US3689357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass-polysilicon dielectric isolation
Assignee: Motors Liquidation Co
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Filing: 1970-12-10
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Granted: 1972-09-05
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Expires: 1990-12-10
Abstract
Abstract A COMPOSITE SUBSTRATE AND METHOD FOR MAKING DIELECTRICALLY ISOLATED DIFFUSED SEMICONDUCTOR DEVICES IS DISCLOSED. ISLANDS OF MONOCRYSTALLINE SILICON ARE FORMED IN ONE FACE OF THE SUBSTRATE. THE ISLANDS ARE NESTED IN A THIN POLYCRYSTALLINE SILICON LAYER WHICH IS BONDED TO A LAPPED MONOCRYSTALLINE SILICON WAFER BY AN INTERJACENT LAYER OF GLASS. THE GLASS HAS A HIGH SOFTENING POINT TEMERPATURE AND THERMAL EXPANSION PROPERTIES SIMILAR TO MONOCRYSTALLINE SILCON. D R A W I N G
Inventors
- 👤 Larry Lee Jordan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:45
CPC Classifications
H; H10; H10W; H10W10/00; H10W10/01; H10W10/011; H10W10/019; H10W10/10; Y; Y10; Y10S; Y10S148/00; Y10S148/043; Y10S148/049; Y10S148/085; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24521; Y10T428/24537; Y10T428/24802; Y10T428/24926; Y10T428/26; Y10T428/263; Y10T428/264
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |