Method of making photo stencils for cathode ray tube screen depo

Details Method of making photo stencils for cathode ray tube screen depo Method of making photo stencils for cathode ray tube screen depo

1992-06-30

1994-08-16

Rosasco, Steve

Radiation imagery chemistry: process, composition, or product th

Producing cathode-ray tube or element thereof

430 5, 430 24, 430 25, 445 52, 445 66, G03C 500

Patent

active

053386299

ABSTRACT:
A method is disclosed for manufacturing photostencils used in screening the faceplates of color cathode ray tubes. The photostencils are produced as progeny from a parent stencil photo plotted according to the dictates of a proximity photoprinting process in conjunction with the electron optical characteristics of the operational CRT. A rectangular beam is used for radiating light through the pattern of features on the parent stencil onto the photoresist of the progeny stencil. As a result, the features of the progeny stencil differ in size or shape or both, from those of the parent stencil.

REFERENCES:
patent: 3973964 (1976-08-01), Lange
patent: 4248947 (1981-02-01), Oikawa
patent: 4475797 (1984-10-01), Park
patent: 5158491 (1992-10-01), Fendley et al.

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