US3738877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor devices
Assignee: Motorola Solutions Inc
•
Filing: 1970-08-24
•
Granted: 1973-06-12
•
Expires: 1990-08-24
Abstract
Abstract VARIOUS DEVICES ARE DESCRIBED HEREIN UTILIZING ANISOTROPIC ETCHING AND DIELECTRIC ISOLATIONS AS MEANS FOR LIMITING AREAS OF EITHER CONDUCTIVITY TYPE SEMICONDUCTOR MATERIAL. SURFACE JUNCTIONS NORMALLY FOUND IN THE DIFFUSED SEMICONDUCTOR DEVICES OF THE PRIOR ART ARE ALSO ELIMINATED BY THE USE OF OVERLAP DIFFUSION TECHNIQUES. ANISOTROPIC ETCHING IS EMPLOYED IN CERTAIN OF THE DEVICES FOR ATTAINING BURIED PN JUNCTIONS.
Inventors
- 👤 U Davidsohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:52
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/01; H10D84/0112; H10D84/02; H10D84/03; H10D84/038; H10D84/60; H10D84/611; H10D84/613; H10D84/617; H10D86/00; H10D86/01; H10D99/00; H10P; H10P95/00; H10W; H10W10/00; H10W10/01; H10W10/011; H10W10/019; H10W10/10; Y; Y10; Y10S; Y10S148/00; Y10S148/036; Y10S148/051; Y10S148/085; Y10S148/139
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |