Projection printing system with an improved mask configuration

Details Projection printing system with an improved mask configuration Projection printing system with an improved mask configuration

1976-08-12

1977-12-20

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

355125, G03B 2700, G03B 2728

Patent

active

040638120

ABSTRACT:
In a projection printing system the pattern mask, whose image is projected onto a light sensitive layer, is encased in a glass sandwich so that any dirt particles on the surfaces of the sandwich are out of focus and are not printed in the light sensitive layer.

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I.B.M. Technical Disclosure Bulletin, vol. 18, No. 10, 3/1976, pp. 3360-3364, Package Mask for Photolithography G. VIA.
I.B.M. Technical Disclosure Bulletin, vol. 8, No. 11, 4/1966, Schaible, p. 1575.
I.B.M. Technical Disclosure Bulletin, Sybalsky et al., vol. 11, No. 5, 10/1968, p. 567.
I.B.M. Technical Disclosure Bulletin, Sybalsky, vol. 14, No. 1, 6/1971, p. 249.

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