Method of manufacture of a color television tube having low scre

Details Method of manufacture of a color television tube having low scre Method of manufacture of a color television tube having low scre

1984-06-21

1985-08-06

Hoffman, James R.

Radiation imagery chemistry: process, composition, or product th

Producing cathode-ray tube or element thereof

With light-absorbing matrix on faceplate

427 541, G03C 500

Patent

active

045336105

ABSTRACT:
In order to deposit an antireflection layer between the phosphor strips of the screen of a color television tube and on the face-plate flange, a photosensitive substance is applied on the internal face of the face-plate and is then exposed to radiation-hardening at the phosphor-strip locations, whereupon the non-hardened portions are removed. The flange and face-plate are then coated with the antireflection layer, H.sub.2 O.sub.2 is deposited in order to destroy the hardened strips which are finally removed together with their antireflection coating. Deionized water, for ensuring that the film of hardened photosensitive material which has formed on the flange is made uniform, is spray-deposited on the flange prior to deposition of photosensitive substance. After deposition of the antireflection layer, deionized water is also sprayed onto this layer prior to application of the oxygenated water. The destructive activity of the oxygenated water on the film is thus reduced.

REFERENCES:
patent: 3788846 (1974-01-01), Mayaud et al.
patent: 3841876 (1974-10-01), Takemoto et al.
patent: 3998638 (1976-12-01), Griswold et al.
patent: 4234669 (1980-11-01), Pearlman
patent: 4263384 (1981-04-01), Tumita et al.
patent: 4369241 (1983-01-01), Odaka et al.

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