Patent US4816286A successfully refreshed from Google Patents.
US4816286A
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US
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Process for synthesis of diamond by CVD
Assignee: Resonac Holdings Corp
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Filing: 1986-11-25
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Granted: 1989-03-28
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Expires: 2006-11-25
Abstract
Abstract A synthesizing process for diamond by the chemical vapor phase growth method, characterized by converting an organic compound containing carbon, hydrogen and at least one of oxygen and nitrogen, to a gas phase, mixing the gas with hydrogen gas, decomposing the mixed gas by an energy of heat, electron beam, light, direct current glow discharge, alternating current glow discharge, or direct current arc discharge, and introducing the decomposed gas to the surface of a heated substrate (5) to deposit diamond on the surface of the substrate.
Inventors
- 👤 Yoichi Hirose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:53
CPC Classifications
C; C30; C30B; C30B25/00; C30B25/02; C30B29/00; C30B29/02; C30B29/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
85 words
A synthesizing process for diamond by a chemical vapor phase growth method, characterized by converting an organic compound containing carbon, hydrogen and at least one of oxygen and nitrogen, to a gas phase, mixing the gas with hydrogen gas, decomposing the mixed gas by an energy of heat, electron beam, light, direct current glow discharge, alternating current glow discharge, or direct current arc discharge, and introducing the decomposed gas to the surface of a heated substrate to deposit diamond on the surface of the substrate.
Claim 2
Dependent Claim
85 words
A synthesizing process for diamond by a chemical vapor phase growth method, characterized by converting an organic compound containing carbon, hydrogen and at least one of oxygen and nitrogen, to a gas phase, mixing the gas with hydrogen gas, decomposing the mixed gas by an energy of heat, electron beam, light, direct current glow discharge, alternating current glow discharge, or direct current arc discharge, and introducing the decomposed gas to the surface of a heated substrate to deposit diamond on the surface of the substrate.
Claim 3
Dependent Claim
29 words
A synthesizing process according to claim 1, wherein the heat for said decomposition is generated by a heater heated to a temperature of from 1500° C. to 2800° C.
Claim 4
Dependent Claim
26 words
A synthesizing process according to claim 1, wherein the electron beam for said decomposition has a current density of not less than 1 mA/cm 2 .
Claim 5
Dependent Claim
21 words
A synthesizing process according to claim 1, wherein the light for decomposition has a wavelength of not more than 600 nm.
Claim 6
Dependent Claim
29 words
A synthesizing process according to claim 1, wherein the electric discharge for said decomposition is carried out at a power density of not less than 1 W/cm 2 .
Claim 7
Dependent Claim
32 words
A synthesizing process according to any one of claims 1 through 5, wherein the pressure of a reaction tube, in which said decomposition is carried out, is from 0.01 to 1000 Torr.
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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) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |