System and method for making changes to printed wiring boards

Details System and method for making changes to printed wiring boards System and method for making changes to printed wiring boards

1983-09-30

1986-02-18

Wintercorn, Richard A.

Photocopying

Contact printing

Superimposed carriers

355132, G03B 2702

Patent

active

045710724

ABSTRACT:
A computer aided design (CAD) system is operative to generate an output containing only the additions and deletions to an existing master artwork. The CAD output is in turn applied to photoplotter equipment which produces a "delete" artwork containing line representations of only the etch/wires to be deleted from the original master artwork and an "add" artwork containing line representations of ony the etch/wires to be added to the same original master artwork. These two artworks are photographically combined with the original master artwork in a predetermined manner to produce a new PWB artwork which incorporates the added and deleted wire changes.

REFERENCES:
IBM Tech. Disclosure Bulletin, "Photographic Composite Generation", vol. 7, No. 7, Dec. 1964, pp. 628-629.

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