Overflow glue removing mechanism and method thereof

Abstract

The invention discloses an overflow glue removing mechanism comprising a transmission device and a cutter device, wherein the transmission device is used for carrying and transmitting a plurality of mould sealing chips to a specific position of the transmission device; and the cutter device is arranged in the specific position for damaging the connection of overflow glue of the mould sealing chipsand a conducting wire rack. The overflow glue removing mechanism has the advantages that the cutter device also comprises an upper movable piece and a lower movable piece; when the mould sealing chips are transmitted between the upper movable piece and the lower movable piece by the transmission device, the lower movable piece is in contact with the overflow glue to damage the connection of the overflow glue and the conducing wire rack by the opposite movement of the upper movable piece and the lower movable piece, thereby a hole is formed between the overflow glue and the conducting wire rack, and the lower movable piece and the upper movable piece move to a position end point due to the opposite movement to form a gap.

Description

technical field [0001] The invention relates to a mechanism and method for removing glue overflow, in particular to a mechanism and method for removing glue overflow from a lead frame of a molded chip. Background technique [0002] In the past, in the chip packaging process of semiconductors, when multiple chips on a lead frame were molded, the chips on the lead frame were still connected to each other through the lead frame. There is a small amount of mold flash in the vicinity and around the molded chip, and the overflowed glue usually adheres to the lead frame around the molded chip. When the mold flash is too thick, it cannot be removed by the subsequent flushing process , resulting in the subsequent molding of each molded chip, the overflow tape will be accidentally applied to the pins of the molded finished products of each molded chip to cause product contamination, which will lead to bridging or false soldering when the subsequent molded chips are put on the board. ...

AI Technical Summary

Problems solved by technology

[0004] Due to the relative movement of the upper and lower movable parts 131, 132 of the cutter device 13 to break through the local lead frame 11 of the molded chip 10 to form a through hole 110 on the lead frame 11, although the overflow glue 12 can be removed from the lead frame 11 However, this method of using the cutter device 13 to penetrate the lead frame 11 makes the joint area between the molded chip 10 and the lead frame 11 smaller and may cause fractures, making the molded chip 10 easy to separate from the connected lead frame 11 while falling

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