US3049451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple zone semiconductor device and method of making the same
Assignee: Tung Sol Electric Inc
•
Filing: 1959-09-02
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Granted: 1962-08-14
•
Expires: 1979-09-02
Abstract
No abstract record available.
Inventors
- 👤 Carlat Benedict
- 👤 Jr Robert H Fidler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:51
CPC Classifications
C; C30; C30B; C30B31/00; C30B31/04; H; H10; H10P; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
THE METHOD OF MAKING A FOUR ZONE SEMICONDUCTOR DEVICE WHICH COMPRISES PLACING A PELLET OF INDIUM HAVING ABOUT 1/2% BY WEIGHT OF ANTIMONY THEREIN IN PHYSICAL CONTACT WITH ONE SURFACE OF AN N-TYPE GERMAINUM WATER, PLACING A PELLET OF INDIUM IN PHYSICAL CONTACT WITH THE OPPOSITE SURFACE OF THE WATER, HEATING THE ASSEMBLY IN A FURNACE TO A TEMPERATURE NOT OVER ABOUT 600*C. BUT SUFFICIENT TO ALLOY THE PELLETS AND THE PARTS OF THE WAFER IN CONTACT THEREWITH AND THEN COOLING THE ASSEMBLY TO ROOM TEMPERATURE TO PREVENT ANY SUBSTANTIAL DIFFUSION AND TO CAUSE TWO ZONES OF OPPOSITE CONDUCTIVITY TYPE TO RESOLIDIFY ADJACENT THE FIRST PELLET FROM THE MULTIPLE ALLOY OF THE GERMANIUM, INDIUM AND ANTIMONY, THE INNERMOST ZONE BEING OF P-TYPE CONDUCTIVITY, AND TO CAUSE A ZONE OF P-TYPE CONDUCTIVITY TO RESOLIDIFY ADJACENT THE OTHER PELLET FROM THE ALLOY OF GERMANIUM AND INDIUM.
Claim 2
Independent Claim
144 words
THE METHOD OF MAKING A FOUR ZONE SEMICONDUCTOR DEVICE WHICH COMPRISES PLACING A PELLET OF INDIUM HAVING ABOUT 1/2% BY WEIGHT OF ANTIMONY THEREIN IN PHYSICAL CONTACT WITH ONE SURFACE OF AN N-TYPE GERMAINUM WATER, PLACING A PELLET OF INDIUM IN PHYSICAL CONTACT WITH THE OPPOSITE SURFACE OF THE WATER, HEATING THE ASSEMBLY IN A FURNACE TO A TEMPERATURE NOT OVER ABOUT 600*C. BUT SUFFICIENT TO ALLOY THE PELLETS AND THE PARTS OF THE WAFER IN CONTACT THEREWITH AND THEN COOLING THE ASSEMBLY TO ROOM TEMPERATURE TO PREVENT ANY SUBSTANTIAL DIFFUSION AND TO CAUSE TWO ZONES OF OPPOSITE CONDUCTIVITY TYPE TO RESOLIDIFY ADJACENT THE FIRST PELLET FROM THE MULTIPLE ALLOY OF THE GERMANIUM, INDIUM AND ANTIMONY, THE INNERMOST ZONE BEING OF P-TYPE CONDUCTIVITY, AND TO CAUSE A ZONE OF P-TYPE CONDUCTIVITY TO RESOLIDIFY ADJACENT THE OTHER PELLET FROM THE ALLOY OF GERMANIUM AND INDIUM.
References Cited (Backward Citations)
US2836521A
Cited
US2840497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |