US2937110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective treatment for semiconductor devices
Assignee: Westinghouse Electric Corp
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Filing: 1958-07-17
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Granted: 1960-05-17
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Expires: 1978-07-17
Abstract
No abstract record available.
Inventors
- 👤 Harold F John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:01
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/10; H10W74/111; H10W74/127; H10W74/40; H10W74/47
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A SEMICONDUCTOR DEVICE COMPRISING A SEMICONDUCTOR WAFER COMPRISED OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF SILICON, GERMANIUM AND SILICON-GERMANIUM ALLOYS, SAID WAFER HAVING AT LEAST ONE ZONE OF N-TYPE CONDUCTIVITY AND AT LEAST ONE ZONE OF P-TYPE CONDUCTIVITY, AND A PROTECTIVE COATING HAVING A MINIMUM THICKNESS IN THE RANGE OF 0.5 TO 2.0 MM. DISPOSED ABOUT AND COMPLETELY COVERING THE EXPOSED JUNCTION AREA BETWEEN SAID ZONES OF THE SEMICONDUCTOR WAFER, SAID COATING BEING COMPRISED OF 1 PART BY WEIGHT OF AN ELASTOMERIC SILICONE RESIN AND FROM ABOUT 0.6 TO 2.0 PARTS BY WEIGHT OF A METAL OXIDE, SAID METAL OXIDE BEING SELECTED FROM AT LEAST ONE OF THE GROUP CONSISTING OF LEAD TETRAOXIDE AND MERCURIC-OXIDE AND HAVING AN AVERAGE PARTICLE SIZE IN THE RANGE OF 0.1 TO 10 MICRONS, SAID METAL OXIDE BEING DISPERSED HOMOGENEOUSLY THROUGHOUT THE ELASTOMERIC SILICONE RESIN.
Claim 2
Dependent Claim
142 words
A SEMICONDUCTOR DEVICE COMPRISING A SEMICONDUCTOR WAFER COMPRISED OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF SILICON, GERMANIUM AND SILICON-GERMANIUM ALLOYS, SAID WAFER HAVING AT LEAST ONE ZONE OF N-TYPE CONDUCTIVITY AND AT LEAST ONE ZONE OF P-TYPE CONDUCTIVITY, AND A PROTECTIVE COATING HAVING A MINIMUM THICKNESS IN THE RANGE OF 0.5 TO 2.0 MM. DISPOSED ABOUT AND COMPLETELY COVERING THE EXPOSED JUNCTION AREA BETWEEN SAID ZONES OF THE SEMICONDUCTOR WAFER, SAID COATING BEING COMPRISED OF 1 PART BY WEIGHT OF AN ELASTOMERIC SILICONE RESIN AND FROM ABOUT 0.6 TO 2.0 PARTS BY WEIGHT OF A METAL OXIDE, SAID METAL OXIDE BEING SELECTED FROM AT LEAST ONE OF THE GROUP CONSISTING OF LEAD TETRAOXIDE AND MERCURIC-OXIDE AND HAVING AN AVERAGE PARTICLE SIZE IN THE RANGE OF 0.1 TO 10 MICRONS, SAID METAL OXIDE BEING DISPERSED HOMOGENEOUSLY THROUGHOUT THE ELASTOMERIC SILICONE RESIN.
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) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |