Composite frame for plastic package product

Abstract

The utility model discloses a composite frame for plastic package products, which comprises at least two frames which are nested together and are simple in structure, the frames comprise a frame I and a frame II, the frame I is provided with an accommodating area for accommodating the frame II, and the frame I is provided with a plurality of continuous working units I; the first continuous working units are located in the containing area, the two ends of each first continuous working unit are connected with the containing area to form connecting sections, the second frame is provided with a plurality of second continuous working units, the connecting sections of the first frame and the second frame form an overlapping area, the connecting sections of the first frame in the overlapping area are thinned to form an avoiding space, and positioning holes are formed in the first frame and the second frame. A positioning tool is arranged when the first frame and the second frame are combined, positioning pins matched with the positioning holes are arranged on the positioning tool, and when the cutting position of the frame is thick after decomposition design, the frame can be thinned in advance to form a thin cutting area. According to the utility model, a complex frame is changed into a simple frame combined structure, so that the production difficulty of the frame with a complex structure and inconsistent thickness is reduced, and the packaging requirement of a high-power circuit is also met.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor packaging, and more particularly to a composite frame for plastic-sealed products. Background Art

[0002] Plastic encapsulated products are electronic products that are bonded to a single frame, then encapsulated by injection molding and finally shaped and cut as required. Existing product packaging structures, such as Figure 1 As shown in the figure, 101 is the frame, 102 is the chip, 103 is the mounting adhesive, 104 is the bonding wire, and 105 is the encapsulation area. Due to the limitations of the cutting equipment, the frame is a single layer with a relatively thin thickness, generally less than 0.25mm (but not limited to). If the frame is thicker, it is first thinned by etching at the cutting point.

[0003] Currently, the frames of plastic packaging products in the industry are single-layer, with a uniform thickness. Thicker frames require etching to reduce thickness at the cut points. Frame etching has certain limitations, requiring the same etching depth on all sides. Frames with complex structures and inconsistent thicknesses are difficult or impossible to manufacture. However, if a single, thin frame is used throughout, the resulting circuit power is generally low, making it difficult to meet the requirements of high-power circuits.

[0004] Therefore, it is necessary to develop a plastic circuit frame structure that can be used for complex structures and high power to meet the growing demand. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a composite frame for plastic-sealed products, which transforms a complex frame into a simple frame combination structure, facilitates production and processing, and meets high-power usage requirements.

[0006] According to one aspect of the present invention, a composite frame for plastic-sealed products is provided, the composite frame comprising at least two frames with simple structures stacked together, the frames comprising frame one and frame two, frame one being provided with an accommodating area for accommodating frame two, frame one being provided with a plurality of continuous working units one, the continuous working units one being located in the accommodating area and connected to the accommodating area at both ends to form a connecting section, frame two being provided with a plurality of continuous working units two, the frame one being stacked outside frame two and frame two being located in the accommodating area, the connecting section of frame one forming an overlapping area with frame two, and the connecting section of frame one being thinned in the overlapping area to form an avoidance space. Thus, the frame that was originally difficult to produce and process and had a complex structure is decomposed and designed into a variety of frames with simple structures and easy processing. The various frames after the decomposition design can be made of different materials. The overlapping areas of each frame are thinned to form avoidance spaces to ensure that each frame can be combined and assembled. The various frames after the decomposition design are combined together in sequence, and after the combination and fixation are completed, they are removed for use. The combined composite frame is normally loaded, bonded, encapsulated, cut and formed until it is a finished product. The design scheme provided by the utility model decomposes the complex frame into a variety of frames, which is conducive to the design of complex multi-island frames. In this way, the production of frames with complex structures and inconsistent thicknesses becomes simplified.

[0007] In some embodiments, frame 2 is provided with positioning hole 2, and frame 1 is provided with positioning hole 1. When frames 1 and 2 are nested, a positioning fixture is provided, and the positioning fixture is provided with positioning pins that match positioning holes 1 and 2. Thus, each frame is designed with positioning holes, and the positioning fixture is used to assemble the frames, ensuring that the frames can be assembled in an orderly and precise manner.

[0008] In some embodiments, the second positioning holes of the frame 2 are provided with at least three, and the three second positioning holes are respectively provided at three of the four corners of the frame 2. Thus, the frame 2 in the inner position is provided with three positioning points, ensuring the accurate position of the assembled composite frame.

[0009] In some embodiments, the composite frame has a tool setting mark, and the tool setting mark is set on the second frame. Thus, by setting the tool setting mark on one of the frames, the composite frame also has the tool setting mark, ensuring that subsequent cutting can be accurate.

[0010] In some embodiments, the composite frame is thinned at the cutting portion to form a thinning area, and the thinning area is located on frame 1 and / or frame 2. Thus, after the decomposition design, for thicker frames, the cutting portion can be thinned in advance to facilitate unit cutting.

[0011] In some embodiments, the frames are stacked and positioned and then fixed with tape or adhesive. Thus, after the frames are assembled and fixed, a composite frame is formed, which can be normally loaded, bonded, packaged, and cut into shape like a conventional frame.

[0012] Compared with the prior art, the beneficial effects of the present invention are: the present invention provides a composite frame for plastic-sealed products with a novel structural design. The original complex frame structure, which is difficult to process or cannot be processed, is decomposed into several frames with simple structures and easy to process. The materials and thicknesses of the frames can also be different. The decomposed independent frames are then combined in sequence for use. When combining, each frame needs to be positioned and combined into one by using its positioning holes through positioning tooling. The combined composite frame is normally loaded, bonded, encapsulated, and cut into shape until it is a finished product. For thicker frames, thinning treatment can be performed in advance at the tool cutting position of the corresponding frame to facilitate unit cutting. The design structure provided by the present invention is conducive to the design of complex multi-island frames, reduces the production difficulty of frames with complex structures and inconsistent thicknesses, and also meets the packaging requirements of high-power circuits. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of a conventional chip packaging structure in the background art, wherein: Figure 1 A is a top view of a unit. Figure 1 B is Figure 1 A cross-sectional view of AA in A;

[0014] Figure 2 This is a schematic diagram of a frame 2 of an embodiment of a composite frame for plastic-sealed products of the present invention;

[0015] Figure 3 This is a schematic diagram of a frame 1 of an embodiment of a composite frame for plastic-sealed products of the present invention;

[0016] Figure 4 This is a structural diagram of an embodiment of a composite frame for plastic-sealed products of the present invention, in which frame 1 and frame 2 are combined;

[0017] Figure 5 This is a schematic structural diagram of a positioning tool for a composite frame of a plastic-sealed product according to the present invention, wherein: Figure 5 A is the top view, Figure 5 B is Figure 5 A side view, Figure 5 C is Figure 5 Schematic diagram of AA in A;

[0018] Figure 6 This is a structural diagram of a unit of a frame 2 of an embodiment of a composite frame for plastic-sealed products of the present invention, wherein: Figure 6 A is a three-dimensional diagram of a unit of frame 2. Figure 6 B is the top view of 6A, Figure 6 C is the side view of 6A, Figure 6 D is the dorsal view of 6A;

[0019] Figure 7 This is a structural diagram of a unit of a frame of an embodiment of a composite frame for plastic-sealed products of the present invention, wherein: Figure 7 A is the stereogram of frame 2, Figure 7 B is the top view of 7A, Figure 7 C is the side view of 7A, Figure 7 D is the dorsal view of 7A;

[0020] Figure 8 8A is a schematic diagram of a unit of a composite frame for plastic-sealed products of the present invention, wherein 8A is a perspective view, 8B is a top view of 8A, and 8C is a side view of 8A;

[0021] Figure 9 It is a composite frame unit installation diagram, wherein 9A is a top view and 9B is a schematic diagram of EE in 9A;

[0022] Figure 10 This is a schematic diagram of an assembly embodiment of a composite frame for plastic-sealed products of the present invention. In the figure, frame 1 and frame 2 are positioned and assembled on a positioning fixture, wherein: Figure 10 A is the top view, Figure 10 B is Figure 10 A side view, Figure 10 C is Figure 10 Schematic diagram of BB in A. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with specific implementation methods.

[0024] like Figure 4 As shown, one embodiment of the present invention, a composite frame for plastic-encapsulated products, breaks down a complex frame structure that is difficult or impossible to process into several simple, easily processable frames. The assembled frames are then reassembled in sequence. The assembled composite frame can be normally loaded, bonded, encapsulated, and cut into shape until it is a finished product.

[0025] The composite frame includes at least two frames with simple structures that are nested together. The number of frames in the decomposed design is not limited to two, and can be designed to be decomposed into multiple frames according to actual product needs.

[0026] In this embodiment, Figures 2 to 4As shown, the frame includes frame 1 and frame 2 2, and the outer shapes of frame 1 and frame 2 2 are both rectangular. A receiving area 11 for accommodating frame 2 2 is provided in frame 1 1, and the outline of the receiving area 11 matches the outer shape of frame 2 2. Frame 1 has several continuous working units 12, and the continuous working units 12 are located in the receiving area 11 and are connected to the receiving area 11 at both ends to form a connecting section 13. Frame 2 2 has several continuous working units 21. Working unit 12 and working unit 2 21 are both effective working units of the frame, and are the working units required for the subsequent cut products. The decomposed frames can be superimposed in the thickness direction when combined, but are not limited to this combination. In this embodiment, frame 1 is nested outside frame 2, and frame 2 is located in the accommodation area 11. The connecting section 13 of frame 1 forms an overlapping area 14 with frame 2. In the overlapping area 14, the connecting section 13 of frame 1 is etched and thinned in advance during its manufacture to form an avoidance space 15 to ensure that frame 1 and frame 2 can be combined together.

[0027] After the frames are stacked and positioned, they are fixed with tape or adhesive. In actual applications, the fixing methods are not limited to these two methods. After the frames are combined and fixed, a composite frame is formed. Like the conventional frames, it can be loaded, bonded, encapsulated, cut and formed normally. Figure 9 shown.

[0028] The frames after decomposition design can be made of different materials and thicknesses, and the depth of the grooves on the top and back surfaces of the frames can also be inconsistent. Figure 6 This is a schematic diagram of a unit of framework 2, which has 6 bonding fingers. Figure 7 This is a schematic diagram of a unit of frame 1. Figure 8 This is a schematic diagram of a unit formed by combining frame 1 and frame 2. Figure 8 As can be seen from the figure, there are two depths, A and B, on the top surface, and two depths, C and D, on the back surface.

[0029] To ensure that each frame can be assembled in an orderly and accurate manner, each frame is designed with a positioning hole, and then the frames are assembled together through the positioning tool 3. Figure 2 As shown, the frame 2 is provided with a second positioning hole 22. The frame 2 has at least three second positioning holes 22, which are respectively provided at three of the four corners of the frame 2. Figure 3 As shown, the frame 1 is provided with a positioning hole 16. Figure 5 and 10 As shown, when the frame 1 and the frame 2 are nested, a positioning fixture 3 is provided. The positioning fixture 3 has a positioning pin 31 that matches the positioning hole 16 and the positioning hole 2 22 .

[0030] like Figure 4 As shown, the composite frame has a tool identification point 23, specifically, the tool identification point 23 is set on the frame 2. In this way, the tool identification point 23 is set on one of the frames, so that the combined composite frame also has the tool identification point 23, ensuring that subsequent precise cutting can be achieved.

[0031] like Figure 4 As shown, for thicker frames, the cutouts of the composite frame can be thinned by etching to form thinning regions 17. Thinning regions 17 are positioned on the desired frame according to the thickness. In this embodiment, thinning regions 17 are located on frame 1. These thinning regions 17 are pre-processed during the fabrication of frame 1 after decomposition and design. This pre-processing of the cutouts facilitates unit cutting.

[0032] The present invention provides a composite frame for plastic-sealed products with a novel structural design. The original complex frame structure, which is difficult to process or cannot be processed, is decomposed into several frames with simple structures and easy to process. The materials and thicknesses of the frames can also be different. The decomposed independent frames are then combined in sequence for use. When combining, each frame needs to be positioned by a positioning tool 3 using its positioning hole and then fixed as a whole. The combined composite frame is normally loaded, bonded, encapsulated, and cut into shape until it is a finished product. For thicker frames, thinning treatment can be performed in advance at the tool cutting position of the corresponding frame to facilitate unit cutting. The design structure provided by the present invention is conducive to the design of complex multi-island frames, reduces the production difficulty of frames with complex structures and inconsistent thicknesses, and also meets the packaging requirements of high-power circuits.

[0033] The above are only some embodiments of the present invention. It should be pointed out that for ordinary technicians in this field, other variations and improvements can be made without departing from the creative concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A composite frame for plastic-sealed products, characterized in that: The composite frame comprises at least two frames of simple structure which are nested together, the frames comprising frame one (1) and frame two (2), the frame one (1) being provided with a receiving area (11) for receiving frame two (2), the frame one (1) being provided with a plurality of continuous working units one (12), the continuous working units one (12) being located in the receiving area (11) and being connected to the receiving area (11) at both ends to form a connecting section (13), the frame two (2) being provided with a plurality of continuous working units two (21), the frame one (1) being nested outside the frame two (2) and the frame two (2) being located in the receiving area (11), the connecting section (13) of the frame one (1) forming an overlapping area (14) with the frame two (2), and the connecting section of the frame one (1) being thinned in the overlapping area (14) to form an avoidance space (15).

2. The composite frame for plastic-sealed products according to claim 1, characterized in that: The second frame (2) is provided with a second positioning hole (22), and the first frame (1) is provided with a first positioning hole (16). When the first frame (1) and the second frame (2) are nested, a positioning tool (3) is provided. The positioning tool (3) is provided with a positioning pin (31) that matches the first positioning hole (16) and the second positioning hole (22).

3. The composite frame for plastic-sealed products according to claim 2, characterized in that: The second positioning holes (22) of the second frame (2) are provided with at least three, and the three second positioning holes (22) are respectively arranged at three of the four corners of the second frame (2).

4. The composite frame for plastic-sealed products according to claim 1, characterized in that: The composite frame has a tool setting identification point (23), and the tool setting identification point (23) is arranged on the second frame (2).

5. The composite frame for plastic-sealed products according to claim 1, characterized in that: The cutting portion of the composite frame is thinned to form a thin cutting area (17), and the thinned thin cutting area (17) is located on the first frame (1) and / or the second frame (2).

6. The composite frame for plastic-sealed products according to claim 1, characterized in that: After the frames are stacked and positioned, they are fixed by adhesive tape or adhesive.

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