Jig for chip welding

Abstract

The utility model discloses a jig for chip welding, which belongs to the technical field of semiconductor packaging and comprises a connecting handle and a pressing finger, the pressing finger is arranged on the connecting handle and comprises a connecting portion, two pressing rods and two protrusions, the connecting portion is detachably connected to the connecting handle, the two pressing rods are both fixedly connected to the connecting portion, and the two protrusions are arranged on the connecting portion. The two protrusions are fixedly connected to the two pressing rods correspondingly. According to the utility model, through the arrangement of the two bulges, when the jig is adjusted, the position adjusting distance between the inclined surfaces of the two pressing rods and the finger is larger, the contact between the two pressing rods and the finger of the frame is reduced, and the problems of pressing injury of the finger of the frame, insufficient welding and loose welding of a product and the like are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor packaging, and more specifically to a jig for chip welding. Background Art

[0002] Semiconductor packaging refers to the process of processing tested wafers into independent chips according to product models and functional requirements. The packaging process is as follows: the wafers from the front-end process of the wafer are cut into small chips (Die) through a dicing process, and then the cut chips are glued to the small islands of the corresponding substrate (lead frame) frame, and then ultra-fine metal (gold, tin, copper, and aluminum) wires or conductive resins are used to connect the bonding pads (Bond Pad) of the chip to the corresponding pins (Lead) of the substrate to form the required circuit; then the independent chips are encapsulated and protected with a plastic shell.

[0003] At present, packaging is a common semiconductor processing technology. Its original definition is to protect circuit chips from the influence of the surrounding environment. One of the important steps is the wire bonding process. When the chip is processed in the wire bonding process, in order to prevent welding deviation and shaking of the product, the product needs to be kept tightly fixed during the welding process. Therefore, a special welding jig is required. However, when the traditional jig used for chip welding fixes the product, the finger part of the frame is higher than the chip surface. When adjusting the pressing finger, the inclined surface below the pressing finger is easily in contact with the frame finger due to the limited position, causing the frame finger to be crushed, thereby causing the product to have cold solder joints and desoldering. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a jig for chip welding, aiming to solve the problem that when the traditional jig for chip welding in the prior art is fixing the product, the finger part of the frame is higher than the surface of the chip, and when adjusting the pressing finger, the inclined surface below the pressing finger is easily in contact with the frame finger due to the limited position, causing the frame finger to be crushed, thereby causing the product to have cold solder joints and desoldering.

[0006] 2. Technical solution

[0007] In order to solve the above problems, the utility model adopts the following technical solutions:

[0008] A jig for chip welding comprises a connecting handle and a pressing finger, wherein the pressing finger is arranged on the connecting handle, the pressing finger comprises a connecting portion, two pressing rods and two protrusions, the connecting portion is detachably connected to the connecting handle, the two pressing rods are fixedly connected to the connecting portion, and the two protrusions are respectively fixedly connected to the two pressing rods.

[0009] As a preferred solution of the utility model, the pressing finger is set to an inclination angle of 0-45°.

[0010] As a preferred solution of the utility model, a connecting groove is provided on the connecting portion, and a connecting screw is threadedly connected between the connecting groove and the connecting handle.

[0011] As a preferred solution of the utility model, a mounting opening is provided on the connecting handle, and the mounting opening passes through the upper and lower ends of the connecting handle.

[0012] 3. Beneficial effects

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] 1) In this solution, the entire fixture is installed on the upper side of the chip welding area using a connecting handle, and is pressed down onto the frame through two protrusions under the two pressure rods, making the force-bearing area more solid and reducing cold soldering and desoldering, thereby increasing the pressing contact ability of the welding part of the wire frame, reducing shaking during welding and indentations on the frame fingers during pressing with the fingers. Through the setting of the two protrusions, when adjusting the fixture, the position adjustment distance between the inclined surfaces of the two pressure rods and the fingers is larger, reducing the contact between the two pressure rods and the frame fingers, avoiding injuries to the frame fingers and problems such as cold soldering and desoldering of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a comparative reference diagram of the present utility model;

[0016] Figure 2 It is the front view of the utility model;

[0017] Figure 3 It is a three-dimensional diagram of the utility model.

[0018] Description of the numbers in the figure:

[0019] 1. Connecting handle; 2. Pressing finger; 21. Connecting part; 22. Pressing rod; 23. Protrusion; 5. Connecting groove; 6. Connecting screw; 7. Mounting port. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] Example:

[0024] See also Figure 1-3 A chip welding jig includes a connecting handle 1 and a pressing finger 2. The pressing finger 2 is arranged on the connecting handle 1. The pressing finger 2 includes a connecting portion 21, two pressing rods 22 and two protrusions 23. The connecting portion 21 is detachably connected to the connecting handle 1. The two pressing rods 22 are fixedly connected to the connecting portion 21. The two protrusions 23 are respectively fixedly connected to the two pressing rods 22.

[0025] In this embodiment, the connecting handle 1 is installed on the upper side of the chip so that the pressing finger 2 corresponds to the chip. The connecting portion 21 is used to connect the connecting handle 1 and the two pressing rods 22. The two protrusions 23 are pressed down to the frame through the two pressing rods 22, so that the force bearing area during chip welding is more solid, reducing cold solder joints and desoldering. When the fixture is adjusted, the position adjustment distance between the two pressing rods 22 and the fingers is larger, reducing the contact between the two pressing rods 22 and the frame fingers.

[0026] Specifically, the pressing finger 2 is set to an inclination angle of 0-45°.

[0027] In this embodiment, the entire pressing finger 2 has a certain tilt angle, which enables the two protrusions 23 to be accurately pressed and fixed to the chip product during welding, thereby preventing the two pressing rods 22 from contacting the frame fingers.

[0028] Specifically, a connecting groove 5 is formed on the connecting portion 21 , and a connecting screw 6 is threadedly connected between the connecting groove 5 and the connecting handle 1 .

[0029] In this embodiment, the connecting screw 6 is threadedly connected between the connecting handle 1 and the connecting groove 5 to achieve the connection between the connecting portion 21 and the connecting handle 1 .

[0030] Specifically, a mounting opening 7 is provided on the connecting handle 1 , and the mounting opening 7 passes through the upper and lower ends of the connecting handle 1 .

[0031] In this embodiment, the connection handle 1 is more conveniently installed on the upper side of the chip through the installation opening 7, ensuring that the fixture is stably used on the upper side of the chip.

[0032] Working principle: By installing the connecting handle 1 on the upper side of the chip, the pressing finger 2 corresponds to the chip. When the chip product is welded, the connecting handle 1 drives the connecting part 21 to move downward, so that the two protrusions 23 are pressed down to the frame through the two pressing rods 22. By adding the two protrusions 23, the position adjustment distance between the two pressing rods 22 and the fingers is larger when the fixture is adjusted, reducing the contact between the two pressing rods 22 and the frame fingers.

[0033] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the utility model according to the technical solution and improved ideas of the utility model, which should be included in the protection scope of the utility model.

Claims

1. A chip welding jig, comprising a connecting handle (1) and a pressing finger (2), characterized in that: The pressing finger (2) is arranged on the connecting handle (1), and the pressing finger (2) comprises a connecting portion (21), two pressing rods (22) and two protrusions (23); the connecting portion (21) is detachably connected to the connecting handle (1), the two pressing rods (22) are both fixedly connected to the connecting portion (21), and the two protrusions (23) are respectively fixedly connected to the two pressing rods (22).

2. A chip welding jig according to claim 1, characterized in that: The pressing finger (2) is set to have an inclination angle of 0-45°.

3. A chip welding jig according to claim 2, characterized in that: The connecting portion (21) is provided with a connecting groove (5), and a connecting screw (6) is threadedly connected between the connecting groove (5) and the connecting handle (1).

4. A chip welding jig according to claim 3, characterized in that: The connecting handle (1) is provided with a mounting opening (7), and the mounting opening (7) passes through the upper and lower ends of the connecting handle (1).

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