04987100 is referenced by 76 patents and cites 23 patents.

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 to 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.

Title
Flexible carrier for an electronic device
Application Number
198901
Publication Number
4987100
Application Date
October 30, 1989
Publication Date
January 22, 1991
Inventor
Theron L Ellis
Vestal
NY, US
Donald G McBride
Binghamton
NY, US
Agent
Douglas M Clarkson
Assignee
International Business Machines Corporation
NY, US
IPC
H01L 21/60
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