US2964435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor devices and their manufacture
Assignee: McGraw Edison Co
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Filing: 1957-03-27
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Granted: 1960-12-13
•
Expires: 1977-03-27
Abstract
No abstract record available.
Inventors
- 👤 Paskell Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:50
CPC Classifications
H; H10; H10P; H10P95/00; H01; H01C; H01C7/00; H01C7/10; H01C7/1013; H10D; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A SEMICONDUCTOR DEVICE COMPRISING A WAFER OF SEMICONDUCTIVE MATERIAL OF A PRESCRIBED CONDUCTIVITY TYPE AND DEFINING A CROSS-SECTIONAL AREA INCLUDING FIRST AND SECOND PORTIONS HAVING AN IMPURITY DIFFUSED THEREIN, SAID IMPURITY IMPARTING TO SAID PORTIONS A CONDUCTIVITY TYPE OPPOSITE SAID PRESCRIBED TYPE, AND DEPTH OF SAID IMPURITY IN SAID FIRST AND SECOND PORTIONS BEING DIFFERENT LEVELS, SAID PORTIONS AND SAID PRESCRIBED CONDUCTIVITY AREA JOINTLY DEFINING INTEGRAL PARALLEL GRADED JUNCTIONS.
Claim 2
Dependent Claim
69 words
A SEMICONDUCTOR DEVICE COMPRISING A WAFER OF SEMICONDUCTIVE MATERIAL OF A PRESCRIBED CONDUCTIVITY TYPE AND DEFINING A CROSS-SECTIONAL AREA INCLUDING FIRST AND SECOND PORTIONS HAVING AN IMPURITY DIFFUSED THEREIN, SAID IMPURITY IMPARTING TO SAID PORTIONS A CONDUCTIVITY TYPE OPPOSITE SAID PRESCRIBED TYPE, AND DEPTH OF SAID IMPURITY IN SAID FIRST AND SECOND PORTIONS BEING DIFFERENT LEVELS, SAID PORTIONS AND SAID PRESCRIBED CONDUCTIVITY AREA JOINTLY DEFINING INTEGRAL PARALLEL GRADED JUNCTIONS.
References Cited (Backward Citations)
US2505633A
Cited
US2694024A
Cited
US2692839A
Cited
BE514927A
Cited
US2776920A
Cited
GB753140A
Cited
FR1135345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |