US2887453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-conductor activated with dissociated ammonia
Assignee: Siemens Edison Swan Ltd
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Filing: 1957-09-13
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Granted: 1959-05-19
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Expires: 1977-09-13
Abstract
No abstract record available.
Inventors
- 👤 Billig Ernst
- 👤 Gasson Denys Bromley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:45
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/80; C04B41/81; C04B41/85; C30; C30B; C30B31/00; C30B31/06; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S252/00; Y10S252/95; Y10S252/951
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE METHOD OF INTRODUCING NITROGEN AS AN ACTIVATOR INTO SEMI-CONDUCTOR MATERIALS OF THE GROUP CONSISTING OF GERMANIUM, SILICON AND SILICON CARBIDE COMPRISING HEATING THE SEMI-CONDUCTOR MATERIAL TO A TEMPERATURE BELOW ITS MELTING POINT BUT SUFFICIENTLY HIGH FOR AMMONIA TO DISSOCIATE INTO ITS CONSTITUENT ELEMENTS, APPLYING AMMONIA GAS TO THE SURFACE OF THE HEATED SEMI-CONDUCTOR SO THAT THE AMMONIA DISSOCIATES AND ATOMIC NITROGEN DIFFUSES INTO THE SEMI-CONDUCTOR, AND MAINTAINING THE GAS IN CONTACT WITH THE SOLID FOR A TIME SUFFICIENT FOR DIFFUSION TO PROCEED INTO THE SOLID TO THE REQUIRED DEPTH.
Claim 2
Independent Claim
90 words
THE METHOD OF INTRODUCING NITROGEN AS AN ACTIVATOR INTO SEMI-CONDUCTOR MATERIALS OF THE GROUP CONSISTING OF GERMANIUM, SILICON AND SILICON CARBIDE COMPRISING HEATING THE SEMI-CONDUCTOR MATERIAL TO A TEMPERATURE BELOW ITS MELTING POINT BUT SUFFICIENTLY HIGH FOR AMMONIA TO DISSOCIATE INTO ITS CONSTITUENT ELEMENTS, APPLYING AMMONIA GAS TO THE SURFACE OF THE HEATED SEMI-CONDUCTOR SO THAT THE AMMONIA DISSOCIATES AND ATOMIC NITROGEN DIFFUSES INTO THE SEMI-CONDUCTOR, AND MAINTAINING THE GAS IN CONTACT WITH THE SOLID FOR A TIME SUFFICIENT FOR DIFFUSION TO PROCEED INTO THE SOLID TO THE REQUIRED DEPTH.
References Cited (Backward Citations)
US2704708A
Cited
US2834697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |