3622742 is referenced by 24 patents and cites 3 patents.

Thin film integrated circuits are formed by coating insulative substrates with conductive film and mounting them on the periphery of a rotating drum. As the drum rotates, a switched laser machines the circuit pattern by vaporizing parts of the metal film of successive substrates. Light from another laser is directed through a mask on the drum circumference and controls modulation of the machining laser.

Title
Laser machining method and apparatus
Application Number
05/040,914
Publication Number
3622742
Application Date
May 27, 1970
Publication Date
November 23, 1971
Inventor
West John Wesley
Weick Walter Werner
Cohen Melvin Irwin
Assignee
Bell Telephone Laboratories Incorporated
IPC
B23k 09/00
B23K 26/08
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