A pin shaping jig

Abstract

A pin shaping jig, including positioning mechanism, the front end of positioning mechanism is equipped with constraint piece, the front end of positioning mechanism is equipped with shaping mechanism still.The utility model discloses through rectangular groove to the plastic package of semiconductor is limited constraint, and when plastic package is placed in rectangular groove, and through concave piece to the upper side of plastic package is limited, and when plastic package is constrained, the elastic force of second spring due to deformation, when pin shaping is completed, can the plastic package from rectangular groove and eject.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor processing technology, and in particular to a pin shaping fixture. Background Technology

[0002] like Figure 6 This is a three-dimensional structural diagram of a semiconductor device, consisting of a molding compound and three leads mounted on the molding compound. The semiconductor device is manufactured through steps such as lead frame fabrication, chip mounting, and molding. After fabrication, the leads need to be detached from the lead frame using a cutting device. During the cutting process, some leads inevitably bend upwards or downwards at the cut ends. This deformation affects the semiconductor soldering, and such defective products occasionally occur. To avoid wasting production resources, these defective products are subsequently picked out using a sorting system, and the leads are then manually shaped. The shaping process involves pressing down on the leads. This shaping method has the problem of springback after deformation, and when pressing down on leads with significant bends, it can directly cause the leads to fold in half. Utility Model Content

[0003] This utility model provides a pin shaping fixture to overcome the shortcomings of the prior art and solve the problems existing in the pin shaping of semiconductor devices, and has strong practicality.

[0004] In order to achieve the purpose of this utility model, the following technology is proposed to be adopted: A pin shaping fixture includes a positioning mechanism, a constraint member at the front end of the positioning mechanism, and a shaping mechanism at the front end of the positioning mechanism.

[0005] Furthermore, the positioning mechanism includes a rectangular block with a rectangular groove formed on the upper wall of the block, grooves on both sides of the block, a movable block movably disposed in the groove, and a concave part welded to the outside of the movable block.

[0006] Furthermore, the constraint component includes a pair of vertically arranged front plates, with a constraint plate machined on the upper end of the front plates. Multiple constraint grooves are formed in the lower wall of the constraint plate. A protrusion is formed on the front end of the block, and the front plates are located on both sides of the protrusion. Two pairs of guide rods are threadedly connected to the front end of the block, and the guide rods pass through the front plates.

[0007] Furthermore, a pair of side guide rods are fixed to the front sides of the block by screws. The outer end of the side guide rod has an outer end cap. An inner pressure plate is fitted on each pair of side guide rods. An L-shaped limiting member is formed on the front side of the inner pressure plate. A first spring is fitted on the outer end of the side guide rod. The outer end of the first spring abuts against the outer end cap. The inner end of the first spring abuts against the outer wall of the inner pressure plate. A limiting groove is opened on the front side of the front plate. The front end of the limiting member is locked in the limiting groove.

[0008] Furthermore, multiple vertical rods are inserted through the bottom of the rectangular groove. The lower end of each vertical rod has a cap, and an upper top plate is fixed to the upper end of the vertical rod. The upper top plate is located inside the rectangular groove. A second spring is sleeved on the vertical rod. The lower end of the second spring abuts against the bottom of the rectangular groove, and the upper end of the second spring abuts against the lower wall of the upper top plate.

[0009] Furthermore, the shaping mechanism includes multiple pads formed on the front end of the protrusion. A concave sleeve is fitted on the pad. A pair of waist-shaped holes are opened on the vertical section of the concave sleeve. A pressure rod is movably installed in the waist-shaped holes. The lower end of the concave sleeve is welded to a lower plate. A screw abuts on the lower wall of the lower plate. A rotating cap is provided at the lower end of the screw. A concave pull member is connected to the screw by threads. The two ends of the pressure rod are rotatably located at the upper end of the vertical section of the concave pull member.

[0010] The advantages of the above technical solution are: This invention uses a rectangular groove to limit and constrain the semiconductor encapsulation. When the encapsulation is placed in the rectangular groove, the upper side of the encapsulation is limited by a concave part. After the encapsulation is constrained, the elastic force generated by the deformation of the second spring can push the encapsulation out of the rectangular groove after the pin is shaped.

[0011] This invention also uses a constraint plate and its constraint groove to limit the root of the pin, so as to prevent the root of the pin from being bent or affecting the connection between the pin and the molding compound during the shaping process.

[0012] In this invention, during the shaping process, the pressure rod is moved so that it acts on the pin, thereby cooperating with the pad to complete the shaping operation of the pin. Attached Figure Description

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will provide a further detailed description of this utility model in conjunction with the accompanying drawings.

[0014] Figure 1 A three-dimensional structure of one embodiment is shown. Figure 1 .

[0015] Figure 2 A three-dimensional structural diagram of the positioning mechanism is shown.

[0016] Figure 3 A three-dimensional structural diagram of the top plate is shown.

[0017] Figure 4 A three-dimensional structural diagram of the constraint plate is shown.

[0018] Figure 5 A three-dimensional structure of one embodiment is shown. Figure 2 .

[0019] Figure 6 A three-dimensional structural diagram of a semiconductor device is shown. Detailed Implementation

[0020] like Figures 1-6 As shown, a pin shaping fixture includes a positioning mechanism 1, a constraint member 2 at the front end of the positioning mechanism 1, and a shaping mechanism 3 at the front end of the positioning mechanism 1.

[0021] The positioning mechanism 1 includes a rectangular block 10. A rectangular groove 100 is formed on the upper wall of the block 10. Grooves 101 are respectively formed on both sides of the block 10. A movable block is movably disposed in the groove 101. A concave part 105 is welded to the outside of the movable block. Multiple vertical rods 103 are inserted through the bottom of the rectangular groove 100. The lower end of the vertical rod 103 has a lower end cap. An upper top plate 102 is fixed to the upper end of the vertical rod 103. The upper top plate 102 is located in the rectangular groove 100. A second spring 104 is sleeved on the vertical rod 103. The lower end of the second spring 104 abuts against the bottom of the rectangular groove 100, and the upper end of the second spring 104 abuts against the lower wall of the upper top plate 102.

[0022] The constraint member 2 includes a pair of vertically arranged front plates 21. The upper end of the front plate 21 is machined with a constraint plate 20. The lower wall of the constraint plate 20 is formed with a plurality of constraint grooves 23. The front end of the block 10 is formed with a protrusion 12. The front plate 21 is located on both sides of the protrusion 12. The front end of the block 10 is connected to two pairs of guide rods 18 by threads. The guide rods 18 pass through the front plate 21. A pair of side guide rods 14 are fixed to the front sides of the block 10 by screws. The outer end of the side guide rod 14 has an outer end cap. An inner pressure plate 16 is fitted on each pair of side guide rods 14. An L-shaped limiting member 17 is formed on the front side of the inner pressure plate 16. A first spring 15 is fitted on the outer end of the side guide rod 14. The outer end of the first spring 15 abuts against the outer end cap. The inner end of the first spring 15 abuts against the outer wall of the inner pressure plate 16. A limiting groove 22 is opened on the front side of the front plate 21. The front end of the limiting member 17 is locked in the limiting groove 22.

[0023] The shaping mechanism 3 includes multiple pads 13 formed at the front end of the protrusion 12. A concave sleeve 39 is fitted on the pad 13. A pair of waist-shaped holes 31 are opened on the vertical section of the concave sleeve 39. A pressure rod 32 is movably installed in the waist-shaped holes 31. The lower end of the concave sleeve 39 is welded to a lower plate 33. A screw 35 abuts against the lower wall of the lower plate 33. A rotating cap 36 is provided at the lower end of the screw 35. A concave pull member 34 is connected to the screw 35 by thread. The two ends of the pressure rod 32 are rotatably located at the upper end of the vertical section of the concave pull member 34.

[0024] In this embodiment, when shaping the pin, the operator places the molding compound in the rectangular groove 100 and presses it down. When pressing down, the second spring 104 is compressed, causing the lower side of the pin to abut against the upper wall of the block 10.

[0025] Then move the concave part 105 so that it is located at the upper end of the molding compound, and then constrain and limit the upper side of the horizontal section of the concave part 105.

[0026] Next, the operator puts the front plate 21 onto the guide rod 18. During the putting on, the limiting member 17 needs to be moved outward. After the putting on, the limiting member 17 will move inward under the action of the first spring 15. At this time, the limiting member 17 will be stuck in the limiting groove 22, and the root of the pin is located in the constraint groove 23.

[0027] The operator then places the concave sleeve 39 onto the pad 13 and then tightens the screw 35 so that the pressure rod 32 acts on the upper wall of the pin. The pressure rod 32 is then moved, and during the movement, the pressure rod 32 flattens the pin. This flattening method provides space and time for the pin to deform compared to flattening the whole, thus avoiding the problem of springback after shaping.

[0028] After the shaping is completed, the operator removes the concave sleeve 39 and opens the limiting piece 17, then removes the constraint plate 20 and moves the concave piece 105 outward. After that, the plastic seal will be lifted up by the elastic force of the second spring 104.

[0029] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A pin shaping fixture, characterized in that, It includes a positioning mechanism (1), a constraint member (2) at the front end of the positioning mechanism (1), and a shaping mechanism (3) at the front end of the positioning mechanism (1).

2. The pin shaping fixture according to claim 1, characterized in that, The positioning mechanism (1) includes a rectangular block (10), the upper wall of the block (10) is formed with a rectangular groove (100), and grooves (101) are respectively opened on both sides of the block (10). A movable block is movably arranged in the groove (101), and a concave part (105) is welded to the outside of the movable block.

3. The pin shaping fixture according to claim 2, characterized in that, The constraint member (2) includes a pair of vertically arranged front plates (21). The upper end of the front plate (21) is machined with a constraint plate (20). The lower wall of the constraint plate (20) is formed with multiple constraint grooves (23). The front end of the block (10) is formed with a protrusion (12). The front plate (21) is located on both sides of the protrusion (12). The front end of the block (10) is connected to two pairs of guide rods (18) by threads. The guide rods (18) pass through the front plate (21).

4. The pin shaping fixture according to claim 3, characterized in that, A pair of side guide rods (14) are fixed to the front sides of the block (10) by screws. The outer end of the side guide rod (14) has an outer end cap. An inner pressure plate (16) is fitted on each pair of side guide rods (14). A limiting member (17) with an L-shaped structure is formed on the front side of the inner pressure plate (16). A first spring (15) is fitted on the outer end of the side guide rod (14). The outer end of the first spring (15) abuts against the outer end cap. The inner end of the first spring (15) abuts against the outer wall of the inner pressure plate (16). A limiting groove (22) is opened on the front side of the front plate (21). The front end of the limiting member (17) is locked in the limiting groove (22).

5. The pin shaping fixture according to claim 2, characterized in that, Multiple vertical rods (103) are inserted through the bottom of the rectangular groove (100). The lower end of each vertical rod (103) has a cap. An upper plate (102) is fixed to the upper end of each vertical rod (103). The upper plate (102) is located inside the rectangular groove (100). A second spring (104) is sleeved on the vertical rod (103). The lower end of the second spring (104) abuts against the bottom of the rectangular groove (100), and the upper end of the second spring (104) abuts against the lower wall of the upper plate (102).

6. The pin shaping fixture according to claim 3, characterized in that, The shaping mechanism (3) includes multiple pads (13) formed on the front end of the protrusion (12). A concave sleeve (39) is fitted on the pad (13). A pair of waist-shaped holes (31) are opened on the vertical section of the concave sleeve (39). A pressure rod (32) is movably installed in the waist-shaped hole (31). The lower end of the concave sleeve (39) is welded to a lower plate (33). A screw (35) abuts against the lower wall of the lower plate (33). A rotating cap (36) is provided at the lower end of the screw (35). A concave pull member (34) is connected to the screw (35) by a thread. The two ends of the pressure rod (32) are rotatably located at the upper end of the vertical section of the concave pull member (34).

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