US2953486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Junction formation by thermal oxidation of semiconductive material
Assignee: AT&T Inc
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Filing: 1959-06-01
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Granted: 1960-09-20
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Expires: 1979-06-01
Abstract
No abstract record available.
Inventors
- 👤 Martin M Atalla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:56
CPC Classifications
H; H10; H10P; H10P95/00; H10P32/00; H10P32/10; H10P32/14; H10P32/1408; H10P32/141; H10P32/17; H10P32/171; H10W; H10W74/00; H10W74/40; H10W74/43; Y; Y10; Y10S; Y10S438/00; Y10S438/914; Y10S438/92
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD OF FORMING AT LEAST ON RECTIFYING JUNCTION IN A SEMICONDUCTIVE CRYSTAL SELECTED FROM THE GROUP CONSISTING OF GERMANIUM AND SILICON COMPRISING THE STEPS OF GROWING A SEMICONDUCTOR CRYSTAL FROM A MELT INCLUDING A FIRST CONDUCTIVITY TYPE AND A SECOND CONDUCTIVITY ISTIC OF ONE CONDUCTIVITY TYPE AND SECOND CONDUCTIVITY DETERMING IMPURITY CHARACTERISTIC OF THE OPPOSITE CONDUCTIVITY TYPE, SAID FIRST IMPURITY HAVING A PRESELECTED CONDENTRATION AND DIFFUSION COEFFICIENT, SAID SECOND IMPURITY HAVING A RELATIVELY HIGHER CONCENTRATION AND A RELATIVELY HIGHER DIFFUSION COEFFICIENT, THE RATIO OF THE CONCEN-
Claim 2
Independent Claim
87 words
A METHOD OF FORMING AT LEAST ON RECTIFYING JUNCTION IN A SEMICONDUCTIVE CRYSTAL SELECTED FROM THE GROUP CONSISTING OF GERMANIUM AND SILICON COMPRISING THE STEPS OF GROWING A SEMICONDUCTOR CRYSTAL FROM A MELT INCLUDING A FIRST CONDUCTIVITY TYPE AND A SECOND CONDUCTIVITY ISTIC OF ONE CONDUCTIVITY TYPE AND SECOND CONDUCTIVITY DETERMING IMPURITY CHARACTERISTIC OF THE OPPOSITE CONDUCTIVITY TYPE, SAID FIRST IMPURITY HAVING A PRESELECTED CONDENTRATION AND DIFFUSION COEFFICIENT, SAID SECOND IMPURITY HAVING A RELATIVELY HIGHER CONCENTRATION AND A RELATIVELY HIGHER DIFFUSION COEFFICIENT, THE RATIO OF THE CONCEN-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |