Fishing – trapping – and vermin destroying
Patent
1994-02-16
1995-07-18
Hearn, Brian E.
Fishing, trapping, and vermin destroying
437211, 437214, 437215, 437217, 437220, H01L 2160
Patent
active
054341060
ABSTRACT:
A semiconductor package device is disclosed. In one embodiment, attached by its active face to a lead-on-chip leadframe having leadfingers is an integrated circuit. The integrated circuit has a polyimide coating on its backside. An encapsulating material surrounds the integrated circuit and the lead-on-chip leadframe so that the leadfingers are exposed. The polyimide coating on the backside of the integrated circuit helps to reduce package cracking arising from mounting the device to a printed circuit board by relflow solder.
REFERENCES:
patent: 4862245 (1989-08-01), Pashby et al.
patent: 4903113 (1990-02-01), Frankeny et al.
patent: 4916519 (1990-04-01), Ward
patent: 4965654 (1990-10-01), Karner et al.
patent: 5070039 (1991-12-01), Johnson et al.
Lim Thiam B.
Saitoh Tadashi
Seow Boon Q.
Brady, II Wade James
Donaldson Richard L.
Hearn Brian E.
Holland Robby T.
Picardat Kevin M.
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