US3312881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor with limited area basecollector junction
Assignee: International Business Machines Corp
•
Filing: 1963-11-08
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Granted: 1967-04-04
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Expires: 1983-11-08
Abstract
No abstract record available.
Inventors
- 👤 Hwa N Yu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:42
CPC Classifications
H; H10; H10D; H10D10/00; H10D10/40; H10D10/441; H10D99/00; H10P; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/05; Y10S148/145; Y10S257/00; Y10S257/913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A SEMICONDUCTOR DEVICE COMPRISING A CRYSTALLINE BODY HAVING A PLURALITY OF REGIONS DIFFERING IN CONDUCTIVITY TYPE AND COMPRISING A COLLECTOR REGION OF A FIRST CONDUCTIVITY TYPE CONSTITUTING THE BULK OF SAID BODY, A BASE REGION OF A SECOND CONDUCTIVITY TYPE EXTENDING FROM THE SURFACE OF SAID BODY AND DEFINING THEREWITHIN A JUNCTION OF LIMITED EXTENT, AN INTRINSIC REGION EXTENDING FROM THE EXTREMITY OF SAID JUNCTION TO SAID SURFACE DISPOSED BETWEEN SAID BASE AND COLLECTOR REGIONS AND AN EMITTER REGION FORMED AT SAID SURFACE IN SPACED ALIGNMENT WITH SAID JUNCTION OF LIMITED EXTENT.
Claim 2
Dependent Claim
92 words
A SEMICONDUCTOR DEVICE COMPRISING A CRYSTALLINE BODY HAVING A PLURALITY OF REGIONS DIFFERING IN CONDUCTIVITY TYPE AND COMPRISING A COLLECTOR REGION OF A FIRST CONDUCTIVITY TYPE CONSTITUTING THE BULK OF SAID BODY, A BASE REGION OF A SECOND CONDUCTIVITY TYPE EXTENDING FROM THE SURFACE OF SAID BODY AND DEFINING THEREWITHIN A JUNCTION OF LIMITED EXTENT, AN INTRINSIC REGION EXTENDING FROM THE EXTREMITY OF SAID JUNCTION TO SAID SURFACE DISPOSED BETWEEN SAID BASE AND COLLECTOR REGIONS AND AN EMITTER REGION FORMED AT SAID SURFACE IN SPACED ALIGNMENT WITH SAID JUNCTION OF LIMITED EXTENT.
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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) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |