CN2391323Y

CN2391323Y - Terminal connector with non-lead wire grid arrangement

Info

Publication number: CN2391323Y
Application number: CN99241978U
Authority: CN
Inventors: 张智凯
Original assignee: TAIJIE ELECTRONICS CO Ltd
Current assignee: TAIJIE ELECTRONICS CO Ltd
Priority date: 1999-08-18
Filing date: 1999-08-18
Publication date: 2000-08-09
Anticipated expiration: 2009-08-18

Abstract

The utility model relates to a connector of an LGA terminal structure. In the utility model, the arrangement mode of terminals is designed into that the periphery of each terminal is provided with six adjacent terminals in the tight alternating expression arrangement to increase the density of the terminals; meanwhile, the upper part of each terminal is designed into an elastic structure and can be directly connected with the contacts of a working element inserted into the connector. The utility model uses the direct pressure generated in the combination to complete the electric connection, and the soldering tin does not need using. Thus, the terminals with various shapes can be designed.

Description

Tool does not have lead-in wire grid terminal connector

The utility model refers to a kind of connector that high density is arranged terminal and is connected with IC (integrated circuit) contact with LGA type (not having lead-in wire grid Leadless Grid Array) that has especially about a kind of design of bonder terminal.

In the integrated circuit structure of Figure 1 and Figure 2, be to be U.S. Pat 5,702,255, it be by lid pull 28, BGA (spherical grid Ball Grid Array) encapsulation (its inside has semiconductor device) 12 and connector body 24 combine.Spherical contact 20 by BGA encapsulation shown in Figure 2 is to be connected with the contact structures (Contact Assemblies) 26 of connector body 24, the below spherical terminal of surface contact structure 26 then contacts with the end pad (Terminal Pads) 14 of circuit board 16, and is installed on the circuit board.This is BGA type (the Ball Grid Array) installation of doing and calling, and existing SMTtype (surface installing type) is more progressive.

The contact pin arrangement mode of general connector as shown in Figure 3, for example above-mentioned U.S. Pat 5,702,255, become the vertical-horizontal linearity to arrange, each contact pin position of circular representative just is respectively to arrange a contact pin position about down thereon, and its unit are utilization rate is 78.54%.In addition at the arrangement mode that Figure 4 shows that utilization rate is higher, linear array on cross spider, just each contact pin position, be that the staggered form that connects a contact pin position on four corners of each contact pin is arranged, its unit are utilization rate also is, 78.54%, and be good than the arrangement mode of Fig. 3; But its utilization rate still remains to be improved.

In addition, employed LGA type (Leadless Grid Array) is a kind of operation element connected mode that does not need scolding tin in the operation element at present, this connected mode has broken through SMT or the essential situation of welding of BGA mode in the past, and the method for attachment that changes with the forward contact replaces.The method is not only simplified ways of connecting, more can significantly improve the qualification rate when connecting, and also the part of BGA type can be applied to the connector of LGA type.And the contact mode of its operation element of LGA has two kinds, i.e. ball-type formula (Ball type) and plane formula (Plane type), for example Figure 10 A and Figure 10 B.They all utilize contact C1 and C2 to be connected in no scolding tin mode with bonder terminal.

Main purpose of the present utility model is that a kind of tool LGA terminal connector is being provided, wherein the contact pin position of connector is to arrange with the alternating expression high density, the unit's of making usable floor area can reach 90.69%, to increase the distance between pin and the pin, reduce the generation of noise (Noise), to meet the application of high frequency CPU.

The terminal of the staggered arrangement mode that the utility model adopted, the computer components that can be applicable to generally know, and be connected with PCB.

A purpose more of the present utility model is that a kind of tool LGA terminal connector is being provided, wherein the terminal of connector is to adopt the LGA formula, it is to be designed to have elastic part above pin, makes the spherical contact of operation element closely to contact with positive pressure with the elastic part of terminal.

In addition, according to a last purpose, the utility model is designed multiple different terminal shape, and wherein a class elastic part is a plane formula, and another kind of elastic part is three-dimensional.

Above-mentioned purpose of the present utility model is realized by following technical proposals.

A kind of tool LGA terminal connector comprises at least: a plastic cement body, and it is to have a plurality of terminal holes, and each terminal hole can insert a terminal, and this terminal pin protrudes in the body bottom surface downwards, and the terminal top is positioned to be connected with the contact of operation element in this terminal hole; It is characterized in that: wherein the top of terminal is an elastic part, is connected with operation element in no scolding tin mode.

The utility model also can replenish following content in implementation process except that above-mentioned essential features:

Wherein the upper end of the elastic part of terminal slightly exceeds the end face in body; The elastic part of terminal is plane formula design, be that the continuous bend shape constitutes or the oblong shape that is a hollow or by two height different bend right and left constitute; The elastic part of terminal can also be a kind of oblique N type design, and the bending of this oblique N type elastic part top can also make little than the below; The terminal elastic part also can be to be formed by connecting with bend by the twice level, and wherein the level of top is made shorter; Or the elastic part of terminal is the rhombus of hollow; Or the elastic part of terminal is formed by two rhombuses that are connected; Or the elastic part of terminal is to be formed by two and half diamond, and Shang Fang rhombus transverse axis is short more more.

The elastic part of terminal is a three-dimensional design, and the elastic part of this terminal is made of a hook body; Or constituted by two staggered hooks; Or constituted by continuous bending shape.

This tool LGA terminal connector, the arrangement of terminal are to plant six terminals for adjacent cloth around each terminal, so that the highest unit are utilization rate to be provided.

Advantage of the present utility model is: the tool LGA terminal connector that is provided, and the pin density height, and via the design of special terminal, can reach no scolding tin and be connected with operation element.

Below in conjunction with drawings and Examples architectural feature of the present utility model and use effect are described further:

Description of drawings:

Fig. 1 is a kind of BGA connector construction of knowing.

Fig. 2 is the profile of Fig. 1.

The contact pin schematic diagram that Fig. 3 arranges for orthoscopic.

The contact pin schematic diagram that Fig. 4 arranges for staggered form.

The schematic diagram that Fig. 5 arranges for the utility model contact pin.

Fig. 5 A is contact pin mode and practical application schematic diagram.

Fig. 6 A is the generalized section of the utility model connector, and wherein operation element does not engage with connector as yet.

Fig. 6 B be Fig. 6 A vertically to cutaway view.

Fig. 7 A is the generalized section of the utility model connector, and wherein operation element engages with connector.

Fig. 7 B be Fig. 7 A vertically to cutaway view.

Fig. 8 A to Fig. 8 I is different terminal design figure of the present utility model, and elastic part wherein is a plane formula.

Fig. 9 A to Fig. 9 G is different terminal design figure of the present utility model, and elastic part wherein is three-dimensional.

Figure 10 A is that LGA connection operation element is the contact of spherical formula.

Figure 10 B is that LGA connection operation element is the contact of plane formula.

Main improvement part of the present utility model has two, one, and the arrangement mode in the contact pin position, another part are on the profile of terminal.

See also Fig. 5, wherein each circle has represented a contact pin position to show the arrangement mode of the utility model contact pin; Wherein the contact pin position is that just cloth is planted six equal contact pins around each contact pin with alternating expression row example, and shown in Fig. 5 A, can calculate the unit are utilization rate is 90.69%, is height far beyond the arrangement mode of knowing.Such alternating expression arrangement mode can have the highest pin count.For example, needed pin number is 400, and step pitch (pitch) is 1.27 o'clock, and required area is 580mm ², taking volume and can dwindle, this is to stressing the computer equipment of miniaturization at present, and for example notebook type (notebook) etc. is comparatively favourable.

(layout) mode that is staggered that the utility model uses can increase the density of contact pin, or increases the distance between pin and the pin, to reduce the generation of noise (Noise), to meet the application of high frequency central processing unit.

Contact pin staggered pattern of the present utility model, connector can adopt LGA (Leadless GridArray) mode, and are applied to below will give explanation in the operation element of CPU and so on.

As shown in Figure 6A, connector plastic cement body 1 of the present utility model has terminal hole 11, provides the insertion of terminal 2 to settle.And terminal 2 is divided into two parts, the one, pass the pin 21 of plastic cement body 1 bottom surface 12, and it is connected with circuit board; Another part then is the elastic part 22 of pin 21 tops, is to be combined in the terminal hole 11 of body.

Wherein, each circle shown in above Fig. 6 A is to represent a contact pin position, the just installation position of terminal 2.When shown in Fig. 6 A and Fig. 6 B, when operation element 3 was not engaged on the connector 1 as yet, the elastic part of terminal top was the little end face 13 that is higher than connector; Such design mainly is the contact 31 that improves operation element 3 positive pressure when contacting with elastic part 22, and can guarantees accurate stable connection.

See also Fig. 7 A and Fig. 7 B again, when operation element 3 is combined on the connector 1, because the positive pressure that when combination, produces shown in the direction of arrow among the figure in 3 pairs of connectors of operation element 1, make the contact 31 of operation element oppress elastic part 22 tops of terminal downwards, so, can guarantee that electric connection is normal.

Terminal shown in Fig. 6 A elastic part 22 be that sheet by continuous bend is constituted, make this part after combination, compression shown in Fig. 7 A, reaches no scolding tin connected mode LGAtype in terminal hole 11, SMT that knows or BGA mode are good.

Certainly, the shape of terminal, it is curved also not necessarily to be limited to the Curved Continuous shown in Fig. 6 A, so long as when when the combination of the contact of operation element, producing positive pressure, the elastic portion branch of this terminal to the terminal hole 11 of body axially inwardly compression get final product., all be adoptable shape for example at A to I shown in Figure 8.For example shown in Fig. 8 A, elastic part is the oblong shape of a hollow; For example shown in Fig. 8 B, wherein elastic part is to be made of the different institute that bends right and left of two height; Shown in Fig. 8 C, be to be a kind of oblique N type design for example; For example Fig. 8 D then is the variation of Fig. 8 C, and wherein tiltedly the bending of N type top is less; Shown in Fig. 8 E, be to be formed by connecting with bend, and the level wherein is shorter by the twice level; Or, be the rhombus of hollow as Fig. 8 F; Or, then formed by two rhombuses that are connected as Fig. 8 G; As Fig. 8 H, then be to form by two and half diamond; Fig. 8 I then is Fig. 8 H deformation design, and wherein the rhombus transverse axis of top is short more more.More than these all belong to plane formula design.

Shown in Figure 9, then be the design of stereo-elastic part terminal.Wherein the elastic part shown in Fig. 9 A, the B then is made of a hook body; Shown in Fig. 9 C, the D, then constituted by two staggered hooks; Fig. 9 E, F, G are then constituted by bending shape continuously.

At the operation element shown in Fig. 6 A, be contact for sphere, but the utility model also can with the combination of plane formula contact shown in Figure 10 B, this is foolproof replacement.

Claims

1, a kind of tool does not have lead-in wire grid terminal connector, at least comprise: a plastic cement body, it is to have a plurality of terminal holes, each terminal hole can insert a terminal, this terminal pin protrudes in the body bottom surface downwards, and the terminal top is positioned to be connected with the contact of operation element in this terminal hole; It is characterized in that: wherein the top of terminal is an elastic part, is connected with operation element in no scolding tin mode.

2, do not have lead-in wire grid terminal connector according to the described tool of claim 1, it is characterized in that: wherein the elastic part of terminal upper end slightly exceeds end face in body.

3, do not have lead-in wire grid terminal connector according to the described tool of claim 2, it is characterized in that: wherein the elastic part of terminal is the shape formation of continuous bend.

4, do not have lead-in wire grid terminal connector according to the described tool of claim 1, it is characterized in that: wherein the elastic part of terminal is plane formula design.

5, do not have lead-in wire grid terminal connector according to the described tool of claim 4, it is characterized in that: wherein the elastic part of terminal is the back-shaped shape of length of a hollow.

6, do not have lead-in wire grid terminal connector according to the described tool of claim 4, it is characterized in that: wherein the elastic part of terminal is to be made of the different institute that bends right and left of two height.

7, do not have lead-in wire grid terminal connector according to the described tool of claim 4, it is characterized in that: wherein the elastic part of terminal is a kind of oblique N type design.

8, do not have lead-in wire grid terminal connector according to the described tool of claim 7, it is characterized in that: the bending of the oblique N type elastic part top of terminal little than the below wherein.

9, do not have lead-in wire grid terminal connector according to the described tool of claim 4, it is characterized in that: wherein the terminal elastic part is to be formed by connecting with bend by the twice level, and the level wherein is shorter.

10, do not have lead-in wire grid terminal connector according to the described tool of claim 4, it is characterized in that: wherein the elastic part of terminal is the rhombus of hollow.

11, do not have lead-in wire grid terminal connector according to the described tool of claim 4, it is characterized in that: wherein the elastic part of terminal is formed by two rhombuses that are connected.

12, do not have lead-in wire grid terminal connector according to the described tool of claim 4, it is characterized in that: wherein the elastic part of terminal is to be formed by two and half diamond.

13, do not have lead-in wire grid terminal connector according to the described tool of claim 12, it is characterized in that: wherein the rhombus transverse axis of top is short more more for the elastic part of terminal.

14, do not have lead-in wire grid terminal connector according to the described tool of claim 1, it is characterized in that: wherein the elastic part of terminal is a three-dimensional design.

15, do not have lead-in wire grid terminal connector according to the described tool of claim 14, it is characterized in that: wherein the elastic part of terminal is made of a hook body.

16, do not have lead-in wire grid terminal connector according to the described tool of claim 14, it is characterized in that: wherein the elastic part of terminal is constituted by two staggered hooks.

17, do not have lead-in wire grid terminal connector according to the described tool of claim 14, it is characterized in that: wherein the elastic part of terminal is constituted by bending shape continuously.

18, do not have lead-in wire grid terminal connector according to the described tool of claim 1, it is characterized in that: wherein the arrangement of terminal is to plant six terminals for adjacent cloth around each terminal.