Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1988-03-21
1989-08-15
Tolin, Gerald P.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
357 81, 361398, 361414, 174 685, H05K 720
Patent
active
048580732
ABSTRACT:
A semiconductor fabrication having thermal characteristics comparable to hybrid ceramic packages comprises a flexible copper foil printed circuit on a thin polyimide film layer thermally laminated to a metal surface, such as aluminum, with a high temperature thermal plastic, such as polyetherimide. A semiconductor die is attached to a relatively thick metal heat spreader which in turn is attached to at least a portion of the copper foil. The resultant structure is a semiconductor package which has a thermal performance comparable to that of typical hybrid ceramic packages.
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Akzo America Inc.
Morris Louis A.
Tolin Gerald P.
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