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Patent US4584053A successfully refreshed from Google Patents.
US4584053A
Expired / Lapsed
US
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Process for preparing ZnSe single crystal
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1984-06-22
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Granted: 1986-04-22
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Expires: 2004-06-22
Abstract
Abstract A process for preparing a large ZnSe single crystal, comprising vacuum sealing polycrystalline ZnSe prepared by a chemical vapor deposition in a capable and hot isostatically pressing polycrystalline ZnSe in the capsule, by which the ZnSe single crystal having such high qualities as to be used as a substrate on which an epitaxial layer of ZnSe can be grown.
Inventors
- 👤 Hirokuni Namba
- 👤 Hajime Osaka
- 👤 Koichi Kamon
- 👤 Fuminori Higuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:29
CPC Classifications
C; C30; C30B; C30B1/00; C30B1/12; C30B29/00; C30B29/10; C30B29/46; C30B29/48
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
55 words
A process for preparing a large ZnSe single crystal, comprising vacuum sealing polycrystalline ZnSe prepared by a chemical vapor phase deposition in a capsule and hot isostatically pressing the polycrystalline ZnSe in the capsule at a temperature of at least 1,000° C. and a pressure of at least 2,000 atm for at least one hour.
Claim 2
Dependent Claim
55 words
A process for preparing a large ZnSe single crystal, comprising vacuum sealing polycrystalline ZnSe prepared by a chemical vapor phase deposition in a capsule and hot isostatically pressing the polycrystalline ZnSe in the capsule at a temperature of at least 1,000° C. and a pressure of at least 2,000 atm for at least one hour.
Claim 3
Dependent Claim
35 words
A process according to claim 1, wherein the polycrystalline ZnSe in the capsule is hot isostatically pressed at a temperature of from 1,000° to 1,200° C. and a pressure of from 2,000 to 2,300 atm.
Claim 4
Dependent Claim
26 words
A process according to claim 1, wherein the polycrystalline ZnSe in the capsule is hot isostatically pressed at 1,000° C. and 2,000 atm for two hours.
Claim 5
Dependent Claim
14 words
A process according to claim 1, wherein the capsule is made of heat-resistant glass.
References Cited (Backward Citations)
US3146204A
Cited
JPS55132046A
Cited
JPS5717411A
Cited
JPS5751103A
Cited
JPS57106507A
Cited
US4465546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |