Fishing – trapping – and vermin destroying
Patent
1994-06-06
1996-09-10
Picardat, Kevin M.
Fishing, trapping, and vermin destroying
437209, 437214, 437217, 437219, 437220, H01L 2160
Patent
active
055545696
ABSTRACT:
A leadframe (11) and a method for improving adhesion of a polymer (17, 19) to the leadframe (11). The leadframe (11) has a flag (14) having a top surface (15) and a bottom surface (18), and leads (12). Microscopic locking features (31) are formed in the top surface (15) and the bottom surface (18) of flag (14) by bombarding the flag (14) with a grit material. Thus, the top and bottom surfaces (14, 18) are roughened. A semiconductor die (13) is attached to the flag (14) by a die attach material (17) and the flag (13), the semiconductor material (13), and portions of the leads (12) are encapsulated by a molding compound. The pits improve the adhesion of the die attach material (17) and the molding compound (19) to the leadframe (11).
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Berg Howard M.
Ganesan Sankaranarayanan
Dover Rennie William
Motorola Inc.
Picardat Kevin M.
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