KR200229127Y1 - The mechanism of bga socket - Google Patents

Abstract

The present invention mainly relates to a socket applicable to a test of a memory IC, and more particularly to a structure of a socket for testing a ball grid array (BGA) IC, and designed to improve the productivity and quality of the socket. It's about structure.

Description

The structure of the BIJIE socket {THE MECHANISM OF BGA SOCKET}

The present invention relates to a socket of a ball grid array (BGA) type IC, and the IC socket is a device generally required for testing a memory IC, and is referred to as an IC socket or a burn-in (B / I) socket (hereinafter referred to as a socket). . During IC testing, burn-in boards equipped to solder multiple sockets and I / O terminals formed on the burn-in boards can be used to input / output required power and signals. A series of IC test systems are provided with in-chamber or peripheral and measuring devices.

Among the IC package shapes, BGA (Ball Grid Array) has the shape shown in FIG. 1, and unlike other types of ICs, the IC's size and thickness are innovatively arranged by arranging the terminals, or balls, of the IC on the entire bottom surface of the IC. Say improvement. In the BGA IC, the spacing (e) between the balls is typically 0.5mm, 0.75mm, 0.8mm, 1.0mm, 1.27mm, 1.6mm, and the diameter of the ball (b) is about 0.3mm to 0.9mm. The height (A1) of the ball at the bottom of the IC is from 0.2mm to 0.6mm. The smaller the pitch between the balls, the smaller the diameter and height of the ball.

Hereinafter will be described with reference to the accompanying drawings. In the following description of the reference numerals to the components of the drawings, it should be noted that the same reference numerals as much as possible even if displayed on different drawings. In addition, in describing the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, the terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users or semiconductor development or production related persons, and the definitions should be made based on the contents throughout the present specification.

The BGA socket is generally shown in FIG. 2, and the pins of the contacts 90 and the pins of the contacts that can electrically contact the balls 3 of the IC 1 one by one are clearly connected. It is configured to be soldered to the chip, and is configured to repeatedly process IC tests.

A general BGA socket will be described with reference to FIGS. Referring to the configuration of the socket in FIG. 2, the body 10 and the slide 20 are positioned thereon, and two holders 40 are provided on both sides of the slide to prevent the IC from escaping upward during IC loading. In addition, the spring 30 is installed below the holder so that the force is always applied in the direction in which the holder is closed. IC adapter 50 is located on the upper side of the slide, and serves to guide the seating of the IC up, down, front, rear, left and right when loading the IC. The cover 60 is located above the body and forms a square hole in the center so that the IC adapter is positioned inside thereof, and is provided to be operated up and down. Holes are formed below the four corners of the cover to accommodate the cover spring 100, and four holes are also formed in the body to serve as guides of the springs, thereby serving to return the cover to the springs. do. Contact guide holes are formed in the body to allow the insertion of a plurality of contacts from the bottom up to accommodate the contacts, and below the fixing plate 70 for regulating the up and down position of the contact and fixing the shaking, The soldering pins of the contact pass through and holes are formed to hold the contact body. And below it is provided with a pin guide 80, a guide hole for positioning the contact pin to facilitate the insertion of a plurality of contact soldering pins into the corresponding pin holes (5) of the PCB shown in FIG. In the completed socket state, the pin guide is configured to be operated up and down slightly above the end position of the contact pin and the stand-off surface formed on the bottom of the body. When inserting the socket into the PCB, the pin guide is moved downward. After lowering to regulate the front, rear, left and right positions of the contact pins, all pins are inserted into the pin hole formed in the PCB without jamming.

Figure 3 is a development of the components of the BGA socket, the contact 90 is a heat treatment and a gold plating process is generally performed by pressing a sheet of copper alloy. The other parts, except for the springs 30 and 100, are formed by injection molding the material into engineering plastics.

Figure 4 shows the pattern of the burn-in PCB to solder the completed socket, the socket body outline (7), the guide hole (6), the contact pin hole (5), which will be inserted into the guide pin configured under the socket body, And a stand-off seat 8, etc. of the body.

Referring to the operation of the general BGA socket through Figure 5, step 1 is the natural state of the socket, as shown in the detailed view, the inner side (92A, 92B) of the two ends of the contact close to the side of the slide particles 21 I'm in contact. At this time, the inner gap L1 of the two ends of the contact is configured to be smaller than the diameter of the soldering ball 2 of the IC. Herein, the structure of the slide 20 will be described in more detail. In the center of FIG. 2, many rectangles are continuously arranged at an angle of 45 degrees from the upper left to the lower right. The particle 21 is formed between the rectangular hole and the rectangular hole, and penetrates through the fixed side end 91A and the movable side end 91B of the contact through both rectangular holes, and is not shown in the accompanying drawings. 2 or 3 inclined cams formed on the cover, however, are configured to move the slide horizontally when the cover is pressed. The amount of movement is configured so that the distance L2 of the contact end is opened slightly larger than the diameter of the solder ball 2 of the IC, and the moving direction is the movement of the contact as shown in the detailed view of FIG. 5 (step 2). The end of the contact is opened by pushing the inner side 92B of the side. Therefore, it should be noted that the detailed views show a part of the cross-section K-K in FIG. 2, and the cross-sections and contacts shown after FIG. 6 are also in the same direction.

In step 2, the holder pressing projection 61 formed in the cover is pressed out while rotating the IC holder 40 about the shaft 42 by pressing the lever 41 of the holder. After that, the IC is dropped into the IC adapter 50. At this time, the inclined cam formed on the cover is configured to push the slide in the minute amount horizontal direction as described above, so that the slide particles push the inner side of the movable side of the contacts to sufficiently accommodate the solder balls of the IC as shown in the detailed view. In this state, the solder balls of the IC are received between the two ends 91A and 91B.

(Step 3) is a step of restoring the pressed cover. As the holder 40 is closed, the upper surface 4 of the IC is pressed, and the two ends of the contact are closed as the slide moves back to its original position. The electrical contact makes the IC ready for testing.

Referring to Figure 6 to 8 with respect to the structure of the conventional socket, Figure 6 is a partial cross-sectional view of the first state in which the contact (90) can be inserted from the bottom up in the state in which the slide 20 is assembled to the body (10) It is shown. Although not shown in the drawings, the slides are provided with a plurality of hooks so that there is no play in the vertical direction as the plurality of sliding protrusions 23 formed on the slides adhere to the sliding surfaces 19 of the body. And, the body accommodates the hook, but is configured to move as much as a small amount, that is, the amount of slide movement. Inserting the contact takes the most time in assembling the socket. In general, inserting the contact inserts the contact upside down while the slide is assembled to the body. However, since the contact is small in size and the insertion holes 11 are also small and compactly arranged, the work is difficult and time consuming. Depending on the type of socket, it takes more than an hour to insert and insert hundreds of contacts into tweezers. After inserting all the contacts into the slide assembled body in Figure 6 to assemble the fixing plate 70 to secure the contacts, and then to assemble the remaining remaining socket parts to complete the socket.

FIG. 7 illustrates in more detail the partial cross-sectional shape of how the shape and shape of the holes into which the contacts are assembled in the slide-assembled body of FIG. 6 is constructed. In the body structure of a conventional socket, as shown in the front view of the guide hole for receiving a contact, two holes, that is, a fixed side hole 12 and a movable side hole 13 are formed at the bottom of the body, and the particles therebetween. (15) is formed. Contact guide hole 11 is configured to be united as one goes up the sliding surface 19, which is the upper surface of the body. The wall 16 formed out of the fixed side hole 12 is formed vertically, and the wall 17 formed out of the movable side hole 13 is inclined to form a wider guide hole 11 upward. have. This is a feature of the contact guide hole structure of the body in conventional sockets. In FIG. 7, the cross-sectional structure of the slide 20 includes a space 22 formed to receive a contact to avoid interference in operation, and a particle 21 to maintain an initial distance between the ends of the contact and to push the movable side to open. have.

8 shows a structure of a conventional contact, in which a contact pin 99 is formed to be elongated downward, and an upper end 96 and a lower end 98 are formed on the body 97 and the upper and lower ends thereof. The fixed side 93A is formed on the left side and the movable side 93B is formed on the right side, and the upper side of the contact is a portion having a slightly thinner thickness, and the inner side thereof is a part in contact with the particles 21 of the slide. ) And the movable side contact portion 92B, and the ends of the two contacts are formed so that the fixed side tip 91A and the movable side tip 91B are precisely formed, similarly to the shape where the two canines are attached. It is configured to be in electrical contact by biting. As a feature of the conventional contact, the fixed side which forms the bent portion 95 so that the shape of the movable side 93B starts from the body 97 and becomes wider than its width Y4 and becomes vertical again beyond its vertex 94 It is characterized in that the gap Y2 between the two ends 91A and 91B is made smaller than the width Y4 of the trunk 97 so as to become closer to 93A.

In Figure 9 will be described the operation and problems of assembling the contact. The two ends 91A and 91B of the contact must be inserted into the fixed side hole 12 and the movable side hole 13 of the body 10, respectively, and the inner distances of the two ends of the contact as shown in detail. Since (Y1) is formed smaller than the width (G1) of the body particles, in order to insert the contact into the body, the distance (Y1) of the two ends of the contact to the width (G1) of the body particles (15) Insert it as far apart as it should be. Once the two ends of the contact are inserted, the insertion is continuously performed. As shown in the drawing, when the bent portion 95 of the contact reaches the widest peak 94, the contact of FIGS. Since the width Y3 of the widest point is formed to be larger than the distance of the outer width G1 of the contact insertion holes 12 and 13 formed at the bottom of the body, the vertex 94 of the bent portion of the contact is By passing through the guide hole 13 on the movable side, the two ends of the contact are almost in close contact with each other, and the two ends of the contact must be inserted into the other side with the slide particles 21 separately, and the two ends are on one side. A large amount of assembly failure will occur. The structure of the conventional socket makes contact assembly work difficult, generates a lot of insertion defects, and takes a lot of time, and in particular, when inserting a contact in an automatic machine, the structure of the automatic inserter becomes complicated, and a contact insertion error occurs. Is likely to occur frequently.

10 is a state in which the fixing plate 70 is assembled after the contact is inserted into the body, and the body of the contact 97 is fixed by the bottom surface 14 of the body particles and the fixing jaw 72 of the fixing plate. The contact pin 99 penetrates through the pin hole 73 formed in the fixing plate, and is configured to prevent the contact from shaking by the walls 74 and 75 formed around the accommodation hole 71. After the contact is assembled to the body, the inclined wall 17 on the movable side formed to increase the exit of the contact guide hole 11 configured in the body supports the outer surface of the contact bent portion 95 so that It is a conventional feature to be configured to gather the ends.

Therefore, in the above-described conventional socket structure, the inner side distance Y1 of the two ends of the contact is formed to be smaller than the width G1 of the body particles, so that the two ends 91A and 91B of the contact are formed of the body 10. It is difficult when inserting into the fixed side hole 12 and the movable side hole 13, and once the two ends of the contact are inserted into the body, the apex 94 of the bent part of the contact is the guide hole on the movable side of the body ( By passing through 13), the two ends of the contact are brought into close contact with each other, thereby improving the problem of the conventional socket, in which a large amount of assembly failure occurs in which the two ends of the contact are driven in one direction of the slide particles 21, thereby assembling. It improves the properties and further facilitates automatic assembly of contacts, simplifies the shape of parts to facilitate mold making, and improves the quality and assembly quality of parts to produce high quality sockets at a lower cost. It is an object of the subject innovation that.

1 shows a BGA type IC.

2 is a view showing the shape and configuration of the BGA socket.

3 illustrates components of a BGA socket.

4 is a view showing a PCB pattern mounted with a BGA socket.

5 illustrates the operation of a BGA socket.

6,7,8 illustrate the structure of components of a conventional BGA socket.

9 and 10 illustrate an assembly process of a conventional BGA socket.

11, 12, 13 is a view showing a part structure of the subject innovation BGA socket.

14 and 15 is a view showing the assembly process of the subject innovation BGA socket.

<Description of the symbols for the main parts of the drawings>

1: BGA IC (Ball Grid Array) 2: Solder Ball

10,110: body 20,120: slide

30, 100, 130: spring 40, 140: holder

50: IC adapter 60: Cover

70170: Fixing plate 80: Pin guide

90,190: Contact

When explaining the preferred structure of the BGA socket to be made in the present invention through FIGS. 11 to 13, first, Figure 11 is inserted into the contact (190) from the bottom up in the state in which the slide 120 is assembled to the body (110) The state to be shown is shown in partial section. Here, although not shown in the drawings, in order to assemble the slide in the body, a plurality of sliding protrusions 123 formed on the slide are in close contact with the sliding surface 119 of the body, so that there is no play in the vertical direction, the slide has a plurality of hooks. It is provided, the body accommodates the hook, but is configured to move as much as a small amount, that is, the slide movement amount horizontally. After inserting all of the contacts into the assembled body, the fixing plate 170 is assembled to fix the contacts, and then the remaining socket parts are assembled to complete the socket, which is similar to a conventional socket structure.

FIG. 12 illustrates in more detail how the shapes and shapes of the holes 111 to which the contacts are assembled in the slide-assembled body of FIG. 11 are configured. In the present invention, the body structure of the socket is formed as one hole 111 at the bottom of the body as shown in the front view of the guide hole for receiving the contact 190, the inlet is expanded in the shape of a trumpet A sphere 118 is formed, and the wall 116, 117 of the hole is formed almost vertically for a portion from the end of the inlet, and the inclined surface 116A of the fixed side from the height near the point where the particle 115 of the body starts. The width G11 at the outlet is constituted to be narrower than the width G22 of the two vertical walls 116 and 117. And the hole is divided into two proceeding to the upper sliding surface 119 of the body, two holes, that is, the fixed side hole 112 and the movable side hole 113 is formed between the particles 115 therebetween Formed. And as shown in the side view to form a step 114 on one wall of the contact guide hole 111 to serve as a stopper to complete the insertion of the upper end 196 of the contact body shown in Figure 13, another role As part of the body of the contact (197) is inserted into the guide hole 111 formed in the body also serves to make the stand immediately after the contact is inserted into the body. In the cross-sectional structure of the slide 120, similar to the conventional, the space 122 formed to receive the contact to avoid interference with the operation and the particle 121 to maintain the initial interval of the end of the contact and push the movable side to open Formed.

13 shows the structure of the contact 190 of the present invention, the contact pin 199 is formed long down and Hangul '?? The body 197, which is bent into a shape, and an upper end 196 and a lower end 198 are formed above and below, a fixed side 193A on the left side and a movable side 193B on the right side. On the upper side of the contact, a part having a thinner thickness is formed, and the inner side thereof is a part in contact with the particles 121 of the slide, and the fixed side contact portion 92A and the movable side contact portion 92B are formed, and the ends of the two contacts It is similar to the conventional structure that the fixed side tip 191A and the movable side tip 191B are precisely formed so as to be electrically contacted by biting the solder balls of the IC, similarly to the shape where the two canines are attached. However, the feature of the contact in the present invention is that the fixed side 193A and the movable side 193B stand vertically to be almost parallel as shown in the figure, there is no bending. Therefore, the distance (Y22) of the two ends (191A, 191B) of the contact is characterized in that it is formed the same or somewhat smaller than the width (Y44) of the body. This shape is simpler than the conventional one, so that mold processing is easy and the quality is stable.

In FIG. 14, an operation characteristic of the present invention, that is, an operation of assembling a contact and an advantage in comparison with a conventional socket will be described. In inserting the two ends 191A, 191B of the contact into the hole 111 of the body 110, the width G33 of the inlet 118 of the hole is formed larger than the interval Y22 of the end of the contact. Unlike this, it is easy to insert without changing the distance of contact end. In addition, in the state in which the spacing (Y22) of the end of the contact is slightly reduced, the insertion becomes easier. In this case, the insertion is better than the conventional one even if the inlet 118 is not formed. If the two ends of the contact continue to be inserted after the insertion is made, it passes through the substantially vertical two-sided walls 116 and 117 formed in the guide hole of the body, and near the height of the point where the particles 115 of the body start. The two ends of the contact are operated to be collected by the inclined surface 116A of the fixed side and the inclined surface 117A of the movable side, and the insertion of the two ends of the contact is performed when the end of the contact is inserted near the particle 121 of the slide. The gap is divided into both sides of the particle 121 is characterized by the width of the present design is configured to proceed to the insertion, the upper end of the body of the contact so that the insertion of the contact is completed through the particles of the slide in Figure 15 (196) When the contact is inserted up to the stair 114 formed in the hole 111 of the body, the two inner walls 192A and 192B at the ends of the contact may be applied to both sides of the slide particle 121 with an appropriate force. Configured to be in close contact is a feature of the present invention. And after the contact is inserted into the body to assemble the fixing plate 170, the body of the contact 197 is fixed to the contact by the stair 114 and the fixing jaw 172 of the fixing plate formed in the inner side of the body hole The contact pin 199 penetrates through the pin hole 173 formed in the fixing plate and is configured to prevent the contact from shaking by the walls 174 and 175 formed around the accommodation hole 171.

As described above, in the present invention, the ease of inserting a contact into the body, which is a problem in the conventional socket structure, and the ease and quality stability of allowing the end of the contact to be divided into both sides of the slide particle to proceed with insertion. In addition, it has a great effect in terms of ease of mold making and part processing due to the simple shape of the contact, and more importantly, the premise of the automatic insertion of the contact.

Claims (10)

A socket for testing a BGA type IC includes a body 10 and a slide 20 positioned thereon, two holders 40 on both sides of the slide, and a spring 30 below the holder. The upper side of the slide is an IC adapter 50 and the cover is located, the cover spring 100 for the operation of the cover is provided, the body is formed with a guide hole for receiving a plurality of contacts, below the contact In the structure of the socket is provided with a pin plate 80 for guiding the contact pin and the fixing plate 70 to fix the contact, the structure of the contact guide hole 111 formed in the body, the inlet is a trumpet-shaped inlet ( 118 is constructed, and during some sections following the inlet, both walls 116 and 117 of the hole are formed almost vertically and move with the inclined surface 116A of the fixed side from near the height of the point where the particles 115 of the body begin. Side mirror The surface 117A is configured such that the width G11 at the outlet is narrower than the width G22 of the two vertical walls 116 and 117, and the fixed side holes 112 and the inner side of the two inclined surfaces. The movable side hole 113 is formed, The particle | grains 115 were formed between them, It is characterized by the above-mentioned. The structure of claim 1, wherein the contact 190 has a fin 199. 'Shaped body (197) and the upper and lower ends 196 and the lower end (198) is formed above and below the body, and the fixed side (193A) on the left side and the movable side (193B) on the right side, The upper part is formed in a somewhat thinner thickness, and the ends of the two contacts are formed in the fixed side tip 191A and the movable side tip 191B, which are similar to the shape in which two canines are attached, and the fixed side 193A. And the movable side 193B are substantially parallel to each other and stand vertically, and the spacing Y22 between the two ends 191A and 191B of the contact is formed equal or somewhat smaller than the width Y44 of the trunk. . The structure of the contact guide hole (111) formed in the body of Claim 1 which does not comprise the trumpet-shaped inlet (118) in the inlet. According to claim 1, wherein the structure of the contact guide hole formed in the body of the fixed side is formed vertically without forming an inclined surface (116A). The operation characteristic of inserting a contact into the contact guide hole 111 formed in the main body of Claim 1 or 2 is that the inclined surface 116A of the fixed side formed in the body, and the inclined surface of the movable side as insertion progresses. Characterized by the fact that the two ends of the contact are collected by means of (117A). The operation characteristic of inserting a contact into the contact guide hole 111 formed in the body according to claim 1 or 2 or 4 is characterized in that the inclined surface 117A of the movable side formed in the body as the insertion proceeds. It is characterized in that the end 191B of the movable side of the contact is operated to be collected to the end (191A) of the fixed side. According to claim 1 or claim 2, by forming a step 114 in one inner wall of the contact guide hole 111 formed in the body, a part of the contact body 197 is accommodated into the guide hole, Contact The upper end 196 of the body is characterized in that configured to stop on the stairs. The contact guide hole of claim 1 or 2, wherein the upper end 196 of the contact body is not inserted into the inner side of the contact guide hole 111 of the body and stops on the bottom surface of the body. Characterized in that the staircase 114 is not formed on one inner wall of the (111). The inclined surface 116A on the fixed side and the inclined surface 117A on the movable side are formed inside the contact guide hole 111 formed in the body, and the particles 115 are formed on the inner sides of the two inclined surfaces. Did not. The method according to claim 1 or 9, wherein the inclined surface 116A of the fixed side is vertically extended without forming the inside of the contact guide hole 111 formed in the body, and constitutes only the inclined surface 117A of the movable side, Particles 115 are not formed on the inner side of the two inclined surfaces. Reference Patent 1.Socket device, application number: JP 1997-066244, publication number: JP 1998-063835