US3341361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for providing a silicon sheet
Assignee: Union Carbide Corp
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Filing: 1963-02-21
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Granted: 1967-09-12
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Expires: 1983-02-21
Abstract
No abstract record available.
Inventors
- 👤 Daniel A Gorski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:49
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; C; C30; C30B; C30B15/00; C30B15/007; H; H10; H10P; H10P10/00; H10P10/12; H10W; H10W72/00; H10W72/30; H10W72/071; H10W72/073; H10W72/07331; H10W72/07337; Y; Y10; Y10S; Y10S148/00; Y10S148/054; Y10S148/073; Y10S148/107; Y10S148/122; Y10S148/15; Y10S148/152
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PROCESS FOR PRODUCING A SILICON SHEET OF RELATIVELY LARGE SILICON CRYSTALS BONDED TO A SILICON NITRIDE SUBSTRATE, WHICH PROCESS COMPRISES: (A) PROVIDING SAID SILICON NITRIDE SUBSTRATE WITH A SURFACE THAT IS SUFFICIENTLY SMOOTH THAT MOLTEN SILICON IS NON-ADHERENT THERETO; (B) PROVIDING THE SMOOTH SURFACE OF SAID SUBSTRATE WITH AT LEAST ONE NUCLEATING SITE; (C) CONTACTING THE SMOOTH SURFACE OF SAID SUBSTRATE AND SAID NUCLEATING SITE THEREON WITH MOLTEN SILICON SO AS TO PROPAGATE A MOLTEN SILICON SHEET FROM SAID NUCLEATING SITE OVER AND IN CONTACT WITH THE SMOOTH SURFACE OF SAID SUBSTRATE; (D) AND BONDING SAID SILICON SHEET TO SAID SMOOTH SURFACE OF SAID SUBSTRATE BY FREEZING SAID SHEET THEREON.
Claim 2
Dependent Claim
111 words
A PROCESS FOR PRODUCING A SILICON SHEET OF RELATIVELY LARGE SILICON CRYSTALS BONDED TO A SILICON NITRIDE SUBSTRATE, WHICH PROCESS COMPRISES: (A) PROVIDING SAID SILICON NITRIDE SUBSTRATE WITH A SURFACE THAT IS SUFFICIENTLY SMOOTH THAT MOLTEN SILICON IS NON-ADHERENT THERETO; (B) PROVIDING THE SMOOTH SURFACE OF SAID SUBSTRATE WITH AT LEAST ONE NUCLEATING SITE; (C) CONTACTING THE SMOOTH SURFACE OF SAID SUBSTRATE AND SAID NUCLEATING SITE THEREON WITH MOLTEN SILICON SO AS TO PROPAGATE A MOLTEN SILICON SHEET FROM SAID NUCLEATING SITE OVER AND IN CONTACT WITH THE SMOOTH SURFACE OF SAID SUBSTRATE; (D) AND BONDING SAID SILICON SHEET TO SAID SMOOTH SURFACE OF SAID SUBSTRATE BY FREEZING SAID SHEET THEREON.
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |