Patent EP0442303B1 successfully refreshed from Google Patents.
EP0442303B1
Expired / Lapsed
EP
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CVD Diamond workpieces and their fabrication
Assignee: General Electric Co
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Filing: 1991-01-25
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Granted: 1995-12-06
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Expires: 2011-01-25
Abstract
No abstract record available.
Inventors
- 👤 Robert Charles Devries
- 👤 Thomas Richard Anthony
- 👤 James Fulton Fleischer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 13:04
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/26; C23C16/27; C23C16/01
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
A method for making a three-dimensional diamond workpiece which consists of : (a) placing in a chamber a multi-planar pattern heated to a CVD diamond-forming temperature of from 500 to 1100°C, said pattern being the negative of said workpiece; (b) providing a hydrocarbon/hydrogen gaseous mixture within said chamber at a pressure of from 0.13 to 1334 mbar (0.01 to 1000 Torr); (c) at least partially decomposing said gaseous mixture in said chamber to form a CVD diamond layer on more than one surface of said multi-planar pattern; and (d) removing said pattern from said CVD diamond layer to form said diamond workpiece which possesses the surface characteristics of the surface of the pattern upon which it was formed.
Claim 2
Dependent Claim
24 words
The method of Claim 1 wherein the molar ratio of hydrocarbon to hydrogen in said gaseous mixtures ranges from between about 1:10 and 1:1,000.
Claim 3
Dependent Claim
14 words
The method of Claim 2 wherein said gaseous mixture additionally comprises an inert gas.
Claim 4
Dependent Claim
14 words
The method of Claim 1 wherein said hydrocarbon of said gaseous mixture comprises methane.
Claim 5
Dependent Claim
18 words
The method of Claim 1 wherein said pattern is manufactured from metal, an alloy, a ceramic, or carbon.
Claim 6
Dependent Claim
21 words
The method of Claim 1 wherein said formed CVD diamond layer ranges in thickness from between about 1 and 2000 micrometers.
Claim 7
Dependent Claim
26 words
The method of Claim 1 wherein the surface of said pattern upon which said CVD diamond layer is formed has been finished to optical mirror quality.
Claim 8
Dependent Claim
16 words
The method of Claim 1 wherein said removed CVD diamond layer is attached to a support.
Claim 9
Dependent Claim
16 words
The method of Claim 8 wherein said support is a metal, an alloy, or a ceramic.
References Cited (Backward Citations)
EP0319926A2
Cited
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