherein, when the overall wiring direction of the first differential line is horizontal, at least two segments in the M segments have unequal angles with the horizontal direction. The projected length of each segment in the vertical direction is N times the first period, where the first period is the length of the fiberglass bundles in the vertical direction. The fiber optic bundle period; or, when the overall routing direction of the first differential line is vertical, at least two segments in segment M have unequal angles with the vertical direction, and the projected length of each segment in the horizontal direction is L times the second period, where the second period is the fiber optic bundle period in the horizontal direction, and N and L are both integers greater than or equal to 1, so that the trace length matches the corresponding fiber optic period, which can reduce the skew to 0 as much as possible. Compared with traditional printed circuit boards, it can effectively suppress the skew of differential lines, and can effectively improve the board material utilization rate of printed circuit boards while improving signal quality.

[0010] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0011] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0012] Figure 1 This invention provides a schematic diagram of a printed circuit board structure according to an exemplary embodiment of the present application. Figure 2 This invention provides a schematic diagram of a printed circuit board structure according to an exemplary embodiment of the present application. Figure 3 This illustration shows a schematic diagram of the overall wiring direction of the first differential line provided in an exemplary embodiment of this application; Figure 4 This illustration shows another schematic diagram of the overall wiring direction of the first differential line provided in an exemplary embodiment of this application; Figure 5 This illustration shows yet another schematic diagram of the overall wiring direction of the first differential line provided in an exemplary embodiment of this application; Figure 6 This invention provides a schematic diagram of a printed circuit board structure according to an exemplary embodiment of the present application. Figure 7 This invention illustrates a schematic diagram of a printed circuit board provided in an exemplary embodiment of this application. Figure 8 This illustration shows another inference diagram of a printed circuit board provided in an exemplary embodiment of this application; Figure 9 This invention provides a schematic diagram of a printed circuit board structure according to an exemplary embodiment of the present application. Figure 10 This invention illustrates a schematic diagram of a printed circuit board provided in an exemplary embodiment of this application. Figure 11 This illustration shows another inference diagram of a printed circuit board provided in an exemplary embodiment of this application; Figure 12 This illustration shows a schematic diagram of the Skew optimization effect provided by an exemplary embodiment of this application; Figure 13 This invention provides a schematic diagram of a printed circuit board structure according to an exemplary embodiment of the present application. Figure 14 This invention provides a schematic diagram of a printed circuit board structure according to an exemplary embodiment of the present application. Figure 15 This illustration shows a schematic diagram comparing the insertion loss of a first differential line and a sinusoidal trace provided in an exemplary embodiment of this application; Figure 16This invention provides a schematic diagram of a printed circuit board structure according to an exemplary embodiment of the present application. Figure 17 This invention provides a schematic diagram of a printed circuit board structure according to an exemplary embodiment of the present application. Figure 18 This invention provides a schematic diagram of a printed circuit board structure according to an exemplary embodiment of the present application. Figure 19 This illustration shows a schematic diagram of a differential line structure provided in an exemplary embodiment of this application; Figure 20 This illustration shows another schematic diagram of a method for manufacturing a printed circuit board according to an exemplary embodiment of this application; Figure 21 A schematic diagram of the structure of an electronic device provided in an exemplary embodiment of this application is shown. Detailed Implementation

[0013] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0014] Figure 1 This application illustrates a printed circuit board according to an exemplary embodiment, comprising: an epoxy fiberglass board 100, the epoxy fiberglass board 100 including horizontally and vertically oriented fiberglass bundles 110, with resin 120 filling the spaces between adjacent fiberglass bundles 110; and a first differential line 200 located on the surface of the epoxy fiberglass board 100, each signal transmission line in the first differential line 200 comprising M segments, where M is an integer greater than or equal to 2. The first differential line 200 includes a first transmission line 210 and a second transmission line 220, the first transmission line 210 and the second transmission line 220 transmitting electrical signals of the same amplitude but opposite directions, for example, assuming the voltage on the first transmission line 210 is +1V, then the voltage on the second transmission line 220 is -1V. Each signal transmission line includes at least two segments, such as... Figure 2 As shown, both the first transmission line 210 and the second transmission line 220 include four segments: the first segment, the second segment, the third segment, and the fourth segment, i.e., M is 4.

[0015] In this embodiment, the overall routing direction of the first differential line 200 can be horizontal or vertical. Optionally, when the overall routing direction of the first differential line 200 is horizontal, the extension line connecting the start and end points of any transmission line in the first differential line is parallel to the axis corresponding to the horizontal direction; or, the intersection angle between the extension line and the axis corresponding to the horizontal direction is less than or equal to 45°. When the overall routing direction of the first differential line 200 is vertical, the extension line connecting the start and end points of any transmission line in the first differential line is perpendicular to the axis corresponding to the horizontal direction; or, the intersection angle between the extension line and the axis corresponding to the horizontal direction is greater than 45° and less than or equal to 90°. For example, as... Figure 3 As shown, the extension of MN is parallel to the axis corresponding to the horizontal direction, therefore the overall wiring direction of the first differential line 200 is horizontal; as Figure 4 As shown, the extension of MN intersects the horizontal axis at an angle γ of 90°, therefore the overall wiring direction of the first differential line 200 is vertical; Figure 5 As shown, the extension of MN intersects the axis corresponding to the horizontal direction, and the intersection angle γ is less than 45°. Therefore, the overall wiring direction of the first differential line 200 is horizontal.

[0016] Wherein, when the overall wiring direction of the first differential line 200 is horizontal, at least two segments in the M segments have unequal angles with the horizontal direction, and the projected length of each segment in the vertical direction is N times the first period, where the first period is the fiber optic bundle period in the vertical direction, and N is an integer greater than or equal to 1. That is, the first differential line consists of at least two segments, and each segment needs to satisfy length and angle constraints. The length constraint is that the projection of the transmission line length in the vertical direction of each segment must be an integer multiple of the fiber optic bundle period in the vertical direction. The angle constraint is that at least two segments in the M segments have unequal angles with the horizontal direction. For example, assuming the angle between each segment and the fiber optic bundle is α, then the number of possible values ​​for α must be greater than or equal to 2. Since the first transmission line 210 and the second transmission line 220 are parallel, only one of them will be used for illustrative purposes below. For example, as shown... Figure 6 As shown, in the second transmission line 220, the first segment makes an angle α1 with the horizontal direction, the second segment makes an angle α2 with the horizontal direction, the third segment makes an angle α3 with the horizontal direction, and the fourth segment makes an angle α4 with the horizontal direction. At least two of α1, α2, α3, and α4 are unequal. (Continue to refer to...) Figure 6The vertical projections of the first and second segments of the second transmission line 220 are L1, and the vertical projections of the third and fourth segments are L2. The period of the vertical fiber bundle, i.e., the first period, is Py, where L1 is 1 times the first period and L2 is 2 times the first period. Therefore, under the constraints of length and angle, the trace length can be matched with the fiber period, thus making the trace lengths of the first transmission line 210 and the second transmission line 220 on the fiber bundle and on the resin consistent, thereby reducing the Skew to as low as possible. The following reasoning is based on the assumption that the fiber lengths and resin lengths of the two transmission lines are equal: (1) In the horizontal direction, for example, such as Figure 7 As shown, the width of the glass fiber bundle is Py1, and the width of the resin is Py2, where Py1 + Py2 = Py. Taking the first segment as an example, draw five auxiliary lines in the vertical direction: y1, y2, y3, y4, and y5. The length of the first transmission line 210 between y1 and y2 is a, and the length of the second transmission line 220 is a'. The length of the first transmission line 210 between y2 and y3 is b, and the length of the second transmission line 220 is b'. The length of the first transmission line 210 between y3 and y4 is c, and the length of the second transmission line 220 is c'. The length of the first transmission line 210 between y4 and y5 is d, and the length of the second transmission line 220 is d'. By the parallelogram rule, we can obtain a = a', b = b', c = c', and d = d'. Since a and a' are both on the glass fiber bundle, their lengths cancel each other out. Since c and c' are both on the resin, their lengths cancel each other out. In triangles ACD and A'C'D', ∠CAD = ∠C'A'D', ∠ADC = ∠A'D'C' = 90°, and CD = C'D'. Therefore, triangles ACD and A'C'D' are congruent. Thus, d + c = b' + c'. Since c = c', d = b', and therefore b = d'. Since d and b' are both on the resin, their lengths cancel each other out. Similarly, since b and d' are both on the fiber bundle, their lengths also cancel each other out. Therefore, in the first segment, the lengths of the fiber bundles covered by the first transmission line 210 and the second transmission line 220 in the horizontal direction are equal, and the lengths of the resin covered are also equal. The reasoning for the other segments is the same as above and will not be repeated here.

[0017] Therefore, the lengths of the fiberglass bundles covered by the first transmission line 210 and the second transmission line 220 in the horizontal direction are equal, and the lengths of the resin covering them are also equal.

[0018] (2) In the vertical direction, for example, such as Figure 8As shown, the width of the fiber optic bundle is Px1, and the width of the resin is Px2. Px1 + Px2 = Px, where Px is the period of the fiber optic bundle in the horizontal direction, i.e., the second period. Taking the first segment as an example, the first transmission line 210 and the second transmission line 220 are parallel. Therefore, AB = A'B', BC = B'C', CD = C'D', DE = D'E', EF = E'F', FG = F'G', and GH = G'H'. It can be seen that in the first segment, the lengths of the fiber optic bundles covered by the first transmission line 210 and the second transmission line 220 in the vertical direction are equal, and the lengths of the resin covered are also equal. The reasoning for other segments is the same as above, and will not be repeated here. Therefore, the lengths of the fiber optic bundles covered by the first transmission line 210 and the second transmission line 220 in the vertical direction are equal, and the lengths of the resin covered are also equal.

[0019] In addition, when the overall wiring direction of the first differential line is vertical, at least two segments in the M segment have unequal angles with the vertical direction, and the projected length of each segment in the horizontal direction is L times the second period, where the second period is the fiber optic bundle period in the horizontal direction, and L is an integer greater than or equal to 1.

[0020] In other words, if the overall routing direction of the first differential line is vertical, each segment also needs to meet length and angle constraints. The length constraint is that the projection of the transmission line length in the horizontal direction in each segment must be an integer multiple of the period of the fiber optic bundle spanning the horizontal direction. The angle constraint is that at least two segments in the M segments must have unequal angles with the vertical direction. For example, assuming the angle between each segment and the fiber optic bundle is β, then the number of values ​​for β must be greater than or equal to 2. Since the first transmission line 210 and the second transmission line 220 are parallel, only one of them will be used as an example in the following description. For example, as shown... Figure 9 As shown, in the second transmission line 220, the first segment makes an angle β1 with the vertical direction, the second segment makes an angle β2 with the vertical direction, the third segment makes an angle β3 with the vertical direction, and the fourth segment makes an angle β4 with the vertical direction. At least two of β1, β2, β3, and β4 are unequal. (Continue to refer to...) Figure 9 The horizontal projections of the first and second segments of the first transmission line 210 are L3, and the horizontal projections of the third and fourth segments are L4. The period of the horizontal fiber bundle, i.e., the first period, is Px, where L3 is 1 times the second period and L4 is 2 times the second period. Therefore, under the constraints of length and angle, the trace length can be matched with the fiber period, thus making the trace lengths of the first transmission line 210 and the second transmission line 220 on the fiber bundle and on the resin consistent, thereby reducing the Skew to 0. The following reasoning is based on the assumption that the fiber lengths and resin lengths of the two transmission lines are equal: (1) In the horizontal direction, for example, such as Figure 10 As shown, the width of the fiberglass bundle is Py1, the width of the resin is Py2, and Py1 + Py2 = Py, where Py is the period of the fiberglass bundle in the vertical direction. Taking the first segment as an example, the first transmission line 210 and the second transmission line 220 are parallel. Therefore, AB = A'B', BC = B'C', CD = C'D', DE = D'E', EF = E'F', FG = F'G', and GH = G'H'. It can be seen that in the first segment, the lengths of the fiberglass bundles covered by the first transmission line 210 and the second transmission line 220 in the horizontal direction are equal, and the lengths of the resin covered are also equal. The reasoning for the other segments is the same as the above reasoning process, and will not be repeated here.

[0021] (2) In the vertical direction, for example, such as Figure 11 As shown, the width of the glass fiber bundle is Px1, and the width of the resin is Px2, where Px1 + Px2 = Px. Taking the first segment as an example, draw five auxiliary lines in the vertical direction: y1, y2, y3, y4, and y5. The length of the first transmission line 210 between y1 and y2 is a, and the length of the second transmission line 220 is a'. The length of the first transmission line 210 between y2 and y3 is b, and the length of the second transmission line 220 is b'. The length of the first transmission line 210 between y3 and y4 is c, and the length of the second transmission line 220 is c'. The length of the first transmission line 210 between y4 and y5 is d, and the length of the second transmission line 220 is d'. By the parallelogram rule, we can obtain a = a', b = b', c = c', and d = d'. Since a and a' are both on the glass fiber bundle, their lengths cancel each other out. Since c and c' are both on the resin, their lengths also cancel each other out. In triangles ACD and A'C'D', ∠CAD = ∠C'A'D', ∠ADC = ∠A'D'C' = 90°, and CD = C'D'. Therefore, triangles ACD and A'C'D' are congruent. Thus, d + c = b' + c'. Since c = c', d = b', and therefore b = d'. Since d and b' are both on the resin, their lengths cancel each other out. Similarly, since b and d' are both on the fiber bundles, their lengths also cancel each other out. Therefore, in the first segment, the lengths of the fiber bundles covered by the first transmission line 210 and the second transmission line 220 in the vertical direction are equal, and the lengths of the resin covered are also equal. The reasoning for the other segments is the same as above and will not be repeated here. Therefore, the lengths of the fiber bundles covered by the first transmission line 210 and the second transmission line 220 in the vertical direction are equal, and the lengths of the resin covered are also equal.

[0022] It is understandable that when external noise or electromagnetic interference acts on the glass fiber bundle, the first and second transmission lines will experience the same interference because they have the same length in the glass fiber bundle. Similarly, when external noise or electromagnetic interference acts on the resin, the first and second transmission lines will experience the same interference because they have the same length in the resin. In other words, external interference will have the same effect on them. Since the receiving end of the first differential line only cares about the voltage difference between the two lines, it can effectively cancel out external noise. For example, if the first transmission line is affected by +0.2V interference, the other transmission line will also be affected by +0.2V interference, and the final voltage difference will remain unchanged. Therefore, the printed circuit board in this embodiment can effectively ensure that the length of the glass fiber bundle covering the first and second transmission lines in the horizontal or vertical direction is equal, and the length of the resin covering them is also equal, so that the effective dielectric constant experienced by the first and second transmission lines is approximately the same. The propagation speed of the signal in the medium can be expressed by the following formula:

[0023] in, Here, C represents the effective dielectric constant of the medium, and C represents the speed of light in a vacuum. Therefore, in this embodiment, the signal propagates at the same speed in the first and second transmission lines, so the transmission time is also the same. The theoretical value of Skew can be 0. For example, as shown... Figure 12 The diagram illustrates the skew optimization effect provided in this embodiment. A skew comparison is made between the PCB provided in this application and a non-rotating PCB and a PCB rotated by 3 degrees. The skew produced by the PCB provided in this embodiment is superior to that produced by the PCB rotated by 3 degrees. Therefore, compared to traditional structures, the PCB provided in this embodiment can reduce skew without rotating the PCB, thereby improving the utilization rate of the PCB material.

[0024] In this embodiment, a printed circuit board is provided, including an epoxy fiberglass board. The epoxy fiberglass board includes fiberglass bundles in the horizontal and vertical directions, with resin filling the spaces between adjacent fiberglass bundles. A first differential line is located on the surface of the epoxy fiberglass board. Each signal transmission line in the first differential line includes M segments, where M is an integer greater than or equal to 2. Wherein, when the overall wiring direction of the first differential line is horizontal, at least two segments in the M segments have unequal angles with the horizontal direction. The projected length of each segment in the vertical direction is N times the first period, where the first period is the length of the fiberglass bundles in the vertical direction. The fiber optic bundle period; or, when the overall routing direction of the first differential line is vertical, at least two segments in segment M have unequal angles with the vertical direction, and the projected length of each segment in the horizontal direction is L times the second period, where the second period is the fiber optic bundle period in the horizontal direction, and N and L are both integers greater than or equal to 1, so that the trace length matches the corresponding fiber optic period, which can reduce the skew to 0 as much as possible. Compared with traditional printed circuit boards, it can effectively suppress the skew of differential lines, and can effectively improve the board material utilization rate of printed circuit boards while improving signal quality.

[0025] Furthermore, if the traces are periodic, resonance may occur, for example, with sinusoidal trace patterns. Therefore, in this embodiment, based on the overall routing direction of the first differential line, the following two implementation methods are proposed to break the periodicity of the traces and thus avoid resonance: (1) In one implementation, when the overall wiring direction of the first differential line is horizontal, the tangent of the angle of the horizontal direction corresponding to each segment is the quotient of a first value and a second value, wherein the first value is the least common multiple of the first period and the second period, and the second value is the projection length of the corresponding segment in the horizontal direction.

[0026] For example, the tangent value can be expressed by the following formula: ; in, This represents the horizontal angle corresponding to each segment, Pm represents the first value, i.e., the least common multiple of the first period and the second period, and S1 represents the projected length of the segment in the horizontal direction. For example, as shown... Figure 13 As shown, taking the first segment of the second transmission line 220 as an example, the projected length of the first segment in the horizontal direction is S.

[0027] (2) In one implementation, when the overall wiring direction of the first differential line is vertical, the tangent of the included angle of the vertical direction corresponding to each segment is the quotient of the first value and the third value, wherein the third value is the projection length of the corresponding segment in the vertical direction.

[0028] For example, the tangent value can be expressed by the following formula: ; in, This represents the horizontal angle corresponding to each segment, Pm represents the first value, i.e., the least common multiple of the first period and the second period, and S2 represents the projected length of the segment in the vertical direction. For example, as shown... Figure 14 As shown, taking the first segment of the second transmission line 220 as an example, the projected length of the first segment in the vertical direction is S2.

[0029] In this embodiment, when the overall wiring direction is horizontal, the periodic change of impedance is disrupted because the angles of each segment in the horizontal direction are not completely equal, thus preventing resonance in the insertion loss. Similarly, when the overall wiring direction is vertical, the periodic change of impedance is also disrupted because the angles of each segment in the vertical direction are not completely equal, preventing resonance in the insertion loss. Furthermore, using the least common multiple of the first and second periods for calculation allows for simultaneous compatibility with both horizontal and vertical fiber optic bundle periods. For example, as... Figure 15 The diagram shown is a comparison of the insertion loss of the first differential line and the sinusoidal trace in this embodiment of the application. Compared with the sinusoidal trace, the insertion loss resonance phenomenon of the first differential line in this embodiment of the application disappears, thereby ensuring that the insertion loss of the differential line does not resonate.

[0030] In one implementation, at least one pair of adjacent segments in the M segments are connected by an arc. For example, as shown... Figure 16 As shown, the first and second segments are connected by an arc. It is understood that during high-speed signal transmission, any sharp angles or uneven line connections can cause signal reflection and distortion, and may also lead to impedance mismatch, further causing signal reflection and loss. Therefore, in this embodiment, the smooth transition between adjacent segments better stabilizes the impedance, thereby improving signal quality.

[0031] In one implementation, if a second difference line exists, the second difference line is connected to the end of the first difference line and forms a target angle with the first difference line.

[0032] It is understood that the second differential line can be a differential line with the same wiring method as the first differential line or a differential line with other wiring methods. In some application scenarios, it may be necessary to convert the differential signal from one transmission medium to another, or to mix the differential signal with other signals for transmission. In this case, splicing the second differential line with the first differential line enables flexible signal transmission, further illustrating that the printed circuit board provided in this application embodiment has compatibility. For example, as shown... Figure 17 As shown, the second difference line is connected to the second segment of the first difference line, and the angle between the first difference line and the second difference line is α3.

[0033] Furthermore, in one implementation, the second differential line is connected to the first differential line by an arc. For example, as shown... Figure 18 As shown, the first and second differential lines are connected by an arc. This smooth connection avoids unnecessary bends, thus reducing the impact on the signal.

[0034] For example, based on the above implementation methods, such as Figure 19 As shown in the embodiment of this application, a differential line is also provided. The PCB containing the differential line uses 1078 fiber optic cable, with a fiber optic bundle period of 18.5 mil in both the horizontal and vertical directions. The first segment of the line has an angle of 3.9 degrees with the horizontal direction, and its projected length in the horizontal direction is 271.4 mil. The second segment of the line has an angle of -3.9 degrees with the horizontal direction, and its projected length in the horizontal direction is 271.4 mil. The third segment of the line has an angle of 3 degrees with the horizontal direction, and its projected length in the horizontal direction is 353.0 mil. The fourth segment of the line has an angle of -3 degrees with the horizontal direction, and its projected length in the horizontal direction is 353.0 mil. The fifth segment of the line has an angle of 5 degrees with the horizontal direction, and its projected length in the horizontal direction is 211.5 mil. The sixth line segment has an angle of -5 degrees with the horizontal direction, and its projected length in the horizontal direction is 211.5 mil; the seventh line segment has an angle of 8 degrees with the horizontal direction, and its projected length in the horizontal direction is 131.6 mil; the eighth line segment has an angle of -8 degrees with the horizontal direction, and its projected length in the horizontal direction is 131.6 mil; the ninth line segment has an angle of 2 degrees with the horizontal direction, and its projected length in the horizontal direction is 529.8 mil; the tenth line segment has an angle of -2 degrees with the horizontal direction, and its projected length in the horizontal direction is 529.8 mil.

[0035] This application also provides an electronic device, including the above-described... Figure 1-19 The printed circuit board described in any one of the above.

[0036] This application also provides a flowchart illustrating a method for manufacturing a printed circuit board, as shown in the embodiments below. Figure 20 As shown, the following steps may be included: S2010: An epoxy fiberglass board is obtained by arranging fiberglass bundles in a first cycle in the horizontal direction and in a second cycle in the vertical direction.

[0037] The space between two adjacent fiberglass bundles is filled with resin.

[0038] S2020: Set the first differential line on the surface of the epoxy fiberglass board according to the target direction.

[0039] Wherein, the first differential line includes M segments, the target direction is the overall wiring direction of the first differential line, when the target direction is horizontal, at least any two segments in the M segments have unequal angles with the horizontal direction, and the projected length of each segment in the vertical direction is N times the first period; or, when the target direction is vertical, at least any two segments in the M segments have unequal angles with the vertical direction, and the projected length of each segment in the horizontal direction is L times the second period, where M is an integer greater than or equal to 2, and N and L are both integers greater than or equal to 1.

[0040] It is understood that the first differential line consists of at least two segments. Each segment in the horizontal and vertical directions must satisfy corresponding length and angle constraints. Specifically, when the target direction is horizontal, the length constraint is that the projection of the transmission line length in each segment onto the vertical direction is an integer multiple of the period of the fiberglass bundle spanning the vertical direction. The angle constraint is that at least two segments in the M segments have unequal angles with the horizontal direction. When the target direction is vertical, the length constraint is that the projection of the transmission line length in each segment onto the horizontal direction is an integer multiple of the period of the fiberglass bundle spanning the horizontal direction. The angle constraint is that at least two segments in the M segments have unequal angles with the vertical direction. By setting the first differential line on the surface of the epoxy fiberglass board according to the above constraints, it is possible to ensure that each transmission line in the first differential line has an equal length of fiberglass bundle and equal length of resin covering it in the horizontal direction, and equal length of fiberglass bundle and equal length of resin covering it in the vertical direction. For the specific reasoning process, please refer to the above. Figures 7-10 The embodiments shown are not described in detail here.

[0041] In this embodiment, an epoxy fiberglass board is obtained by arranging fiberglass bundles in a first cycle in the horizontal direction and then in a second cycle in the vertical direction, wherein resin is filled between adjacent fiberglass bundles. A first differential line is set on the surface of the epoxy fiberglass board according to the target direction. The first differential line includes M segments, with the target direction being the overall routing direction of the first differential line. When the target direction is horizontal, at least two segments in the M segments have unequal angles with the horizontal direction, and the projected length of each segment in the vertical direction is N times the first cycle; or, when the target direction is vertical, at least two segments in the M segments have unequal angles with the vertical direction, and the projected length of each segment in the horizontal direction is L times the second cycle. Here, M is an integer greater than or equal to 2, and N and L are both integers greater than or equal to 1. This ensures that the trace length matches the corresponding fiber optic cycle, which can reduce the skew to as low as possible and achieve a reduction in skew without rotating the PCB. This effectively improves the utilization rate of the printed circuit board material while improving signal quality.

[0042] In one implementation, the method further includes: when the target direction is horizontal, setting the tangent of the included angle of each segment in the horizontal direction to be the quotient of a first value and a second value, wherein the first value is the least common multiple of the first period and the second period, and the second value is the projected length of the corresponding segment in the horizontal direction.

[0043] In one implementation, the method further includes: when the target direction is vertical, setting the tangent of the included angle of each segment in the vertical direction to be the quotient of the first value and the third value, wherein the third value is the projected length of the corresponding segment in the vertical direction.

[0044] In one implementation, the method further includes: when a second differential line is introduced, setting the second differential line to connect to the end of the first differential line and forming a target angle with the first differential line.

[0045] In one implementation, the method further includes: setting the connection between the second differential line and the first differential line to be an arc connection.

[0046] In one implementation, the method further includes setting the connection method of at least one pair of adjacent segments in the M segments to be an arc connection.

[0047] For details regarding the implementation methods mentioned above, please refer to the above. Figures 1-18 The relevant descriptions in the illustrated embodiments will not be repeated here.

[0048] As shown in Figure 2100, this application embodiment also provides an electronic device 2100, including a processor 2110 and a memory 2120. The memory 2120 stores a program or instructions that can run on the processor 2110. When the program or instructions are executed by the processor 2110, they implement the various processes of the above-described printed circuit board manufacturing method embodiment and can achieve the same technical effect. To avoid repetition, they will not be described again here.

[0049] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described printed circuit board manufacturing method and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0050] The processor mentioned above is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0051] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described printed circuit board manufacturing method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0052] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0053] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described printed circuit board manufacturing method, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0054] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0055] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus necessary general-purpose hardware platforms, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions to cause the terminal or network-side device to execute the methods described in the various embodiments of this application.

[0056] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other implementations under the guidance of this application without departing from the spirit and scope of the claims. All of these implementations are within the protection scope of this application.

Claims

1. A printed circuit board, characterized by, include: An epoxy fiberglass board, comprising horizontal and vertical fiberglass bundles, with resin filling the space between adjacent fiberglass bundles; The first differential line is located on the surface of the epoxy fiberglass board. Each signal transmission line in the first differential line includes M segments, where M is an integer greater than or equal to 2. Wherein, when the overall wiring direction of the first differential line is horizontal, at least two segments in the M segments have unequal angles with the horizontal direction, and the projected length of each segment in the vertical direction is N times the first period, where the first period is the fiber optic bundle period in the vertical direction; or, when the overall wiring direction of the first differential line is vertical, at least two segments in the M segments have unequal angles with the vertical direction, and the projected length of each segment in the horizontal direction is L times the second period, where the second period is the fiber optic bundle period in the horizontal direction, where N and L are both integers greater than or equal to 1.

2. The printed circuit board of claim 1, wherein, When the overall routing direction of the first differential line is horizontal, the tangent of the angle in the horizontal direction corresponding to each segment is the quotient of a first value and a second value, wherein the first value is the least common multiple of the first period and the second period, and the second value is the projected length of the corresponding segment in the horizontal direction.

3. The printed circuit board of claim 2, wherein, When the overall routing direction of the first differential line is vertical, the tangent of the included angle of each segment in the vertical direction is the quotient of the first value and the third value, wherein the third value is the projected length of the corresponding segment in the vertical direction.

4. The printed circuit board of claim 1, wherein, In segment M, there is at least one pair of adjacent segments connected by an arc.

5. The printed circuit board of claim 1, wherein, In the presence of a second difference line, the second difference line is connected to the end of the first difference line and forms a target angle with the first difference line.

6. The printed circuit board according to claim 5, characterized in that, The second differential line is connected to the first differential line by an arc.

7. An electronic device, characterized in that, Includes the printed circuit board as described in any one of claims 1-6.

8. A method for manufacturing a printed circuit board, characterized in that, The method includes: An epoxy fiberglass board is obtained by arranging fiberglass bundles in a first cycle in the horizontal direction and in a second cycle in the vertical direction, wherein resin is filled between two adjacent fiberglass bundles. According to the target direction, a first differential line is set on the surface of the epoxy fiberglass board. The first differential line includes M segments. The target direction is the overall wiring direction of the first differential line. When the target direction is horizontal, at least two segments in the M segments have unequal angles with the horizontal direction, and the projected length of each segment in the vertical direction is N times the first period. Or, when the target direction is vertical, at least two segments in the M segments have unequal angles with the vertical direction, and the projected length of each segment in the horizontal direction is L times the second period. Here, M is an integer greater than or equal to 2, and N and L are both integers greater than or equal to 1.

9. The method according to claim 8, characterized in that, The method further includes: when the target direction is horizontal, setting the tangent of the included angle of each segment in the horizontal direction as the quotient of a first value and a second value, wherein the first value is the least common multiple of the first period and the second period, and the second value is the projected length of the corresponding segment in the horizontal direction.

10. The method according to claim 9, characterized in that, The method further includes: when the target direction is vertical, setting the tangent of the included angle of the vertical direction corresponding to each segment to be the quotient of the first value and the third value, wherein the third value is the projection length of the corresponding segment in the vertical direction.

11. The method according to claim 10, characterized in that, The method further includes: when introducing a second differential line, setting the second differential line to be connected to the end of the first differential line and forming a target angle with the first differential line.

12. The method according to claim 11, characterized in that, The method further includes: The connection between the second differential line and the first differential line is set to an arc connection.

13. The method according to claim 8, characterized in that, The method further includes: The connection method for at least one pair of adjacent segments in the M segment is set as an arc connection.

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