A socket shielding sheet, an electrical connection portion, and a socket

Abstract

The application provides a socket shielding sheet, which comprises: shielding groups arranged at intervals, each shielding group comprising a first end electrically connected to a plug, a second end connected to a circuit substrate and extending from the first end in a predetermined direction, and an intermediate part connecting the first end and the second end; the intermediate parts of different shielding groups are located on the same shielding substrate; each intermediate part comprises a plurality of wing parts arranged at intervals in the predetermined direction; the wing parts are formed on the intermediate part, one end of each wing part is fixed to the intermediate part, the other end of each wing part is movable relative to the intermediate part and can be bent to a predetermined height relative to the surface where the intermediate part is located; and the concave space defined by the opposite wing parts and the intermediate part on each two adjacent shielding groups is the base shell of a socket signal group. The shielding sheet has the effects of resisting signal group crosstalk and controlling resonance on a backflow path, and the shielding sheet based on the design is convenient to process and has good consistency between the shielding groups, and thus an electric connection part and a socket comprising the shielding sheet are provided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication equipment, in particular to a socket shielding sheet, an electrical connection part and a socket. BACKGROUND

[0002] Connectors are used to bridge the gap between circuit substrates at blocked or isolated circuits, so as to make the current flow and make the circuit realize the predetermined function. Due to the need for increasing the bandwidth of communication terminals such as switches, routers, modems, user access terminal equipment, the high-speed transmission of connector signals and the signal integrity are required to be higher. In high-speed docking connectors, differential signals are widely used due to their good anti-interference performance. A common backplane connector generally includes signal groups arranged at intervals on an insulating base, shielding groups arranged between adjacent signal groups, and a plurality of shielding groups forming a shielding sheet. Each signal group generally includes two signal terminals, and the signal terminals are differential signal terminals for transmitting differential signals. The shielding groups are used to shield the differential signals transmitted by the adjacent two signal groups, and the shielding groups and the signal groups are arranged alternately, which can shield the transmission signals and provide a return path for the transmission signals.

[0003] With the continuous improvement of signal transmission rate, higher requirements are put forward for the integrity of the transmission signal. In the high-speed electrical performance indicators of the connector, the most critical electrical performance indicators are crosstalk, loss and reflection. In particular, as the rate of the current connector evolves to 56Gbps or even 112Gbps, the problem of crosstalk is particularly prominent. Therefore, the specific design of the shielding group and the shielding sheet is very important.

[0004] In order to solve the problem of crosstalk, the prior art often punches a plurality of rib-shaped protrusions (bumps) on the shielding base along the extension direction of the shielding group, as shown in Figure 1 The signal group is installed in the shielding cavity defined by the adjacent protrusions, so as to isolate the signal interference of the adjacent signal groups. At the same time, since the shielding groups are located on the same shielding base and are in communication with each other, the shielding sheet composed of the shielding groups has good signal return flow. However, the lengths of the protrusions corresponding to different shielding groups are different, and the overall punching process is easy to cause the inconsistency of the heights of the protrusions between different shielding groups, and is easy to cause the stretching of the shielding base near the protrusions, thereby causing the uncertainty of the impedance on the return flow path, causing the fluctuation of the shielding performance, and affecting the transmission performance. In addition, the surface of the shielding sheet is a non-planar undulating surface as a whole, which is not conducive to reducing the self-inductance of the return circuit and is not conducive to controlling the resonance.

[0005] Further, in order to solve the uncertainty caused by the protruding processing technology, the prior art cuts a whole cutting groove extending from the first end to the second end on the shielding substrate along the extension direction of the shielding group, and the cutting groove is lifted to form a baffle-shaped baffle, and the socket signal group is installed in the recess space defined by the adjacent baffles. That is, the protrusions in the prior art are replaced by baffles. Although this scheme can achieve electromagnetic shielding isolation between adjacent socket signal groups, the signals are not connected between adjacent shielding groups, and the single signal return path is not conducive to controlling resonance. Figure 1

[0006] Therefore, for the design of the shielding sheet, the prior art has problems such as inconsistency in the processing technology, weak ability of the shielding sheet to control resonance, few signal return paths of the flat shielding sheet that cannot control resonance, and the signal group shielding cavity and the return current path not being on the same shielding sheet. SUMMARY

[0007] Therefore, the present application proposes a socket shielding sheet based on a flat shielding sheet, which can at least solve the problems mentioned in the prior art.

[0008] In a first aspect, a socket shielding sheet is proposed, which includes: shielding groups arranged at intervals, each shielding group including a first end in electrical contact with a plug, a second end formed by extending the first end in a predetermined direction, and an intermediate portion connecting the first end and the second end, each intermediate portion including a plurality of wing portions arranged at intervals in the predetermined direction, the wing portions being cut from the intermediate portion to have one end fixed on the intermediate portion and the other end separated from the surface of the intermediate portion and bendable to a predetermined height relative to the surface of the intermediate portion, and a recess space defined by the opposite wing portions and the intermediate portion on each adjacent shielding group being used to install a socket signal group.

[0009] In this scheme, on the one hand, the wing portions of the adjacent shielding groups are higher than the surface of the intermediate portion, and the recess space defined by the wing portions and the surface of the intermediate portion is used to install the socket signal group, thereby forming a three-sided shielding structure to shield and isolate adjacent signal groups. The shielding groups are arranged between adjacent signal groups to respectively shield and isolate each signal group from electromagnetic interference, thereby reducing the mutual crosstalk between adjacent signal groups and improving the stability, reliability, and anti-interference ability of the electrical connector during data transmission. On the other hand, the different parts of the intermediate portion that do not form wing portions are connected to each other, and the return current can be switched on different paths formed on the surface of the intermediate portion near the impedance discontinuous region, thereby alleviating the impact of impedance mutation. From the perspective of the circuit, the interconnection of the shielding groups changes the circuit inductance, reduces the inductive mutation suffered by the signal, and thus improves the transmission of the signal, reduces the fluctuation of the insertion loss, and improves the resonance. ​

[0010] Optionally, the first end of the shielding group extends vertically downward to form a second end, and the shielding group is substantially L-shaped.

[0011] Optionally, to increase the path of return current, the return signal does not pass through the shielding substrate in a direction perpendicular to the predetermined direction.

[0012] Optionally, as one embodiment of "not passing through", the wing portion of the middle part of the adjacent shielding group is misaligned in a direction perpendicular to the predetermined direction.

[0013] Optionally, as one embodiment of "not passing through", the length of the wing portion of the middle part of the adjacent shielding group is inconsistent in the direction of the predetermined direction.

[0014] Optionally, the length of the wing portion on the same shielding group is different.

[0015] Further, the maximum length of the wing portion is less than 4mm.

[0016] In a second aspect, an electrical connection part is provided, comprising the shielding sheet of the first aspect and possible embodiments of the first aspect, further comprising a signal group that cooperates with the recess, and an insulating member that cooperates with the signal group, the signal group comprising a first end and a second end formed by extending the first end in the predetermined direction; the signal group is insulated from the shielding substrate.

[0017] Further, to adapt to the transmission of high-frequency signals, the signal group comprises two differential signal pins, and the transmitted signals have opposite polarities.

[0018] Further, the insulating member comprises a plurality of grooves that match the wing portions of the shielding sheet, and the wing portions of the shielding sheet are inserted and fixed in the grooves of the insulating member.

[0019] In a third aspect, a socket is provided, comprising the electrical connection part of the second aspect and possible embodiments of the second aspect, and a base housing, the electrical connection part being arranged in the cavity of the base housing. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A schematic diagram of the prior art protrusion;

[0021] Figure 2 A schematic diagram of the socket and plug of an embodiment of the present application forming a connector;

[0022] Figure 3 A schematic diagram of the socket and plug of an embodiment of the present application forming a connector after plugging;

[0023] Figure 4 A cross-sectional view of the socket and plug of an embodiment of the present application at the mutual matching position;

[0024] Figure 5 for Figure 4 A magnified view of section D in the sectional view;

[0025] Figure 6 This is a schematic diagram of a socket structure according to one embodiment of the present invention;

[0026] Figure 7 for Figure 6 A magnified view of point C in the socket structure diagram;

[0027] Figure 8 This is a schematic diagram of a shielding sheet of the present invention that matches a signal group;

[0028] Figure 9 for Figure 8 A schematic diagram of the other surface of the shielding sheet in the embodiment;

[0029] Figure 10 for Figure 8 Another schematic diagram of the other surface of the shielding sheet in the embodiment;

[0030] Figure 11 for Figure 8 Side view of the shielding sheet in the embodiment;

[0031] Figure 12 This is a schematic diagram of the surface of another shielding sheet of the present invention that matches the signal group;

[0032] Figure 13 for Figure 12 A schematic diagram of the other surface of the shielding sheet in the embodiment;

[0033] Figure 14 for Figure 12 Side view of the shielding sheet in the embodiment;

[0034] Figure 15 For inclusion Figure 8 Schematic diagram of electrical connection part A of the shielding sheet in the embodiment;

[0035] Figure 16 For inclusion Figure 8 Schematic diagram of the electrical connection part A of the shielding sheet in the embodiment;

[0036] Figure 17 For inclusion Figure 12 Schematic diagram of electrical connection part B of the shielding sheet in the embodiment;

[0037] Figure 18 For inclusion Figure 12 Schematic diagram of the electrical connection part B of the shielding sheet in the embodiment;

[0038] Figure 19 For inclusion Figure 12 Side view of the electrical connection portion of the shielding sheet in the embodiment;

[0039] Figure 20 for matching Figure 8 Signal group schematic diagram of the shielding sheet of the embodiment;

[0040] Figure 21 for matching Figure 12 Another signal group schematic diagram of the shielding sheet of the embodiment;

[0041] Figure 22 Schematic diagram of the socket containing the electrical connection part A and the electrical connection part B;

[0042] Figure 23 for Figure 22 Partial enlarged schematic diagram of B of the shielding sheet of the embodiment;

[0043] Figure 24 Comparison diagram of near-end crosstalk of the embodiment of the application with a wing part less than 4mm.

[0044] Explanation of main element symbols:

[0045] Connector 1 Plug 2 Socket 3 Electrical connection 4 Shielding sheet 5 Shielding substrate 50 Shielding group 501 First end of shielding group 5011 Second end of shielding group 5012 Intermediate portion 5013 Wing portion 5014 Cutting groove 5015 Insulating member 60 Signal group 601 First end of signal group 6011 Second end of signal group 6012 Single-ended signal group 602 Base housing 70 Plug shielding device 80 DETAILED DESCRIPTION

[0046] In order to make the purpose, principle, technical scheme and advantages of the application more clear and understandable, the application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are used to explain the application and do not limit the application, as described in the summary part of the application.

[0047] It should be particularly noted that the connection or positional relationship that can be determined according to the text or technical content of the specification is partially omitted or not all the positional change diagrams are drawn for the simplicity of the drawings. The positional change diagrams that are not drawn or omitted are not considered not to be described because they are not explicitly described in the specification. For the simplicity of the description, the description is not repeated one by one when specifically described, and is uniformly described herein.

[0048] The backplane connector described in the application is briefly described below. The backplane connector includes a plug and a socket (or respectively referred to as a "male end" and a "female end"). One side of the socket is connected to a circuit substrate, and the other side is mated with the plug. Specifically, the signal pins inside the socket are mated / contacted with the corresponding signal pins inside the plug. Due to the improvement of transmission rate, a pair of differential signal pins is usually formed by two signal pins, and the signal interference between adjacent differential signal pins needs to be shielded. That is, both the signal interference between the differential signal pins at the plug end and the signal interference between the differential signal pins at the socket end need to be shielded. Therefore, it can be understood that the socket shielding sheet proposed in the application is used to shield the interference between the signal groups at the socket end, and is especially suitable for the connector that uses differential signal pins to transmit signals.

[0049] In addition, as the shielding principle of the shielding sheet, the shielding groups and the differential signal pins need to be staggered, each signal has a return current, thereby avoiding signal interference between the differential signal pins.

[0050] Thus, referring to Figures 8 to 11 For an embodiment of the present application, a socket shielding sheet 5 is provided, comprising: shielding groups 501 arranged at intervals, each of the shielding groups 501 comprising a first end electrically connected to a plug, a second end formed by extending the first end in a predetermined direction, and an intermediate portion 5013 connecting the first end and the second end, each intermediate portion 5013 comprising a plurality of wing portions 5014 arranged at intervals in the predetermined direction, the wing portions 5014 being formed on the intermediate portion 5013, one end of the wing portions 5014 being fixed on the intermediate portion 5013, and the other end being bendable to a predetermined height relative to the surface on which the intermediate portion 5013 is located, the concave space defined by the opposite wing portions 5014 and the intermediate portion 5013 on each adjacent shielding group 501 being used for mounting a socket signal group 601, the concave space can be referred to Figure 19 .

[0051] It can be understood that the predetermined direction of the extension of the first end 5011 of the shielding group is determined by the angle at which the socket is connected to the circuit board. Alternatively, as shown in one connector embodiment, Figures 2 to 4 the connector 1 comprises a plug 2 and a socket 3, the plane on which the side of the socket 3 that is mated with the plug 2 and the side that is connected to the circuit board are perpendicular, that is, the two sides are orthogonal. Thus, in this embodiment, the predetermined direction refers to the extension of the first end 5011 of the shielding group vertically downward and to the left or to the right to form the second end 5012 of the shielding group. On a socket comprising a plurality of shielding sheets 5, the arrangement direction of the second end 5012 of the shielding group is perpendicular to the arrangement direction of the first end 5011 of the shielding group, forming a shielding group 501 in the shape of an L. Further, since the concave space is used to cooperate with the mounting of the signal group 601, that is, the extension direction of the concave space needs to be generally consistent with the direction of the signal group 601 to be cooperated with, and the direction of the signal group 601 needs to avoid straight corners, vias, etc., because such impedance discontinuities are exactly the signal group 601 discontinuities. Therefore, alternatively, as shown in Figure 8 three-section concave space (L1, L2, L3), the included angle between the two adjacent sections is obtuse, or in other embodiments, the predetermined direction of the extension of the first end 5011 of the shielding group to form the second end is an arc. That is, the predetermined direction of the extension of the first end 5011 of the shielding group needs to satisfy the position where the signal group 601 to be cooperated with does not have impedance discontinuity, and all the "predetermined directions" referred to below in the present application are applicable to the description here.

[0052] Specifically, the shielding system in the plug and the socket needs to be interconnected, thereby forming a complete grounding loop. Referring to Figures 2 to 7As shown, in the embodiment, the first end 5011 of each shielding group of the socket is in electrical contact with the plug, and it can be understood that the plug also has corresponding plug shielding devices 80, so that more specifically, as shown in the enlarged view Figure 5 As shown in the enlarged view, the first end 5011 of the shielding group of the socket is electrically connected to the shielding device in the plug, and optionally, the shielding device of the plug has a shape substantially the same as the first end 5011 of the shielding group, and after the plug is inserted into the socket, shielding contacts and signal contacts are formed.

[0053] In this embodiment, reference is made to Figure 11 Since the wing portion 5014 of the adjacent shielding group 501 is higher than the surface on which the middle portion 5013 is located, a recess space defined by the wing portion 5014 and the middle portion 5013 is used to install the signal group 601 of the socket, thereby forming a three-sided shielding structure to shield the crosstalk of the adjacent signal group 601 during high-speed signal transmission.

[0054] It should be noted that the recess space referred to in the present application is a three-sided shielding structure formed by the two adjacent wing portions 5014 as side surfaces and the middle portion 5013 as a solid bottom surface, and the solid bottom surface of the middle portion 5013 is part of the return current return path.

[0055] It is explained here that for a shielding sheet 5, the "middle portion 5013" of different shielding groups 501 is located on the same shielding substrate 50, and the shielding substrate 50 has the same material as the first end 5011 and the second end 5012 of the shielding group. As an example of the structure of the shielding sheet 5, a plurality of first ends 5011 of the shielding group are electrically connected to one side of the vertical surface of the shielding substrate 50, and all the second ends 5012 of the shielding group are electrically connected to the other side of the vertical surface of the shielding substrate 50. In the embodiment of the present application, the first end 5011 of the shielding group, the shielding substrate 50, and the second end 5012 of the shielding group are integrated. For the shielding substrate 50 without the wing portion 5014, the return current of the second end 5012 of the shielding group can flow in any path on the planar shielding substrate 50 and return to the first end 5011 of the shielding group, that is, the solid bottom surface of the aforementioned middle portion 5013 is part of the shielding substrate 50.

[0056] Therefore, the middle portion 5013 described in the present application is only a form for dividing the shielding group 501 for convenient description, and should not be understood as the middle portion 5013 of each shielding group 501 being separated and independent from each other, but should be understood as a region corresponding to the first end 5011 and the second end of the shielding group on the shielding substrate 50. Of course, for the following embodiments introducing the wing portion 5014, the middle portion 5013 should be understood as a region corresponding to the first end 5011, the second end, and the wing portion 5014 of the shielding group on the shielding substrate 50.

[0057] At this time, the recess space referred to in the present application can be understood as a structure of three sides of shielding formed by the opposite wing portions 5014 of two adjacent shielding groups 501 as side surfaces and the shielding substrate 50 as a solid bottom surface. The solid bottom surface of the shielding substrate 50 serves as part of the return current return path.

[0058] Therefore, the interval of the shielding groups 501 can be understood as the interval between the first ends 5011 of the shielding groups, or the interval between the second ends 5012 of the shielding groups, or the interval between the wing portions 5014 of the intermediate portions 5013 of the adjacent shielding groups 501. Since the interval accommodates the socket signal groups 601 matched with the shielding groups 501, in general, the intervals of the shielding groups 501 constituting the same shielding sheet 5 are the same, and the present application does not limit the specific size of the interval, as long as the interval can accommodate the signal groups 601.

[0059] The wing portions 5014 are arranged on the side of the shielding groups 501 facing the signal groups 601. The plurality of wing portions 5014 bent to a predetermined height in the predetermined direction isolate the adjacent signal groups 601 and shield the crosstalk between the adjacent signal groups 601 in the direction A of the plane on which the shielding substrate 50 is located.

[0060] It should be understood that the shielding groups 501 are arranged between the adjacent signal groups 601 to shield and isolate each signal group 601, respectively, to reduce the mutual crosstalk between the adjacent signal groups 601, thereby helping to improve the stability, reliability, and anti-interference ability of the electrical connector during data transmission.

[0061] For the design of the return current path, the portions of the intermediate portions 5013 of different shielding groups 501 that do not form wing portions 5014 are connected to each other. It can be understood that the "portions that do not form wing portions 5014" are the solid shielding substrate 50. The signal current direction is opposite to the return current direction. The socket signal groups 601 are electrically connected to the plug signal groups 601 to transmit signals. The signal current direction is from the transmitting end to the receiving end. In the vicinity of the impedance discontinuous region on the current path, the return current can be switched on different paths formed by the portions of the intermediate portions 5013 that do not form wing portions 5014, thereby alleviating the impact of impedance mutation. The interconnection between the shielding groups 501 changes the inductance of the return current loop, reduces the inductive mutation suffered by the signal, thereby improving the transmission of the signal, reducing the fluctuation of the insertion loss, and improving the resonance.

[0062] For the formation of the wing portion 5014, it can be understood that a cutting groove 5015 is generally formed on the middle portion 5013, and the wing portion 5014 is formed by lifting or bending the cutting groove 5015, one end of which is fixed to the middle portion 5013 or the shielding substrate 50, and the other end is movable relative to the middle portion 5013. The shape of the wing portion 5014 is not particularly limited in the present application, and the shape of the cutting groove 5015 is determined by the shape of the predetermined wing portion 5014. For example, the wing portion 5014 adopts an inverted trapezoid with the upper base fixed and the lower base movable, and the corresponding cutting groove 5015 is a trapezoid with the side where the upper base is located. Alternatively, the wing portion 5014 adopts a rectangle with one side fixed to the shielding substrate 50 and the opposite side movable relative to the shielding substrate 50, and the corresponding cutting groove 5015 is a rectangle with the side where the fixed end is located. Optionally, the height H1 of the wing portion 5014 between different shielding groups 501 relative to the shielding substrate 50 is the same, facilitating batch processing and consistency of shielding effect. Generally, the line connecting the fixed end and the movable end is perpendicular to the shielding surface A where the shielding substrate 50 is located.

[0063] From the perspective of processing technology, along the predetermined direction, punching, wire cutting, or due to the consistent extension direction between the shielding groups 501, a mask is made to etch a cutting groove 5015 of a corresponding shape, and then the wing portion 5014 with one end fixed and the other end movable relative to the shielding substrate 50 is formed by bending. Together with the middle portion 5013, it defines the recessed mounting space of the signal group 601, avoiding crosstalk between adjacent signal groups 601. Further, due to the design and processing technology of the wing portion 5014, compared with the existing stamping process, the processing technology meets higher precision, and the planar processing can well avoid the local stretching of the surface of the shielding substrate 50 to cause impedance discontinuity, and the yield rate is high; the wing portion 5014 between multiple shielding groups 501 has good consistency, specifically, the height of the wing portion 5014 between multiple shielding groups 501 has good consistency, and the processing accuracy of the length of the wing portion 5014 is more accurate. The middle portions 5013 of different shielding groups 501 near the signal group 601 and the intervals between the same shielding group 501 are located on the same plane. It can be understood that the intervals of the wing portion 5014 are all solid parts, and the shielding substrates 50 of adjacent shielding groups 501 are connected through the intervals of the wing portion 5014. Thus, the return current return path is located on the same plane, so that the return current can be switched on different shielding conductor paths, which is beneficial to reduce the loop inductance and reduce the inductive mutation suffered by the signal. The return current of the second end 5012 of the different shielding groups can return to the first end 5011 along the nearest path, and the impedance of each region on the shielding substrate 50 is more controlled, which is beneficial to reduce the insertion loss fluctuation and resonance, thereby improving the transmission of the signal.

[0064] To further control the resonance, the shielding substrate 50 forms more current return paths. Figures 12 to 14In another embodiment of the shielding sheet 5 of this application, optionally, the return signal does not pass through on the plane where the shielding substrate 50 is located, along a path perpendicular to the extending direction of the shielding group 501. Specifically, on the middle portion 5013 of adjacent shielding groups 501, the solid shielding substrate 50 portions between the spaced wings 5014 are not located on the same straight line. See also... Figure 13 In one embodiment, the wings 5014 of adjacent shielding groups 501 can be staggered. For example, in the first shielding group 501, the wings 5014 are bent to form a portion without the shielding substrate 50, and in the second shielding group 501, the corresponding portion includes the shielding substrate 50 at the same position, and so on. On the entire shielding sheet 5, a structure is formed where the wings 5014 of adjacent shielding groups 501 are staggered, forming a tortuous, connected shielding substrate 50. Figure 5 In another embodiment shown, the sizes of the wings 5014 between adjacent shielding groups 501 are inconsistent. It can be understood that "size" here specifically refers to the length of the wings 5014. Figure 13 The symbol L, or more specifically, represents the length of the fixed end of the wing 5014 on the shielding substrate 50. For example, the wing 5014 of the preceding shielding group 501 is twice the length of the wing 5014 of the following shielding group 501, so that along a path perpendicular to the extending direction of the shielding group 501, the portion of the preceding shielding group 501 without the shielding substrate 50 corresponds to the portion of the adjacent wing 5014 of the following shielding group 501 with the shielding substrate 50. In this embodiment, optionally, the shielding groups 501 constituting the shielding sheet 5 are arranged in an alternating pattern where the preceding shielding group 501 contains a larger wing 5014 and the following shielding group 501 contains a relatively smaller wing 5014. Of course, in another embodiment, the lengths of the wing 5014 on the same shielding group 501 are not consistent; optionally, the lengths of the wing 5014 on the same shielding group 501 can also be set to alternate between long and short.

[0065] In this embodiment, the first end 5011 of the shielding group, the middle part 5013 / shielding substrate 50, and the second end 5012 of the shielding group are in the same return network. The return current of the signal needs to pass through this return network. The return signal does not pass through in the direction perpendicular to the predetermined direction, which is equivalent to increasing the number of nodes in the return network, that is, increasing the return path of the return current. This makes all signal pairs have a complete and shortest return path, which can reduce the radiation effect of the electric field, thereby reducing crosstalk between signals and suppressing resonance caused by impedance mismatch.

[0066] Understandable, regardless Figure 8 The shielding sheet in embodiment 5 is still Figure 12The shielding sheet 5 in the embodiment is of the "non-through" form. The shielding substrate 50 forms more current return paths located on the same plane, which helps to reduce the self-inductance of the circuit and makes the instantaneous impedance change faced by the return signal smaller.

[0067] It should be noted that the shielding sheet 5 proposed in this application, by bending the wing 5014 to a predetermined height, achieves electromagnetic isolation between adjacent signal groups 601 along the plane of the shielding substrate 50. Since the wing 5014 is formed on the shielding substrate 50, the portion without the wing 5014 forms multiple paths for the return current located on the same plane, which can improve the impedance discontinuity region on the shielding substrate 50. Furthermore, since the wing 5014 is formed on the shielding substrate 50 through which the return current passes, the position and size of the wing 5014 can be more freely set to form more paths for the return current on the shielding substrate 50. It can be understood that the functions of avoiding crosstalk and controlling resonance between adjacent signal groups 601 in this application are accomplished by the same shielding substrate 50.

[0068] Furthermore, it is understood that the portions of the shielding substrate 50 located on the shielding base plate 50 are not completely connected or completely isolated from each other. For example, since the wings 5014 of the shielding groups 501 on the shielding base plate 50 are spaced apart along a predetermined direction, the shielding base plate 50 at these intervals is partially connected to the adjacent shielding groups 501 and serves as part of the path for the return current. Optionally, the wings 5014 of the same shielding group 501 are spaced equally, which helps to suppress impedance discontinuities.

[0069] Furthermore, it can be understood that since the wing 5014 needs to be spaced out to form a return current path, and regarding the shielding effect, generally, due to the relatively weak enclosure of adjacent signal groups 601, the effect of preventing crosstalk between adjacent signal groups 601 will be reduced. Figure 12 and Figure 13 In embodiments where the size of the wing 5014 is inconsistent, the length of the wing 5014 along the predetermined direction does not exceed 4 mm, which can satisfy both good anti-crosstalk and better control resonance.

[0070] To further illustrate the design of the shielding plate 5 in this application, the following description explains the installation of the shielding plate 5 in conjunction with the signal group 601. See [link to documentation]. Figure 16 or Figure 18 Each of these is a separate application. Figure 8 The shielding plate 5 shown is Figure 12The shielding sheet 5 socket signal group 601 assembly diagram is shown. As shown, the signal group 601 is first combined with the insulating piece 60, which is usually integrally formed by injection molding to form an integral signal group 601; of course, the plastic part with a mating socket for the signal group 601 can also be formed first, and the signal group 601 is attached to the socket to form an integral signal group 601. Then the integral signal group 601 is detachably mounted with the shielding sheet 5. Optionally, the detachable mounting method here includes but is not limited to clamping, inserting, welding and riveting. Preferably, the insulating piece 60 includes a plurality of grooves matched with the wing portion 5014 of the shielding sheet 5, and the wing portion 5014 of the shielding sheet 5 is inserted and fixed on the grooves of the insulating piece 60. It is particularly pointed out that in the prior art, two opposite shielding sheets 5 are used to form a four-sided shielding structure. In order to assemble and fix the shielding sheet 5 with the signal group 601, a flap is usually formed on one of them to assemble and fix the signal group 601. Such a flap scheme considers the assembly and fixation problem, but does not involve or record the implementation of anti-crosstalk.

[0071] Specifically, taking the signal group 601 including two differential signal pins as an example, the differential signal pins in each pair correspond to the three-sided shielding recess space defined by the wing portion 5014 and the middle portion 5013 of the adjacent shielding group 501. The recess space can be seen in Figure 19 , the differential signal pin includes a first end and a second end extending from the first end in a predetermined direction. It can be understood that the extension direction of the first end of the differential signal pin is substantially the same as the extension direction of the first end 5011 of the shielding group. It should be noted that those skilled in the art can understand that from the production process point of view, the shape of the shielding sheet 5 is generally designed according to the shape of the signal group 601, that is, the predetermined direction described in the present application, which can also be understood as the predetermined direction of the first end 6011 of the signal group to be designed. The second end of the shielding sheet 5 is extended.

[0072] For the material of the signal group 601 and the shielding group 501, due to the contact part existing in the first end and the second end of the shielding group 501 and the signal group 601 respectively, a conductive material such as copper alloy can be generally selected. In order to improve its conductivity, in one embodiment, tin or lead-tin plating can be used.

[0073] The first end of the differential signal pin and the first end 5011 of the shielding group are located on the same straight line in the horizontal direction shown in Figure 15 . Correspondingly, the height H2 of the second end 5012 of the shielding group relative to the shielding substrate 50 is consistent with the height H1 of the wing portion 5014 relative to the shielding substrate 50, and the second end of the differential signal pin and the second end 5012 of the shielding group are arranged along the same straight line, or more specifically, in Figure 19The projection in the vertical direction coincides in the side view. Thus, in the horizontal direction and in the vertical direction, the signal interference between adjacent signal groups 601 is isolated by the shielding groups 501 located therebetween.

[0074] For example, the number of the second ends 5012 of the shielding groups matches the number of the second ends 6012 of the signal groups. It can be understood that the term "match" herein means that one signal group second end 6012 is arranged between two shielding group second ends 5012. If the signal group 601 is composed of two differential signal pins as shown in the figure, two second ends of the differential signal pins are arranged between two shielding group second ends 5012. That is, for the present application, regardless of the type or number of the signal pins of the signal group 601, each signal group second end 6012 is necessarily located between two shielding group second ends 5012, that is, each signal group second end 6012 corresponds to two shielding group second ends 5012. Similarly, the number of the first ends 5011 of the shielding groups matches the number of the first ends 6011 of the signal groups.

[0075] It can be understood that the differential signal pins of the differential signal group 601 can transmit two signals, which are close to each other and have equal signal amplitudes. The amplitudes of the coupling electromagnetic fields between the two differential signal pins and the ground line are also equal, and the signal polarities of the two differential signal pins are opposite, and their electromagnetic fields will cancel each other out, so they are more suitable for signal transmission in high-speed circuits.

[0076] Optionally, the width of each shielding group first end 5011 is substantially greater than the width of each differential signal pin first end. The shapes of the first ends of the shielding groups 501 and the differential signal pins, and / or the shapes of the respective second ends are not specifically limited. Optionally, the shielding group second ends 5012 and the signal group second ends 6012 are needle-shaped fisheye structures with elliptical inner walls, which are used to plug the circuit substrate to be connected. The shielding group first ends 5011 and the signal group first ends 6011 are S-shaped elastic contact pieces. Optionally, see Figure 14 The elastic contact piece is an illustrative view thereof, which includes a guide segment, a straight segment, and a staggered segment. The staggered segment is bent to one side relative to the plane on which the shielding substrate 50 is located. The guide segment is used for guiding when the plug is plugged. The straight segment is in electrical contact with the corresponding signal group 601 and shielding group 501 pin in the plug. The staggered segment is used to provide a certain elastic support when plugging.

[0077] As described above, the elastic contact piece is in contact with the corresponding shielding device provided in the plug to form a loop. It can be understood that the shapes of the shielding group first ends 5011 and the signal group first ends 6011 depend on the number of contacts of the plug and the socket. If it is a single-contact contact, the shape of each shielding group first end 5011 and the signal group first end 6011 is flat.

[0078] It should be noted that the signal group 601, which mates with the recessed space, is insulated from the shielding substrate 50 and the wing 5014 within the recessed space; that is, the signal group 601 does not make electrical contact with the shielding substrate 50 or the wing 5014 within the recessed space. For example, the width of the signal group 601 is smaller than the spacing of the wing 5014 between adjacent shielding groups 501. Furthermore, an insulating spacer is provided at the point where the first end 6011 of the signal group mates with the first end 5011 of the shielding group. (See [reference]). Figure 5 This creates a gap between the signal group 601 and the shielding substrate 50. The insulating spacer is part of the aforementioned insulating component 60; that is, the insulating component 60 is pre-set with this spacer during manufacturing, ensuring that the signal group 601 does not make electrical contact with the shielding substrate 50 when installed with the shielding sheet 5. Optionally, if the signal group 601 and the insulating component 60 are integrally injection molded, the signal group 601, except for the first and second ends protruding from the shielding substrate 50 to mate with the plug and circuit board respectively, is entirely enclosed within the insulating component 60. This means that an insulating spacer is always present between the signal group 601 and the shielding substrate 50. This insulating spacer can be suspended from or relative to the shielding substrate 50. It can be understood that due to the presence of the insulating spacer, although the signal group 601 is positioned close to the shielding substrate 50, it is always suspended relative to the shielding substrate 50, meaning there is no electrical contact between them. Furthermore, the signal groups 601 are electrically independent of each other; that is, the signal groups 601 are not interconnected.

[0079] Secondly, an electrical connection part 4 is proposed, including a shielding sheet 5, a signal group 601, and an insulating member 60. The shielding sheet 5 can be configured as follows: Figure 8 The embodiments, or as Figure 12 As shown, or as other possible embodiments of the shielding sheet 5 described in this application. For ease of explanation, see the diagram provided. Figure 8 and Figure 20 The installation formed as follows Figure 15 The schematic diagram of electrical connection part A shown; or by Figure 12 and Figure 21 The installation formed as follows Figure 17 The schematic diagram of electrical connection part B is shown.

[0080] In the embodiment employing differential signal transmission, each differential signal group 601 of electrical connection A and each differential signal group 601 of its corresponding electrical connection B form a differential signal pair. The arrangement of the signal groups 601 has two forms, each corresponding to... Figure 20 as well as Figure 21 And corresponding to Figure 8 , Figure 12 The shielding sheet 5 is assembled. This is understandable. Figure 20 , Figure 21In each embodiment of signal group 601, a single-ended signal group 602 is provided. Specifically, Figure 20 The innermost part contains a single-ended signal group 602. Figure 21 The outermost part has a single-ended signal group 602, which is composed of... Figure 15 The electrical connection A shown is with Figure 17 The electrical connection portion 4 array, composed of electrical connection portions B, is complementary through single-ended signals on both sides. Preferably, in some specific embodiments, the shielding plates 5 of all electrical connection portions A and B in the electrical connection arrays are arranged in the aforementioned "non-through" configuration.

[0081] Therefore, it should be noted that the recessed space between adjacent shielding groups 501 described in this application is used to install signal groups 601. Taking the recessed space as the main body of description, in conjunction with the above description of single-ended signals, not all signal groups 601 are set in the recessed space. That is, not every signal group 601 matches every recessed space, but every recessed space matches every signal group 601.

[0082] It is understood that the shielding group 501 and the signal group 601 on the electrical connection part 4 are arranged alternately, for example, in the form of shielding group 501, signal group 601, shielding group 501, and signal group 601.

[0083] See further details separately. Figure 6 , Figure 7 , Figure 15 and Figure 22 ,or Figure 6 , Figure 7 and Figure 17 and Figure 22 The socket 3 includes at least one electrical connection portion 4 arranged in the same direction and a base housing 70 for accommodating the electrical connection portion 4. The second end 6012 of the signal group and the second end 5012 of the shielding group extend from the bottom edge of the base housing 70 to be plugged into the circuit board.

[0084] Each electrical connection part 4 can be independently plugged into the plug 2 to complete signal transmission. Specifically, the signal group 601 in each electrical connection part 4 is electrically connected to the signal group 601 of the plug to transmit signals, and the shielding group 501 in each electrical connection part 4 is electrically connected to the shielding device of the plug to form a grounding shield. It can be understood that the number of signal groups 601 and shielding groups 501 in the electrical connection part 4 of the socket 3 corresponds to the number of signal groups 601 and shielding devices in the plug, respectively.

[0085] In some embodiments for transmitting differential signals, the aforementioned electrical connection portions 4 are supported and limited by the socket base housing 70, and electrical connection portions A and B are respectively as follows: Figure 22 as well as Figure 23As shown, each electrical connection A and its opposite electrical connection B form a differential electrical connection 4. It should be understood that the differential signal pairs can be aligned or staggered; the aligned means that the differential signal pins of the electrical connection A and the electrical connection B in the differential electrical connection 4 correspond to each other in the direction of the arrangement shown, and the staggered means that the differential signal pins of the electrical connection A and the electrical connection B in the differential electrical connection 4 have a certain staggered distance in the direction of the arrangement shown, for example, the differential signal pin of the electrical connection A at the same position in the direction of the arrangement corresponds to part of the differential signal pin and part of the shielding group 501 of the electrical connection B. Generally speaking, the differential signal pairs arranged in the staggered manner are less affected by near-end crosstalk and far-end crosstalk, but considering the space limitation and the influence of the surrounding differential signal pairs on a certain differential signal pair, the distance of the staggering is not the larger the better, and needs to be set according to the specific situation. As an embodiment of the staggered arrangement: only one differential signal pin in each differential signal pair of the opposite electrical connection A and the electrical connection B is opposite in the direction of the arrangement, and the other differential signal pin of the one electrical connection 4 is opposite to the first end 5011 of the shielding group of the other electrical connection 4; of course, for those skilled in the art, the specific staggered distance of the differential signal pins located in different electrical connections 4 constituting the differential electrical connection 4 can be set according to the actual situation.

[0086] The base shell 70 can be formed by mold injection, and the material of the socket base shell 70 and the insulating piece 60 of the electrical connection 4 depends on the connection mode of the socket and the circuit board (back plate or single plate), for example, the socket is welded by surface mount technology (SMT), that is, all the second ends 5012 of the shielding groups and the second ends 6012 of the signal groups are welded to the circuit board, and the heat resistance of the base shell 70 and the insulating piece 60 is required to be higher, and a crystalline material such as liquid crystal polymer (LCP) can be used. Or because it is difficult to form a large block of heat-resistant soldering area, a pressing method can be used. Optionally, considering the cost, the socket base shell 70 and the insulating piece 60 of the electrical connection 4 can use a crystalline high-grade engineering plastic, for example, SPS (polystyrene with a position).

[0087] The socket 3 includes multiple electrical connection parts 4. Different electrical connection parts 4 can have different signal connection methods. That is, the electrical connection parts 4 arranged on the socket base housing 70 are not required to be completely identical. Therefore, different electrical connection parts 4 may have different numbers of signal group second ends 6012, and thus may have different numbers of shield group second ends 5012. In other words, the number of signal groups 601 and / or shield groups 501 contained in each electrical connection part 4 is different. Correspondingly, the number of recessed spaces formed between the shield groups 501 for mounting the signal groups 601 can also be different. Thus, although the electrical connection parts 4 are arranged in one direction on the socket base housing 70, the arrangement of the recessed spaces of adjacent electrical connection parts 4 may be staggered; or the recessed spaces for mounting the signal groups 601 on different electrical connection parts 4 are the same, but the recessed spaces of adjacent electrical connection parts 4 are staggered in the arrangement direction. For example, the differential electrical connection parts 4 composed of electrical connection parts A and electrical connection parts B described above adopt an embodiment of interleaved differential signal pairs. For example, without considering the single-ended signal pins of the differential signal pair, the first electrical connection part 4 includes two signal groups 601 and three shielding groups 501, while the second electrical connection part 4 includes five signal groups 601 and six shielding groups 501; or different electrical connection parts 4 having the same number of shielding groups 501 and signal groups 601, but in different positions.

[0088] Optionally, the socket 3 includes the same electrical connection part 4, and the number of signal group 601 and shield group 501 and their distribution position on the electrical connection part 4 are the same. Thus, the number of corresponding shield group 501, signal group first end 6011 and shield group 501 and signal group second end 6012 are the same and their distribution positions are the same, forming shield group 501 and signal group 601 arranged in the same straight line.

[0089] It should be understood that if a single signal terminal or multiple signal terminals are used in actual applications, the shielding structure and electrical connector structure provided in the embodiments of this application can also be applied.

[0090] like Figure 24 As shown, the dark curve represents the near-end crosstalk of two pairs of differential signals when used with the shielding plate 5, which is less than 4 mm long, in the wing 5014. The light curve represents the near-end crosstalk of two pairs of differential signals when used with the shielding plate 5, which is 5 mm long, in the wing 5014. Within the 0–20 GHz frequency range, the dark curve generally exhibits less crosstalk than the light curve, demonstrating superior shielding performance. This effectively ensures the bandwidth and quality of signal transmission, making it more suitable for transmission speeds of 56 Gbps and above.

[0091] It is worth noting that in the above embodiments, each module included is only divided according to functional logic, but is not limited to the above division, as long as the corresponding function can be realized; in addition, the specific name of each functional unit is only for the convenience of mutual differentiation, and does not serve to limit the protection scope of the present application.

[0092] Also, the terms "horizontal", "vertical", and the like with respect to directionality are only for the convenience of describing the relative positions between the components of the present application, and do not constitute a limitation on the present application.

[0093] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A socket shielding sheet, characterized in that, Comprising: shielding groups arranged at intervals, each of the shielding groups comprising a first end in electrical contact with a plug, a second end formed by extending the first end in a predetermined direction to connect with a circuit substrate, and an intermediate portion connecting the first end and the second end; the intermediate portions of different shielding groups are located on the same shielding substrate; each intermediate portion comprises a plurality of wing portions arranged at intervals in the predetermined direction; the wing portions are formed on the intermediate portion, one end of the wing portions is fixed to the intermediate portion, and the other end is bent to a predetermined height from and opposite to the surface on which the intermediate portion is located; a recess space defined by the opposite wing portions and the surface on which the intermediate portion is located on each of two adjacent shielding groups is used to accommodate a socket signal group; on the shielding substrate, return signals do not pass in a direction perpendicular to the predetermined direction; in the direction perpendicular to the predetermined direction, the wing portions of the intermediate portions of adjacent shielding groups are misaligned.

2. The socket shield of claim 1, wherein, the first end of the shielding group extends vertically downward and forms the second end, and the shielding group is substantially L-shaped.

3. The socket shield of claim 1, wherein in the direction perpendicular to the predetermined direction, the wing portions of the intermediate portions of adjacent shielding groups are of different lengths.

4. The socket shield of claim 1, wherein, the wing portions on the same shielding group are of different lengths.

5. The socket shield of claim 1 or 3 or 4, wherein, the maximum length of the wing portions is less than 4 mm.

6. An electrical connection, characterised in that The socket shielding sheet as claimed in claim 5 further comprises a signal group cooperating with the recess space, and an insulating member cooperating with the signal group, the signal group comprises a first end, and a second end formed by extending the first end in the predetermined direction; the signal group is insulated from the shielding substrate.

7. The electrical connection of claim 6, wherein The signal group comprises two differential signal pins, and the transmitted signals are of opposite polarities.

8. A backplane connector jack, comprising: The socket shielding sheet comprises at least one electrical connection portion as claimed in claim 6, and a base housing for accommodating the electrical connection portion.

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