Electric connector, circuit board assembly and electronic equipment

Abstract

The utility model relates to the technical field of electronic devices, and discloses an electric connector, a circuit board assembly and electronic equipment. According to the electric connector provided by the embodiment of the invention, by changing the orientation of the contact part (such as the elastic arm) of one of the two adjacent rows of terminals, the two adjacent rows of terminals are arranged in a back-to-back manner, and the connecting parts of the two rows of terminals are adjacent to each other, so that the coupling distance between the two adjacent rows of terminals can be reduced, the coupling area can be increased, and the terminal capacitance can be improved; and the effect of reducing the terminal impedance is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic devices, and in particular to an electrical connector, a circuit board assembly, and an electronic device. Background Art

[0002] Electrical connectors are generally used to achieve electrical connection and signal transmission between a circuit board and a chip, or to achieve electrical connection and signal transmission between different circuit boards.

[0003] As signal transmission rates continue to increase, the bandwidth requirements for electrical connectors are also increasing. However, the terminals in electrical connectors, which are primarily used for signal transmission, typically exhibit high impedance, which is not conducive to high-speed signal transmission. Therefore, how to effectively reduce the impedance of the terminals in electrical connectors is an urgent problem that needs to be solved. Utility Model Content

[0004] In order to solve the above problems, embodiments of the present application provide an electrical connector, a circuit board assembly, and an electronic device.

[0005] In a first aspect, an embodiment of the present application provides an electrical connector comprising at least one group of terminals, each group of terminals comprising two rows of terminals spaced apart along a first direction; the first row of terminals in the two rows of terminals comprises a plurality of first terminals arranged in sequence along a second direction, the second row of terminals comprises a plurality of second terminals arranged in sequence along the second direction, the plurality of first terminals and the plurality of second terminals corresponding one to one; each terminal comprises a connecting portion and two contact portions, the two contact portions are respectively located at two ends of the connecting portion along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; wherein the projections of the connecting portions of the corresponding first terminals and the second terminals on a first plane at least partially overlap, and the first plane is perpendicular to the first direction; and, along the first direction, the contact portion of each first terminal extends toward the side of the first row of terminals facing away from the second row of terminals, and the contact portion of each second terminal extends toward the side of the second row of terminals facing away from the first row of terminals.

[0006] Based on the above scheme, the electrical connector of the embodiment of the present application changes the orientation of the contact portion (such as the spring arm) of one row of terminals in two adjacent rows of terminals, so that the two adjacent rows of terminals are arranged back to back, and the connection portions of the two rows of terminals are close to each other, thereby reducing the coupling spacing between the two adjacent rows of terminals, increasing the coupling area, and improving the terminal capacitance, thereby achieving the effect of reducing the terminal impedance.

[0007] The first direction may be the X direction mentioned in the embodiment of the present application, the second direction may be the Y direction mentioned in the embodiment of the present application, and the third direction is perpendicular to the X and Y directions. The first plane is perpendicular to the X direction. For example, the terminals in the electrical connector are generally arranged in an array, and the X and Y directions may be the row and column directions, respectively, in the array arrangement.

[0008] In some possible implementations of the first aspect above, the electrical connector further includes an insulator, the insulator includes a plurality of accommodating cavities, and each accommodating cavity is used to fix a connecting portion of each terminal.

[0009] As will be understood, the insulator is primarily used to secure the terminals and is provided with multiple cavities, each of which can be used to secure at least one terminal to ensure terminal stability. Securement methods include, but are not limited to, direct securement through clamping, snapping, and snapping, or indirect securement through fasteners. The insulator is made of plastic, ensuring excellent mechanical properties.

[0010] In some possible implementations of the first aspect above, projections of the connecting portions of the corresponding first terminals and second terminals on the first plane completely overlap.

[0011] In some possible implementations of the first aspect, along the second direction, the connection portion of the first terminal is staggered with the connection portion of the corresponding second terminal.

[0012] It can be understood that the terminal capacitance is related to the coupling spacing and coupling area of ​​the two adjacent rows of terminals. The smaller the coupling spacing between the two adjacent rows of terminals and the larger the coupling area, the greater the terminal capacitance and the lower the terminal impedance. Therefore, the connecting parts of the corresponding first and second terminals are close to each other along the X direction, so that the coupling spacing between the two adjacent rows of terminals is small, so that the projections of the connecting parts of the corresponding first and second terminals on the first plane only need to partially overlap to increase the terminal capacitance and reduce the terminal impedance.

[0013] In some possible implementations of the first aspect, along the first direction, the distance between the connecting portion of the first terminal and the connecting portion of the corresponding second terminal is 0.34 to 0.9 mm. It is understood that in the embodiment of the present application, the minimum coupling spacing between two adjacent rows of terminals can be as small as 0.34 mm, which can significantly reduce terminal impedance.

[0014] In some possible implementations of the first aspect above, one contact portion of each terminal includes a spring arm, and the other contact portion includes a solder ball.

[0015] It is understood that the electrical connector of the embodiment of the present application may be a spring-type LGA / BGA terminal structure, where LGA (land grid array) refers to a grid array package, and BGA (ball grid array) refers to a ball grid array package.

[0016] In some possible implementations of the first aspect above, the two contact portions of each terminal include elastic arms.

[0017] It can be understood that the electrical connector of the embodiment of the present application may also be a spring-arm type LGA / LGA terminal structure.

[0018] In some possible implementations of the first aspect, each terminal is made of metal, including but not limited to pure metals such as gold, silver, copper, and aluminum, or alloys thereof.

[0019] In some possible implementations of the first aspect, each terminal is an integrated structure, such as integrally stamped.

[0020] In a second aspect, an embodiment of the present application provides a circuit board assembly, comprising the electrical connector of the first aspect, a circuit board, and an electronic device, wherein the electrical connector is electrically connected to the circuit board and the electronic device, respectively.

[0021] In a third aspect, an embodiment of the present application provides an electronic device, comprising the electrical connector and an electronic device according to the first aspect, wherein the electrical connector is electrically connected to the electronic device.

[0022] It can be understood that the technical effects of the above-mentioned second and third aspects can refer to the description of the above-mentioned first aspect and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1A According to some embodiments of the present application, a schematic diagram of a circuit board assembly 1 is shown;

[0024] Figure 1B According to some embodiments of the present application, a schematic diagram of another circuit board assembly 1 is shown;

[0025] Figure 1C According to some embodiments of the present application, a schematic diagram of a circuit board assembly 2 is shown;

[0026] Figure 2A According to some embodiments of the present application, a schematic structural diagram of an electrical connector 03 with a spring-type LGA / BGA terminal architecture is shown;

[0027] Figure 2B According to some embodiments of the present application, a schematic structural diagram of an electrical connector 03 ′ with a spring-type LGA / LGA terminal architecture is shown;

[0028] Figure 3A According to some embodiments of the present application, a schematic structural diagram of an elastic arm 0312 is shown;

[0029] Figure 3B According to some embodiments of the present application, a schematic structural diagram of the elastic arm 0312 from another perspective is shown;

[0030] Figure 4 According to some embodiments of the present application, a two-dimensional schematic diagram of a terminal arrangement in an electrical connector 03 is shown;

[0031] Figure 5 According to some embodiments of the present application, a two-dimensional schematic diagram of a first terminal arrangement in an electrical connector 10 is shown;

[0032] Figure 6 According to some embodiments of the present application, a simulation diagram of impedance performance of terminal 031 and terminal 101 is shown;

[0033] Figure 7 According to some embodiments of the present application, a two-dimensional schematic diagram of a second terminal arrangement in the electrical connector 10 is shown. DETAILED DESCRIPTION

[0034] Illustrative embodiments of the present application include, but are not limited to, an electrical connector, a circuit board assembly, and an electronic device.

[0035] As mentioned above, the electrical connector can realize electrical connection and signal transmission between a circuit board and a chip, or between different circuit boards. Figures 1A to 1C An exemplary application scenario of the electrical connector according to an embodiment of the present application is shown.

[0036] like Figure 1A As shown, in some scenarios, the circuit board assembly 1 may include a circuit board 01, a chip 02, and an electrical connector 03. The electrical connector 03 is disposed between the circuit board 01 and the chip 02 along the thickness direction of the circuit board assembly 1 (the Z direction shown in each figure), and is electrically connected to the circuit board 01 and the chip 02, respectively, to achieve signal transmission between the circuit board 01 and the chip 02.

[0037] like Figure 1B As shown, in some scenarios, the circuit board assembly 1 may further include a mounting structure 04 . The mounting structure 04 is disposed around the chip 02 and has a contact surface S1 perpendicular to the Z direction with the chip 02 .

[0038] like Figure 1A As shown in FIG1B , electrical connector 03 includes multiple terminals 031 (four terminals 031 are shown as an example) and an insulator 032. Terminal 031 is made of metal and includes a connecting portion 031a and two contact portions 031b and 031c, with the two contact portions 031b and 031c located at opposite ends of connecting portion 031a along the Z direction. Connecting portion 031a secures terminal 031 within insulator 032, while the two contact portions 031b and 031c are exposed on two surfaces of insulator 032 along the Z direction. Thus, one contact portion 031b is electrically connected to pad 021 on chip 02, and the other contact portion 031c is electrically connected to pad 011 on circuit board 01.

[0039] For example, refer to Figure 1BDuring the assembly process of the circuit board assembly 1, the electrical connector 03 can first be fixed to the surface of the circuit board 01 by welding or mechanical fixing technology, so that the contact portion 031c of each terminal 031 in the electrical connector 03 is electrically connected to the corresponding pad 011 on the circuit board 01. Then, the chip 02 is placed in the insulator 032 of the electrical connector 03. Under the action of the gravity of the chip 02, the contact portion 031b of the terminal 031 is electrically connected to the pad 021 of the chip 02. Then, the mounting structure 04 is placed, and the mounting structure 04 is pressed by an external force (as shown by the arrow). The mounting structure 04 can transmit force through the contact surface S1 to press the chip 02 and the electrical connector 03, thereby realizing the electrical connection between the chip 02, the electrical connector 03 and the circuit board 01. It can be understood that sufficient external pressure can enhance the environmental adaptability and long-term vibration and shock resistance of the circuit board assembly 1.

[0040] For example, the circuit board 01 can be a motherboard, also known as a mainboard, system board, or motherboard. A motherboard is typically a rectangular circuit board, typically equipped with a central processing unit (CPU), graphics chip, power management chip, memory control chip, input / output control chip, and so on. The motherboard and chips can transmit not only digital signals but also power signals to power the chips.

[0041] like Figure 1C As shown, in some scenarios, the circuit board assembly 2 may include a circuit board 05, a circuit board 06, and an electrical connector 07. Along the thickness direction (Z direction) of the circuit board assembly 2, the electrical connector 07 is disposed between the circuit board 05 and the circuit board 06, and is electrically connected to the circuit board 05 and the circuit board 06, respectively, to achieve signal transmission between the circuit board 02 and the circuit board 06. The structure of the electrical connector 07 may refer to the structure of the electrical connector 03 described above. Figure 1C Only some terminals 071 of the electrical connector 07 are shown schematically.

[0042] It is understood that the circuit board 05 / circuit board 06 can be a single-layer circuit board or a multi-layer circuit board. Figure 1C In the example, circuit board 05 is a multi-layer circuit board and circuit board 06 is a single-layer circuit board. Circuit board 05 / circuit board 06 include but are not limited to package substrates, rigid printed circuit boards (PCBs), flexible PCBs, and similar substrates.

[0043] Currently, the architecture of the electrical connector 03 / 07 is mainly a spring-type LGA / BGA terminal architecture or an LGA / LGA terminal architecture.

[0044] Take electrical connector 03 as an example, Figure 2A FIG. 1 shows a schematic structural diagram of an electrical connector 03 with a spring-type LGA / BGA terminal structure. Figure 2A As shown, electrical connector 03 includes a plurality of terminals 031 and an insulator 032. Connecting portion 031a of terminal 031 includes a clamping member 0311, which is used to secure terminal 031 within insulator 032. Contact portion 031b of terminal 031 includes a spring arm 0312, and contact portion 031c includes a solder ball 0313. Spring arm 0312 can be electrically connected to pad 021 of chip 02 in circuit board assembly 1, and solder ball 0313 can be electrically connected to pad 011 of circuit board 01 in circuit board assembly 1.

[0045] Figure 2B FIG. 1 shows a schematic structural diagram of an electrical connector 03' having an elastic arm type LGA / LGA terminal structure. Figure 2B As shown, electrical connector 03' includes a plurality of terminals 031' and an insulator 032'. The connecting portion 031a' of each terminal 031' includes a clamping member 0311', which is used to secure the terminal 031' within the insulator 032'. The contact portion 031c' and the contact portion 013b' of the terminal 031' each include an elastic arm 0312'. One elastic arm 0312' can be electrically connected to the pad 021 of the chip 02 in the circuit board assembly 1, and the other elastic arm 0312' can be electrically connected to the pad 011 of the circuit board 01 in the circuit board assembly 1.

[0046] The manufacturing process of the two elastic-arm type electrical connectors 03 / 03' generally includes stamping and electroplating the terminals 031 / 031' of metal materials such as copper alloy, injection molding the insulators 032 / 032' using plastic materials, and then assembling the terminals 031 / 031' into the insulators 032 / 032' to form the finished electrical connectors 03 / 03'.

[0047] It can be understood that both elastic arm 0312 and elastic arm 0312' can be considered a cantilever beam. For example, elastic arm 0312 has one fixed end for connection to connector 031a, and the other end is a movable end for contacting a solder pad. In circuit board assembly 1, one end of elastic arm 0312 contacts solder pad 021 of chip 02. Pressing down on chip 02 deforms elastic arm 0312, generating a positive force F along the Z direction, thereby ensuring stable and reliable electrical conduction with solder pad 021.

[0048] Specifically, Figure 3A and 3B Schematic diagrams of the structure of the elastic arm 0312 at different viewing angles are shown. Figure 3A and Figure 3BAs shown, the elastic arm 0312 is pressed down by the chip 02 to generate a displacement D along the Z direction. The thickness of the elastic arm 0312 is T, the length is L, the width is W, and the material modulus of the elastic arm 0312 is E. The magnitude of the positive force F is related to the displacement D, the material modulus E, the width W and the thickness T. 3 Proportional to the length L 3 Inversely proportional.

[0049] It is understandable that during the design process of terminal 031, the aforementioned physical dimensions, such as the appropriate length and width of the elastic arm, must be designed to meet the mechanical performance requirements. However, once the mechanical properties of terminal 031 are determined, the impedance of terminal 031 is typically high, which is not conducive to high-speed applications, especially applications with speeds of 112 gigabits per second (Gbps) and above, and the impedance of terminal 031 needs to be reduced.

[0050] The impedance characteristics of the terminal are as follows: it is proportional to the terminal inductance and inversely proportional to the terminal capacitance. However, widening or thickening the elastic arm can reduce the inductance, increase the capacitance, and thus reduce the impedance; reducing the length of the elastic arm can reduce the inductance and thus reduce the impedance; but both will affect the mechanical properties of the elastic arm. Therefore, in some embodiments, the terminal capacitance is increased and the terminal impedance is reduced by using a plastic material with a high dielectric constant (Dk) to make the insulator or by reducing the distance between two adjacent terminal contacts (i.e., the contact point between the terminal and the pad).

[0051] To ensure reliable application, the plastic material of the insulator has mechanical properties such as high fluidity, high strength, and good warpage performance. However, the distance (pitch) between two adjacent terminal contacts is usually relatively small, the plastic barrier between two adjacent terminals in the insulator is thin, the injection molding channel of the insulator is narrow, and the strength of the plastic barrier after molding is low. In addition, if the Dk value of the plastic material is to be increased, it is usually necessary to change the material formula, and its mechanical properties will also change accordingly, which will affect the processability and reliability of the insulator. In addition, if the distance between two adjacent terminal contacts is to be further reduced, the available space of each terminal will be further compressed, and the structural dimensions such as the terminal width and the thickness of the insulator plastic barrier will need to be further reduced to avoid the terminal short circuit problem, which will deteriorate the mechanical properties of the terminal, deteriorate the processability and reliability of the insulator plastic, and bring greater engineering risks.

[0052] Based on this, embodiments of the present application provide an electrical connector that, by changing the arrangement of the terminals, effectively reduces the impedance of the terminals, facilitating their application in high-speed communication scenarios. Furthermore, this approach eliminates the need to change the insulator plastic material, alter the terminal structure design and mechanical properties, or reduce the distance between adjacent terminal contacts, ensuring the mechanical properties of the insulator and the terminals are maintained.

[0053] Figure 4FIG. 1 shows a two-dimensional schematic diagram of a terminal arrangement in an electrical connector 03. Figure 4 As shown, the multiple terminals 031 in the electrical connector 03 are arranged in an array along the X direction (first direction) and the Y direction (second direction). Here, a rectangular array of four rows and seven columns is used as an example, where the X direction, Y direction, and Z direction are mutually perpendicular. The elastic arm 0312 of each terminal 031 extends from the connecting portion 031a along the X direction. In addition, the elastic arm 0312 of each terminal 031 is oriented in the same direction, all toward the previous row of terminals in its row. For example, the elastic arm 0312 in the second row extends toward the first row, and the elastic arm 0312 in the third row extends toward the second row.

[0054] It can be understood that there is a coupling effect between terminals 031, e.g. Figure 4 As shown in the enlarged partial image, the connection portion 031a of the fourth terminal in the first row and the connection portion 031a of the fourth terminal in the second row form a parallel plate capacitor, with a coupling distance G1 between them. The formula for parallel plate capacitance is capacitance C = Dk * (S / G), where S represents the coupling area and G represents the coupling distance. Therefore, the larger the distance between the connection portions of two adjacent rows of terminals, the smaller the capacitance.

[0055] An embodiment of the present application provides an electrical connector 10, which changes the direction of the spring arms of one row of terminals in two adjacent rows of terminals. For example, each terminal in the row is rotated 180 degrees on the spot, so that the two adjacent rows of terminals are arranged back to back, with the spring arms facing opposite directions. The connecting parts of the two rows of terminals are close to each other, thereby reducing the coupling spacing and increasing the coupling area, thereby achieving the effect of increasing the terminal capacitance and reducing the terminal impedance.

[0056] In the embodiment of the present application, the electrical connector 10 includes at least one set of terminals, each set of terminals comprising two rows of terminals spaced apart along the X-direction. Within the two rows of terminals, the first row comprises K first terminals sequentially arranged along the Y-direction, and the second row comprises K second terminals sequentially arranged along the Y-direction, where K is a positive integer greater than or equal to 2. It is understood that the structures of the first and second terminals can be identical, with only the spring arms oriented differently.

[0057] Figure 5 FIG. 1 shows a two-dimensional schematic diagram of a first terminal arrangement in the electrical connector 10. Figure 5 As shown, the two rows of terminals in each terminal group of the electrical connector 10 are aligned in both the X direction and the Y direction. Exemplarily, the electrical connector 10 includes a first terminal group 10-1 consisting of a first row of terminals and a second row of terminals, and a second terminal group 10-2 consisting of a third row of terminals and a fourth row of terminals.

[0058] It should be noted that Figure 5Only two groups of terminals in the electrical connector 10 are shown for example, and each row may include 7 terminals. In actual applications, the electrical connector 10 may have more or fewer groups of terminals, and the number of terminals in each row may be more or less.

[0059] Taking the first group of terminals 10-1 as an example, the structure of each first terminal 101 of the first row of terminals and the structure of each second terminal 102 of the second row of terminals can be the same as the structure of terminals 031 / 031'. For example, the first terminal 101 can include a connecting portion 101a and a contact portion 101b, and the contact portion 101b includes an elastic arm 1011. The second terminal 102 can include a connecting portion 102a and a contact portion 102b, and the contact portion 102b includes an elastic arm 1021. Please refer to the above description for details, which will not be repeated here. The multiple first terminals 101 of the first row of terminals and the multiple second terminals 102 of the second row correspond one to one. That is, the i-th first terminal 101 in the first row corresponds to the i-th second terminal 102 in the second row.

[0060] Along the X direction, the elastic arm 1011 of the i-th first terminal 101 in the first row extends toward the side of the first terminal 101 facing away from the i-th second terminal 102 in the second row (which can also be understood as extending toward the side of the first row of terminals facing away from the second row of terminals); the elastic arm 1021 of the i-th second terminal 102 extends toward the side of the second terminal 102 facing away from the i-th first terminal 101 in the first row (which can also be understood as extending toward the side of the second row of terminals facing away from the first row of terminals), where i is a positive integer less than or equal to K. That is, i can take values ​​from 1 to K, for example, i = 1, 2, ..., K. In this way, the two rows of terminals in each terminal group are arranged back-to-back, with the elastic arms facing opposite directions.

[0061] It should be noted that, in the embodiment of the present application, along the X direction, the elastic arm 1011 of the i-th first terminal 101 in the first row extends toward the side of the first terminal 101 facing away from the i-th second terminal 102 in the second row. This may include: the elastic arm 1011 of the i-th first terminal 101 extends parallel to the X direction, or extends obliquely along the X direction, toward the side of the first terminal 101 facing away from the i-th second terminal 102 in the second row. That is, the embodiment of the present application only limits the extension direction of the elastic arm 1011 (that is, the side of the first row of terminals facing away from the second row of terminals), and does not limit the extension angle of the elastic arm 1011. The extension direction of the elastic arm 1011 can be parallel to or intersecting with the X direction.

[0062] Similarly, along the X-direction, the elastic arm 1021 of the i-th second terminal 102 extends toward the side of the second terminal 102 facing away from the i-th first terminal 101 in the first row, which may include: the elastic arm 1021 of the i-th second terminal 102 extends parallel to the X-direction, or extends obliquely along the X-direction, toward the side of the second terminal 102 facing away from the i-th first terminal 101 in the first row. That is, the embodiment of the present application only limits the extension direction of the elastic arm 1021 (that is, the side of the second row of terminals facing away from the first row of terminals), and does not limit the extension angle of the elastic arm 1021. The extension direction of the elastic arm 1021 can be parallel to or intersecting with the X-direction.

[0063] In some embodiments, the connecting portion 101a of the i-th first terminal 101 in the first row is aligned with the connecting portion 102a of the i-th second terminal 102 in the second row along the Y direction, or in other words, there is no offset in the Y direction. Figure 5 As shown in the partially enlarged view in FIG, the projection of the connecting portion 101a of the fourth first terminal 101 in the first row on the first plane F1 (perpendicular to the X direction) completely overlaps with the projection of the connecting portion 102a of the fourth second terminal 102 in the second row on the first plane F1. In other words, the connecting portions 101a and 102a have an overlapping area S2 on the first plane F1. In addition, a coupling gap G2 is defined between the connecting portions 101a and 102a.

[0064] Compared to Figure 4 The connection parts 031a of the two adjacent rows of terminals, the connection parts 101a and the connection parts 102a have a larger coupling area and a smaller coupling spacing, so that the flat plate capacitor formed between the connection parts 101a and the connection parts 102a has a larger capacitance value, thereby achieving the effect of increasing the terminal capacitance and reducing the terminal impedance.

[0065] Figure 6 A simulation diagram of the impedance performance of terminals 031 and 101 is shown. The solid line represents the impedance performance of terminal 101, and the dashed line represents the impedance performance of terminal 031. Assuming that terminals 031 and 101 are made of the same material and the insulators they house are made of the same material, the impedance of terminal 101 can be reduced by 3 to 5 ohms.

[0066] In some embodiments, the electrical connector 10 further includes an insulator, which includes a plurality of accommodating cavities, each of which is configured to secure the connecting portion 101a / 102b of the terminal 101 / 102. The insulator may be made of materials including, but not limited to, plastic, ceramic, glass, and the like. Examples of such materials include, but are not limited to, polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC).

[0067] In some embodiments, along the X direction, the distance between the connecting portion 101a of the i-th first terminal 101 and the connecting portion 102 of the i-th second terminal 102 (as shown in the coupling spacing G2 above) is 0.34 to 0.9 millimeters (mm). For example, it can be 0.34 mm, 0.55 mm, 0.66 mm, 0.82 mm, etc. It will be understood that the smaller the coupling spacing G2, the greater the terminal capacitance and the lower the impedance.

[0068] In some embodiments, the structure of the first terminal 101 is the same as that of the terminal 031 ′ in the above embodiment, that is, one of the two contact portions of the first terminal 101 includes a solder ball.

[0069] In other embodiments, the structure of the first terminal 101 is the same as that of the terminal 031 in the above embodiment, that is, both contact portions of the first terminal 101 include elastic arms. The second terminal 102 has the same structure as the first terminal 101 .

[0070] In some embodiments, each terminal 101 / 102 is made of metal, including but not limited to pure metals such as gold, silver, copper, aluminum, or alloys thereof.

[0071] In some embodiments, each terminal 101 / 102 is an integral structure, for example, integrally stamped.

[0072] Figure 7 A two-dimensional schematic diagram of the second terminal arrangement in the electrical connector 10 is shown. Figure 5 The first terminal arrangement shown is different only in that the two rows of terminals in each terminal group are staggered.

[0073] In some embodiments, along the Y direction, the connection portion 101a of the i-th first terminal 101 in the first row of each terminal group and the connection portion 102b of the i-th second terminal 102 in the second row are staggered, or have a certain offset in the Y direction. Figure 7 As shown in the partially enlarged view in FIG, the projection of the connecting portion 101a of the second first terminal 101 in the first row on the first plane F1 (perpendicular to the X direction) only partially overlaps with the projection of the second second terminal 102 in the second row on the first plane F1. That is, the connecting portion 101a and the connecting portion 102a have an overlapping area S3 on the first plane F1. There is also a coupling gap G2 between the connecting portion 101a and the connecting portion 102a.

[0074] Understandably, compared to Figure 5In this embodiment, connecting portion 101a and connecting portion 102a have an overlapping area S2 on first plane F1. Because S3 is smaller than S2, the coupling between the terminals in the second terminal arrangement is weaker than that in the first terminal arrangement. However, due to the relatively small coupling spacing between connecting portion 101a and connecting portion 102a, the terminal capacitance is increased and the terminal impedance is reduced.

[0075] In summary, the electrical connector provided in the embodiments of the present application effectively reduces terminal impedance through an innovative design that changes the terminal arrangement, without changing the insulator material and terminal structure design, reducing the terminal contact distance, or increasing engineering risks. Furthermore, the electrical connector can improve the impedance consistency of high-speed links transmitting high-speed signals and reduce link reflections, helping to expand the application of electrical connectors in the 112Gbps / 112Gbps+ and pulse amplitude modulation fields.

[0076] The present application also provides a circuit board assembly, comprising the electrical connector 10, a circuit board and an electronic device of the above embodiment, wherein the electrical connector 10 is electrically connected to the circuit board and the electronic device respectively. Figure 5 or Figure 7 With the arrangement of terminals shown, the electronic device may be a circuit board or a chip.

[0077] The present application also provides an electronic device, comprising the electrical connector 10 and an electronic device of the above embodiment, wherein the electrical connector 10 is electrically connected to the electronic device. Figure 5 or Figure 7 With the terminal arrangement shown, the electronic device may be a circuit board or chip inside or outside an electronic device.

[0078] The aforementioned circuit boards include, but are not limited to, package substrates, rigid printed circuit boards (PCBs), flexible PCBs, and similar substrates. The materials used for the circuit boards include, but are not limited to, bismaleimide triazine (BT), ajinomoto buildup film (ABF), polyimide (PI), and polyester (PET).

[0079] The electronic devices mentioned in the embodiments of this application include, but are not limited to, mobile phones, tablet personal computers, e-book readers, televisions, laptop computers, personal digital assistants (PDAs), personal computers (PCs), notebook computers, vehicle-mounted devices, and wearable devices, and this application does not make specific limitations on these devices.

[0080] The above describes the implementation mode of the present application by means of specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation mode. On the contrary, the purpose of introducing the application in conjunction with the implementation mode is to cover other options or modifications that may be extended based on the claims of the present application. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details are omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other unless there is a conflict.

[0081] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0082] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. An electrical connector, characterized in that: It comprises at least one group of terminals, each group of terminals comprising two rows of terminals spaced apart along a first direction; The first row of terminals in the two rows of terminals includes a plurality of first terminals sequentially arranged along a second direction, and the second row of terminals includes a plurality of second terminals sequentially arranged along the second direction, and the plurality of first terminals correspond to the plurality of second terminals in one-to-one correspondence; Each terminal includes a connecting portion and two contact portions, wherein the two contact portions are respectively located at two ends of the connecting portion along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; The projections of the corresponding connecting portions of the first and second terminals on a first plane at least partially overlap, and the first plane is perpendicular to the first direction; and, along the first direction, the contact portion of each first terminal extends toward the side of the first row of terminals facing away from the second row of terminals, and the contact portion of each second terminal extends toward the side of the second row of terminals facing away from the first row of terminals.

2. The electrical connector according to claim 1, wherein: The electrical connector further includes an insulator, which includes a plurality of accommodating cavities, each of which is used to fix the connecting portion of each terminal.

3. The electrical connector according to claim 1, wherein: Projections of corresponding connection portions of the first terminal and the second terminal on the first plane completely overlap.

4. The electrical connector according to claim 1, wherein: Along the second direction, the connecting portion of the first terminal is staggered with the corresponding connecting portion of the second terminal.

5. The electrical connector according to any one of claims 1 to 4, characterized in that: Along the first direction, a distance between a connecting portion of the first terminal and a corresponding connecting portion of the second terminal is 0.34 to 0.9 mm.

6. The electrical connector according to any one of claims 1 to 4, characterized in that: One contact portion of each terminal includes a spring arm, and the other contact portion includes a solder ball.

7. The electrical connector according to any one of claims 1 to 4, characterized in that: The two contact portions of each terminal include elastic arms.

8. The electrical connector according to claim 7, wherein: Each terminal is made of metal material.

9. The electrical connector according to claim 8, wherein: Each terminal is an integrated structure.

10. A circuit board assembly, characterized in that: The invention comprises the electrical connector, circuit board and electronic device according to any one of claims 1 to 9, wherein the electrical connector is electrically connected to the circuit board and the electronic device respectively.

11. An electronic device, characterized in that: The invention comprises the electrical connector and the electronic device according to any one of claims 1 to 9, wherein the electrical connector is electrically connected to the electronic device.

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