US5743956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing single crystal thin film
Assignee: Shin-Etsu Handotai Co Ltd
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Filing: 1996-06-17
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Granted: 1998-04-28
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Expires: 2016-06-17
Abstract
Abstract A method of producing a high-quality single crystal thin film in which a temperature of a semiconductor single crystal substrate is raised or lowered in a short time with no occurrence of slippage in the substrate. In a cold-wall type reaction vessel, a substrate is placed on a holder which has no heating capability in the reaction vessel and a thin film is grown on the substrate, while a reaction gas is fed to flow in one direction through the reaction vessel, and at the same time, a temperature profile on the substrate along the flow direction of the reaction gas is adjusted to be uniform by a spatially controlled heating energy distribution and/or with the help of an auxiliary heating region provided at an upstream part of the substrate.
Inventors
- 👤 Hitoshi Habuka
- 👤 Masanori Mayuzumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:57
CPC Classifications
C; C30; C30B; C30B25/00; C30B25/02; C30B25/10; C30B25/12
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
81 words
A method of producing a single crystal thin film in a reaction vessel of a cold wall type with a holder which has no capability of heating, said method comprising the steps of: placing a semiconductor single crystal substrate(s) on the holder; feeding a reaction gas to flow in one direction in the vessel; adjusting a temperature profile of the substrate(s) to be uniform along the flow direction of the reaction gas and growing the single crystal film on the substrate(s).
Claim 2
Independent Claim
81 words
A method of producing a single crystal thin film in a reaction vessel of a cold wall type with a holder which has no capability of heating, said method comprising the steps of: placing a semiconductor single crystal substrate(s) on the holder; feeding a reaction gas to flow in one direction in the vessel; adjusting a temperature profile of the substrate(s) to be uniform along the flow direction of the reaction gas and growing the single crystal film on the substrate(s).
Claim 3
Dependent Claim
46 words
A method of producing a single crystal thin film according to claim 1, wherein the temperature profile of the semiconductor single crystal substrate is made uniform by heating more intensively at the upstream side than at the downstream side relative to the center of the substrate(s).
Claim 4
Dependent Claim
58 words
A method of producing a single crystal thin film according to claim 2, wherein the heating is spatially adjusted in such a manner that it is more intensive on the upstream side in terms of receiving energy than on the downstream side by a difference equivalent to 5° C. to 10° C. in temperature change of the substrate(s).
Claim 5
Dependent Claim
44 words
A method of producing a single crystal thin film according to claim 1, wherein an auxiliary heating region for heating the reaction gas is provided in an upstream part relative to the substrate(s) in order to make the temperature profile of the substrate uniform.
Claim 6
Dependent Claim
44 words
A method of producing a single crystal thin film according to claim 2, wherein an auxiliary heating region for heating the reaction gas is provided in an upstream part relative to the substrate(s) in order to make the temperature profile of the substrate uniform.
Claim 7
Dependent Claim
44 words
A method of producing a single crystal thin film according to claim 3, wherein an auxiliary heating region for heating the reaction gas is provided in an upstream part relative to the substrate(s) in order to make the temperature profile of the substrate uniform.
Claim 8
Dependent Claim
22 words
A method of producing a single crystal thin flat according to claim 4, wherein the auxiliary heating region is made of carbon.
Claim 9
Dependent Claim
22 words
A method of producing a single crystal thin film according to claim 5, wherein the auxiliary heating region is made of carbon.
Claim 10
Dependent Claim
22 words
A method of producing a single crystal thin film according to claim 6, wherein the auxiliary heating region is made of carbon.
Claim 11
Dependent Claim
32 words
A method of producing a single crystal thin film according to claim 4, wherein the auxiliary heating region is a heater coated with any material of silicon, silicon carbide, quartz or ceramics.
Claim 12
Dependent Claim
32 words
A method of producing a single crystal thin film according to claim 5, wherein the auxiliary heating region is a heater coated with any material of silicon, silicon carbide, quartz or ceramics.
Claim 13
Dependent Claim
32 words
A method of producing a single crystal thin film according to claim 6, wherein the auxiliary heating region is a heater coated with any material of silicon, silicon carbide, quartz or ceramics.
Claim 14
Dependent Claim
72 words
A method of producing a single crystal thin film according to claim 1, wherein the holder with no capability of heating is made of quartz or silicon carbide, and the substrate(s) is supported on the holder with pointed upper ends of three of more small projections provided thereon so that the ends contact to the backside surface of the substrate or with a ring-like body lying between the substrate(s) and the holder.
Claim 15
Dependent Claim
72 words
A method of producing a single crystal thin film according to claim 2, wherein the holder with no capability of heating is made of quartz or silicon carbide, and the substrate(s) is supported on the holder with pointed upper ends of three of more small projections provided thereon so that the ends contact to the backside surface of the substrate or with a ring-like body lying between the substrate(s) and the holder.
Claim 16
Dependent Claim
72 words
A method of producing a single crystal thin film according to claim 3, wherein the holder with no capability of heating is made of quartz or silicon carbide, and the substrate(s) is supported on the holder with pointed upper ends of three of more small projections provided thereon so that the ends contact to the backside surface of the substrate or with a ring-like body lying between the substrate(s) and the holder.
Claim 17
Dependent Claim
72 words
A method of producing a single crystal thin film according to claim 4, wherein the holder with no capability of heating is made of quartz or silicon carbide, and the substrate(s) is supported on the holder with pointed upper ends of three of more small projections provided thereon so that the ends contact to the backside surface of the substrate or with a ring-like body lying between the substrate(s) and the holder.
Claim 18
Dependent Claim
72 words
A method of producing a single crystal thin film according to claim 5, wherein the holder with no capability of heating is made of quartz or silicon carbide, and the substrate(s) is supported on the holder with pointed upper ends of three of more small projections provided thereon so that the ends contact to the backside surface of the substrate or with a ring-like body lying between the substrate(s) and the holder.
Claim 19
Dependent Claim
72 words
A method of producing a single crystal thin film according to claim 6, wherein the holder with no capability of heating is made of quartz or silicon carbide, and the substrate(s) is supported on the holder with pointed upper ends of three of more small projections provided thereon so that the ends contact to the backside surface of the substrate or with a ring-like body lying between the substrate(s) and the holder.
Claim 20
Dependent Claim
72 words
A method of producing a single crystal thin film according to claim 7, wherein the holder with no capability of heating is made of quartz or silicon carbide, and the substrate(s) is supported on the holder with pointed upper ends of three of more small projections provided thereon so that the ends contact to the backside surface of the substrate or with a ring-like body lying between the substrate(s) and the holder.
Claim 21
Dependent Claim
72 words
A method of producing a single crystal thin film according to claim 10, wherein the holder with no capability of heating is made of quartz or silicon carbide, and the substrate(s) is supported on the holder with pointed upper ends of three of more small projections provided thereon so that the ends contact to the backside surface of the substrate or with a ring-like body lying between the substrate(s) and the holder.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-04-27 | 2001-10-27 | 2002-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-27 | 2005-10-27 | 2006-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-27 | 2009-10-27 | 2010-04-28 | $7700.00 | Window Closed / Lapsed |