A three-sided shielded low crosstalk high speed electrical connector

Abstract

The application provides a three-side shielding low crosstalk high-speed electric connector, belonging to the field of digital information transmission. The socket connector and the plug connector both comprise a base, a first type substrate and a second type substrate; the first type substrate and the second type substrate are both provided with signal terminals and ground terminals, and adjacent signal terminals are arranged as a pair of differential signal pairs; signal pins and ground pins form a pin crimping area; signal contacts and ground contacts form a mutual matching area; in the pin crimping area, a ground pin is arranged on both sides of the signal pin of the differential signal pair, and any two ground pins are not adjacent to each other; in the mutual matching area, the ground contacts are arranged in pairs; a pair of ground contacts are arranged on both sides of the signal contact of each pair of differential signal pairs; the first type substrate and the second type substrate are staggered by one terminal position in the pin arrangement of the pin crimping area and the contact arrangement of the mutual matching area. The application can suppress crosstalk between signals and improve signal transmission quality.

Description

Technical Field

[0001] This invention belongs to the field of digital information transmission technology, and in particular relates to a high-speed electrical connector with three-sided shielding and low crosstalk. Background Technology

[0002] With the continuous increase in the transmission rate of electronic devices, higher demands are placed on the signal integrity of electrical connectors, which are key interface components for achieving high-speed and reliable transmission of digital information in high-speed data communication systems. High-speed electrical connectors need to effectively suppress mutual interference between signals and maintain good impedance matching when transmitting differential signals. Traditional connectors typically use grounding terminals around the signal terminals for shielding, but this shielding is often insufficient, especially when terminals are densely arranged. Significant crosstalk can still occur between adjacent differential pairs and between the positive and negative terminals of the same differential signal pair. Furthermore, the positioning accuracy, contact stability, and shielding structure design of the terminals themselves directly affect the transmission quality of high-frequency signals during the connector mating process.

[0003] Currently, there are various commercial electrical connector products on the market that support high-speed transmission, with designed transmission rates reaching 25Gbps or even 40Gbps. These products have made significant progress in improving signal rate and density, but when facing higher frequencies, more demanding electromagnetic environments, and lower crosstalk requirements, their shielding structure comprehensiveness, terminal layout optimization, and overall signal integrity are still lacking, making it difficult to meet the application needs of high-speed interconnection. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to provide a high-speed electrical connector with three-sided shielding and low crosstalk, which can suppress crosstalk between signals and improve signal transmission quality.

[0005] The present invention provides a high-speed electrical connector with three-sided shielding and low crosstalk, comprising a socket connector and a plug connector that cooperate with each other, wherein the socket connector and the plug connector each include a base, a first type of substrate and a second type of substrate;

[0006] The base is provided with a first and a second receiving groove arranged side by side and staggered;

[0007] The first type of substrate is installed in the first receiving groove, and the second type of substrate is installed in the second receiving groove;

[0008] Both the first type of substrate and the second type of substrate are provided with signal terminals and ground terminals, and adjacent signal terminals are configured as a differential signal pair; the signal terminal has a signal pin and a signal contact; the ground terminal has a ground pin and a ground contact; the signal pin and the ground pin form a pin crimping area; the signal contact and the ground contact form a mating area;

[0009] In the pin crimping area, a ground pin is arranged on both sides of the signal pin of the differential signal pair, and any two ground pins are not adjacent to each other;

[0010] In the mating region, the grounding contacts are arranged in pairs; a pair of grounding contacts are arranged on both sides of the signal contact of the differential signal pair.

[0011] The first type of substrate and the second type of substrate are both staggered by one terminal position in the pin arrangement of the pin crimping area and the contact arrangement of the mating area.

[0012] Furthermore, the signal contact of the first type substrate or the second type substrate and the ground contact of the adjacent second type substrate or the first type substrate at least partially overlap in projection on the vertical plane of the arrangement direction of the first and second receiving slots.

[0013] Furthermore, the first type of substrate is a socket substrate A or a plug substrate A, the pin arrangement of the first type of substrate is SGSSG…GSSG, and the contact arrangement is SGGSSGG…GGSSGG;

[0014] The second type of substrate is a socket substrate B or a plug substrate B, and the pin arrangement of the second type of substrate is GSSG…GSSGS, and the contact arrangement is GGSSGG…GGSSGGS;

[0015] Where S represents signal and G represents ground.

[0016] Furthermore, the center distance between adjacent signal contacts and ground contacts is not less than the center distance between two adjacent signal contacts, and the center distance between two adjacent signal contacts is greater than the center distance between two adjacent ground contacts.

[0017] Furthermore, both the first type of substrate and the second type of substrate include metal terminals, a plastic substrate, and a shielding sheet;

[0018] The metal terminal includes the grounding terminal and the signal terminal; the grounding terminal includes a grounding eye, a middle part of the grounding terminal, and a grounding terminal mating area; the signal terminal includes a signal eye, a middle part of the signal terminal, and a signal terminal mating area; the middle part of the grounding terminal is provided with a hollow slot;

[0019] The plastic substrate covers the surface of the metal terminal;

[0020] The shielding sheet has an opening corresponding to the hollow slot, and the opening has a window locking point that bends towards the hollow slot; the shielding sheet is connected to the hollow slot through the window locking point.

[0021] Furthermore, the socket substrate A has a first plastic substrate, and the socket substrate B has a second plastic substrate; the first plastic substrate and the second plastic substrate have a cutout on the side away from the metal terminal that is aligned with the center of the differential signal pair, and the cutout has a plastic rib.

[0022] Furthermore, the first plastic substrate and the second plastic substrate are provided with ribs between the signal terminal with the shorter length in the differential signal pair and the adjacent ground terminal; the surface of the plastic portion between the differential signal pairs and the surface of the plastic portion between the signal terminal with the longer length in the differential signal pair and the adjacent ground terminal are flush with the surface of the metal terminal.

[0023] Furthermore, the socket substrate A has a first shielding sheet, and the socket substrate B has a second shielding sheet; the outer sides of the first shielding sheet and the second shielding sheet are also provided with edge locking points, and the plastic substrate is provided with a locking groove that mates with the edge locking points.

[0024] Furthermore, the front contours of the signal contact and the ground contact are trapezoidal, with the root width being greater than the head width.

[0025] Furthermore, the signal contact and the grounding contact have the same side shape; from the root to the head, they sequentially include a sliding part, a transition part, a contact part, and a short stake part; the sliding part is a plane, the transition part is a smooth arc surface, the contact part is an outwardly convex contact surface, and the short stake part is a plane.

[0026] Furthermore, the mating areas of the socket connector and the plug connector are centrally symmetrical, and during the mating process, the contacts of both sides simultaneously come into contact with the corresponding sliding parts.

[0027] Furthermore, the socket base is provided with a positioning groove, and the plug base is provided with a guide post corresponding to the positioning groove.

[0028] The positioning groove has a rectangular cross-section and is symmetrically arranged on two surfaces parallel to the X direction, with a chamfer at the opening; the X direction is the arrangement direction of the first and second receiving grooves.

[0029] Furthermore, the guide post has a primary guide surface, a secondary guide surface, a primary positioning surface, and a secondary positioning surface in both the X and Y directions; the positioning groove has a chamfer that mates with the primary guide surface and the secondary guide surface, and a sidewall that mates with the primary positioning surface and the secondary positioning surface.

[0030] The Y direction is a direction perpendicular to the X direction on a plane perpendicular to the mating direction of the socket connector and the plug connector.

[0031] Furthermore, the socket connector also includes:

[0032] A socket cover, wherein the socket cover is provided with cover holes corresponding to each pin of the pin crimping area;

[0033] A socket clip, located between the first type of substrate and the second type of substrate, is used to fix the first type of substrate and the second type of substrate within the socket base.

[0034] The high-speed electrical connector with three-sided shielding and low crosstalk provided by this invention has the following beneficial effects: by defining the pins of the pin area as SGSSG…GSSG or GSSG…GSSGS, and the contact definitions of the mating area as SGGSSGG…GGSSGG or GGSSGG…GGSSGGS, combined with the staggered mounting of two types of substrates and the arrangement of the shielding sheet, each differential signal pair forms effective grounding shielding on both sides and in the direction perpendicular to the substrate plane. The vertical shielding is achieved collaboratively by two parts: first, a large-area metal shielding sheet covering the back of the substrate, which constitutes the main vertical shielding surface; second, the overlapping layout of the projections of the contacts and signal contacts between adjacent substrates, which optimizes the horizontal shielding continuity and, together with the shielding sheet, forms a three-dimensional shielding cavity surrounding the signal line. This structure achieves three-sided shielding, significantly reducing far-end crosstalk between adjacent differential pairs within the same substrate and common-mode noise between the positive and negative terminals of the same differential signal pair.

[0035] The terminals of the two substrates are staggered by one position, and the signal contacts and ground contacts of adjacent substrates at least partially overlap in projection. This further enhances the isolation of signal paths between different substrates and effectively suppresses crosstalk in the side-by-side direction.

[0036] The shielding sheet is embedded into the hollow slot of the grounding terminal through the windowed locking point, which realizes a stable electrical connection and mechanical fixation between the shielding sheet and the grounding terminal, reduces the impedance of the signal return path, and ensures the continuity and reliability of the shielding effect.

[0037] The perforations on the plastic substrate reduce the plastic medium near the signal path, thus reducing medium loss. The ribs ensure the rigidity and strength of the substrate, as well as good plastic flowability during the injection molding process.

[0038] The trapezoidal profile of the contacts and the segmented side design of the sliding, transition, contact, and short post, combined with the centrally symmetrical design of the socket and plug contacts, ensure smooth, stable, and reliable contact during mating. Two-stage guiding and multi-positioning surface guide posts, in conjunction with positioning grooves, provide high-precision mating guidance and positioning, guaranteeing accurate alignment of numerous contacts and improving the connector's durability. Attached Figure Description

[0039] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0040] Figure 1 This is a three-dimensional view of the overall structure of this application;

[0041] Figure 2a A 3D view of the socket substrate for a socket connector;

[0042] Figure 2b A 3D view of the socket sheath for a socket connector;

[0043] Figure 2c A 3D view of the socket clip of a socket connector;

[0044] Figure 2d A perspective view of the socket base for a socket connector;

[0045] Figure 3 This is a three-dimensional view of the socket connector substrate A;

[0046] Figure 4a A three-dimensional view of the first plastic substrate of the socket connector substrate A;

[0047] Figure 4b A perspective view of the first metal terminal of substrate A of the socket connector;

[0048] Figure 4c A perspective view of the first shielding sheet of substrate A of the socket connector;

[0049] Figure 5 This is a 3D view of the socket connector substrate B;

[0050] Figure 6aA three-dimensional view of the first plastic substrate of the socket connector substrate B;

[0051] Figure 6b A perspective view of the first metal terminal of the socket connector substrate B;

[0052] Figure 6c A perspective view of the first shielding plate of substrate B in the socket connector;

[0053] Figure 7a A three-dimensional view of the plug base of the plug connector;

[0054] Figure 7b A 3D view of the plug substrate of the plug connector;

[0055] Figure 8a This is a perspective view of the third shielding plate of the plug connector substrate A;

[0056] Figure 8b This is a perspective view of the third metal terminal of the plug connector substrate A;

[0057] Figure 8c This is a three-dimensional view of the third plastic substrate of plug connector substrate A;

[0058] Figure 9a This is a perspective view of the fourth shielding plate of the plug connector substrate B;

[0059] Figure 9b This is a perspective view of the fourth metal terminal of the plug connector substrate B;

[0060] Figure 9c This is a three-dimensional view of the fourth plastic substrate of plug connector substrate B;

[0061] Figure 10 This is a front view of the contacts on substrate A of the plug connector;

[0062] Figure 11 This is a front view of the contacts on the substrate B of the plug connector;

[0063] Figure 12 A plan view of adjacent pins in each column of the connector pin crimping area;

[0064] Figure 13 A front view of the grounding contact in the mating area;

[0065] Figure 14 A front view of the signal contacts in the mating area;

[0066] Figure 15 A side view of the contacts in the mating area;

[0067] Figure 16 A front view of the mating contact area of ​​adjacent substrates;

[0068] Figure 17a This is the front view of the guide post;

[0069] Figure 17b This is a side view of the guide post.

[0070] In the picture:

[0071] 10-Socket connector;

[0072] 11-Socket sleeve; 111-Sleeve hole;

[0073] 12-Socket clip; 121- Clip locking part;

[0074] 13-Socket substrate A; 131-First metal terminal, 1311-First grounding fisheye, 1312-Middle part of the first grounding terminal, 1313-Matching area of ​​the first grounding terminal, 1314-First signal fisheye, 1315-Middle part of the first signal terminal, 1316-Matching area of ​​the first signal terminal, 1317-First hollow slot; 132-First plastic substrate, 1321-Surface of the plastic part between the first differential signal pairs, 1322-First rib, 1323-Surface of the plastic part between the first longer signal terminal and the grounding terminal, 1324-First hollow, 1325-First plastic rib, 1326-First slot; 133-First shielding sheet, 1331-First edge locking point, 1332-First window, 1333-First window locking point; 134-Snap-fit ​​part; 135-Pin array;

[0075] 14-Socket substrate B; 141-Second metal terminal, 1411-Second grounding fisheye, 1412-Second grounding terminal middle part, 1413-Second grounding terminal mating area, 1414-Second signal fisheye, 1415-Second signal terminal middle part, 1416-Second signal terminal mating area, 1417-Second hollow slot; 142-Second plastic substrate, 1421-Surface of plastic part between second differential signal pairs, 1422-Second rib, 1423-Surface of plastic part between second longer signal terminal and grounding terminal, 1424-Second hollow, 1425-Second plastic rib, 1426-Second slot; 143-Second shielding sheet, 1431-Second edge locking point, 1432-Second window, 1433-Second window locking point;

[0076] 15-Socket base; 151-Socket base receiving groove A; 152-Socket base receiving groove B; 153-Positioning groove; 154-Chamfer; 155-X-direction positioning surface; 156-Y-direction positioning surface;

[0077] 20-Plug Connector;

[0078] 21-Plug base; 211-Plug receiving groove A, 212-Plug receiving groove B, 213-Guide post;

[0079] 22-Plug base A; 221-Third metal terminal, 2211-Third grounding fisheye, 2212-Middle part of third grounding terminal, 2213-Matching area of ​​third grounding terminal, 2214-Third signal fisheye, 2215-Middle part of third signal terminal, 2216-Matching area of ​​third signal terminal, 2217-Third hollow slot; 222-Third plastic base, 223-Third shielding sheet, 2232-Third window, 2233-Third window locking point;

[0080] 23-Plug base plate B; 231-Fourth metal terminal, 2311-Fourth grounding fisheye, 2312-Middle part of fourth grounding terminal, 2313-Matching area of ​​fourth grounding terminal, 2314-Fourth signal fisheye, 2315-Middle part of fourth signal terminal, 2316-Matching area of ​​fourth signal terminal, 2317-Fourth hollowed-out slot; 232-Fourth plastic base plate; 233-Fourth shielding plate, 2332-Fourth window, 2333-Fourth window locking point;

[0081] 30-Socket printed circuit board;

[0082] 40-Plug Printed Circuit Board;

[0083] 2001 - Grounding contact head, 2002 - Grounding contact root, 2003 - Signal contact head, 2004 - Signal contact root, 2005 - Sliding part, 2006 - Transition part, 2007 - Contact part, 2008 - Short pile part, 2009 - Y-direction primary guide surface, 2010 - Y-direction primary positioning surface, 2011 - Y-direction secondary guide surface, 2012 - Y-direction secondary positioning surface, 2013 - X-direction primary guide surface, 2014 - X-direction primary positioning surface, 2015 - X-direction secondary guide surface, 2016 - X-direction secondary positioning surface;

[0084] Ground pin 3001, signal pin 3002. Detailed Implementation

[0085] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. The principles and features of the present invention are described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The embodiments given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0086] like Figure 1As shown, the present invention provides a high-speed electrical connector with three-sided shielding and low crosstalk, mainly comprising a socket connector 10 and a plug connector 20 that are mutually mated. Before use, the pin crimping areas of the plug connector 20 and the pin crimping areas of the socket connector 10 need to be soldered or crimped to the corresponding plug printed circuit board 40 and socket printed circuit board 30, respectively. Subsequently, by interlocking the socket connector 10 and the plug connector 20, electrical connection of the corresponding circuit networks between the two printed circuit boards can be achieved.

[0087] like Figures 2a-2d As shown, the socket connector 10 mainly consists of a socket base 15, a socket sleeve 11, a socket clip 12, a first type of substrate, and a second type of substrate. In this embodiment, the first type of substrate is the socket substrate A13, and the second type of substrate is the socket substrate B14.

[0088] The socket base 15 has two positioning grooves 153 on each of its front and rear sides, parallel to the X-direction, for a total of four. The positioning groove 153 has a square cross-section, with a chamfer 154 at the opening, approximately 0.5 mm in size, and a distance of at least 3 mm from the opening to the bottom. The positioning groove 153 has an internal side for X-direction positioning and a side for Y-direction positioning, both with a depth of at least 4 mm to ensure sufficient guiding and positioning stroke. The X-direction is the arrangement direction of the first type of substrate and the second type of substrate, and the Y-direction is the direction perpendicular to the X-direction on a plane perpendicular to the mating direction of the socket connector 10 and the plug connector 20.

[0089] The socket base 15 is provided with socket base receiving grooves A151 and B152 arranged side by side and staggered. Socket base A13 and socket base B14 are inserted into socket base receiving grooves A151 and B152 respectively at intervals.

[0090] The socket sleeve 11 has multiple rows of sleeve holes 111. During assembly, the pins of the substrate need to be aligned with the sleeve holes 111, and then the socket sleeve 11 is pressed into place to provide physical protection and support for the pins.

[0091] The latching part 121 of the socket latch 12 is inserted into the gap between the socket base A13 and the socket base B14, thereby further fixing the two bases in the socket base 15 and preventing them from loosening.

[0092] like Figure 3 as well as Figures 4a-4c As shown, the socket substrate A13 consists of three parts: a first metal terminal 131, a first plastic substrate 132, and a first shielding sheet 133.

[0093] The first metal terminal 131 includes multiple ground terminals and multiple signal terminals. The ground terminals include a first grounding fisheye 1311 (located in the pin crimping area), a middle portion 1312, and a mating area portion 1313 (located in the mating area, forming a ground contact). The multiple first grounding fisheyes 1311 and the first signal fisheye 1314 together form a pin array 135. The signal terminals include a first signal fisheye 1314 (located in the pin crimping area), a middle portion 1315, and a mating area portion 1316 (located in the mating area, forming a signal contact). Two adjacent signal terminals located between two ground terminals constitute a differential signal pair, each differential signal pair having a shorter signal terminal.

[0094] On the middle portion 1312 of the first grounding terminal, a plurality of first hollow slots 1317 are provided at approximately equal intervals.

[0095] The pin crimping area mates with the vias on the printed circuit board to transmit signals to the printed circuit board; the mating areas mate with each other to transmit signals from one end of the connector to the other.

[0096] By using an inlay injection molding process, a first plastic substrate 132 is wrapped around the surface of the first metal terminal 131, serving to provide insulation, support, and fixation. Between the shorter signal terminal in the differential signal pair and its adjacent ground terminal, a raised first rib 1322 is formed on the first plastic substrate 132 to provide additional support and isolation.

[0097] The plastic surface 1321 between the first differential signal pairs and the plastic surface 1323 between the first longer signal terminal and the ground terminal are substantially flush with the surface of the first metal terminal 131.

[0098] During the design process, signal terminals that are physically closer to the center and have a more direct path (i.e., shorter signal terminals) are assigned to longer or more convoluted wiring paths; while signal terminals that are physically further out and have a more circuitous path (i.e., longer signal terminals) are assigned to shorter or simpler wiring paths.

[0099] On the back side of the first plastic substrate 132 (the side away from the terminal contact surface), a plurality of first cutouts 1324 are provided. The centers of these first cutouts 1324 are substantially aligned with the centers of each differential signal pair. First plastic ribs 1325 are provided inside the first cutouts 1324 to facilitate the flow of plastic during injection molding.

[0100] The first plastic substrate 132 is provided with a first snap-fit ​​part 134 for engaging with the socket snap-fit ​​12, and a first slot 1326 for engaging with the shielding sheet.

[0101] The first shielding plate 133 is a flat metal plate that covers the front of the first plastic substrate 132, covering the area directly above the surface of each grounding terminal of the socket. The first shielding plate 133 has multiple first openings 1332, whose positions correspond vertically to the first hollowed-out slots 1317 on the grounding terminals. Within each first opening 1332, a downward-facing first opening locking point 1333 is formed by stamping and bending, with the first opening locking points 1333 spaced 1mm to 2mm apart. The outer edge of the first shielding plate 133 also has multiple outwardly bent first edge locking points 1331.

[0102] The assembly of the first shielding plate 133 is divided into two steps: first, the first edge locking point 1331 is embedded into the first slot 1326 of the first plastic substrate 132 for pre-positioning; then, the first window locking point 1333 is pressed into and locked into the first hollow slot 1317 of the first grounding terminal, so as to achieve interference fit and reliable electrical connection between the first shielding plate 133 and all grounding terminals.

[0103] like Figure 5 as well as Figures 6a-6c As shown, the structure of the socket substrate B14 is similar to that of the socket substrate A13, and it is also composed of a second metal terminal 141, a second plastic substrate 142, and a second shielding sheet 143.

[0104] The second metal terminal 141 includes a second grounding fisheye 1411 (pin area), a second grounding terminal middle portion 1412 with a second hollowed-out slot 1417, a second grounding terminal mating area portion 1413 (mating area), a second signal fisheye 1414, a second signal terminal middle portion 1415, and a second signal terminal mating area portion 1416.

[0105] The second plastic substrate 142 has a second rib 1422. The plastic surface 1421 between the second differential signal pairs and the plastic surface 1423 between the second longer signal terminal and the ground terminal are substantially flush with the surface of the second metal terminal 141. The back of the second plastic substrate 142 has a second cutout 1424 (containing the second plastic rib 1425) and a second slot 1426.

[0106] The second shielding plate 143 is provided with a second edge locking point 1431, a second window 1432 and a second window locking point 1433. The second window locking points 1433 are spaced 1mm to 2mm apart, and the assembly method is the same as that of the socket base plate A13.

[0107] like Figure 7a , Figure 7bAs shown, the plug connector 20 mainly consists of a plug base 21, a first-type substrate (plug substrate A22), and a second-type substrate (plug substrate B23). The plug base 21 has four guide posts 213 for engaging with the positioning slots 153 on the socket to achieve precise positioning during insertion. Assembly is completed by inserting the plug substrates A22 and B23 into their corresponding plug receiving slots A211 and B212 on the plug base 21, respectively.

[0108] like Figures 8a-8c As shown, the structure of the plug substrate A22 corresponds to that of the socket substrate A13, and the mating areas are symmetrical. It includes a third metal terminal 221, a third plastic substrate 222, and a third shielding sheet 223. The third plastic substrate 222 is injection molded onto the surface of the third metal terminal 221.

[0109] The third metal terminal 221 includes a third grounding fisheye 2211, a third grounding terminal middle portion 2212 with a third hollow slot 2217, a third grounding terminal mating area portion 2213, a third signal fisheye 2214, a third signal terminal middle portion 2215, and a third signal terminal mating area portion 2216.

[0110] The third shielding plate 223 has multiple third windows 2232 located directly above the third hollow slot 2217. Each third window 2232 contains a third window locking point 2233, which is formed by bending the material of the window portion. The third window locking point 2233 is embedded in the third hollow slot 2217.

[0111] like Figures 9a-9c As shown, the structure of the plug substrate B23 corresponds to that of the socket substrate B14, and includes a fourth metal terminal 231, a fourth plastic substrate 232, and a fourth shielding sheet 233.

[0112] The fourth metal terminal 231 includes a fourth grounding fisheye 2311, a fourth grounding terminal middle portion 2312 with a fourth hollowed-out slot 2317, a fourth grounding terminal mating area portion 2313, a fourth signal fisheye 2314, a fourth signal terminal middle portion 2315, and a fourth signal terminal mating area portion 2316.

[0113] The fourth shielding plate 233 is connected by engaging the fourth open slot 2317 through the fourth window locking point 2333 in its fourth window 2332.

[0114] like Figure 10The diagram illustrates the terminal arrangement definition of the mating area on the plug substrate A22 (corresponding to the socket substrate A13). "S" denotes the signal terminal mating area portion (e.g., the third signal terminal mating area portion 2216), and "G" denotes the ground terminal mating area portion (e.g., the third ground terminal mating area portion 2213). The arrangement order (from the pin with the smaller number to the pin with the larger number) is: SGGSSGGSS-...-GGSSGG. Its characteristic is that it begins with a single-ended signal contact (S), and each pair of differential signal contacts (SS) is surrounded on both sides by a pair of ground contacts (GG).

[0115] like Figure 11 The diagram illustrates the terminal arrangement definition of the plug substrate B23 in the mating area (corresponding to the socket substrate B14). The pin arrangement from the smallest to the largest pin number is: GGSSGGSS-...-GGSSGGS. It is characterized by a single-ended signal contact (S) located at the largest pin number position, and each pair of differential signal contacts (SS) is also surrounded on both sides by a pair of ground contacts (GG).

[0116] like Figure 12 As shown, the terminal arrangement and specific dimensions of the pin crimping area are illustrated.

[0117] Use "G" to represent the ground pin and "S" to represent the signal pin.

[0118] The pin arrangement of the socket substrate A13 (Type 1 substrate) from the smallest numbered pin to the largest numbered pin is: SGSSGSS-...-GSSG. That is, starting with a single-ended signal pin (S) located at the smallest numbered pin position, each pair of differential signal pins (SS) is surrounded by a ground pin (G) on both sides.

[0119] The pin arrangement of the B14 socket substrate (Type II substrate) from the smallest to the largest pin number is: GSSGSS-...-GSSGS. That is, it ends with a single-ended signal pin (S) located at the largest pin number position, and each pair of differential signal pins (SS) is also surrounded by a ground pin (G) on both sides.

[0120] The center distance between signal pin 3002 and ground pin 3001 is 1.15mm; the center distance between the two signal pins (SS) of the same differential pair is 1.30mm, forming a non-equal spacing arrangement.

[0121] like Figure 13 and Figure 14As shown, both grounding and signal contacts have a trapezoidal profile exposed to air, with a wider root and a narrower head. The root width is approximately 0.1 mm to 1 mm wider than the head width, preferably in the range of 0.02 mm to 0.2 mm. This structure helps maintain structural strength within a limited space and provides more stable contact during mating.

[0122] like Figure 13 As shown, the front morphological features of the grounding contact in the mating area of ​​the connector are as follows:

[0123] The front of the grounding contact is divided into two sections: the head 2001 is narrower, and the root 2002 is wider, with the root width being 0.1mm to 1mm wider than the head width. The center distance between adjacent grounding contacts is approximately 0.6mm.

[0124] like Figure 14 As shown, the front morphological characteristics of the signal contacts in the mating area of ​​the connector are as follows:

[0125] The front shape of the signal contact is divided into two sections: the signal contact head 2003 is narrow and the signal contact root 2004 is wide, with the root width being 0.1mm~1mm wider than the head width.

[0126] The center distance between adjacent contacts in each mating zone is not a fixed value: the center distance between adjacent signal contacts can be 0.9mm to 1.1mm, the center distance between adjacent signal contacts and grounding contacts is about 1.1mm to 1.3mm, and the center distance between adjacent grounding contacts is about 0.5mm to 0.7mm.

[0127] like Figure 15 As shown, the side profile characteristics of the contacts in the mating area of ​​the connector are as follows:

[0128] The signal contact and the grounding contact have the same side shape, and from the root to the head, they consist of four parts: a sliding part 2005, a transition part 2006, a contact part 2007, and a short post part 2008.

[0129] The sliding contact portion 2005 is designed as a straight line to provide a contact plane for the mating contact. The transition portion 2006 is arc-shaped, serving as the transition between the contact portion 2007 and the sliding contact portion 2005. The contact portion 2007 is the core part, consisting of the protrusion that contacts the mating contact. The short stud portion 2008 is designed as a straight line with a length of less than 1 mm, serving a guiding function during mating.

[0130] like Figure 16As shown, the relative positional relationship of adjacent socket base A and socket base B (or plug base A and plug base B) in the mating area is illustrated. The contacts of the plug and socket are centrally symmetrical to each other, ensuring that the contact portions 2007 of the socket and plug can simultaneously contact the sliding portion 2005 during the mating process.

[0131] Because the contacts of the two substrates are staggered by one position, the signal contact of one substrate and the ground contact of the adjacent substrate are substantially aligned or at least partially overlapped on the projection perpendicular to the arrangement direction, and the center lines of the signal contact and the ground contact are roughly aligned. This projection overlap design, combined with the shielding sheet covering the back of the substrate, forms a three-dimensional surround of the differential signal lines, achieving three-sided shielding and reducing crosstalk.

[0132] like Figure 17a , Figure 17b As shown, the front and side profiles of the guide post 213 on the plug base 21 are shown in detail.

[0133] X direction (direction of the arrangement of the receiving slots):

[0134] Guide surfaces: divided into primary guide surface 2013 (coarse guide) in the X direction and secondary guide surface 2015 (fine guide) in the X direction.

[0135] Positioning surfaces: divided into primary positioning surface 2014 (coarse positioning) in the X direction and secondary positioning surface 2016 (fine positioning) in the X direction. The length of secondary positioning surface 2016 in the X direction is not less than 3mm.

[0136] Y direction (horizontal direction perpendicular to the interlocking direction and perpendicular to the X direction):

[0137] Guide surfaces: divided into the Y-direction primary guide surface 2009 (coarse guide) and the Y-direction secondary guide surface 2011 (fine guide).

[0138] Positioning surfaces: divided into Y-direction primary positioning surface 2010 (coarse positioning) and Y-direction secondary positioning surface 2012 (fine positioning). The length of Y-direction secondary positioning surface 2012 is not less than 3mm.

[0139] Interlocking process:

[0140] In the initial stage, the primary guide surface 2013 in the X direction and the primary guide surface 2009 in the Y direction first come into contact with and rub against the chamfer at the opening of the socket positioning groove 153 to complete the rough guidance.

[0141] Next, the X-direction primary positioning surface 2014 and the Y-direction primary positioning surface 2010 come into contact with the X-direction positioning surface 155 and the Y-direction positioning surface 156 in the positioning groove, respectively, to achieve coarse positioning.

[0142] As the insertion deepens, the secondary guide surface 2015 in the X direction and the secondary guide surface 2011 in the Y direction cooperate with the chamfer 154 to complete the fine guidance.

[0143] Finally, the secondary positioning surface 2016 in the X direction and the secondary positioning surface 2012 in the Y direction fit tightly with the positioning surface in the positioning groove until the plug connector is fully inserted into the socket connector, and the mating is completed.

[0144] The differential signal pair of the present invention can transmit signals at a rate of 40Gbps, with an insertion loss ≥-2dB@DC~20GHz, a return loss ≤-10dB@DC~20GHz, and a crosstalk ≤-35dB@DC~20GHz.

[0145] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

[0146] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0147] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0148] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0149] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0150] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A high-speed electrical connector with three-sided shielding and low crosstalk, comprising a mating socket connector and a plug connector, characterized in that, Both the socket connector and the plug connector include a base, a first type of substrate, and a second type of substrate; The base is provided with a first and a second receiving groove arranged side by side and staggered; The first type of substrate is installed in the first receiving groove, and the second type of substrate is installed in the second receiving groove; Both the first type of substrate and the second type of substrate are provided with signal terminals and ground terminals, and adjacent signal terminals are configured as a differential signal pair; the signal terminal has a signal pin and a signal contact; the ground terminal has a ground pin and a ground contact; the signal pin and the ground pin form a pin crimping area; the signal contact and the ground contact form a mating area; In the pin crimping area, a ground pin is arranged on both sides of the signal pin of the differential signal pair, and any two ground pins are not adjacent to each other; In the mating region, the grounding contacts are arranged in pairs; a pair of grounding contacts are arranged on both sides of the signal contact of the differential signal pair. The first type of substrate and the second type of substrate are both staggered by one terminal position in the pin arrangement of the pin crimping area and the contact arrangement of the mating area; The signal contact of the first type substrate or the second type substrate and the ground contact of the adjacent second type substrate or the first type substrate at least partially overlap in projection on the vertical plane of the first receiving groove and the second receiving groove arrangement direction; The first type of substrate is a socket substrate A or a plug substrate A, the pin arrangement of the first type of substrate is SGSSG…GSSG, and the contact arrangement is SGGSSGG…GGSSGG; The second type of substrate is a socket substrate B or a plug substrate B. The pin arrangement of the second type of substrate is GSSG…GSSGS, and the contact arrangement is GGSSGG…GGSSGGS. Where S represents signal and G represents ground.

2. The high-speed electrical connector with three-sided shielding and low crosstalk according to claim 1, characterized in that, The center distance between adjacent signal contacts and ground contacts is not less than the center distance between two adjacent signal contacts, and the center distance between two adjacent signal contacts is greater than the center distance between two adjacent ground contacts.

3. The high-speed electrical connector with three-sided shielding and low crosstalk according to claim 1, characterized in that, Both the first type of substrate and the second type of substrate include metal terminals, a plastic substrate, and a shielding sheet; The metal terminal includes the grounding terminal and the signal terminal; the grounding terminal includes a grounding eye, a middle part of the grounding terminal, and a grounding terminal mating area; the signal terminal includes a signal eye, a middle part of the signal terminal, and a signal terminal mating area; the middle part of the grounding terminal is provided with a hollow slot; The plastic substrate covers the surface of the metal terminal; The shielding sheet has an opening corresponding to the hollow slot, and the opening has a window locking point that bends towards the hollow slot; the shielding sheet is connected to the hollow slot through the window locking point.

4. A high-speed electrical connector with three-sided shielding and low crosstalk as described in claim 3, characterized in that, The socket substrate A has a first plastic substrate, and the socket substrate B has a second plastic substrate; the first plastic substrate and the second plastic substrate have a cutout on the side away from the metal terminal that is aligned with the center of the differential signal pair, and the cutout has a plastic rib.

5. A high-speed electrical connector with three-sided shielding and low crosstalk according to claim 4, characterized in that, The first plastic substrate and the second plastic substrate have ribs between the signal terminal with the shorter length in the differential signal pair and the adjacent ground terminal; The plastic portion surface between the differential signal pairs and the plastic portion surface between the signal terminal with a longer length in the differential signal pair and the adjacent ground terminal are flush with the surface of the metal terminal.

6. A high-speed electrical connector with three-sided shielding and low crosstalk according to claim 4, characterized in that, The socket substrate A has a first shielding sheet, and the socket substrate B has a second shielding sheet; the outer sides of the first shielding sheet and the second shielding sheet are also provided with edge locking points, and the plastic substrate is provided with a locking groove that mates with the edge locking points.

7. A high-speed electrical connector with three-sided shielding and low crosstalk according to claim 1, characterized in that, The front contours of the signal contact and the grounding contact are trapezoidal, with the root width being greater than the head width.

8. A high-speed electrical connector with three-sided shielding and low crosstalk according to claim 7, characterized in that, The signal contact and the grounding contact have the same side shape; from the root to the head, they sequentially include a sliding part, a transition part, a contact part, and a short stake part; the sliding part is a plane, the transition part is a smooth arc surface, the contact part is an outwardly convex contact surface, and the short stake part is a plane.

9. A high-speed electrical connector with three-sided shielding and low crosstalk according to claim 7, characterized in that, The mating areas of the socket connector and the plug connector are symmetrically centered, and during the mating process, the contacts of both sides simultaneously come into contact with the corresponding sliding parts.

10. A high-speed electrical connector with three-sided shielding and low crosstalk according to claim 1, characterized in that, The base of the socket is provided with a positioning groove, and the base of the plug is provided with a guide post corresponding to the positioning groove; The positioning groove has a rectangular cross-section and is symmetrically arranged on two surfaces parallel to the X direction, with a chamfer at the opening; the X direction is the arrangement direction of the first and second receiving grooves.

11. A high-speed electrical connector with three-sided shielding and low crosstalk as described in claim 10, characterized in that, The guide post has a primary guide surface, a secondary guide surface, a primary positioning surface, and a secondary positioning surface in both the X and Y directions; the positioning groove has a chamfer that mates with the primary guide surface and the secondary guide surface, and a side wall surface that mates with the primary positioning surface and the secondary positioning surface. The Y direction is a direction perpendicular to the X direction on a plane perpendicular to the mating direction of the socket connector and the plug connector.

12. A high-speed electrical connector with three-sided shielding and low crosstalk according to claim 1, characterized in that, The socket connector also includes: A socket cover, wherein the socket cover is provided with cover holes corresponding to each pin of the pin crimping area; A socket clip, located between the first type of substrate and the second type of substrate, is used to fix the first type of substrate and the second type of substrate within the base of the socket.

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