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US4016307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of selectively metallizing the display screen of a cathode-ray tube and cathode-ray tube manufactured by said method
Assignee: US Philips Corp
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Filing: 1976-01-14
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Granted: 1977-04-05
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Expires: 1996-01-14
Abstract
Abstract A method of selectively metallizing only the phosphor regions of a pattern of phosphor regions and uncovered regions on a window portion of a cathode-ray tube. An electroless plating bath is used. A photosensitive layer which is exposed via the window portion prevents the phosphor grains from being enveloped by a metal layer.
Inventors
- 👤 Maria Antonius Alphonsus Andreas Collaris
- 👤 Antonius Wilhelmus Cornelis VAN Kemenade
- 👤 Henricus Antonius Debruijn
- 👤 Mathieu Willem Maria Snijders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:32
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/28; H01J9/00; H01J9/20; H01J9/22; H01J9/221; H01J9/227; H01J9/2278
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
A method of selectively metallizing only the phosphor regions of a pattern of phosphor regions and uncovered regions on a window portion of a cathode-ray tube, characterized in that: a. a photosensitive layer which becomes insoluble in a solvent as a result of exposure to actinic radiation is provided over said pattern, b. the photosensitive layer is exposed to actinic radiation via the window portion, c. the photosensitive layer is developed by removing the parts of the layer which have remained soluble from the phosphor regions by means of the solvent, d. the pattern is treated with a solution containing ions of a metal selected from the group consisting of Pd, Pt, Au, Ag and Cu, e. the pattern is metallized with a metal selected from the group consisting of Ni, Ag, Co, Sn, Cu and Au in an electroless plating bath, f. the remaining parts of the photosensitive layer are removed by means of a thermal treatment.
Claim 2
Independent Claim
158 words
A method of selectively metallizing only the phosphor regions of a pattern of phosphor regions and uncovered regions on a window portion of a cathode-ray tube, characterized in that: a. a photosensitive layer which becomes insoluble in a solvent as a result of exposure to actinic radiation is provided over said pattern, b. the photosensitive layer is exposed to actinic radiation via the window portion, c. the photosensitive layer is developed by removing the parts of the layer which have remained soluble from the phosphor regions by means of the solvent, d. the pattern is treated with a solution containing ions of a metal selected from the group consisting of Pd, Pt, Au, Ag and Cu, e. the pattern is metallized with a metal selected from the group consisting of Ni, Ag, Co, Sn, Cu and Au in an electroless plating bath, f. the remaining parts of the photosensitive layer are removed by means of a thermal treatment.
Claim 3
Independent Claim
25 words
A method as claimed in clain 1, characterized in that the metal of step d) is Pd and the metal of step e) is Ni.
Claim 4
Dependent Claim
17 words
A method as claimed in claim 1, characterized in that the photosensitive layer is water-repellent and non-photoconductive.
Claim 5
Dependent Claim
31 words
A method as claimed in claim 1, characterized in that in step d) the pattern is exposed to actinic radiation while the pattern is still in contact with the said solution.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |