US3284878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming thin film resistors
Assignee: Corning Glass Works
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Filing: 1963-12-09
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Granted: 1966-11-15
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Expires: 1983-12-09
Abstract
No abstract record available.
Inventors
- 👤 Gary R Best
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:43
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/22; H01C17/24; H01C17/245; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099; Y10T83/00; Y10T83/364
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN THE PROCESS OF ADJUSTING THE RESISTANCE OF A THIN FILM RESISTOR COMPRISING THE STEPS OF APPLYING AN ELECTROCONDUCTIVE FILM HAVING A RESISTANCE LESS THAN A PREDETERMINED DESIRED VALUE ON A DIELECTRIC SUBSTRATE, AND THEREAFTER REMOVING A PORTION OF SAID FILM TO INCREASE THE LENGTH TO WIDTH RATIO THEREOF, THE IMPROVEMENT COMPRISING APPLYING A RESIST MATERIAL OVER SAID FILM, SIMULTANEOUSLY REMOVING A PORTION OF BOTH SAID FILM AND SAID RESIST MATERIAL BY SANDBLASTING THEREBY INCREASING THE RESISTANCE OF SAID FILM TO SAID VALUE, AND THEREAFTER REMOVING THE BALANCE OF SAID RESIST MATERIAL.
Claim 2
Dependent Claim
92 words
IN THE PROCESS OF ADJUSTING THE RESISTANCE OF A THIN FILM RESISTOR COMPRISING THE STEPS OF APPLYING AN ELECTROCONDUCTIVE FILM HAVING A RESISTANCE LESS THAN A PREDETERMINED DESIRED VALUE ON A DIELECTRIC SUBSTRATE, AND THEREAFTER REMOVING A PORTION OF SAID FILM TO INCREASE THE LENGTH TO WIDTH RATIO THEREOF, THE IMPROVEMENT COMPRISING APPLYING A RESIST MATERIAL OVER SAID FILM, SIMULTANEOUSLY REMOVING A PORTION OF BOTH SAID FILM AND SAID RESIST MATERIAL BY SANDBLASTING THEREBY INCREASING THE RESISTANCE OF SAID FILM TO SAID VALUE, AND THEREAFTER REMOVING THE BALANCE OF SAID RESIST MATERIAL.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |