EP0366090A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Cathode ray tube
Assignee: AGC Inc
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Filing: 1989-10-24
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Granted: —
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Expires: 2009-10-24
Abstract
Abstract A cathode ray tube has an insulating layer formed at at least a part of the outer surface of a neck tube. The insulating layer is a layer obtained by coating and baking a sol prepared by dispersing one or two or more metal alkoxides and metal salts in a hydrophilic oligomer state by adding water and an acid to a solution having one or two or more metal alkoxides and metal salts dissolved in an organic solvent such as an alcohol.
Inventors
- 👤 Takashi Numata
- 👤 Yusuke Kobayashi
- 👤 Yoshihito Katayama
- 👤 Junichi Iura
- 👤 Toshiyasu Kawaguchi
- 👤 Tsunehiko Sugawara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 13:32
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/87; H01J9/00; H01J9/20; C; C03; C03C; C03C17/00; C03C17/02; C03C17/04; C03C17/22; C03C17/23; C03C17/25; C03C8/00; C03C8/14; C03C8/16; H01J29/88; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/213; C03C2217/229; C03C2217/23; C03C2218/00; C03C2218/10; C03C2218/11; C03C2218/113; H01J2229/00; H01J2229/88; H01J2229/885
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
25 words
A cathode ray tube characterized in that an insulating layer is formed at at least a part of the outer surface of a neck tube.
Claim 2
Dependent Claim
25 words
A cathode ray tube characterized in that an insulating layer is formed at at least a part of the outer surface of a neck tube.
Claim 3
Dependent Claim
20 words
The cathode ray tube according to Claim 1, wherein said insulating layer is a layer formed by baking glass frit.
Claim 4
Dependent Claim
16 words
The cathode ray tube according to Claim 1, wherein said insulating layer is a silica layer.
Claim 5
Dependent Claim
69 words
The cathode ray tube according to Claim 1, wherein said insulating layer is a layer obtained by coating and baking a sol prepared by dispersing one or two or more metal alkoxides and metal salts in a hydrophilic oligomer state by adding water and an acid to a solution having one or two or more metal alkoxides and metal salts dissolved in an organic solvent such as an alcohol.
Claim 6
Dependent Claim
83 words
The cathode ray tube according to Claim 1, wherein said insulating layer is a layer obtained by coating and baking a liquid prepared by dispersing fine metal oxide particles having an OH radical at the surface in a sol containing one or two or more metal alkoxides and metal salts in a hydrophilic oligomer state by adding water and an acid to a solution having the metal alkoxides and one or two metal salts dissolved in an organic solvent such as an alcohol.
Claim 7
Dependent Claim
109 words
The cathode ray tube according to Claim 1, wherein said insulating layer is a layer obtained by coating and baking a liquid having fine metal oxide particles dispersed in a polysiloxane obtained by polymerizing a trifunctional alkoxide having an organic radical of the formula RSi (OR′)₃ (wherein R′ is a methyl radical or an ethyl radical and R is a methyl radical, an ethyl radical or a phenyl radical) or in a polysiloxane obtained by copolymerizing said trifunctional alkoxide with a bifunctional alkoxide of the formula R₂Si (OR′)₂ (wherein R′ is a methyl or an ethyl and R is a methyl radical, an ethyl radical or a phenyl radical).
Claim 8
Dependent Claim
51 words
The cathode ray tube according to Claim 1, wherein said insulating layer is formed at the outer surface of said neck tube to have a length in a range of 10 - 50 mm around an end of an inner conductive coating formed on the inner surface of said neck tube.
References Cited (Backward Citations)
No citation records indexed.
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