Method of forming fluorescent screen of cathode ray tube

Details Method of forming fluorescent screen of cathode ray tube Method of forming fluorescent screen of cathode ray tube

1996-06-18

1998-03-03

Bell, Janyce

Coating processes

Electrical product produced

Fluorescent or phosphorescent base coating

427 68, 427 73, 427165, 4271262, 427123, 4271263, 427226, 427230, 4273897, 427404, 4274072, 4274192, 427444, 427336, 427 831, B05D 512

Patent

active

057231702

ABSTRACT:
A method of forming a phosphor layer of a fluorescent screen of a CRT, having a good screen quality by properly managing the dissolution of a water glass and barium acetate occurring in a covering water step and improve the uniformity. A phosphor layer is formed on an inner surface of a panel portion of a glass bulb by a precipitation process and a lacquer intermediate film is formed on the phosphor layer in a state where the phosphor layer is moistened by covering water. An electrolyte remaining in the phosphor layer after the phosphor layer is moistened by the covering water has a conductivity of 6.0.+-.4.0 .mu.s/cm in 200 ml of pure water of 20.degree. C..+-.1.degree. C.

REFERENCES:
patent: 5208065 (1993-05-01), Osaka et al.
patent: 5334410 (1994-08-01), Beckerle et al.
patent: 5366759 (1994-11-01), Beckerle et al.
patent: 5435938 (1995-07-01), Bando et al.

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