US3432731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Planar high voltage four layer structures
Assignee: Fairchild Semiconductor Corp
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Filing: 1966-10-31
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Granted: 1969-03-11
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Expires: 1986-10-31
Abstract
No abstract record available.
Inventors
- 👤 Ronald J Whittier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:02
CPC Classifications
H; H10; H10D; H10D18/00; H10D18/251; H10D99/00; H10W; H10W74/00; H10W74/40; H10W74/43
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A MULTILAYERED SEMICONDUCTOR DEVICE HAVING IMPROVED STABILITY AND HIGH BREAKDOWN VOLTAGE COMPRISING: A FIRST REGION OF A FIRST CONDUCTIVITY TYPE HAVING A SURFACE; A SECOND REGION OF OPPOSITE CONDUCTIVITY TYPE DISPOSED WITHIN SAID FIRST REGION AND FORMING A FIRST P-N JUNCTION THEREWITH, SAID JUNCTION HAVING AN EDGE AT SAID SURFACE; A THIRD REGION OF SAID FIRST CONDUCTIVITY TYPE DISPOSED WITHIN SAID SECOND REGION, SAID SECOND AND THIRD REGIONS FORMING A SECOND P-N JUNCTION HAVING AN EDGE AT SAID SURFACE; A FOURTH REGION OF SAID OPPOSITE CONDUCTIVITY TYPE DISPOSED WITHIN SAID THIRD REGION FORMING A THIRD P-N JUNCTION, SAID JUNCTION HAVING AN EDGE AT SAID SURFACE; A LAYER OF INSULATING, PROTECTIVE MATERIAL OVERLYING AT LEAST A PORTION OF SAID SURFACE INCLUDING SAID EDGES OF SAID FIRST, SECOND, AND THIRD JUNCTIONS AND FORMED TO EXPOSE A PORTION OF SAID SURFACE OVER SAID FIRST AND FOURTH REGIONS;
Claim 2
Dependent Claim
144 words
A MULTILAYERED SEMICONDUCTOR DEVICE HAVING IMPROVED STABILITY AND HIGH BREAKDOWN VOLTAGE COMPRISING: A FIRST REGION OF A FIRST CONDUCTIVITY TYPE HAVING A SURFACE; A SECOND REGION OF OPPOSITE CONDUCTIVITY TYPE DISPOSED WITHIN SAID FIRST REGION AND FORMING A FIRST P-N JUNCTION THEREWITH, SAID JUNCTION HAVING AN EDGE AT SAID SURFACE; A THIRD REGION OF SAID FIRST CONDUCTIVITY TYPE DISPOSED WITHIN SAID SECOND REGION, SAID SECOND AND THIRD REGIONS FORMING A SECOND P-N JUNCTION HAVING AN EDGE AT SAID SURFACE; A FOURTH REGION OF SAID OPPOSITE CONDUCTIVITY TYPE DISPOSED WITHIN SAID THIRD REGION FORMING A THIRD P-N JUNCTION, SAID JUNCTION HAVING AN EDGE AT SAID SURFACE; A LAYER OF INSULATING, PROTECTIVE MATERIAL OVERLYING AT LEAST A PORTION OF SAID SURFACE INCLUDING SAID EDGES OF SAID FIRST, SECOND, AND THIRD JUNCTIONS AND FORMED TO EXPOSE A PORTION OF SAID SURFACE OVER SAID FIRST AND FOURTH REGIONS;
References Cited (Backward Citations)
US3204160A
Cited
US3302076A
Cited
FR1400150A
Cited
NL6413894A
Cited
US3303059A
Cited
US3391287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |