US3748187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-registered doped layer for preventing field inversion in mis circuits
Assignee: Raytheon Co
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Filing: 1971-08-03
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Granted: 1973-07-24
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Expires: 1991-08-03
Abstract
Abstract FIELD INVERSION OF "CHANNELING" BETWEEN ADJACENT MIS DEVICES IN A COMMON SUBSTRATE IS INHIBITED BY FORMING A RECESSED INSULATING REGION BETWEEN THE DEVICES AND BY FORMING A HEAVILY DOPED CHANNEL-STOPPING LAYER UNDER THE INSULATING LAYER. THE INSULATING LAYER EXTENDS INTO THE SUBSTRATE TO A GREATER DEPTH THAN DO THE DIFFUSIONS OF THE ADJACENT MIS DEVICES AND IT EXTENDS LATERALLY BEYOND THE EDGES OF THE CHANNEL-STOPPING LAYER UNDER IT. AS A RESULT THE CHANNEL-STOPPING LAYER IS SAFELY SPACED FROM BOTH OF THE ADJACENT DIFFUSIONS.
Inventors
- 👤 K Aubuchon
- 👤 H Dill
- 👤 R Bower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:57
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/10; H10D62/102; H10D62/112; H10P; H10P95/00; H10W; H10W10/00; H10W10/01; H10W10/011; H10W10/012; H10W10/0121; H10W10/0125; H10W10/0126; H10W10/10; H10W10/13; Y; Y10; Y10S; Y10S148/00; Y10S148/053; Y10S148/085; Y10S148/103; Y10S148/105; Y10S148/117; Y10S148/147; Y10S438/00; Y10S438/942; Y10S438/944
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |