CN2655448Y - Conductive terminal - Google Patents

Abstract

A conductive end is used to be positioned inside an insulation body to form an electric connector, wherein the insulation body forms a first face and a second face in opposite with the first face, the insulation end forms a touching end which projects the first face and a welding end which projects the second face to lead to the touching end electrically connected with an electric assembly, and the welding end is electrically connected with a circuit board through welding materials. The end edge of the welding end forms a fork shape, when the welding end is contacted with the corresponding welding materials, the welding end and the welding material surface form at least two contact points to prevent that the relative position is changed on the welding end and the welding materials, and to ensure the welding end pierced to the welding materials after the welding materials are melted, and the welding materials are planted on the welding end after being cooled and hardened.

Description

Conducting terminal

Technical field

The utility model relates to a kind of conducting terminal, is meant that especially a kind of confession one scolder plants the conducting terminal that connects.

Background technology

Known to central processing unit integrated circuit (IC) chip such as (CPU), because processing speed and function have the development trend of becoming stronger day by day, therefore chip externally carries out signal to export the electrical contact of (I/O) will be more and more many, it is compact that yet its volume after being encapsulated but requires, event has been adopted pin grid PGA (Pin Grid Array) all as the encapsulation of the integrated circuit (IC) chip of central processing unit equal altitudes densification design, ball grid is arranged BGA (Ball Grid Array), even ground grid LGA packaged types such as (Land Grid Array), but no matter which kind of packaged type is integrated circuit (IC) chip adopt, all must utilize an electric connector and a circuit board to electrically connect, therefore, in order to make electric connector cooperate the packaged type of integrated circuit (IC) chip, and steadiness and the processing procedure efficient of considering mutual electric connection between electric connector and circuit board, so generally one of each conducting terminal is held the tin ball that connects a correspondence in electric connector, utilizing surface adhering method (SMT) that electric connector is welded in way on the circuit board again, is to electrically connect the manufacture method of often using for producing between electric connector and circuit board now.

As Fig. 1, be among expression one encapsulates in the PGA mode central processor 7 by an electric connector 8 and a circuit board 9 electric connections, wherein, central processing unit 7 is forming the pin 71 that a plurality of uniformly-spaced distances are arranged and protruded downwards in the certain area in its bottom surface after the encapsulation, electric connector 8 then includes an insulating body 81 and a plurality of corresponding pins 71 positions and runs through the containing hole 82 of insulating body 81 upper and lower surfaces, each containing hole 82 all can be accommodated a conducting terminal 83, on circuit board 9, then design the electrical contact 91 that corresponding conducting terminal 83 positions are arranged in addition in advance, electrically contact the corresponding pin 71 of central processing unit 7 by the upper end that is contained in the interior conducting terminal 83 of insulating body 81, the lower end then connects the electrical contact 91 that is positioned on the circuit board 9 accordingly, makes that central processing unit 7 is able to electrically connect to transmit electric signal with circuit board 9.

As Fig. 2, brought forward is described, for the lower end that makes conducting terminal 83 can utilize the surface adhering method to link to each other with 9 of circuit boards, the lower end of conducting terminal 83 must connect a tin ball 84 earlier, make the tin ball 84 that is attached to conducting terminal 83 lower ends after contact circuit plate 9, carry out reflow (Reflow), can electrically connect conducting terminal 83 and circuit board 9 by mat tin ball 84.But how exactly tin ball 84 to be attached in advance conducting terminal 83 lower ends, must to solve many problems on the practice of processing procedure, one of them is the location of tin ball 84.And as shown in the figure, existing a kind of way is that surface 812 forms a corresponding mating surface 813 that communicates with containing hole 82 and inwardly be the spherical arc shape recess under insulating body 81, conducting terminal 83 lower ends then form a carrier 831 of fitting with mating surface 813, make mating surface 813 and carrier 831 formations one and tin ball 84 surperficial contacted recesses, with location tin ball 84, and tin ball 84 also can electrically contact with the carrier 831 of conducting terminal 83 by recess.And only be to illustrate wherein a kind of way at this, insulating body 81 or conducting terminal 83 also can adopt other kind kenel certainly wherein, but basic spirit is, can interfere the structure of locating by the insulating body 81 or the change of conducting terminal 83 ends with 84 generations of tin ball to constitute one.

As Fig. 3, in response to insulating body 81 and conducting terminal 83 are located the change of being done for tin ball 84 as shown in Figure 2, when carry out tin ball 84 plant the ball processing procedure time, be after conducting terminal 83 is assembled in insulating body 81, the lower surface 812 of insulating body 81 is overturn up, cause a end that conducting terminal 83 preparation is connected with tin ball 84 also up simultaneously, utilize a spacer 85 to be covered in lower surface 812 tops of insulating body 81 again, and spacer 85 is provided with a plurality of corresponding conducting terminals 83 positions and can hold the perforation 851 that tin ball 84 passes through, the carrier 831 that makes conducting terminal 83 851 reveals because of boring a hole, number is moved around on spacer 85 far more than the tin ball 84 of perforation 851 numbers, making tin ball 84 can utilize gravity to fall in the perforation 851 naturally contacts with conducting terminal 83, again unnecessary tin ball 84 is made by oneself on the bit slice 85 and removed, perhaps utilizing alternate manner that tin ball 84 is inserted in the perforation 851 one by one makes it contact with conducting terminal 83, the step of carrying out reflow and removing spacer 85 afterwards makes tin ball 84 to interconnect with corresponding conducting terminal 83 and reaches the purpose of accurately planting ball.

Yet, though this plantation ball processing procedure has solved the problem of tin ball 84 with conducting terminal 83 mutual location, but because the carrier 831 of conducting terminal 83 only is to utilize the mode of surface contact to be connected with tin ball 84, the steadiness aspect that makes tin ball 84 connect is not easy control, in case tin ball 84 the welding really then easy formation defective products with conducting terminal 83 disengagings not.

Because scolders such as known electric connector and tin ball are being planted the shortcoming that connects on the processing procedure, the applicant proposes a kind of preferable scolder and plants the method for connecing, it mainly is that welding ends with conducting terminal forms connection in the mode in the tin ball that thrusts fusing, and this method is filed an application in separate case.

But as shown in Figure 5, the main spirit of planting the method for connecing of utilizing the applicant to invent, if with the simple spininess that forms of the welding ends 862 last edge of conducting terminal 86 with single cusp, and when desiring corresponding tin ball with one 84 and connecting in the mode of thrusting, because tin ball 84 surfaces are spherical, have slightly with fusing not and will only have single contact point when the surface of tin ball 84 of hardness contacts when being spiny welding ends 862, but single contact point is not a stable poised state between spiny welding ends 862 and tin ball 84, especially conducting terminal 86 is bestowed one when strength that tin ball 84 directions are thrust, with the direction skew that quite easily causes tin ball 84 to arbitrary side, the phenomenon that makes tin ball 84 after the welding have off normal takes place, and therefore is necessary further to improve at the shape of the welding ends 862 of conducting terminal 86.

The utility model content

Therefore, the purpose of this utility model is to provide a kind of and can stably contacts with scolder and and then thrust in the scolder and plant the conducting terminal that connects for scolder.

The utility model provides a kind of conducting terminal, be used to be positioned in the insulating body to constitute an electric connector, otherwise this insulating body be formed with one first and one with this first second mutually, this conducting terminal then is formed with one and protrudes from this contact jaw of first and one and protrude from this welding ends of second, this contact jaw and an electronic building brick are electrically connected, this welding ends is mat one scolder and circuit board electric connection then, wherein, this welding ends not edge forms fork-shaped, at this welding ends during with corresponding this scolder contact, this welding ends and this solder surface constitute at least two contact points and change relative position to prevent this welding ends and this scolder, and after this scolder melted by heat, this welding ends is thrust in this scolder, and be connected on this welding ends back the planting in the coating mode of this solder cools sclerosis.

Effect of the present utility model is, the fork-shaped that mat welding ends end edge is formed, at welding ends during with the contact of corresponding scolder, welding ends and solder surface can constitute at least two contact points and change relative position to prevent welding ends and scolder, and after the scolder melted by heat, be beneficial to welding ends is thrust in the scolder, plant and be connected on the welding ends and after the solder cools sclerosis, be able to the coating mode.

Description of drawings

Fig. 1 is a three-dimensional exploded view, and the example of an electronic building brick mat one electric connector and a circuit board electric connection is described;

Fig. 2 is a partial schematic sectional view, and the annexation of a known a kind of conducting terminal and a tin ball is described;

Fig. 3 is a schematic diagram, and the electric connector of key diagram 2 is in planting configuration when connecing the tin ball and the syntagmatic of using a spacer;

Fig. 4 is a stereogram, illustrates that schematically one has the conducting terminal of unicuspid point and being connected of a tin ball;

Fig. 5 is a side schematic view, the off normal state of this tin ball possibility when the conducting terminal of key diagram 4 contacts with the tin ball;

Fig. 6 is a stereogram, illustrates that the assembling of first preferred embodiment of the utility model conducting terminal and an insulating body is to constitute the enforcement style of an electric connector;

Fig. 7 is this first preferred embodiment constructing stereo figure;

Fig. 8 is an action schematic diagram, and the syntagmatic of an electric connector and a tray is described;

Fig. 9 is with one of the represented action of the mode of side partial cross-sectional schematic diagram, illustrate that the tin ball softens before, the welding ends of this first preferred embodiment conducting terminal and the contact relation of tin ball;

Figure 10 is another angle schematic diagram when the conducting terminal welding ends contacts with the tin ball among Fig. 9;

Figure 11 is with one of the represented action of the mode of side partial cross-sectional schematic diagram, and the welding ends of the conducting terminal after the tin ball softens and the annexation of tin ball be describeds;

Figure 12 is a stereogram, and second preferred embodiment of the utility model conducting terminal is described;

Figure 13 is a stereogram, and the 3rd preferred embodiment of the utility model conducting terminal is described; And

Figure 14 is a stereogram, and the 4th preferred embodiment of this novel conductive terminal is described.

Embodiment

About aforementioned and other technology contents, characteristics and effect of the present utility model, in the detailed description of following cooperation several preferred embodiments with reference to the accompanying drawings, can clearly understand.

And several following preferred embodiments of conducting terminal of the present utility model are to plant the method for connecing with the scolder that the applicant is applied in separate case to describe, this method provides an electric connector and a plurality of scolder (not shown) welding as the tin ball, in the following description, the form of scolder is represented with the tin ball, but in fact not as limit, and tin ball also non-is decided to be sphere, and conducting terminal and tin ball plant the method that the method for connecing also can not adopted the applicant and invented.

Consult Fig. 6 and Fig. 7, the conducting terminal 12 of the utility model first preferred embodiment is to adopt the kenel of a plurality of (only draw single conducting terminal 12 on the figure and be representative) to be positioned in the insulating body 11 to constitute an electric connector 1.

Insulating body 11 generally is a cuboid, on the contrary its be formed with one first 111 and one with first 111 second 112 mutually, make the containing hole 113 that is provided with first 111 and second 112 of a plurality of perforations in the insulating body 11.Insulating body 11 among the figure only shows the containing hole 113 of minority as representative, and the number of containing hole 113 numbers is on deciding as the pin of electronic building brick (not shown) such as central processing unit or the number of electrical contact that institute's desire connects.

Conducting terminal 12 (with reference to shown in Figure 7) is formed by the punching out of metal lamellar body, it has one from lower end bending and the welding ends 122 of contact jaw 121 and an extension downwards of extension up, it can be assembled in the containing hole 113 of insulating body 11, contact jaw 121 generally is configured as the elastic arm form of a bending, welding ends 122 last edge then are configured as a fork-shaped with two tips 123 with the triangular shaped recess shape, make contact jaw 121 protrude from first 111 outer in order to contact with the electronic building brick (not shown), welding ends 122 then protrudes from second 112 and forms electric connection in order to connect the tin ball with circuit board (figure does not show) outward.

During application, after a plurality of conducting terminals 12 are assembled in the insulating body 11, make the welding ends 122 of conducting terminal 12 all protrude from second 112 outer (as shown in Figure 9) of insulating body 11, and make first 111 of insulating body 11 and second 112 direction configuration down up.

Simultaneously with reference to figure 8 and Fig. 9, prepared beforehand has a tray 2, the upper surface of tray 2 forms a recess 21 respectively corresponding to the position of the welding ends 122 of each conducting terminal 12, make each recess 21 in order to ccontaining location one tin ball 3, in this example, the general hemispheric concave surfaces that form with tin ball 3 couplings in the recess 21 can make tin ball 3 stay in the recess 21 and can arbitrarily not break away from recess 21.In addition, the kenel of tray 2 coordinated insulation body 11 rectangular bodies on the face that is formed with a plurality of recesses 21 more is provided with four restriction guide blocks 22, each limits guide block 22 and all stretches out certain distance so that L shaped section is convex, and make and respectively to limit medial surface that guide block 22 is 90 degree angles all generally towards the shape center of tray 2, four restriction guide blocks 22 all can be relatively and four corner EDGE CONTACT of insulating body 11 rectangles, in other words, mat four restriction guide blocks 22 constitute the activity space of a strangulation insulating body 11.

, make the welding ends 122 that be assembled in conducting terminal 12 insulating body 11 in by the accommodating device (not shown) that have scaling powder, make the welding ends 122 of these conducting terminals 12 all attach a certain amount of scaling powder thereafter.

As Fig. 8, make tray 2 dispose in horizontal direction, it is positioned with one of a plurality of tin balls 3 and faces up, make whole electric connector 1 be positioned at tray 2 tops, insulating body 11 is protruding with second 112 of welding ends 122 of a plurality of conducting terminals 12 down, and draw or electric connector 1 is placed in the activity space that four restriction guide blocks 22 are formed in the mode of manually taking with automation equipment, using guiding insulating body 11 only can move up at upper and lower, and can not move with respect to tray 2 towards the side to the left or to the right, when electric connector 1 no longer is subjected to automation facility or manpower and supports, the weight of electric connector 1 self will make that second 112 surface to a plurality of tin balls 3 of being positioned with of tray 2 of a plurality of welding endss 122 of being protruding with of insulating body 11 is approaching, up to two tips 123 of the welding ends 122 last edge of conducting terminal 12 respectively with corresponding tin ball 3 surface contacts (as Fig. 9 and shown in Figure 10), since the welding ends 122 last edge with two tips 123 with can produce two contact points simultaneously after tin ball 3 spherical surfaces contact, the pressure average mark that makes welding ends 122 bestow tin ball 3 surfaces is dispersed in 123 places, tip and becomes stable poised state, change relative position, the location that can guarantee in successive process tin ball 3 with respect to conducting terminal 12 in the instant of contact so can prevent tin ball 3.

At last, to tray 2 heating, make the tin ball 3 that is positioned on the tray 2 soften or fusing, again by the weight of electric connector 1 self, make welding ends 122 gravitates of each conducting terminal 12 and thrust the corresponding tin ball 3 interior (as shown in figure 11) of softening or fusing, but treat the welding ends 122 of coated with conductive terminal 12 after 3 hardenings by cooling of tin ball and form affixed, electric connector 1 can be taken out on tray 2 afterwards, tray 2 connects the processing procedure repetitive cycling and uses with then can planting for the tin ball of another electric connector 1 after electric connector 1 separates.

For another the conducting terminal 13 shown in Figure 12 second preferred embodiment, its welding ends 132 also is formed with two tips 133, and only be that with the first preferred embodiment difference welding ends 132 last edge are that curved concavity is to form two tips 133, all the other effects are then identical with first preferred embodiment, repeat no more in this.

Conducting terminal 14 shown in Figure 13 the 3rd preferred embodiment for another example, its welding ends 142 is to constitute two tips 143 with two chevrons, act on identical with previous embodiment, in addition, welding ends 142 also further is provided with a perforation 144, purpose is to attach in the process of scaling powder at welding ends 142, setting by perforation 144 can provide the scaling powder of more amount to adhere to, help improving the connection performance of 3 in welding ends 142 and tin ball, on the other hand, in the time of in welding ends 142 thrusts the tin ball 3 that melts, the material of tin ball 3 also can infiltrate in the perforation 144, treat significantly to increase after tin ball 3 cools off firmly admittedly the interference effect of tin ball 3 and welding ends 142, promote the steadiness that both connect.

The conducting terminal 15 shown in Figure 14 the 4th preferred embodiment and for example, except that welding ends 152 has two tips 153, and at two tips, the 153 middle flutings 154 that are provided with an above-below direction extension, fluting 154 effect is identical with the effect of aforementioned perforation 144, and the scaling powder that provides more amount adheres to and increases itself and the steadiness that is connected of welding ends 152.

Conclude above-mentioned, conducting terminal of the present utility model, shaped design by its welding ends, when contacting, can form the poised state of two contact points at least with scolder, cause both locational skews when preventing welding ends contact scolder and keep relative positioning, and be beneficial to follow-up welding ends thrust form in the scolder affixed, so can reach the purpose of the utility model really.

Only the above person only is this new practical preferred embodiment, when the scope that can not limit the utility model enforcement with this.

Claims (3)

1. conducting terminal, be used to be positioned in the insulating body to constitute an electric connector, otherwise this insulating body be formed with one first and one with this first second mutually, this conducting terminal then is formed with one and protrudes from this contact jaw of first and one and protrude from this welding ends of second, this contact jaw and an electronic building brick are electrically connected, this welding ends is mat one scolder and circuit board electric connection then, it is characterized in that:

This welding ends end edge forms fork-shaped, at this welding ends during with corresponding this scolder contact, this welding ends and this solder surface constitute at least two contact points and change relative position to prevent this welding ends and this scolder, and after this scolder melted by heat, this welding ends is thrust in this scolder, and be connected on this welding ends back the planting in the coating mode of this solder cools sclerosis.

2. conducting terminal according to claim 1, it is characterized in that, this welding ends also is provided with a perforation, and the scaling powder that more amount is adhered in this perforation is connected with this scolder for this welding ends, and strengthens the steadiness that is connected of this scolder and this welding ends behind this solder fusing for its infiltration.

3. conducting terminal according to claim 1, it is characterized in that, this welding ends also is provided with a fluting, and the scaling powder that this fluting adheres to more amount is connected with this scolder for this welding ends, and strengthens the steadiness that is connected of this scolder and this welding ends behind this solder fusing for its infiltration.

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