Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1988-05-26
1990-06-26
Tolin, Gerald P.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
361400, H05K 102
Patent
active
049377078
ABSTRACT:
The disclosure describes a form of packaging for an electronic device and a method of achieving it in order to overcome the problem of damage because of cycles in environmental temperature.
A thin, flexible foil functioning as a carrier of electrically conductive material selected from the group including Invar, copper-Invar-copper and Kovar is coated with a preselected polyimide, on which is formed a thin metallized coating of chromium, in the order of 200 Angstroms, and copper, in the order of 80,000 Angstroms.
A predetermined electrical circuit is formed out of this metallized coating by a photolithographic process and is connected electrically to the flexible metal foil by vias through the polyimide coating. At least one electronic device is bonded to the electrical circuit at a predetermined location to operate functionally with the circuit, and both the device and the circuit are connected electrically by the vias to the thin, metal carrier which functions as a power plane for the package.
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Ellis Theron L.
McBride Donald G.
Clarkson Douglas M.
International Business Machines - Corporation
Tolin Gerald P.
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