US3984585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum evaporation plating method
Assignee: Fujifilm Business Innovation Corp
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Filing: 1975-01-16
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Granted: 1976-10-05
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Expires: 1995-01-16
Abstract
Abstract A method for vacuum-evaporating photosensitive material and the like including an infrared-radiating heater made of tungsten for example and covered with a protective covering made of quartz for example disposed adjacent a photosensitive material subject to fractional evaporation or distillation to inhibit or control the tendency thereof to fractionally evaporate.
Inventors
- 👤 Jun Onozaki
- 👤 Fukumatsu Sakaue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:09
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08207; C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/28
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
137 words
A method for vacuum-evaporating a photosensitive multi-element material having at least first and second elements where said first element evaporates less readily then said second element, said method comprising the steps of containing said photosensitive multi-element material; radiating infrared radiations from an infrared radiation source onto the upper surface of said material to evaporate the material; preventing evaporation of the material of the infrared radiation source into said multi-element material by interposing a protective cover between said infrared radiation source and said multi-element material so that said infrared radiation can reach said multi-element material but said material of the radiation source cannot reach the multi-element material nor can the multi-element material reach said infrared radiation source; and receiving the vapors of said multi-element material to form a photosensitive film deposit of said material on said receiving means.
Claim 2
Independent Claim
137 words
A method for vacuum-evaporating a photosensitive multi-element material having at least first and second elements where said first element evaporates less readily then said second element, said method comprising the steps of containing said photosensitive multi-element material; radiating infrared radiations from an infrared radiation source onto the upper surface of said material to evaporate the material; preventing evaporation of the material of the infrared radiation source into said multi-element material by interposing a protective cover between said infrared radiation source and said multi-element material so that said infrared radiation can reach said multi-element material but said material of the radiation source cannot reach the multi-element material nor can the multi-element material reach said infrared radiation source; and receiving the vapors of said multi-element material to form a photosensitive film deposit of said material on said receiving means.
Claim 3
Dependent Claim
18 words
A method as in claim 1 including additionally heating said multi-element material from beneath the upper surface thereof.
Claim 4
Dependent Claim
17 words
A method as in claim 1 where said multi-element material is a mixture of selenium and tellurium.
Claim 5
Dependent Claim
37 words
A method as in claim 3 where said mixture contains approximately 92% selenium by weight and 8% tellurium by weight, the percentage of tellurium near the surface of the deposited film being less than 25% by weight.
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) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |