US3645783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin film planar resistor
Assignee: INFRARED IND Inc
•
Filing: 1970-06-03
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Granted: 1972-02-29
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Expires: 1990-06-03
Abstract
Abstract A planar film circuit in which a metallic oxide planar film is on a dielectric substrate, said planar film having areas of insulation comprising said metallic oxide, and areas of conduction comprising reduced metal. The planar film surface is not altered by the presence of said insulating and conducting areas. The method for forming said metallic oxide planar film circuits provides depositing said metallic oxide by reactive sputtering of a metal under vacuum in the presence of oxygen, and selectively reducing areas of said metallic oxide with hydrogren and an energy source. The method is used to obtain planar film electrical circuits having resistor and capacitor elements.
Inventors
- 👤 Robert E Rupert
- 👤 Norman C Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:32
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/006; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
36 words
A planar film circuit as in claim 1 wherein said area of insulation is platinum oxide, said incompletely reduced area is platinum oxide partially reduced to platinum, and wherein said area of conductance is reduced platinum.
References Cited (Backward Citations)
US860997A
Cited
US3472688A
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US3469227A
Cited
US3411122A
Cited
US3523039A
Cited
US3514414A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |