US2874083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor construction
Assignee: RCA Corp
•
Filing: 1954-06-16
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Granted: 1959-02-17
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Expires: 1974-06-16
Abstract
No abstract record available.
Inventors
- 👤 Kenneth F Stripp
- 👤 Arnold R Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:01
CPC Classifications
H; H10; H10D; H10D99/00; H10D10/00; H10P; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A TRANSISTOR DEVICE COMPRISING A CRYSTALLINE SEMICONDUCTIVE BASE WAFER, AN EMITTER ELECTRODE DISPOSED UPON ONE SURFACE OF SAID WAFER AND FORMING A FIRST RECTIFYING BARRIER IN SAID WAFER ADHACENT TO SAID SURFACE, AND A COLLECTOR ELECTRODE DISPOSED UPON A SECOND SURFACE OF SAID WAFER OPPOSITE SAID ONE SURFACE AND FORMING A SECOND RECTIFYING BARRIER IN SAID WAFER ADJACENT TO SAID SECOND SURFACE, SAID SECOND BARRIER BEING OF GREATER AREA THAN SAID FIRST BARRIER, THE RATIO OF THE MAXIMUM DEPTH OF PENETRATION OF SAID SECOND BARRIER BENEATH THE PLANE OF SAID SECOND SURFACE TO THE MAXIMUM DEPTH OF PENETRATION OF SAID FIRST BARRIER BENEATH THE PLANE OF SAID FIRST SURFACE BEING GREATER THAN THE RATIO OF THE RESPECTIVE AREAS OF SAID TWO BARRIERS.
Claim 2
Dependent Claim
122 words
A TRANSISTOR DEVICE COMPRISING A CRYSTALLINE SEMICONDUCTIVE BASE WAFER, AN EMITTER ELECTRODE DISPOSED UPON ONE SURFACE OF SAID WAFER AND FORMING A FIRST RECTIFYING BARRIER IN SAID WAFER ADHACENT TO SAID SURFACE, AND A COLLECTOR ELECTRODE DISPOSED UPON A SECOND SURFACE OF SAID WAFER OPPOSITE SAID ONE SURFACE AND FORMING A SECOND RECTIFYING BARRIER IN SAID WAFER ADJACENT TO SAID SECOND SURFACE, SAID SECOND BARRIER BEING OF GREATER AREA THAN SAID FIRST BARRIER, THE RATIO OF THE MAXIMUM DEPTH OF PENETRATION OF SAID SECOND BARRIER BENEATH THE PLANE OF SAID SECOND SURFACE TO THE MAXIMUM DEPTH OF PENETRATION OF SAID FIRST BARRIER BENEATH THE PLANE OF SAID FIRST SURFACE BEING GREATER THAN THE RATIO OF THE RESPECTIVE AREAS OF SAID TWO BARRIERS.
References Cited (Backward Citations)
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Cited
US2750542A
Cited
US2748325A
Cited
US2697052A
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US2725505A
Cited
US2743693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |