Patent US1918469A successfully refreshed from Google Patents.
US2859142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing semiconductive devices
Assignee: AT&T Inc
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Filing: 1954-06-29
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Granted: 1958-11-04
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Expires: 1974-06-29
Abstract
No abstract record available.
Inventors
- 👤 William G Pfann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:47
CPC Classifications
H; H10; H10P; H10P95/00; C; C30; C30B; C30B15/00; C30B15/20; H10D; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE PROCESS OF MANUFACTURING A SEMICONDUCTIVE DEVICE COMPRISING THE STEPS OF WETTING WITH MOLTEN SEMICONDUCTIVE MATERIAL THE FACES OF AT LEAST TWO ELECTRODES SPACED APART SO THAT SURFACE TENSION FORCES FORM A CONTINUOUS PORTION OF THE SAID MOLTEN SEMICONDUCTIVE MATERIAL BETWEEN THE SAID AT LEAST TWO ELECTRODES, AT LEAST ONE OF SAID ELECTRODES HAVING ASSOCIATED THEREWITH A CONDUCTIVITY TYPE OF DETERMINING IMPURITY FOR SAID SEMICONDUCTIVE MATERIAL IN AMOUNT SUFFICIENT TO PRODUCE A CONDUCTIVITY REGION OF SEMICONDUCTIVE MATERIAL ADJACENT SAID ELECTRODE, SAID CONDUCTIVITY REGION BEING OF THE SAME CONDUCTIVITY TYPE AS THAT OF THE SAID IMPURITY, AND SOLIDIFYING THE SAID PORTION.
Claim 2
Dependent Claim
100 words
THE PROCESS OF MANUFACTURING A SEMICONDUCTIVE DEVICE COMPRISING THE STEPS OF WETTING WITH MOLTEN SEMICONDUCTIVE MATERIAL THE FACES OF AT LEAST TWO ELECTRODES SPACED APART SO THAT SURFACE TENSION FORCES FORM A CONTINUOUS PORTION OF THE SAID MOLTEN SEMICONDUCTIVE MATERIAL BETWEEN THE SAID AT LEAST TWO ELECTRODES, AT LEAST ONE OF SAID ELECTRODES HAVING ASSOCIATED THEREWITH A CONDUCTIVITY TYPE OF DETERMINING IMPURITY FOR SAID SEMICONDUCTIVE MATERIAL IN AMOUNT SUFFICIENT TO PRODUCE A CONDUCTIVITY REGION OF SEMICONDUCTIVE MATERIAL ADJACENT SAID ELECTRODE, SAID CONDUCTIVITY REGION BEING OF THE SAME CONDUCTIVITY TYPE AS THAT OF THE SAID IMPURITY, AND SOLIDIFYING THE SAID PORTION.
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) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |