US2959502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabrication of semiconductor devices
Assignee: Individual
•
Filing: 1959-09-01
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Granted: 1960-11-08
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Expires: 1979-09-01
Abstract
No abstract record available.
Inventors
- 👤 Wolfgang W Gaertner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:43
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/40; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
THE PROCESS OF MASS-PRODUCING SEMICONDUCTOR DEVICES TO INTRODUCE A P-N JUINCTION THEREIN COMPRISING ETCHING A WAFER OF SEMICONDUCTOR MATERIAL OF A FIRST CONDUCTIVITY TYPE, PRINTING A COMPOSITION UPON THE SURFACE OF SAID SEMICONDUCTOR WAFER AS A PLURALITY OF DOTS EACH SEPARATED BY PREDETERMINED SPACING, WHICH COMPOSITION COMPRISES A PORTION OF IMPURITY OF THE OPPOSITE CONDUCTIVITY TYPE MIXED WITH EQUAL AMOUNTS BY WEIGHT OF A BINDER CONSISTING OF 10 GRAMS NITRO CELLULOSE DISSOLVED IN 400 CUBIC CENTIMETERS AMYL ACETATE, HEATING SAID WAFER AND SAID COMPOSITION AT ABOUT 500*C. FOR ABOUT 2 MINUTES, THEREBY TO FORM A PLURALITY OF P-N JUNCTIONS WITHIN SAID WAFER, RE-ETCHING THE SURFACE OF SAID WAFER CONTAINING SAID JUNCTIONS, AND CUTTING SAID WAFER INTO DICE EACH OF WHICH CONTAINS A P-N JUNCTION.
Claim 2
Dependent Claim
124 words
THE PROCESS OF MASS-PRODUCING SEMICONDUCTOR DEVICES TO INTRODUCE A P-N JUINCTION THEREIN COMPRISING ETCHING A WAFER OF SEMICONDUCTOR MATERIAL OF A FIRST CONDUCTIVITY TYPE, PRINTING A COMPOSITION UPON THE SURFACE OF SAID SEMICONDUCTOR WAFER AS A PLURALITY OF DOTS EACH SEPARATED BY PREDETERMINED SPACING, WHICH COMPOSITION COMPRISES A PORTION OF IMPURITY OF THE OPPOSITE CONDUCTIVITY TYPE MIXED WITH EQUAL AMOUNTS BY WEIGHT OF A BINDER CONSISTING OF 10 GRAMS NITRO CELLULOSE DISSOLVED IN 400 CUBIC CENTIMETERS AMYL ACETATE, HEATING SAID WAFER AND SAID COMPOSITION AT ABOUT 500*C. FOR ABOUT 2 MINUTES, THEREBY TO FORM A PLURALITY OF P-N JUNCTIONS WITHIN SAID WAFER, RE-ETCHING THE SURFACE OF SAID WAFER CONTAINING SAID JUNCTIONS, AND CUTTING SAID WAFER INTO DICE EACH OF WHICH CONTAINS A P-N JUNCTION.
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) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |