Method of manufacturing shadow mask

Details Method of manufacturing shadow mask Method of manufacturing shadow mask

1992-10-23

1994-07-05

Rosasco, Steve

Radiation imagery chemistry: process, composition, or product th

Producing cathode-ray tube or element thereof

430 28, 156644, G03C 500

Patent

active

053266633

ABSTRACT:
According to this invention, there is provided an improved method of manufacturing a shadow mask obtained by independently etching both the surfaces of a metal substrate. After one surface is etched to form a first opening, an etching resistive agent composition containing an acrylic resin, casein, and a leveling agent is applied to the obtained opening to form an etching resistive layer. Subsequently, the other surface is etched to form a second opening in the other surface, and then the etching resistive layer is removed to cause the first and second openings to communicate with each other.

REFERENCES:
patent: 4689114 (1987-08-01), Ohtake et al.

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