Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2006-06-05
2008-10-14
Nguyen, Donghai D. (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S401100, C029S843000, C174S528000, C257S666000, C438S123000, C438S459000
Reexamination Certificate
active
07434310
ABSTRACT:
A process for reforming a plastic packaged integrated circuit die (100) includes grinding away (305) a bottom side (210) of a plastic package (205) and portions of a set of leads (110) that are in the plane of the grinding until a bottom surface (240) of an inner portion (230) of the set of leads is exposed at a peripheral region (235) of the inner portion, cutting (310) approximately perpendicularly to the top and bottom sides to remove portions of the plastic package and the set of leads that are outside the inner portion of the set of leads, and adapting (320) the bottom surfaces of the inner portion of the set of leads for reliable electrical connections.
REFERENCES:
patent: 5157480 (1992-10-01), McShane et al.
patent: 6350664 (2002-02-01), Haji et al.
patent: 6429028 (2002-08-01), Young
patent: 6548328 (2003-04-01), Sakamoto et al.
Dean Timothy B.
Deemer Bruce C.
Rooney Daniel T.
Curtis Anthony P.
Lamb James
Motorola Inc.
Nguyen Donghai D.
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