US3205155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating thin film resistive elements
Assignee: Motorola Solutions Inc
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Filing: 1961-10-19
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Granted: 1965-09-07
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Expires: 1981-10-19
Abstract
No abstract record available.
Inventors
- 👤 John W Van Natter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:42
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/22; H01C17/24; H01C17/2412; C; C03; C03C; C03C23/00; C23; C23G; C23G5/00; H01B; H01B1/00; H01C7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PROCESS FOR MAKING A DEVICE COMPRISING A PREDETERMINED ELECTRICAL CONDUCTING PATTERN IN A THIN FILM OF TIN OXIDE DEPOSITED ON A CERAMIC SUBSTRATE, INCLUDING THE STEPS OF MASKING THE TIN OXIDE OVER THOSE PORTIONS MAKING UP THE PREDETERMINED PATTERN, WITH THE REMAINDER OF THE THIN FILM BEING EXPOSED AT THE OUTSIDE SURFACE THEREOF, IMMERSING SAID CERAMIC SUBSTRATE WITH THE FILM THEREON IN A BATH COMPRISING AN AMALGAM OF MERCURY AND A REDUCING METAL SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METALS AND THE ALKALINE EARTH METALS TO REMOVE SAID REMAINDER PORTION OF THE THIN FILM, AND REMOVING THE MASK TO LEAVE EXPOSED THE TIN OXIDE IN THE PREDETERMINED PATTERN ON THE CERAMIC SUBSTRATE.
Claim 2
Dependent Claim
115 words
A PROCESS FOR MAKING A DEVICE COMPRISING A PREDETERMINED ELECTRICAL CONDUCTING PATTERN IN A THIN FILM OF TIN OXIDE DEPOSITED ON A CERAMIC SUBSTRATE, INCLUDING THE STEPS OF MASKING THE TIN OXIDE OVER THOSE PORTIONS MAKING UP THE PREDETERMINED PATTERN, WITH THE REMAINDER OF THE THIN FILM BEING EXPOSED AT THE OUTSIDE SURFACE THEREOF, IMMERSING SAID CERAMIC SUBSTRATE WITH THE FILM THEREON IN A BATH COMPRISING AN AMALGAM OF MERCURY AND A REDUCING METAL SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METALS AND THE ALKALINE EARTH METALS TO REMOVE SAID REMAINDER PORTION OF THE THIN FILM, AND REMOVING THE MASK TO LEAVE EXPOSED THE TIN OXIDE IN THE PREDETERMINED PATTERN ON THE CERAMIC SUBSTRATE.
References Cited (Backward Citations)
US1200025A
Cited
US1922975A
Cited
US2435889A
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US2823148A
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US2884313A
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US3095340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |