US5587019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for use in epitaxial crystal growth
Assignee: NEC Electronics Corp
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Filing: 1993-02-23
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Granted: 1996-12-24
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Expires: 2013-02-23
Abstract
Abstract This apparatus comprises a reactor having an inner container made of quartz, a transparent quartz window at the upper end of said reactor, a gas supply pipe for supplying a reactive gas into said reactor and an exhaust pipe for exhausting the gas remaining in the reactor. The apparatus also comprises an infrared lamp house rotatably mounted over the quartz window, and having therein a multiplicity of infrared lamps and a transparent quartz window at the lower end of the lamp house facing the quartz window of the reactor. Since the semiconductor substrate in the reactor is uniformly heated by the isolated lamp house, it is not subjected to dust that can be given off from the rotating lamp house, nor to the turbulence of the reactive gas, thereby allowing uniform growth of a semiconductor crystal on the substrate.
Inventors
- 👤 Koji Fujie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:56
CPC Classifications
C; C30; C30B; C30B25/00; C30B25/02; C30B25/10; C23; C23C; C23C16/00; C23C16/44; C23C16/48; C23C16/481; C30B25/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
128 words
An apparatus for epitaxially growing a semiconductor crystal, comprising: a reactor having an inner container made of quartz, a transparent quartz window at the upper end of said reactor, a gas supply pipe for supplying a reactive gas into said reactor and an exhaust pipe for exhausting the gas remaining in the reactor, with both tubes mounted through opposite side walls of the reactor, respectively, said reactor being completely sealed except for said gas supply and exhaust pipes; a semiconductor support member fixedly mounted in said container of said reactor for supporting a semiconductor substrate; and a hermetically sealed infrared lamp housing rotatably mounted over said quartz window and in parallel with said quartz window, wherein said reactor and said lamp housing are completely separate from each other.
Claim 2
Independent Claim
128 words
An apparatus for epitaxially growing a semiconductor crystal, comprising: a reactor having an inner container made of quartz, a transparent quartz window at the upper end of said reactor, a gas supply pipe for supplying a reactive gas into said reactor and an exhaust pipe for exhausting the gas remaining in the reactor, with both tubes mounted through opposite side walls of the reactor, respectively, said reactor being completely sealed except for said gas supply and exhaust pipes; a semiconductor support member fixedly mounted in said container of said reactor for supporting a semiconductor substrate; and a hermetically sealed infrared lamp housing rotatably mounted over said quartz window and in parallel with said quartz window, wherein said reactor and said lamp housing are completely separate from each other.
Claim 3
Dependent Claim
55 words
An apparatus as claimed in claim 1, wherein said infrared lamp housing has a transparent quartz window in the lower end of said housing, said window of said lamp housing facing said upper quartz window of said reactor in a spaced parallel relationship; and said infrared lamp housing encloses therein a multiplicity of infrared lamps.
Claim 4
Dependent Claim
39 words
An apparatus as claimed in claim 1, wherein said semiconductor support member includes a suscepter made of high purity carbon with its surface coated with silicon carbide, said suscepter being mounted at the upper end of a quartz supporter.
Claim 5
Dependent Claim
29 words
An apparatus as claimed in claim 3, wherein said suscepter is provided with a recess formed on the upper surface of said suscepter for receiving therein a semiconductor substrate.
Claim 6
Dependent Claim
36 words
An apparatus as claimed in claim 1, wherein said semiconductor support member is a quartz supporter secured on the bottom of said container and having a structure to support the peripheral portion of said semiconductor substrate.
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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) | 1999-12-24 | 2000-06-24 | 2000-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-24 | 2004-06-24 | 2004-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-24 | 2008-06-24 | 2008-12-24 | $7700.00 | Window Closed / Lapsed |