CN100440627C - electrical connector terminal - Google Patents

Abstract

The invention relates to an electrical connector terminal (20), which is used to provide a signal transmission path between two electrical interfaces, which includes a plate-shaped base (22) extending in the vertical direction, and extending laterally from the side edge of the base The "C"-shaped bending part (23), the elastic arm (24) extending upward from the center of the top end of the "C"-shaped bending part, and the welding part (25) at the lower end of the base. The bending part is provided with a plate-like extension part (26) parallel to the base on the side away from the base, thereby adjusting the impedance of the electrical connector terminals and improving the shielding effect of the electrical connector terminals.

Description

electrical connector terminal

【Technical field】

The invention relates to an electrical connector terminal, especially an electrical connector terminal which can provide better electrical characteristics.

【Background technique】

According to the shape and structure of the conductive components of the chip module, the electrical connectors used to electrically accept the chip module can generally be divided into pin grid array (Pin Grid Array, PGA) connectors, ball grid array (Ball Grid Array, BGA) connectors and Land Grid Array (LGA) connectors. Correspondingly, the electrical connector terminals accommodated in the electrical connector to provide a signal transmission path between two electrical interfaces are also classified into PGA-type terminals, BGA-type terminals and LGA-type terminals.

The prior art has disclosed a variety of electrical connector terminals. For related patents, please refer to US Patent No. 6,688,893 announced on February 10, 2004 and US Patent No. 6,830,471 announced on December 14, 2004. The above-mentioned electrical connection The device terminal generally includes a base, and arm portions and soldering portions respectively extending from two sides of the base. When in use, the base of the electrical connector terminal is held in the terminal groove of the insulating body, and the arm portion and the welding portion of the electrical connector terminal are respectively connected to the conductive element of the chip module and the solder joint on the printed circuit board, so that A signal transmission path is formed between the group and the printed circuit board.

In actual use, in order to realize the stable transmission of signals, especially high-frequency signals, between the chip module and the printed circuit board, the impedance of the electrical connector terminal should match the impedance of the conductive components of the chip module and the solder joints of the printed circuit board . However, the above-mentioned prior art electrical connector terminal has at least the following disadvantages: the impedance of the electrical connector terminal is only realized by the setting of mechanical characteristic parts such as the base, the arm and the welding part, and it is difficult to integrate with the conductive element of the chip module, the printed circuit board, etc. The impedance matching of the solder joints, the electrical characteristics of the high-frequency signal transmission of the electrical connector terminals are poor, and signal crosstalk is easily generated between adjacent electrical connector terminals.

In view of the above disadvantages, it is indeed necessary to design a new type of electrical connector terminal.

【Content of invention】

The technical problem to be solved by the present invention is to provide an electrical connector terminal with good electrical characteristics, which can form a stable signal transmission path between two electrical interfaces.

To this end, the present invention provides an electrical connector terminal for providing a signal transmission path between the first electrical interface and the second electrical interface, which includes a base extending between the two electrical interfaces, and one end of the base The first docking portion extending toward the first electrical interface and the second docking portion extending from the other end of the base portion toward the second electrical interface, the electrical connector terminals are provided with at least one pair of oppositely disposed sheet structures.

Compared with the prior art, the electrical connector terminal of the present invention has at least the following advantages: the oppositely arranged sheet structures can generate a capacitive effect in the signal transmission process, thereby adjusting the impedance of the electrical connector terminal to realize the impedance of the electrical connector terminal. and the matching between the electrical interface impedance. In addition, the relative arrangement of the sheet structures can also improve the shielding effect of the electrical connector terminals, preventing possible crosstalk between adjacent electrical connector terminals during signal transmission.

【Description of drawings】

Four specific embodiments of the electrical connector terminal of the present invention will be further described in detail below in conjunction with the accompanying drawings.

FIG. 1 is a schematic perspective view of a first embodiment of an electrical connector terminal of the present invention;

Fig. 2 is a partial top view of the terminals of the electrical connector shown in Fig. 1 assembled on the insulating body;

Fig. 3 is a partial cross-sectional view of the electrical connector shown in Fig. 2 along the height direction of the insulating body, wherein the two ends of the electrical connector terminals have been respectively docked with the chip module and the printed circuit board;

Fig. 4 is a sectional view of the electrical connector shown in Fig. 3 along the line A-A;

5 is a schematic perspective view of a second embodiment of an electrical connector terminal of the present invention;

6 is a schematic perspective view of a third embodiment of an electrical connector terminal of the present invention;

FIG. 7 is a schematic perspective view of a fourth embodiment of an electrical connector terminal of the present invention.

【Detailed ways】

Figures 1 to 7 respectively show four specific embodiments of the electrical connector terminals of the present invention, which are mainly used for the first electrical interface and the second electrical interface, such as between the chip module 27 and the printed circuit board 28 Provides a signal transmission path.

Various specific embodiments of the electrical connector terminal of the present invention will be described in detail below in conjunction with the accompanying drawings.

Fig. 1 shows the first embodiment of the present invention, the electrical connector terminal 20 is integrally formed by a metal sheet, which includes a base 22, a bending portion 23 extending laterally from the side edge of the base 22, and extending upward from the center of the top of the bending portion 23. The extended arm portion 24 , the extension portion 26 parallel to the base portion 22 at the end of the bent portion 23 away from the base portion 22 , and the horizontal welding portion 25 formed by bending the lower end of the base portion 22 .

Please refer to FIG. 3 in conjunction with FIG. 3 , the base portion 22 is in the shape of a plate and extends straight along the vertical direction, and has a plurality of barbs 220 on both sides near the welding portion 25 . One side edge of the base portion 22 is bent transversely to form a curved portion 23 , and the projection of the curved portion 23 on a horizontal plane is “C”-shaped. The center of the top of the “C”-shaped bending portion 23 is bent upwards to form an elastic arm 24 . The elastic arm 24 has an arc-shaped contact portion 240 at its free end for docking with the corresponding conductive element 270 on the chip module 27 . The “C”-shaped curved portion 23 is provided with an extension portion 26 along the vertical direction on a side away from the base portion 22 , and the extension portion 26 is plate-shaped and arranged parallel to the base portion 22 .

The assembly process of the electrical connector terminal 20 in the insulating body 15 will be described below in conjunction with FIGS. On the rear wall (not shown) of the terminal slot 18 , the barbs 220 located on both sides of the base 22 interfere with the side walls (not shown) of the terminal groove 18 respectively. When the electrical connector 10 is assembled, the elastic arm 24 of the electrical connector terminal 20 partially extends out of the receiving surface 150 of the insulating body 15 and extends along the diagonal direction of the terminal groove 18, and the solder ball 29 implanted in the soldering part 25 extends out of the mounting surface 152 of the insulating body 15 and soldered to corresponding solder joints 280 of the printed circuit board 28 . Referring to FIG. 4 , when the electrical connector terminal 20 is completely assembled in the terminal groove 18 , neither the bent portion 23 nor the extension portion 26 contacts the groove wall of the terminal groove 18 .

The plate-shaped base portion 22 and the extension portion 26 arranged in parallel can generate a capacitive effect during signal transmission, thereby adjusting the impedance of the electrical connector terminal 20 to realize the electrical connector terminal 20 and the chip module 27 and the printed circuit board 28. Impedance matching between them to meet the needs of high-frequency signal transmission; in addition, the parallel arrangement of the plate-like base 22 and the extension 26 can also improve the shielding effect of the electrical connector terminal 20, preventing adjacent electrical connector terminals 20 from being Crosstalk that may occur during signal transmission.

5 shows a perspective view of an electrical connector terminal 30 according to a second embodiment of the present invention, which is provided with a plate-shaped base 32 extending in the vertical direction, a bending portion 33 extending laterally from one side of the base 32 , and a self-bending portion 33 An elastic arm 34 extending upward, and a horizontal welding portion 35 placed at the lower end of the base portion 32 . The elastic arm 34 bends and extends upward from the side of the bending portion 33 away from the base portion 32 , and has an arc-shaped contact portion 340 at its freely suspended end. The base portion 32 is provided with a plurality of barbs 320 near the horizontal welding portion 35 to stably hold the electrical connector terminals 30 . The base portion 32 is provided with a connecting portion 36 transversely on the side edge opposite to the curved portion 33 , and a flat plate-shaped extending portion 38 opposite to the curved portion 33 and the elastic arm 34 is formed at the end of the connecting portion 36 in the vertical direction. The plate-shaped extension 38, the base 32, and the curved portion 33 arranged opposite to each other can generate a capacitive effect during signal transmission, thereby adjusting the impedance of the electrical connector terminal 30 to meet the needs of high-frequency signal transmission; in addition, the plate The relative arrangement of the shaped base portion 32 and the extension portion 36 can also improve the shielding effect of the electrical connector terminals 30 and prevent possible crosstalk between adjacent electrical connector terminals 30 during signal transmission.

6 shows a schematic perspective view of an electrical connector terminal 40 according to a third embodiment of the present invention, which is provided with a plate-shaped base 42 extending in the vertical direction, and a bending portion 43 extending laterally on one side of the base 42. The bending portion 43 is located at the An elastic arm 44 is bent upward at an end away from the base 42 , and an arc-shaped contact portion 440 is formed at a suspended free end of the elastic arm 44 . The lower end of the base 42 is bent into a plate-shaped horizontal welding portion 45 , and the base 42 is respectively provided with a plurality of barbs 420 on two sides close to the welding portion 45 . The horizontal welding portion 45 extends upwards with a sheet-like extension 46 . The projection of the extension 46 on the horizontal plane is an “L” shape. Capacitance effects can be generated between the sheet-shaped bending edge 460 and the base 42 and between the sheet-shaped bending edge 462 and the bending portion 43 during signal transmission, thereby adjusting the impedance of the electrical connector terminal 40 and improving the electrical connector. The shielding effect of the terminal 40 prevents signal crosstalk during signal transmission.

7 shows an electrical connector terminal 50 according to a fourth embodiment of the present invention, which includes a plate-shaped base 52 extending in the vertical direction, a bending portion 53 extending laterally from one side of the base 52, and a base away from the bending portion 53. One end of the elastic arm 52 is bent and extended upwards and the arc-shaped contact portion 540 is located at the free end of the elastic arm 54 . The lower end of the base portion 52 is bent to form a horizontal welding portion 55 , and the base portion 52 is respectively provided with a plurality of barbs 520 on two sides adjacent to the welding portion 52 . The welding portion 55 is vertically extended from two side edges of the base portion 52 to form a pair of plate-like extensions 56 , and the extensions 56 extend parallel to the vertical direction. The plate-like extending portion 56 extending in parallel can generate a capacitive effect during signal transmission, thereby adjusting the impedance of the electrical connector terminal 50 and improving the shielding effect of the electrical connector terminal 50 during signal transmission.

It should be noted that although the present invention is only illustrated by taking the LGA-type electrical connector terminal as an example, the technical idea of the present invention is not limited to the LGA-type electrical connector terminal, and can also be applied to other types of electrical connector terminals. Such as BGA type electrical connector terminals and PGA type electrical connector terminals. In addition, in order to obtain better impedance matching between the terminals of the electrical connector and other electrical interfaces, the size and shape of the relative sheet structures can be adjusted or the distance between two sheet structures can be changed.

It should be pointed out that the above descriptions are only some preferred embodiments of the electrical connector terminals of the present invention, and for those skilled in the art, other improvements and deformations made without departing from the principles of the present invention should also be regarded as protection scope of the present invention.

Claims (7)

1. An electrical connector terminal for providing a signal transmission path between a first electrical interface and a second electrical interface, comprising a base extending between the two electrical interfaces, extending from one end of the base to the first electrical interface The first docking portion extending from the interface, and the second docking portion extending from the other end of the base to the second electrical interface, are characterized in that: the electrical connector terminals are provided with at least one pair of oppositely arranged terminals, which can be used during signal transmission. A plate-like structure that produces a capacitive effect. 2. The electrical connector terminal according to claim 1, wherein the first abutting portion comprises a bending portion extending laterally from the side edge of the base portion and an arm portion bending upward from the center of the top end of the bending portion, the The bending part is provided with a plate-shaped extending part parallel to the base on the side away from the base. 3. The electrical connector terminal according to claim 2, wherein the projection of the curved portion on the horizontal plane is "C"-shaped. 4. The electrical connector terminal according to claim 1, wherein the first abutting portion comprises a bending portion extending laterally from the side edge of the base portion and an arm portion bending and extending upward from the bending portion, and the second abutting portion The butt joint is a horizontal weld formed by vertically bending the end of the base, and the horizontal weld extends upward to form a plate-like extension that is opposite to the base and the bend. 5 . The electrical connector terminal according to claim 4 , wherein the sheet-shaped extension portion includes two vertically disposed bent edges, and the projection on the horizontal plane is "L"-shaped. 6. The electrical connector terminal according to claim 1, wherein the first abutting portion comprises a bending portion extending laterally from one side of the base portion and an elastic arm bending upward from the bending portion, the base portion The opposite side of the bent part extends laterally with a connecting part, and the end of the connecting part is provided with a plate-like extending part opposite to the bent part and the elastic arm along the extending direction of the base. 7. The electrical connector terminal according to claim 1, wherein the second abutting portion is a horizontal welding portion formed by vertically bending the end of the base, and two opposite side edges of the welding portion extend upward along the base A pair of parallel plate-shaped extensions are provided extending in the same direction.

Images