Image alignment indicators

Details Image alignment indicators Image alignment indicators

1988-12-16

1990-04-10

Shoap, Allan N.

Geometrical instruments

Gauge

Collocating

29830, G01B 524, H05K 336

Patent

active

049148290

ABSTRACT:
The addition of registration marks as an aid in projecting a precision location of a screened artwork or master pattern as used in printing of thick film circuits on a ceramic substrate base is taught by the present invention. The marks are located in a number of locations on the artwork that correspond to a location which will be determined as the edge of the substrate base when the substrate base is printed in proper registration on the artwork to which the registration marks have been added.

REFERENCES:
patent: 1151461 (1915-08-01), Hatt
patent: 2795851 (1957-06-01), Sampson
patent: 3516156 (1970-06-01), Steranko
patent: 3889383 (1975-06-01), Jahn
patent: 3913219 (1975-10-01), Lichtblau
patent: 4521262 (1985-06-01), Pellegrino
patent: 4628406 (1986-12-01), Smith et al.
patent: 4702785 (1987-10-01), Burger
patent: 4739448 (1988-04-01), Rowe et al.
patent: 4827626 (1989-05-01), Wieland
Goodman, H. A. et al., "Integrated Packaging for Transparent Elastic Diaphragm Switch", IBM Technical Disclosure Bulletin, vol. 15, No. 2, p. 544 (Jul. 1972).

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