Patent US1939130A successfully refreshed from Google Patents.
US2916408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabrication of junction transistors
Assignee: Raytheon Co
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Filing: 1956-03-29
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Granted: 1959-12-08
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Expires: 1976-03-29
Abstract
No abstract record available.
Inventors
- 👤 Freedman George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:48
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/60; H10D84/645; C; C30; C30B; C30B31/00; C30B31/04; H10D99/00; H10P; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
THE METHOD OF MAKING A SEMICONDUCTIVE DEVICE, SAID METHOD COMPRISING FIRST PROVIDING A SEMICONDUCTIVE BODY WITH TWO REGIONS OF DIFFERENT ELECTRICAL CONDUCTIVITY-TYPE MATERIAL, THE INTERFACE BETWEEN SAID TWO REGIONS CONSTITUTING A FIRST P-N JUNCTION, PLACING A FIRST ELECTRODE IN CONTACT WITH ONE OF SAID REGIONS, SAID FIRST ELECTRODE CONTAINING AN IMPURITY MATERIAL OPPOSITE TO THAT WHICH EXISTS IN THE PORTION OF SAID BODY WITH WHICH IT IS IN CONTACT, PASSING AN ELECTRIC CURRENT THROUGH SAID FIRST ELECTRODE AND THROUGH A SECOND ELECTRODE POSITIONED ON THE SAME SIDE OF SAID FIRST JUNCTION AS SAID FIRST ELECTRODE TO CONVERT A PORTION OF SAID BODY UNDER SAID FIRST ELECTRODE TO THE SAME ELECTRICAL CONDUCTIVITY-TYPE MATERIAL AS THE IMPURITY IN SAID FIRST ELECTRODE WHEREBY A SECOND P-N JUNCTION IS CREATED, AND INTERMITTENTLY AND SELECTIVELY PASSING PULSES OF ADDITIONAL CURRENT THROUGH SAID ELECTRODES TO CAUSE SAID SECOND P-N JUNCTION TO BE MOVED PROGRESSIVELY CLOSER TO SAID FIRST P-N JUNCTION WHILE MAINTAINING THE PHYSICAL POSITION OF SAID FIRST P-N JUNCTION SUBSTANTIALLY CONSTANT IN SAID BODY.
Claim 2
Independent Claim
169 words
THE METHOD OF MAKING A SEMICONDUCTIVE DEVICE, SAID METHOD COMPRISING FIRST PROVIDING A SEMICONDUCTIVE BODY WITH TWO REGIONS OF DIFFERENT ELECTRICAL CONDUCTIVITY-TYPE MATERIAL, THE INTERFACE BETWEEN SAID TWO REGIONS CONSTITUTING A FIRST P-N JUNCTION, PLACING A FIRST ELECTRODE IN CONTACT WITH ONE OF SAID REGIONS, SAID FIRST ELECTRODE CONTAINING AN IMPURITY MATERIAL OPPOSITE TO THAT WHICH EXISTS IN THE PORTION OF SAID BODY WITH WHICH IT IS IN CONTACT, PASSING AN ELECTRIC CURRENT THROUGH SAID FIRST ELECTRODE AND THROUGH A SECOND ELECTRODE POSITIONED ON THE SAME SIDE OF SAID FIRST JUNCTION AS SAID FIRST ELECTRODE TO CONVERT A PORTION OF SAID BODY UNDER SAID FIRST ELECTRODE TO THE SAME ELECTRICAL CONDUCTIVITY-TYPE MATERIAL AS THE IMPURITY IN SAID FIRST ELECTRODE WHEREBY A SECOND P-N JUNCTION IS CREATED, AND INTERMITTENTLY AND SELECTIVELY PASSING PULSES OF ADDITIONAL CURRENT THROUGH SAID ELECTRODES TO CAUSE SAID SECOND P-N JUNCTION TO BE MOVED PROGRESSIVELY CLOSER TO SAID FIRST P-N JUNCTION WHILE MAINTAINING THE PHYSICAL POSITION OF SAID FIRST P-N JUNCTION SUBSTANTIALLY CONSTANT IN SAID BODY.
References Cited (Backward Citations)
US2697269A
Cited
FR1038658A
Cited
US2654059A
Cited
US2757323A
Cited
GB738216A
Cited
US2793332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |