US3070859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for fabricating semiconductor devices
Assignee: Clevite Corp
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Filing: 1959-10-06
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Granted: 1963-01-01
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Expires: 1979-10-06
Abstract
No abstract record available.
Inventors
- 👤 Noble E Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:31
CPC Classifications
H; H10; H10P; H10P95/00; H10P95/50; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53796; Y10T29/53835
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
A FIXTURE FOR ALLOYING CONTACTS ON SEMICONDUCTOR WAFERS, COMPRISING: AN ALLOYING BOAT INCLUDING BOUNDING SURFACE MEANS DEFINING IN SAID BOAT A CYLINDRICAL CAVITY HAVING A CLOSED BOTTOM AND ADAPTED TO RECEIVE COAXIALLY A CIRCULAR SEMICONDUCTOR WAFER FOR ALLOYING; AND MEANS, INCLUDING A CIRCULAR AND AN ANNULAR PISTON CONCENTRICALLY DISPOSED IN SAID CAVITY FOR LINEAR AXIAL DISPLACEMENT INDEPENDENTLY OF EACH OTHER, DEFINING A CLOSED CHAMBER AT THE BOTTOM OF SAID CAVITY, THE RADIAL DIMENSIONS OF SAID PISTONS GOVERNING THE PLACEMENT AND DIMENSION OF CONTACTS TO BE FORMED ON THE SEMICONDUCTOR WAFER.
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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |