US3928160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colour pickup tubes and method of manufacturing the same
Assignee: Hitachi Ltd
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Filing: 1974-09-05
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Granted: 1975-12-23
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Expires: 1994-09-05
Abstract
Abstract In a colour pickup tube of the class comprising a substrate, an optical colour analyzing filter formed on the substrate, a layer of transparent inorganic substance formed on the filter, and a photoelectric converting element formed on the layer of transparent inorganic substance, the last mentioned layer includes two successive layers of different degree of oxygen deficiency.
Inventors
- 👤 Saburo Nobutoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:35
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/89
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
126 words
IN A METHOD MANUFACTURING A COLOUR PICKUP TUBE OF THE CLASS WHEREIN AN OPTICAL COLOUR ANALYZING FILTER IS FORMED ON A SUBSTRATE, A LAYER OF TRANSPARENT ING ORGANIC SUBSTANCE IS FORMED ON SAID OPTICAL COLOUR ANALYZING FILTER, AND THEN A PHOTOELECTRIC CONVETING ELEMENT IS FORMED BY SUCCESSIVELY APPLYING A TRANSPARENT ELECTROCONDUCTIVE FILM AND A PHOTOCONDUCTIVE FILM UPON SAID LAYER OF TRANSPARENT INORGANIC SUBSTANCE, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF SPUTTERING A FIRST LAYER OF SAID TRANSPARENT INORGANIC SUBSTANCE UPON SAID FILTER IN A FIRST MIXED ATMOSPHERE OF AN INERT GAS AND OXYGEN, AND THEN SPUTTERING A SECOND LAYER OF SAID TRANSPARENT INORGANC SUBSTANCE UPON SAID FIRST LAYER IN A MIXED ATMOSPHERE CONTANING INERT GAS AND A SMALLER QUANTITY OF OXYGEN THAN SAID FIRST MIXED ATMOSPHERE.
Claim 2
Dependent Claim
126 words
IN A METHOD MANUFACTURING A COLOUR PICKUP TUBE OF THE CLASS WHEREIN AN OPTICAL COLOUR ANALYZING FILTER IS FORMED ON A SUBSTRATE, A LAYER OF TRANSPARENT ING ORGANIC SUBSTANCE IS FORMED ON SAID OPTICAL COLOUR ANALYZING FILTER, AND THEN A PHOTOELECTRIC CONVETING ELEMENT IS FORMED BY SUCCESSIVELY APPLYING A TRANSPARENT ELECTROCONDUCTIVE FILM AND A PHOTOCONDUCTIVE FILM UPON SAID LAYER OF TRANSPARENT INORGANIC SUBSTANCE, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF SPUTTERING A FIRST LAYER OF SAID TRANSPARENT INORGANIC SUBSTANCE UPON SAID FILTER IN A FIRST MIXED ATMOSPHERE OF AN INERT GAS AND OXYGEN, AND THEN SPUTTERING A SECOND LAYER OF SAID TRANSPARENT INORGANC SUBSTANCE UPON SAID FIRST LAYER IN A MIXED ATMOSPHERE CONTANING INERT GAS AND A SMALLER QUANTITY OF OXYGEN THAN SAID FIRST MIXED ATMOSPHERE.
Claim 3
Dependent Claim
19 words
The method according to claim 1 wherein said first layer is formed to have larger thickness than said filter.
Claim 4
Dependent Claim
27 words
The method according to claim 1 wherein said first layer is formed at a lower speed sputtering then said second layer is formed by high speed sputtering.
Claim 5
Dependent Claim
25 words
The method according to claim 1 wherein after mechanically smoothing the surface of said first layer, said second layer is formed on the smoothed surface.
Claim 6
Dependent Claim
38 words
The method according to claim 1 said first layer of said transparent inorganic substance is formed in the mixed atmosphere of an inert gas and oxygen wherein the fractional pressure of oxygen is more than 10 5 torr.
Claim 7
Dependent Claim
31 words
The method according to claim 1 said second layer of said transparent inorganic substance is formed under the atmosphere wherein the fractional pressure of oxygen is less than 10 7 torr.
Claim 8
Dependent Claim
117 words
In a method of manufacturing a colour pickup tube of the class wherein an optical colour analyzing filter is formed on a substrate, a layer of transparent inorganic substance is formed on said optical colour analyzing filter, and then a photoelectric coverting element is formed by successively applying a transparent electroconductive film and a photoconductive film upon said layer of transparent inorganic substance, the improvement where said layer of transparent inorganic substance is sputtered upon said filter in a mixed atmosphere of an inert gas and oxygen, and the oxygen content of said mixed atmosphere is gradually reduced thereby gradually varying the degree of oxygen deficiency of said layer from said filter toward said photoelectric converting element.
Claim 9
Dependent Claim
117 words
In a method of manufacturing a colour pickup tube of the class wherein an optical colour analyzing filter is formed on a substrate, a layer of transparent inorganic substance is formed on said optical colour analyzing filter, and then a photoelectric coverting element is formed by successively applying a transparent electroconductive film and a photoconductive film upon said layer of transparent inorganic substance, the improvement where said layer of transparent inorganic substance is sputtered upon said filter in a mixed atmosphere of an inert gas and oxygen, and the oxygen content of said mixed atmosphere is gradually reduced thereby gradually varying the degree of oxygen deficiency of said layer from said filter toward said photoelectric converting element.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |