Aging clamp for semi-bare packaging product

Abstract

The utility model discloses a half-bare packaging product aging clamp comprising a main clamp, the main clamp comprises an upper clamping piece, a lower clamping piece, a threaded rod and two connecting rods, and two ends of the two connecting rods are respectively connected to the upper clamping piece and the lower clamping piece; an auxiliary clamp is arranged on the lower clamping piece, a containing groove used for containing a product is formed in the side, close to the upper clamping piece, of the auxiliary clamp, the area of the bottom wall of the containing groove is larger than that of the end face of the product, the containing groove is in clearance fit with the product, and a protection piece used for preventing the end face of the product from being damaged is arranged on the auxiliary clamp. The edge of the product is prevented from being abraded as much as possible, meanwhile, the end face of the product is protected through the protection piece, so that the surface of the product cannot be extruded when the upper clamping piece abuts against the product in the aging and heat dissipation process of the product through the main clamp, and the product is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor structures, in particular to an aging fixture for semi-naked packaged products. Background Art

[0002] As semiconductor products and structures become more and more integrated and the product structures are more delicate, the product is a diode integrated chip, and some products begin to adopt semi-naked packaging, with the front side (chip side) of the product exposed outside; since such chips basically belong to high-voltage, high-current, and high-power devices, when aging, due to the high voltage and current applied (forward current exceeding 5A and reverse voltage exceeding 100V), a large amount of heat is generated, so the product itself does not have strong heat dissipation ability. When aging, a large radiator fixture is required, and the radiator also serves as an electrode and needs to be in close contact with the chip surface to ensure good electrical contact and heat dissipation ability.

[0003] The commonly used radiator fixture mainly includes a main fixture. The main fixture includes an upper clamping member and a lower clamping member. The upper clamping member and the lower clamping member are two radiators respectively. Two connecting rods are slidably sleeved on the upper clamping member together. The two connecting rods are made of metal rods; the two connecting rods are fixedly connected to the lower clamping member, and the ends of the two connecting rods away from the lower clamping member are fixedly connected to a connecting plate together. A threaded rod is threaded through the connecting plate and one end of the threaded rod is rotatably connected to the upper clamping member; two springs are connected between the upper clamping member and the lower clamping member, and the two springs are respectively sleeved on the two connecting rods. When the upper clamping member moves upward, it has a pushing effect, and when the upper clamping member moves downward, it prevents the upper clamping member from directly pressing on the chip. Insulation treatment is done at the connection. By rotating the threaded rod, the upper clamping member slides up and down on the two connecting rods. When aging, the upper clamping member is pressed down to be in close contact with the product area; the product is placed in the center of the radiator fixture by tweezers, and the product is clamped and cooled by the aging fixture.

[0004] When the fixture ages and dissipates heat from the product, due to the relatively rough surface of the fixture and the end face on one side of the fixture electrode not being completely parallel to the end face of the product, when the end face of the fixture contacts the end face of the product, it is easy to cause indentations on the product surface and the product to be damaged to a certain extent, seriously affecting the qualification rate of the product finished products and thus affecting the product supply schedule. Summary of the Utility Model

[0005] To solve the above technical problems, the utility model provides an aging fixture for semi-naked packaged products.

[0006] The utility model is achieved through the following technical solutions.

[0007] A kind of aging fixture for semi-naked packaging products provided by the utility model comprises a main fixture, and the main fixture includes an upper clamping part, a lower clamping part, a threaded rod and two connecting rods. The two ends of the two connecting rods are respectively connected to the upper clamping part and the lower clamping part; A sub-fixture is arranged on the lower clamping part. A placing groove for placing the product is opened on one side of the sub-fixture close to the upper clamping part. The area of the bottom wall of the placing groove is larger than the area of the end face of the product. The placing groove and the product are in clearance fit. A protective part for preventing the end face of the product from being damaged is arranged on the sub-fixture.

[0008] Preferably, the protective part is arranged as a protective gasket. When the product is placed in the placing groove, the protective gasket is laid on the side of the product away from the bottom wall of the placing groove.

[0009] Preferably, the protective gasket is a silver-copper sheet.

[0010] Preferably, a gold layer is plated on the surface of the protective gasket.

[0011] Preferably, the area of the side of the protective gasket close to the upper clamping part is larger than the area of the end face of the upper clamping part in contact with the protective gasket.

[0012] Preferably, a positioning part for preventing the protective gasket from contacting the passivation layer of the product is arranged on the sub-fixture.

[0013] Preferably, the positioning part is arranged as a positioning frame and the positioning frame is placed on the side of the product away from the placing groove. The positioning frame is arranged in a circular ring shape and the ring width of the positioning frame is larger than the width of the passivation layer of the product. The outer ring of the positioning frame is in clearance fit with the inner wall of the placing groove, and the inner ring of the positioning frame is in clearance fit with the protective gasket.

[0014] Preferably, the positioning frame is made of polytetrafluoroethylene.

[0015] Preferably, a communication groove is opened on the sub-fixture. The opposite side walls of the communication groove are respectively in communication with the outer side wall of the sub-fixture and the inner side wall of the placing groove.

[0016] Preferably, a groove is opened on the side of the lower clamping part close to the upper clamping part. A convex block is connected to the side of the sub-fixture close to the lower clamping part. The groove and the convex platform are in clearance fit.

[0017] The beneficial effects of the present utility model are as follows: When the sub-fixture is not placed on the main fixture, an operator uses relevant preferred tools to place the product in the placement groove, and the product is protected by the protective member, so that the product is prevented from being scratched by the tools during the loading and unloading process. The sub-fixture is placed on the lower clamping member through the tool. Through the clearance fit between the convex platform and the groove, the clearance fit between the positioning frame and the placement groove, and the clearance fit between the protective gasket and the positioning frame, the product is quickly and accurately positioned in the middle of the main fixture, as much as possible to avoid the situation that the position of the product is misaligned with the main fixture, and to avoid the edge of the product from being worn. At the same time, the end face of the product is protected by the protective member, so that when the upper clamping member contacts the product during the aging and heat dissipation of the product by the main fixture, the surface of the product will not be bruised, so as to realize the protection of the product, thereby reducing the damage to the product, improving the qualified rate of the product finished product, and further improving the supply progress of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural view of the present utility model;

[0019] Figure 2 is a schematic structural view of the present utility model mainly used to show the structures such as the sub-fixture;

[0020] Figure 3 is a top view of the present utility model used to show the sub-fixture;

[0021] Figure 4 is a side view of the present utility model used to show the sub-fixture;

[0022] Figure 5 is a sectional schematic view of the present utility model used to show the positioning frame;

[0023] Description of the reference numerals: 1 - upper clamping member; 2 - lower clamping member; 3 - connecting rod; 4 - threaded rod; 5 - sub-fixture; 6 - placement groove; 7 - protective gasket; 8 - positioning frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without any creative work shall fall within the protection scope of the present utility model.

[0025] It should be noted that all directional indicators (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the attached drawings). If this specific posture changes, the directional indicators will also change accordingly.

[0026] As Figure 1 and Figure 2 shown, it includes a main fixture. The main fixture includes an upper clamping member 1, a lower clamping member 2, a connecting rod 3, and a threaded rod 4. A secondary fixture 5 is assembled on the lower clamping member 2. The secondary fixture 5 is located at the central position of the lower clamping member 2. The secondary fixture 5 is made of aluminum alloy and has good heat conduction ability. At the same time, the secondary fixture 5 is cylindrical, and the centers of the lower clamping member 2 and the secondary fixture 5 are on the same axis. A boss is fixedly arranged on one side of the secondary fixture 5 close to the lower clamping member 2, and a groove is formed on one side of the lower clamping member 2 close to the upper clamping member 1. The boss is adaptively embedded in the groove and is arranged in a clearance fit, so that the secondary fixture 5 and the lower clamping member 2 can be quickly and accurately positioned.

[0027] As Figure 1 and Figure 3 shown, a placement groove 6 for placing the product is formed on one side of the secondary fixture 5 close to the upper clamping member 1. The placement groove 6 is cylindrical. The bottom wall area of the placement groove 6 is slightly larger than the end face area of the product. The product is circular. The product is placed in the placement groove 6, and the product and the placement groove 6 are arranged in a clearance fit, so as to accurately position the product to the central position of the lower clamping member 2, facilitating the quick placement of the product at the central positions of the upper clamping member 1 and the lower clamping member 2.

[0028] At the same time, four communication grooves are respectively formed on the end face of the secondary fixture 5 close to the upper clamping member 1. The four communication grooves are arranged at equal intervals along the circumference direction of the end face of the secondary fixture 5. The opposite side walls of the communication grooves are respectively communicated with the outer side wall of the secondary fixture 5 and the inner side wall of the placement groove 6. One is to facilitate the measurement of the temperature of the product during the aging test. The product is placed in the placement groove 6 by using the magnetic attraction method of a suction pen, and then the secondary fixture 5 is placed into the groove by clamping the secondary fixture 5 with tweezers, so that the product can be placed at the central position of the lower clamping member 2 more quickly and accurately.

[0029] As Figure 1 and Figure 2 shown, a protective member for preventing damage to the end face of the product is arranged on the secondary fixture 5. The protective member is set as a protective gasket 7. When the product is placed in the placement groove 6, the protective gasket 7 is laid on the side of the product away from the bottom wall of the placement groove 6. The protective gasket 7 is a silver copper sheet. At the same time, the protective gasket 7 is polished and ground to make the protective gasket 7 smooth, so that the protective gasket 7 is laid flat and fits on the product, avoiding indentation and scratching of the product during the process of pressing the product.

[0030] The area of ​​the protective gasket 7 close to the upper clamp 1 is larger than the area of ​​the contact end surface of the upper clamp 1 and the protective gasket 7, so that the upper clamp 1 completely contacts the protective gasket 7, and the protective gasket 7 fully protects the product, so that the upper clamp 1 does not directly contact the product, further strengthening the protection of the product surface and avoiding indentation and wear on the product surface as much as possible; at the same time, a layer of gold is plated on the protective gasket 7 to prevent the protective gasket 7 from oxidizing too quickly, thereby achieving the purpose of extending the service life of the protective gasket 7.

[0031] like Figure 2 and Figure 5 As shown, the positioning member is configured as a positioning frame 8 and the positioning frame 8 is configured as a circular ring. The positioning frame 8 is placed on the product. The positioning frame 8 is made of plastic to avoid damage to the product surface as much as possible. The ring width of the positioning frame 8 is greater than the width of the product passivation layer to avoid the protective gasket 7 from contacting the passivation layer at the edge of the product, thereby increasing protection for the product surface. The outer ring of the positioning frame 8 is gap-fitted with the inner wall of the placement groove 6, and the inner ring of the positioning frame 8 is gap-fitted with the outer side of the protective gasket 7. This facilitates the quick and accurate positioning of the protective gasket 7 at the center of the product, helps the protective gasket 7 to cover the product surface more comprehensively, and thus helps the protective gasket 7 to protect the product.

[0032] The working principle of this embodiment is as follows: when the auxiliary clamp 5 is not placed on the main clamp, it is convenient to clamp the product and place it in the placement groove 6 by means of a suction pen. The product is picked up and placed in the placement groove 6 of the auxiliary clamp 5 by the suction pen to prevent the product from being clamped. At the same time, the protective gasket 7 is placed in the middle of the positioning frame 8 and laid on the surface of the product. The auxiliary clamp 5 is clamped by tweezers and the boss is placed in the groove. The upper clamp 1 is then pressed down to make it tightly contact the surface of the protective gasket 7 and locked by a screw. The auxiliary clamp 5 is separated from the main clamp. Placing the auxiliary clamp 5 outside the main clamp can quickly and conveniently assemble the product, the positioning frame 8, and the protective gasket 7, which can effectively prevent the tweezers from scratching the surface of the product. The boss is coaxial and concentric with the auxiliary clamp 5, and the groove is coaxial and concentric with the main clamp. The boss and the groove are clearance-matched, so that the auxiliary clamp 5 can be quickly and accurately positioned and placed in the middle position of the lower clamp 2.

[0033] The placement groove 6 is coaxial and concentric with the secondary fixture 5. The product has a clearance fit with the placement groove 6, the positioning frame has a clearance fit with the placement groove 6, and the protective gasket 7 has a clearance fit with the positioning frame 8. This enables the product, the positioning frame 8, and the protective gasket 7 to be quickly and accurately positioned and placed at the central position of the secondary fixture 5, thereby achieving quick and accurate positioning among the lower clamping part 2 of the main fixture, the secondary fixture 5, the product, the positioning frame 8, the protective gasket 7, and the upper clamping part 1 of the main fixture. The protective gasket 7 precisely protects the surface of the product, minimizing the risk of the product being damaged when the upper clamping part 1 presses against it. During the aging and heat dissipation processes of the product by the main fixture, the damage to the product is reduced, achieving the protection of the product, improving the qualified rate of the product, and further enhancing the supply progress of the product.

[0034] The above is only the preferred embodiment of the present invention, and it does not limit the patent scope of the present invention. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A semi-bare package product aging fixture, comprising a main fixture, wherein the main fixture comprises an upper fixture (1), a lower fixture (2) and two connecting rods (3), wherein the two ends of the two connecting rods (3) are respectively connected to the upper fixture (1) and the lower fixture (2); characterized in that: The lower clamp (2) is provided with a secondary clamp (5), and a placement groove (6) for placing the product is provided on a side of the secondary clamp (5) close to the upper clamp (1), the bottom wall area of ​​the placement groove (6) is larger than the end surface area of ​​the product, the placement groove (6) and the product clearance are matched, and the secondary clamp (5) is provided with a protective piece for preventing the end surface of the product from being damaged.

2. The semi-bare package product aging fixture as claimed in claim 1, characterized in that: The protective member is configured as a protective gasket (7). When the product is placed in the placement groove (6), the protective gasket (7) is laid on a side of the product away from the bottom wall of the placement groove (6).

3. A semi-bare package product aging fixture as claimed in claim 2, characterized in that: The protective gasket (7) is a silver copper sheet.

4. The semi-bare package product aging fixture as claimed in claim 2, characterized in that: The surface of the protective gasket (7) is plated with a gold layer.

5. The semi-bare package product aging fixture as claimed in claim 2, characterized in that: The area of ​​the protective gasket (7) on the side close to the upper clamp (1) is larger than the area of ​​the end surface of the upper clamp (1) in contact with the protective gasket (7).

6. The semi-bare package product aging fixture as claimed in claim 2, characterized in that: The auxiliary clamp (5) is provided with a positioning piece for preventing the protective gasket (7) from contacting the passivation layer of the product.

7. The semi-bare package product aging fixture as claimed in claim 6, characterized in that: The positioning member is configured as a positioning frame (8) and the positioning frame (8) is placed on a side of the product away from the placement groove (6); the positioning frame (8) is configured in a circular ring shape and the ring width of the positioning frame (8) is greater than the width of the product passivation layer; the outer ring of the positioning frame (8) is gap-matched with the inner wall of the placement groove (6); and the inner ring of the positioning frame (8) is gap-matched with the outer side of the protective gasket (7).

8. The semi-bare package product aging fixture as claimed in claim 7, characterized in that: The positioning frame (8) is made of plastic.

9. The semi-bare package product aging fixture according to claim 1, characterized in that: The auxiliary clamp (5) is provided with a communication groove, and the opposite side walls of the communication groove are respectively connected to the outer side wall of the auxiliary clamp (5) and the inner side wall of the placement groove (6).

10. The semi-bare package product aging fixture according to claim 1, characterized in that: A groove is provided on one side of the lower clamp (2) close to the upper clamp (1), and a protrusion is connected to one side of the auxiliary clamp (5) close to the lower clamp (2), and the groove and the protrusion are in clearance fit.

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