Tool clamp for full-automatic lead bonding of substrates with different boundary dimensions

Abstract

The utility model discloses a tool clamp for full-automatic lead bonding of substrates with different boundary dimensions. The tool clamp comprises a base, a sliding block, a baffle plate, a limiting plate, a positioning block, a mounting plate and a screw rod, an L-shaped groove is formed in the upper edge of the base, rectangular grooves are formed in the left edge and the right edge respectively, and a T-shaped groove is formed in the base; the baffle is mounted in the L-shaped groove; the left rectangular groove and the right rectangular groove are each internally provided with a limiting plate. The positioning block is mounted in the L-shaped groove; the sliding block penetrates into a notch formed by the left limiting plate, the right limiting plate and the upper surface of the base. The mounting plate is mounted in the rectangular groove in the outer side of the T-shaped groove and connected with the base through a screw, a screw hole is formed in the mounting plate, and a screw rod penetrates through the screw hole and enters the guide groove. The wire bonding clamp is simple in structure, can be suitable for clamping substrates with different boundary dimensions, has high universality and flexibility, and can effectively solve the problems that in the production and scientific research process, a wire bonding clamp is frequently replaced, the machining cost of the clamp is high, and the machining period is long.

Description

Technical Field

[0001] The utility model belongs to the technical field of semiconductor device packaging, and relates to a tooling fixture used for full-automatic wire bonding of substrates with different outer dimensions. Background Art

[0002] Wire bonding is a key process in the semiconductor packaging manufacturing process. The quality of bonding is directly related to the performance and reliability of the entire packaged device. Compared with the traditional manual wire bonding process, the fully automatic wire bonding process is characterized by high efficiency and good consistency, and is more suitable for mass production. With the continuous development of semiconductor packaging technology, the fully automatic wire bonding process has become more mature and has been used by more and more semiconductor manufacturers. At present, there are many types of circuit substrates used in production and scientific research. For the fully automatic wire bonding of different substrates, due to the difference in external dimensions, the tooling fixtures are one-to-one corresponding to each other. One set of fixtures corresponds to one product, and the versatility is not strong. For new production or scientific research projects with more urgent needs, the cycle of redesigning and processing fixtures is long, which may cause delays in project progress and cause unnecessary economic losses. In addition, the cost of frequent fixture replacement is also relatively high. Therefore, it is necessary to design a tooling fixture for fully automatic wire bonding of substrates with different external dimensions. Utility Model Content

[0003] (I) Purpose of the utility model

[0004] The purpose of the utility model is to propose a tooling fixture for fully automatic wire bonding of substrates with different dimensions in view of the defects of the fully automatic wire bonding fixture in the prior art and in combination with the actual needs of production and scientific research projects.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the utility model provides a fixture for fully automatic wire bonding of substrates of different outer sizes, including a base 1, a slider 2, a baffle 3, a limit plate 4, a positioning block 5, a mounting plate 6 and a screw 7.

[0007] The base 1 has an L-shaped groove 8 on the upper edge, a first rectangular groove 9 on the left and right edges, and a T-shaped groove inside, which is composed of a guide groove 10 and a second rectangular groove 11. The baffle 3 is installed in the rectangular groove outside the L-shaped groove 8, and the two are connected by screws; a limit plate 4 is installed in each of the left and right first rectangular grooves 9, and the limit plate 4 is connected to the base 1 by screws; the positioning block 5 is installed in the small notch inside the L-shaped groove 8, and is connected to the base 1 by screws; the slider 2 is composed of a boss 12 and a flat plate 13, and the flat plate 13 penetrates into the notch formed by the left and right limit plates 4 and the upper surface 14 of the base, and the boss 12 is embedded in the guide groove 10, and the slider 2 can slide freely in the guide groove 10; the mounting plate 6 is installed in the second rectangular groove 11 outside the T-shaped groove, and is connected to the base 1 by screws, and there are screw holes on the mounting plate 6, and the screw 7 passes through the screw holes and enters the guide groove 10.

[0008] Among them, a notch 15 is opened on the base 1 to facilitate the operation of the screw 7. The bottom of the base has a waist-shaped groove 16 and a round hole 17 for positioning the fixture. There are four first countersunk holes 18 on the four corners of the base 1 for screw connection between the fixture and the bonding machine workbench.

[0009] Among them, one side of the baffle 3 is composed of two mutually parallel planes and a first inclined surface 19, the first inclined surface 19 is about 18 degrees to the vertical direction, the height of the first inclined surface 19 is about 1.5mm, and its main function is to limit the warping of the clamped substrate. The height of the plane 20 is slightly greater than the depth of the L-shaped groove 8 to ensure that the first inclined surface 19 is higher than the upper surface of the base 1 as a whole after installation. When the baffle 3 is installed, the plane 20 should be in close contact with the inner wall of the L-shaped groove 8. The length of the baffle 3 is slightly less than the length of the L-shaped groove 8. There are two first conical countersunk holes 21 on the baffle 3 for screw installation.

[0010] The cross section of the limit plate 4 is an L-shaped structure, which is mainly used for limiting the vertical direction of the slider 2 and plays a role in assisting the slider 2 in guiding. The length of the limit plate 4 is slightly smaller than the length of the first rectangular grooves 9 on both sides. When the limit plate 4 is installed, its side wall 22 should be in close contact with the inner wall 23 of the first rectangular groove 9. The distance between the inner walls 23 of the two first rectangular grooves 9 is slightly larger than the length of the slider 2. After the limit plate 4 is installed, the distance between the bottom surface 24 of the boss and the upper surface 14 of the base 1 is slightly larger than the thickness of the flat plate 13 of the slider. Two second conical countersunk holes 25 are provided on the limit plate 4 for screw installation.

[0011] Among them, the positioning block 5 is used for accurate positioning of the substrate. The length of the positioning block 5 is slightly smaller than the length of the small notch inside the L-shaped groove 8. After the positioning block 5 is installed, its upper surface is about 141mm higher than the upper surface of the base 1. Two second countersunk holes 26 are opened on the positioning block 5 for screw installation.

[0012] Among them, the slider 2 plays the role of pushing and clamping the substrate, and its boss 12 is embedded in the guide groove 10, mainly playing a guiding role. The distance between the left and right sides of the boss 12 is slightly smaller than the width of the guide groove 10, and the distance between the bottom surface of the boss 12 and the bottom surface of the flat plate 13 is slightly smaller than the depth of the guide groove 10, so as to ensure that the bottom surface of the flat plate of the slider 2 is in perfect contact with the upper surface of the base 1, and at the same time, there is a certain gap between the bottom surface of the boss 12 and the bottom of the guide groove 10. There is a second inclined surface 27 on one side of the flat plate part of the slider, which is about 18° with the vertical direction and has a height of about 1.5mm. The main function is to limit the tilting of the clamped substrate. The vertical edges of the slider 2 and the upper edges of the guide groove are rounded to reduce the resistance of the slider 2 during sliding.

[0013] Among them, a screw hole 28 is opened on the side of the mounting plate 6 for installing the screw 7. The length of the mounting plate 6 is slightly smaller than the length of the second rectangular groove 11 at the corresponding position. After the mounting plate 6 is installed on the base 1, its top is about 2 mm higher than the upper surface 14 of the base 1 to limit the slider 2 from sliding away from the guide groove 10; two third conical countersunk holes 29 are opened on the mounting plate 6 for screw installation.

[0014] The screw rod 7 plays the role of pushing the slider 2, and the handle portion at its end adopts a knurling design for easy operation.

[0015] Among them, all parts are made of stainless steel to reduce wear during the use of the clamp and extend the service life of the clamp.

[0016] The fixture of the utility model is used in conjunction with a fully automatic wire bonding machine. The slider 2 can be pushed along the guide groove 10 by screwing the screw 7 to tighten the substrate, and the positioning block 5 can be used to accurately position the substrate to achieve substrate clamping.

[0017] (III) Beneficial effects

[0018] The tooling fixture for fully automatic wire bonding of substrates of different outer sizes provided by the above technical solution has a simple structure compared with traditional wire bonding fixtures, and can be used for clamping substrates of various outer sizes such as rectangular, trapezoidal, waist-shaped, and flat quadrilaterals. It has strong versatility and flexibility, and can effectively solve the problems of frequent replacement of wire bonding fixtures, high fixture processing costs, and long processing cycles during production and scientific research. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional model of the utility model;

[0020] Figure 2 It is a three-dimensional model of the base of the utility model; Figure A and Figure B are two different orientations;

[0021] Figure 3It is a three-dimensional model of the slider of the utility model;

[0022] Figure 4 It is the three-dimensional model of the baffle of the utility model;

[0023] Figure 5 It is a three-dimensional model of the limit plate of the utility model;

[0024] Figure 6 It is a three-dimensional model of the installation plate of the utility model;

[0025] Figure 7 This is a three-dimensional model of the positioning block of the utility model. DETAILED DESCRIPTION

[0026] In order to make the purpose, content and advantages of the utility model clearer, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments.

[0027] Reference Figures 1 to 7 As shown, the fixture for fully automatic wire bonding of substrates of different outer sizes of the present invention comprises a base 1, a slider 2, a baffle 3, a limit plate 4, a positioning block 5, a mounting plate 6 and a screw 7.

[0028] See also Figure 1 , Figure 2 , Figure 3 The base 1 has an L-shaped groove 8 on the upper edge, a first rectangular groove 9 on the left and right edges, and a T-shaped groove inside. The T-shaped groove is composed of a guide groove 10 and a second rectangular groove 11. The baffle 3 is installed in the rectangular groove outside the L-shaped groove 8, and the two are connected by screws; a limit plate 4 is installed in each of the left and right first rectangular grooves 9, and the limit plate 4 is connected to the base 1 by screws; the positioning block 5 is installed in the small notch inside the L-shaped groove 8 and is connected to the base 1 by screws; the slider 2 is composed of a boss 12 and a flat plate 13. The flat plate 13 penetrates into the notch formed by the left and right limit plates 4 and the upper surface 14 of the base, and the boss 12 is embedded in the guide groove 10. The slider 2 can slide freely in the guide groove 10; the mounting plate 6 is installed in the second rectangular groove 11 outside the T-shaped groove, and is connected to the base 1 by screws. There are screw holes on the mounting plate 6, and the screw 7 passes through the screw holes and enters the guide groove 10.

[0029] See also Figure 1 , Figure 2 , Figure 4One side of the baffle 3 is composed of two parallel planes and a first inclined plane 19. The first inclined plane 19 is about 18 degrees to the vertical direction. The height of the first inclined plane 19 is about 1.5mm. The main function is to limit the warping of the clamped substrate. The height of the plane 20 is slightly greater than the depth of the L-shaped groove 8 to ensure that the first inclined plane 19 is higher than the upper surface of the base 1 after installation. When the baffle 3 is installed, the plane 20 should be in close contact with the inner wall of the L-shaped groove 8. The length of the baffle 3 is slightly less than the length of the L-shaped groove 8. There are two first conical countersunk holes 21 on the baffle 3 for screw installation.

[0030] See also Figure 1 , Figure 2 , Figure 3 , Figure 5 The cross section of the limit plate 4 is an L-shaped structure, which is mainly used to limit the vertical direction of the slider 2 and also plays a role in assisting the slider 2 in guiding. The length of the limit plate 4 is slightly smaller than the length of the first rectangular grooves 9 on both sides. When the limit plate 4 is installed, its side wall 22 should be in close contact with the inner wall 23 of the first rectangular groove 9. The distance between the inner walls 23 of the two first rectangular grooves 9 is slightly larger than the length of the slider 2. After the limit plate 4 is installed, the distance between the bottom surface 24 of the boss and the upper surface 14 of the base 1 is slightly larger than the thickness of the flat plate 13 of the slider. Two second conical countersunk holes 25 are provided on the limit plate 4 for screw installation.

[0031] See also Figure 1 , Figure 2 , Figure 7 The positioning block 5 is used for accurate positioning of the substrate. The length of the positioning block 5 is slightly smaller than the length of the small notch inside the L-shaped groove 8. After the positioning block 5 is installed, its upper surface is about 141 mm higher than the upper surface of the base 1. Two second countersunk holes 26 are opened on the positioning block 5 for screw installation.

[0032] See also Figure 1 , Figure 2 , Figure 3 The slider 2 plays the role of pushing and clamping the substrate. Its boss 12 is embedded in the guide groove 10 and mainly plays a guiding role. The distance between the left and right sides of the boss 12 is slightly smaller than the width of the guide groove 10, and the distance between the bottom surface of the boss 12 and the bottom surface of the flat plate 13 is slightly smaller than the depth of the guide groove 10, so as to ensure that the bottom surface of the flat plate of the slider 2 is in perfect contact with the upper surface of the base 1. At the same time, there is a certain gap between the bottom surface of the boss 12 and the bottom of the guide groove 10. There is a second inclined surface 27 on one side of the flat plate part of the slider. The second inclined surface 27 is about 18° with the vertical direction. The height of the second inclined surface 27 is about 1.5mm. The main function is to limit the tilting of the clamped substrate. The vertical edges of the slider 2 and the upper edges of the guide groove are rounded to reduce the resistance of the slider 2 during sliding.

[0033] See also Figure 1 , Figure 2 , Figure 6A screw hole 28 is provided on the side of the mounting plate 6 for installing the screw rod 7. The length of the mounting plate 6 is slightly smaller than the length of the second rectangular groove 11 at the corresponding position. After the mounting plate 6 is installed on the base 1, its top is about 2 mm higher than the upper surface 14 of the base 1 to limit the slider 2 from sliding off the guide groove 10. Two third conical countersunk holes 29 are provided on the mounting plate 6 for screw installation.

[0034] See also Figure 1 The screw rod 7 plays the role of pushing the slider 2, and the handle portion at its end adopts a knurling design for easy operation.

[0035] The present embodiment is a fixture for fully automatic wire bonding of substrates of different dimensions, and all components thereof are made of stainless steel to reduce wear during use of the fixture and extend the service life of the fixture.

[0036] Taking the rectangular substrate clamping as an example, the specific use of the utility model is described as follows:

[0037] First, place the substrate on the surface of the base 1 so that its two adjacent sides are respectively in close contact with the first inclined surface 19 of the baffle 3 and the right side of the positioning block 5, and screw the screw 7 clockwise to push the slider 2 to move along the guide groove 10 until the first inclined surface 19 of the slider 2 contacts and tightens with the edge of the substrate, thus completing the clamping and positioning of the substrate. Screw the screw 7 counterclockwise to disengage the slider 2 and move it backward a certain distance, and move the slider 2 backward away from the substrate to remove the substrate. The main function of the positioning block 5 is to accurately position the substrate so that the visual system of the automatic bonding machine can accurately search and identify the substrate pattern, thereby completing the wire bonding. The utility model is suitable for substrates of various external structures. As long as the size of the substrate is within the limit clamping range of the fixture, the utility model can be used to clamp and position the substrate.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A fixture for fully automatic wire bonding of substrates of different dimensions, characterized in that: include: A base (1), a slider (2), a baffle (3), a limit plate (4), a positioning block (5), a mounting plate (6) and a screw (7); the base (1) has an L-shaped groove (8) on its upper edge, a first rectangular groove (9) on its left and right edges, and a T-shaped groove inside, wherein the T-shaped groove includes a guide groove (10) and a second rectangular groove (11); the baffle (3) is installed in a rectangular groove outside the L-shaped groove (8), and the two are connected by screws; a limit plate (4) is installed in each of the left and right first rectangular grooves (9), and the limit plate (4) is connected to the base (1) by screws; the positioning block (5) is installed The slider (2) is connected to the base (1) by screws in the small notch inside the L-shaped groove (8); the slider (2) includes a boss (12) and a plate (13); the plate (13) is inserted into the notch formed by the left and right limit plates (4) and the upper surface (14) of the base, and the boss (12) is embedded in the guide groove (10); the slider (2) slides freely in the guide groove (10); the mounting plate (6) is installed in the second rectangular groove (11) outside the T-shaped groove, and is connected to the base (1) by screws; the mounting plate (6) has screw holes, and the screw rod (7) passes through the screw holes and enters the guide groove (10).

2. The fixture for fully automatic wire bonding of substrates of different dimensions as claimed in claim 1, characterized in that: The base (1) has a notch (15) to make room for the screw (7). The bottom of the base (1) has a waist-shaped groove (16) and a round hole (17) for positioning the fixture. The four corners of the base (1) have four first countersunk holes (18) for screw connection between the fixture and the bonding machine workbench.

3. The fixture for fully automatic wire bonding of substrates of different dimensions as claimed in claim 2, characterized in that: One side of the baffle (3) is composed of two mutually parallel planes (20) and a first inclined surface (19), the first inclined surface (19) is 18 degrees to the vertical direction, and the height of the first inclined surface (19) is 1.5 mm; the height of the plane (20) is greater than the depth of the L-shaped groove (8), the plane (20) is in close contact with the inner wall of the L-shaped groove (8), and the length of the baffle (3) is less than the length of the L-shaped groove (8).

4. The fixture for fully automatic wire bonding of substrates with different dimensions as claimed in claim 3, characterized in that: The baffle (3) is provided with two first conical countersunk holes (21) for screw installation.

5. The fixture for fully automatic wire bonding of substrates with different dimensions as claimed in claim 3, characterized in that: The cross section of the limiting plate (4) is an L-shaped structure and is used for limiting the vertical direction of the slider (2). The length of the limiting plate (4) is less than the length of the first rectangular grooves (9) on both sides. When the limiting plate (4) is installed, its side wall (22) is tightly attached to the inner wall (23) of the first rectangular groove (9). The distance between the inner walls (23) of the two first rectangular grooves (9) is greater than the length of the slider (2). After the limiting plate (4) is installed, the distance between the bottom surface (24) of its boss and the upper surface (14) of the base (1) is greater than the thickness of the flat plate (13) of the slider (2).

6. The fixture for fully automatic wire bonding of substrates with different dimensions as claimed in claim 5, characterized in that: The limiting plate (4) is provided with two second conical countersunk holes (25) for screw installation.

7. The fixture for fully automatic wire bonding of substrates with different dimensions as claimed in claim 5, characterized in that: The length of the positioning block (5) is less than the length of the small notch inside the L-shaped groove (8). After the positioning block (5) is installed, its upper surface is 1 mm higher than the upper surface (14) of the base (1). The positioning block (5) is provided with two second countersunk holes (26) for screw installation.

8. The fixture for fully automatic wire bonding of substrates with different dimensions as claimed in claim 7, characterized in that: The boss (12) of the slider (2) is embedded in the guide groove (10), the distance between the left and right sides of the boss (12) is smaller than the width of the guide groove (10), the distance between the bottom surface of the boss (12) and the bottom surface of the plate (13) is smaller than the depth of the guide groove (10), and there is a gap between the bottom surface of the boss (12) and the bottom of the guide groove (10); a second inclined surface (27) is provided on one side of the flat plate portion of the slider, the second inclined surface (27) is 18 degrees with respect to the vertical direction, and the height of the second inclined surface (27) is 1.5 mm; the vertical edges of the slider (2) and the upper edges of the guide groove are rounded.

9. The fixture for fully automatic wire bonding of substrates with different dimensions as claimed in claim 8, characterized in that: The side of the mounting plate (6) is provided with a screw hole (28) for installing the screw rod (7); the length of the mounting plate (6) is less than the length of the second rectangular groove (11) at the corresponding position; after the mounting plate (6) is installed on the base (1), its top is 2 mm higher than the upper surface (14) of the base (1); and the mounting plate (6) is provided with two third conical countersunk holes (29) for screw installation.

10. The fixture for fully automatic wire bonding of substrates with different dimensions as claimed in claim 9, characterized in that: Each component of the fixture is made of stainless steel.

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