US2984897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabrication of semiconductor devices
Assignee: AT&T Inc
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Filing: 1959-01-06
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Granted: 1961-05-23
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Expires: 1979-01-06
Abstract
No abstract record available.
Inventors
- 👤 Godfrey James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:53
CPC Classifications
H; H10; H10P; H10P50/00; Y; Y10; Y10S; Y10S156/00; Y10S156/918; Y10S156/93; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/11; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/49812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN THE FABRICATION OF A SEMICONDUCTOR DEVICE THE STEPS OF TEMPORARILY MOUNTING A SEMICONDUCTOR BODY ON A BASE MEMBER FOR PROCESSING WHICH COMPRISE APPLYING A COATING OF A MOLTEN INORGANIC HYDRATED SALT SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM NITRATE HEXAHYDRATE, AMMONIUM ALUMINUM SULFATE, COBALTOUS SULFATE, AND POTASSIUM CHROMIUM SULFATE ON AT LEAST ONE OF THE SURFACE BEING JOINED, APPLYING THE SEMICONDUCTOR BODY TO THE BASE MEMBER AND ALLOWING THE ASSEMBLY TO COOL THEREBY TO SOLIDIFY THE SALT, PERFORMING OPERATIONS ON SAID BODY, AND WASHING THE ASSEMBLY IN WARM WATER THEREBY REMOVING SAID SALT ANF FREEING SAID SEMICONDUCTOR BODY.
Claim 2
Dependent Claim
99 words
IN THE FABRICATION OF A SEMICONDUCTOR DEVICE THE STEPS OF TEMPORARILY MOUNTING A SEMICONDUCTOR BODY ON A BASE MEMBER FOR PROCESSING WHICH COMPRISE APPLYING A COATING OF A MOLTEN INORGANIC HYDRATED SALT SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM NITRATE HEXAHYDRATE, AMMONIUM ALUMINUM SULFATE, COBALTOUS SULFATE, AND POTASSIUM CHROMIUM SULFATE ON AT LEAST ONE OF THE SURFACE BEING JOINED, APPLYING THE SEMICONDUCTOR BODY TO THE BASE MEMBER AND ALLOWING THE ASSEMBLY TO COOL THEREBY TO SOLIDIFY THE SALT, PERFORMING OPERATIONS ON SAID BODY, AND WASHING THE ASSEMBLY IN WARM WATER THEREBY REMOVING SAID SALT ANF FREEING SAID SEMICONDUCTOR BODY.
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) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |