Patent US5340673A successfully refreshed from Google Patents.
US5340673A
Expired / Lapsed
US
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Method of manufacturing a phosphor screen of a cathode ray tube
Assignee: Sony Corp
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Filing: 1993-03-22
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Granted: 1994-08-23
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Expires: 2013-03-22
Abstract
Abstract A method of forming a phosphor screen in which a color filter layer is formed between a phosphor layer and an inner surface of a panel having a slurry in which a fine particle pigment and transparent particles are dispersed into a photosensitive liquid coated on the inner surface of the panel. Then, the color filter layer is formed by exposure and development. When the color filter layer that constitutes one portion of a phosphor screen of a color cathode ray tube is formed in this manner, an adhesive force with which the color filter layer is bonded onto the panel can be increased and a transmittance of the color filter layer can be improved.
Inventors
- 👤 Norihiro Tateyama
- 👤 Katsutoshi Ohno
- 👤 Tsuneo Kusunoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:45
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/30; H01J29/32; H01J29/327; H01J29/185; H01J29/28; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2271; H01J9/2278
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
A method of manufacturing a phosphor screen of a cathode ray tube comprising the steps of: forming a uniform coating layer of a slurry comprising pigment particles, a photo resist, transparent particles and a dispersant on an inner surface of a panel of said cathode ray tube; exposing said coating layer using a photo mask having a predetermined pattern; developing said exposed coating layer to form a color filter layer including said pigment particles and said transparent particles; and forming a color phosphor layer of phosphor particles on top of said color filter layer.
Claim 2
Independent Claim
94 words
A method of manufacturing a phosphor screen of a cathode ray tube comprising the steps of: forming a uniform coating layer of a slurry comprising pigment particles, a photo resist, transparent particles and a dispersant on an inner surface of a panel of said cathode ray tube; exposing said coating layer using a photo mask having a predetermined pattern; developing said exposed coating layer to form a color filter layer including said pigment particles and said transparent particles; and forming a color phosphor layer of phosphor particles on top of said color filter layer.
Claim 3
Dependent Claim
26 words
The method according to claim 1, wherein said transparent particles are particles selected from silica micro-bead, baked alumina, quartz bead, acryl-based resin particle, or polyethylene-based resin.
Claim 4
Dependent Claim
69 words
The method according to claim 1, wherein said transparent particle is selected as a transparent particle which is decomposed by heat of higher than a predetermined temperature and said transparent particle of 0.1 weight % to 70 weight % is contained in the total amount of a composition of said slurry and said transparent particle of 10 weight % to 100 weight % is contained in fine particle pigment.
References Cited (Backward Citations)
US5073463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-22 | 1998-02-21 | 1998-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-22 | 2002-02-21 | 2002-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-22 | 2006-02-21 | 2006-08-23 | $7700.00 | Window Closed / Lapsed |