US3087098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor
Assignee: Motorola Solutions Inc
•
Filing: 1954-10-05
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Granted: 1963-04-23
•
Expires: 1974-10-05
Abstract
No abstract record available.
Inventors
- 👤 William E Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:28
CPC Classifications
H; H10; H10D; H10D99/00; H10D10/00; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W72/00; H10W76/00; H10W76/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
IN A SEMCONDUCTOR DEVICE HAVING A SEMICONDUCTOR CRYSTAL WAFER OF A SELECTED CONDUCTIVITY TYPE WITH OPPOSITE FACES THE PLURAL ELECTRODE STRUCTURE ON SAID WAFER INCLUDING THE COMBINATION, A COLLECTOR ELECTRODE OF A SELECTED ALLOYING MATERIAL ALLOYED TO ONE FACE OF SAID WAFER IN A RECTIFYING CONNECTION, AN ANNULAR EMITTER ELECTRODE OF A SELECTED ALLOYING MATERIAL ALLOYED TO THE OPPOSITE FACE OF SAID WAFER IN A RECTIFYING CONNECTION AND HAVING AN ANNULAR-INNER-EDGE PORTION, SAID TWO NAMED ELECTRODES BEING POSITIONED OPPOSITE TO ONE ANOTHER SO THAT A LINE AT RIGHT ANGLES THROUGH SAID ANNULAR-INNER-EDGE PORTION AND SAID WAFER EXTENDS THROUGH SAID COLLECTOR ELECTRODE AT AN INTERNAL PORTION, SAID PLURAL ELECTRODE STRUCTURE FURTHER COMPRISING A FIRST BASE ELECTRODE IN OHMIC CONNECTION WITH SAID OPPOSITE FACE OF SAID WAFER AND WITHIN SAID ANNULAR-INNER-EDGE PORTION OF SAID EMITTER ELECTRODE, AND A SECOND BASE ELECTRODE IN OHMIC CONNECTION WITH SAID WAFER AND IN A POSITION OUTWARDLY OF SAID ANNULAR EMITTER ELECTRODE.
Claim 2
Dependent Claim
155 words
IN A SEMCONDUCTOR DEVICE HAVING A SEMICONDUCTOR CRYSTAL WAFER OF A SELECTED CONDUCTIVITY TYPE WITH OPPOSITE FACES THE PLURAL ELECTRODE STRUCTURE ON SAID WAFER INCLUDING THE COMBINATION, A COLLECTOR ELECTRODE OF A SELECTED ALLOYING MATERIAL ALLOYED TO ONE FACE OF SAID WAFER IN A RECTIFYING CONNECTION, AN ANNULAR EMITTER ELECTRODE OF A SELECTED ALLOYING MATERIAL ALLOYED TO THE OPPOSITE FACE OF SAID WAFER IN A RECTIFYING CONNECTION AND HAVING AN ANNULAR-INNER-EDGE PORTION, SAID TWO NAMED ELECTRODES BEING POSITIONED OPPOSITE TO ONE ANOTHER SO THAT A LINE AT RIGHT ANGLES THROUGH SAID ANNULAR-INNER-EDGE PORTION AND SAID WAFER EXTENDS THROUGH SAID COLLECTOR ELECTRODE AT AN INTERNAL PORTION, SAID PLURAL ELECTRODE STRUCTURE FURTHER COMPRISING A FIRST BASE ELECTRODE IN OHMIC CONNECTION WITH SAID OPPOSITE FACE OF SAID WAFER AND WITHIN SAID ANNULAR-INNER-EDGE PORTION OF SAID EMITTER ELECTRODE, AND A SECOND BASE ELECTRODE IN OHMIC CONNECTION WITH SAID WAFER AND IN A POSITION OUTWARDLY OF SAID ANNULAR EMITTER ELECTRODE.
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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) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |