Lead frame plastic package structure of unmanned aerial vehicle

Abstract

The utility model discloses a lead frame plastic package structure of unmanned plane, including lead frame, first plastic package spare and second plastic package spare, lead frame is from front to back first base island, second base island, third base island of interval arrangement, first base island, second base island, third base island all are provided with two of left and right symmetrical arrangement, and first base island front side is provided with a plurality of vertical pin, first plastic package spare includes the bottom plate of forming in the bottom side of lead frame and the projection portion of connecting in the interval of bottom plate top and forming in lead frame, and projection portion and bottom plate all correspond first cuttable connecting portion, second cuttable connecting portion, third cuttable connecting portion, fourth cuttable connecting portion, fifth cuttable connecting portion, cuttable material belt are provided with first avoiding groove, second plastic package spare forms in first avoiding groove, and with lead frame, first plastic package spare forms integral. Make lead frame in one time plastic package, the positioning in plastic package mould is convenient, twice plastic package formation, and the structure design is ingenious.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor packaging technology, and in particular to a plastic encapsulation structure for a drone's lead frame. Background Technology

[0002] "Lead Frame Molding" refers to a complete technical solution that uses a lead frame as a chip carrier and encapsulates and protects it through a molding process. The lead frame is a commonly used packaging substrate structure in packaging technology.

[0003] The UAV integrates core chips with multiple functions such as flight control, navigation, communication, and image processing. In order to efficiently and reliably integrate these chips with different functions in a limited space, multi-base island lead frame has become an important packaging solution. The multiple base islands are mainly to achieve high performance, high density, and high reliability integration of multiple chips in a single package, while avoiding mutual interference between signals.

[0004] In the prior art, a lead frame molding structure for a drone is disclosed. The lead frame includes multiple base islands. After the lead frame is stamped, it is directly cut into multiple base islands. Then, the multiple base islands are placed in a molding mold for molding. In this structure, each base island is an independent part. The operation is inconvenient when placing it in the molding mold, and the base islands are prone to displacement during the molding process. This results in the base islands being misaligned on the final molded product, making it impossible to assemble them in the drone. This leads to a high defect rate and increases production costs.

[0005] Therefore, it is necessary to design a new technical solution to solve the above problems. Utility Model Content

[0006] In view of the above, this utility model addresses the deficiencies of the existing technology, and its main objective is to provide a lead frame molding structure for unmanned aerial vehicles (UAVs). By pre-reserving a first, second, third, fourth, and fifth cutable connecting portion and a cutable strip in the lead frame, the lead frame can be easily positioned in the molding mold during the first molding process. After the first molding, the cutting portion is cut, and then a second molding is performed, making the lead frame, the first molding component, and the second molding component a single unit. The second molding process is ingenious, and after the first molding, a first clearance groove is provided. The design of the first clearance groove can prevent damage to the structure of the first molding component during the cutting of the lead frame, thus avoiding affecting the overall sealing performance.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A lead frame encapsulation structure for a drone, comprising: A lead frame, comprising a first base island, a second base island, and a third base island arranged sequentially from front to back, with each of the first, second, and third base islands having two symmetrically arranged base islands. A row of multiple vertically arranged pins is provided on the front side of the first base island. A first cuttable connection is connected between the first base island and the vertical pins. A second cuttable connection is connected between the two first base islands. A third cuttable connection is connected between the first and second base islands. A fourth cuttable connection is connected between the second and third base islands. A fifth cuttable connection is connected between the two second base islands and between the two third base islands. A cuttable strip is connected to the rear side of the two third base islands. The first molding component includes a base plate formed on the bottom side of the lead frame and a protrusion formed on the gap of the lead frame and connected to the top of the base plate. The protrusion and the base plate are provided with a first clearance groove corresponding to the first cuttable connecting part, the second cuttable connecting part, the third cuttable connecting part, the fourth cuttable connecting part, the fifth cuttable connecting part, and the cuttable strip. The second molding compound is formed in the first clearance groove and is integral with the lead frame and the first molding compound.

[0008] As a preferred embodiment, both the first base island and the second base island are provided with a first transverse groove, and the protrusion is also formed in the first groove.

[0009] As a preferred embodiment, the rear end of the third base island has multiple longitudinal second strip grooves, and the protrusion is also formed in the second strip grooves. The two adjacent second strip grooves of the two third base islands are provided with second clearance grooves corresponding to the cuttable strip.

[0010] As a preferred embodiment, one of the plurality of vertical pins located between two first base islands has its first cuttable connection portion connected to a second cuttable connection portion.

[0011] As a preferred embodiment, the spacing between the first base island and the second base island is strip-shaped.

[0012] As a preferred embodiment, the spacing between the second base island and the third base island is Z-shaped.

[0013] As a preferred embodiment, the outer sides of the first base island, the second base island, and the third base island are all provided with downward-extending folded plates, and the bottom of the vertical pin is flush with the bottom of the folded plates.

[0014] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution: The main feature is that by pre-reserving a first, second, third, fourth, and fifth cutable connecting parts and a cutable strip in the lead frame, the lead frame can be easily positioned in the molding die during the first molding process. After the first molding, the cutting parts are cut, and then a second molding is performed, so that the lead frame, the first molding part, and the second molding part are integrated into one piece. The second molding process is ingenious. In addition, after the first molding, a first clearance groove is reserved. The setting of the first clearance groove can prevent damage to the structure of the first molding part and affect the overall sealing performance when cutting the lead frame.

[0015] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0016] Figure 1 This is a perspective view of a preferred embodiment of the present utility model; Figure 2 This is an exploded view of a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of the molding of the first plastic sealant according to a preferred embodiment of the present utility model; Figure 4 This is a schematic diagram of the molding of the first molding component according to a preferred embodiment of the present invention from another perspective; Figure 5 This is an exploded view of the first molding compound and the lead frame of a preferred embodiment of the present invention.

[0017] Explanation of reference numerals in the attached diagram: 10. Lead frame; 11. First base island; 12. Second base island; 13. Third base island; 14. Vertical pin; 15. Folded plate; 101. First cuttable connecting part; 102. Second cuttable connecting part; 103. Third cuttable connecting part; 104. Fourth cuttable connecting part; 105. Fifth cuttable connecting part; 106. Cuttable strip; 107. First groove; 108. Second groove; 109. Second clearance groove; 20. First plastic sealant; 21. Base plate; 22. Protrusion; 201. First clearance groove; 30. Second plastic sealant. Detailed Implementation

[0018] First, it should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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.

[0019] Please refer to Figures 1 to 5 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, including a lead frame 10, a first molding compound 20, and a second molding compound 30.

[0020] The lead frame 10 has a first base island 11, a second base island 12, and a third base island 13 arranged sequentially from front to back. Each of the first base island 11, the second base island 12, and the third base island 13 has two symmetrically arranged on the left and right. The front side of the first base island 11 has a row of vertical pins 14 arranged at intervals. The first base island 11 and the vertical pins 14 are connected by a first cuttable connection part 101. The two first base islands 11 are connected by a second cuttable connection part 102. The first base island 11 and the second base island 12 are connected by a third cuttable connection part 103. The second base island 12 and the third base island 13 are connected by a fourth cuttable connection part 104. The two second base islands 12 and the two third base islands 13 are connected by a fifth cuttable connection part 105. The rear sides of the two third base islands 13 are connected by a cuttable strip 106. Specifically, see 1 and Figure 5 As shown, the first base island 11 and the second base island 12 are each provided with a horizontal first strip groove 107. The rear end of the third base island 13 is provided with multiple vertical second strip grooves 108. The two adjacent second strip grooves 108 of the two third base islands 13 are provided with second clearance grooves 109 corresponding to the cuttable strip 106. One of the multiple vertical pins 14 is located between the two first base islands 11, and its first cuttable connecting part 101 is connected to the second cuttable connecting part 102. The outer sides of the first base island 11, the second base island 12, and the third base island 13 are all provided with downward extending folding plates 15. The bottom of the vertical pin 14 is flush with the bottom of the folding plate 15. In this embodiment, the spacing between the first base island 11 and the second base island 12 is strip-shaped, and the spacing between the second base island 12 and the third base island 13 is Z-shaped.

[0021] See Figure 4 and Figure 5As shown, the first molding compound 20 includes a base plate 21 formed on the bottom side of the lead frame 10 and a protrusion 22 formed on the top of the base plate 21 at a distance from the lead frame 10. The protrusion 22 and the base plate 21 are provided with a first clearance groove 201 corresponding to the first cuttable connecting part 101, the second cuttable connecting part 102, the third cuttable connecting part 103, the fourth cuttable connecting part 104, the fifth cuttable connecting part 105, and the cuttable strip 106. The size of the first clearance groove 201 is larger than the size of the first cuttable connecting part 101, the second cuttable connecting part 102, the third cuttable connecting part 103, the fourth cuttable connecting part 104, the fifth cuttable connecting part 105, and the cuttable strip 106, so as to avoid cutting the first molding compound 20 during cutting and ensure the integrity of the first molding compound 20. Specifically, the protrusion 22 is also formed in the first groove 107 and the second groove 108.

[0022] The second molding compound 30 is formed in the first clearance groove 201 and is integral with the lead frame 10 and the first molding compound 20; specifically, the second molding compound 30 is also formed in the second clearance groove 109.

[0023] The process flow of this embodiment is described in detail below: First step, refer to Figure 5 As shown, the lead frame 10 is first stamped into a state with a first cutable connecting part 101, a second cutable connecting part 102, a third cutable connecting part 103, a fourth cutable connecting part 104, a fifth cutable connecting part 105, and a cutable strip 106, and the lead frame 10 is electroplated at the same time. Step 2, see Figure 3 and Figure 4 As shown, a first molding compound 20 is molded on the lead frame 10, and the first molding compound 20 avoids the cutting position through the first clearance groove 201 and the second clearance groove 109. The third step is to cut off the first cutable connecting part 101, the second cutable connecting part 102, the third cutable connecting part 103, the fourth cutable connecting part 104, the fifth cutable connecting part 105, and the cutable strip 106 on the lead frame 10. Step 4, refer to Figure 1 As shown, the second molding part 30 is formed by molding the cut lead frame 10.

[0024] The key design feature of this utility model is: The main feature is that by pre-reserving a first, second, third, fourth, and fifth cutable connecting parts and a cutable strip in the lead frame, the lead frame can be easily positioned in the molding die during the first molding process. After the first molding, the cutting parts are cut, and then a second molding is performed, so that the lead frame, the first molding part, and the second molding part are integrated into one piece. The second molding process is ingenious. In addition, after the first molding, a first clearance groove is reserved. The setting of the first clearance groove can prevent damage to the structure of the first molding part and affect the overall sealing performance when cutting the lead frame.

[0025] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A lead frame plastic package structure of a drone, characterized in that, include: A lead frame, comprising a first base island, a second base island, and a third base island arranged sequentially from front to back, with each of the first, second, and third base islands having two symmetrically arranged base islands. A row of multiple vertically arranged pins is provided on the front side of the first base island. A first cuttable connection is connected between the first base island and the vertical pins. A second cuttable connection is connected between the two first base islands. A third cuttable connection is connected between the first and second base islands. A fourth cuttable connection is connected between the second and third base islands. A fifth cuttable connection is connected between the two second base islands and between the two third base islands. A cuttable strip is connected to the rear side of the two third base islands. The first molding component includes a base plate formed on the bottom side of the lead frame and a protrusion formed on the gap of the lead frame and connected to the top of the base plate. The protrusion and the base plate are provided with a first clearance groove corresponding to the first cuttable connecting part, the second cuttable connecting part, the third cuttable connecting part, the fourth cuttable connecting part, the fifth cuttable connecting part, and the cuttable strip. The second molding compound is formed in the first clearance groove and is integral with the lead frame and the first molding compound. 2.The lead frame plastic package structure of the unmanned aerial vehicle according to claim 1, wherein: Both the first base island and the second base island have a transverse first strip groove, and the protrusion is also formed in the first strip groove.

3. The lead frame plastic package structure of the unmanned aerial vehicle according to claim 1, wherein: The rear end of the third base island has multiple longitudinal second strip grooves, and the protrusion is also formed in the second strip groove. The two adjacent second strip grooves of the two third base islands are provided with second clearance grooves corresponding to the cuttable strip.

4. The lead frame plastic package structure of the unmanned aerial vehicle according to claim 1, wherein: One of the multiple vertical pins located between two first base islands has its first cuttable connection portion connected to a second cuttable connection portion.

5. The lead frame plastic package structure of the unmanned aerial vehicle according to claim 1, wherein: The spacing between the first base island and the second base island is strip-shaped.

6. The lead frame plastic package structure of the unmanned aerial vehicle according to claim 1, wherein: The spacing between the second and third base islands is Z-shaped.

7. The lead frame plastic package structure of the unmanned aerial vehicle according to claim 1, wherein: The outer sides of the first base island, the second base island, and the third base island all have folded plates extending downwards, and the bottom of the vertical pin is flush with the bottom of the folded plate.

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