A kind of jig for automatic gold wire bonding of COS package device

Abstract

The utility model discloses a kind of for COS encapsulation device automatic gold wire bonding's fixture, for automatic gold wire bonding machine, including strip, the width of the strip is same with the track width in automatic gold wire bonding machine, the length of the strip is matched with the interval between heating station and blanking station in automatic gold wire bonding machine;The placement hole is set on the strip, the both ends of the placement hole are equipped with bearing step, the fishbone fixture is placed on the bearing step, the pad block is tightly connected at the bottom of the fishbone fixture, the size of the pad block is less than the size of the placement hole;It is satisfied to carry and automatic gold wire bonding to COS encapsulation device in automatic gold wire bonding machine.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor laser packaging technology, and in particular to a fixture for automatic gold wire bonding of COS packaged devices. Background Technology

[0002] COS packaging is a common semiconductor packaging process. COS packaged devices are mounted on a dedicated herringbone fixture for testing and aging. The herringbone fixture has a large product clamping capacity, allowing it to be placed on a KS automatic gold wire bonding machine for wire bonding. However, directly placing the herringbone fixture into the automatic gold wire bonding machine does not match the track structure and heat conduction method of the heating block. Therefore, further improvements to the herringbone fixture are needed to ensure that it can support COS packaged devices and achieve gold wire bonding in the automatic gold wire bonding machine. Utility Model Content

[0003] The purpose of this utility model is to provide a fixture for automatic wire bonding of COS packaged devices, which supports the COS packaged devices and is adapted to be moved and wire bonded in an automatic wire bonding machine.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A fixture for automated wire bonding of COS packaged devices, used in an automated wire bonding machine, includes a strip of material. The width of the strip is the same as the width of the track in the automated wire bonding machine, and the length of the strip matches the distance between the heating station and the unloading station in the automated wire bonding machine. The strip has placement holes, and bearing steps are provided at both ends of the placement holes. A herringbone fixture is placed on the bearing steps, and a pad is securely connected to the bottom of the herringbone fixture. The size of the pad is smaller than the size of the placement hole.

[0005] Preferably, the bottom of the pad has three hollow structures with downward openings and spaced apart.

[0006] Preferably, the long edge of the material strip is provided with a stepped structure located on the top and bottom surfaces of the material strip.

[0007] Preferably, the thickness of the fishbone fixture is less than the depth of the bearing step.

[0008] Preferably, the fishbone fixture includes a base plate, a slot plate, a support plate, and a cover plate that are stacked sequentially from bottom to top and fastened together by fasteners. The support plate is provided with support portions at both ends, which are used to be placed on the bearing steps.

[0009] Preferably, the support plate has two connecting holes that pass through the fishbone fixture, and fasteners pass through the connecting holes and are locked onto the pad.

[0010] Preferably, the support portion has a first notch structure that opens outwards.

[0011] Preferably, a second notch structure with an inward opening is provided on the side wall where the long side of the placement hole is located.

[0012] Preferably, each of the placement holes has a third notch structure at the corner, with its center line located outside the edge of the placement hole, and the third notch structure is C-shaped.

[0013] Beneficial effects: By matching the width of the strip to the width of the track and the length to the heating station and the unloading station, the components on the strip can be adapted to move in the automatic wire bonding machine and can be operated simultaneously at the heating station and the unloading station. Placement holes are made on the material strip and a bearing step is set, so that a fishbone fixture can be placed in the placement hole for positioning COS packaged devices; after the fishbone fixture is placed, a pad is fastened to its bottom so that the pad is located below the material strip and can reliably contact the heating block at the processing station to achieve heat conduction and complete the gold wire bonding. The improved fixture structure can adapt to the requirements of the automatic gold wire bonding machine for positioning, movement, heating, and unloading. At the same time, the fishbone fixture is improved to adapt to the heat conduction in contact with the heating block at the heating station, so that the automatic gold wire bonding machine can meet the requirements of gold wire bonding of COS packaged devices. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is an exploded structural diagram of an embodiment of the present utility model; Figure 3 This is a schematic diagram of the connection between the fishbone jig and the pad in an embodiment of this utility model; Figure 4 This is a first-view structural diagram of the material strip in an embodiment of the present invention; Figure 5 This is a second-view structural diagram of the material strip in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the pad block in an embodiment of this utility model; exist Figures 1 to 6 In the diagram, the correspondence between component names or lines and the drawing numbers is as follows: Material strip 1, step structure 101, placement hole 2, bearing step 3, fishbone fixture 4, base plate 41, groove plate 42, support plate 43, cover plate 44, connecting hole 45, first notch structure 46, second notch structure 47, third notch structure 48, pad block 5, hollow structure 50. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] See Figures 1-6 As shown in the figure, an embodiment of this utility model proposes a fixture for automatic wire bonding of COS packaged devices. This fixture is used in an automatic wire bonding machine and includes a material bar 1. The width of the material bar 1 is the same as the width of the track in the automatic wire bonding machine, and the length of the material bar 1 matches the distance between the heating station and the unloading station in the automatic wire bonding machine. By matching the width and length of the material bar 1, it is ensured that the material bar 1 can move on the track as a moving base, thus serving as a transport base structure between various stations. Simultaneously, the device carried at one time can be operated simultaneously at the heating station and the unloading station, further improving bonding efficiency.

[0017] To ensure that COS packaged devices can be loaded into an automatic wire bonding machine for bonding, placement holes 2 are provided on the material strip 1. Supporting steps 3 are provided at both ends of the placement holes 2. A fishbone fixture 4 is placed on the supporting steps 3. The fishbone fixture 4 is used to load the COS packaged devices. After being placed through the placement holes 2 and supporting steps 3, the fishbone fixture 4 moves with the material strip 1 to various workstations. Since the fishbone fixture 4 cannot directly contact the heating block, a pad 5 is securely connected to the bottom of the fishbone fixture 4. The size of the pad 5 is smaller than the size of the placement hole 2, allowing it to protrude through the placement hole 2. Its height is sufficient to reliably contact the heating block at the heating station for heat conduction, ensuring that the welding blade can contact the product's welding surface. This prevents the spark rod on the welding mechanism from hitting the fishbone fixture 4 during movement, thereby achieving wire bonding of the COS packaged devices.

[0018] The above structure enables the loading, moving, and wire bonding of COS packaged devices in an automated wire bonding machine, thereby further expanding the application of automated wire bonding machines and satisfying the wire bonding needs of COS packaged devices.

[0019] To reduce the mass of the pad 5 and increase its temperature change rate, enabling the COS packaged device in the fishbone fixture 4 above the pad 5 to heat up rapidly to the required temperature, avoid equipment temperature control alarms, and improve production continuity, the bottom of the pad 5 has three downward-opening, spaced-apart hollow structures 50. The purpose of dividing it into three hollow sections is to prevent vacuum leakage when the pad 5 is on the heating block, thus ensuring the pad 5 is properly held. Because the fishbone fixture 4 performs wire bonding in two stages during the wire bonding process, requiring one step, the pad 5 needs to be hollowed out in stages to ensure that there is no vacuum leakage when the pad 5 is on the heating block during the two-stage wire bonding process.

[0020] In order to facilitate the feeding gripper to pick up the material bar 1 and move it onto the track of the automatic wire bonding machine, a stepped structure 101 is provided at the long edge of the material bar 1 on the top and bottom surfaces of the material bar 1. By setting the stepped structure 101, the thickness of the long edge is kept to meet the requirements of the feeding gripper for clamping and moving.

[0021] To avoid the risk of interference caused by the material strip 1 protruding from the fishbone fixture 4, the thickness of the fishbone fixture 4 should be less than the depth of the bearing step 3.

[0022] The fishbone fixture 4, used to clamp COS packaged devices, still employs existing technology. In this embodiment, the main optimization lies in matching the placement hole 2 and the supporting step 3 to further optimize the fishbone fixture 4, while the clamping method and principle remain unchanged. Specifically, the fishbone fixture 4 includes a base plate 41, a slot plate 42, a support plate 43, and a cover plate 44, which are stacked sequentially from bottom to top and fastened together by fasteners. The support plate 43 has support portions located at both ends, which are used to place the fixture on the supporting step 3. These support portions support the entire fishbone fixture 4 on the supporting step 3 and maintain its stability.

[0023] The support plate 43 has two connecting holes 45 that pass through the fishbone fixture 4. Fasteners pass through the connecting holes 45 and are locked onto the pad 5. By locking the pad 5, a tight contact is ensured to achieve reliable heat conduction. At the same time, the pad 5 and the fishbone fixture 4 are integrated, making it easy to place directly onto the material strip 1.

[0024] In order to facilitate the clamping, placement or movement of the fishbone fixture 4, a first notch structure 46 with an outward opening is provided on the support part, which facilitates clamping operations from both ends of the support part.

[0025] Meanwhile, a second notch structure 47 with an inward opening is provided on the side wall where the long side of the placement hole 2 is located, which facilitates clamping operations from both sides of the support.

[0026] Furthermore, to facilitate clamping from all four corners, a third notch structure 48 with its center line located outside the edge of the placement hole 2 is provided at each corner of the placement hole 2. The third notch structure 48 is C-shaped, and the clamping part of the workpiece can extend into the third notch structure 48 to clamp the entire fishbone fixture 4. This allows for clamping of the fishbone fixture 4 from multiple angles under different clamping conditions, facilitating material movement during automatic bonding.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A fixture for automatic gold wire bonding of COS packaged devices, used in an automatic gold wire bonding machine, characterized in that: Includes a strip (1), the width of which is the same as the track width in the automatic gold wire bonding machine, and the length of which matches the distance between the heating station and the unloading station in the automatic gold wire bonding machine; The material strip (1) has a placement hole (2), and the two ends of the placement hole (2) are provided with bearing steps (3). A fishbone fixture (4) is placed on the bearing steps (3), and a pad (5) is fastened to the bottom of the fishbone fixture (4). The size of the pad (5) is smaller than the size of the placement hole (2).

2. The fixture for automatic gold wire bonding of COS packaged devices according to claim 1, characterized in that: The bottom of the pad (5) has three hollow structures (50) with downward openings and spaced apart.

3. The fixture for automatic gold wire bonding of COS packaged devices according to claim 2, characterized in that: Each of the material strips (1) has a stepped structure (101) located on the top and bottom surfaces of the material strip (1) at the long edge.

4. The fixture for automatic gold wire bonding of COS packaged devices according to claim 3, characterized in that: The thickness of the fishbone fixture (4) is less than the depth of the bearing step (3).

5. A fixture for automatic gold wire bonding of COS packaged devices according to claim 4, characterized in that: The fishbone fixture (4) includes a base plate (41), a slot plate (42), a support plate (43), and a cover plate (44) that are stacked from bottom to top and fastened together by fasteners. The support plate (43) is provided with support parts located at both ends, and the support parts are used to be placed on the bearing steps (3).

6. A fixture for automatic gold wire bonding of COS packaged devices according to claim 5, characterized in that: The support plate (43) has two connecting holes (45) that pass through the fishbone fixture (4), and fasteners pass through the connecting holes (45) and are locked onto the pad (5).

7. A fixture for automatic gold wire bonding of COS packaged devices according to claim 6, characterized in that: The support portion is provided with a first notch structure (46) that opens outward.

8. A fixture for automatic gold wire bonding of COS packaged devices according to claim 7, characterized in that: The placement hole (2) has a second notch structure (47) that opens inward on the side wall where the long side is located.

9. A fixture for automatic gold wire bonding of COS packaged devices according to claim 8, characterized in that: Each of the placement holes (2) is provided with a third notch structure (48) with its center line located outside the edge of the placement hole (2), and the third notch structure (48) is C-shaped.

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