US3217215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field effect transistor
Assignee: Infineon Technologies Americas Corp
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Filing: 1963-07-05
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Granted: 1965-11-09
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Expires: 1983-07-05
Abstract
No abstract record available.
Inventors
- 👤 John M Gault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:15
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/80; H10D84/86; H10D99/00; H10P; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A FIELD EFFECT TRANSISTOR COMPRISING A BODY OF N TYPE CONDUCTIVITY MATERIAL HAVING A GROOVE EXTENDING INTO A SURFACE THEREOF, A FIRST AND SECOND P+ REGIONS EXTENDING INTO SAID BODY FROM SAID SURFACE, A PLANAR N+ REGION EXTENDING ACROSS THE OPPOSITE SURFACE OF SAID BODY, AND A P TYPE REGION SURROUNDING THE WALLS OF SAID GROOVE ADJACENT SAID N TYPE BODY; SAID P-TYPE REGION AT THE BOTTOM OF SAID GROOVE REACHING SAID N+ PLANAR REGIONS; SAID P TYPE REGION JOINING SAID FIRST AND SECOND P+ REGIONS AT THE ENDS OF SAID P TYPE REGION.
Claim 2
Dependent Claim
94 words
A FIELD EFFECT TRANSISTOR COMPRISING A BODY OF N TYPE CONDUCTIVITY MATERIAL HAVING A GROOVE EXTENDING INTO A SURFACE THEREOF, A FIRST AND SECOND P+ REGIONS EXTENDING INTO SAID BODY FROM SAID SURFACE, A PLANAR N+ REGION EXTENDING ACROSS THE OPPOSITE SURFACE OF SAID BODY, AND A P TYPE REGION SURROUNDING THE WALLS OF SAID GROOVE ADJACENT SAID N TYPE BODY; SAID P-TYPE REGION AT THE BOTTOM OF SAID GROOVE REACHING SAID N+ PLANAR REGIONS; SAID P TYPE REGION JOINING SAID FIRST AND SECOND P+ REGIONS AT THE ENDS OF SAID P TYPE REGION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |