Processes for the preparation of polycrystalline diamond films
First Claim
1. A process for the preparation of continuous polycrystalline diamond films which comprises applying to a substrate diamond powder in an amount of from about one particle per ten square microns to about 10 particles per square micron with an average particle diameter of from about 0.1 to about 0.4 micron;
- heating the resulting powdered substrate subsequent to incorporation in a processing apparatus;
introducing a mixture of gases into the apparatus, which gases provide a supply of carbon and hydrogen; and
decomposing the gas mixture.
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Abstract
A process for the preparation of continuous polycrystalline diamond films which comprises applying to a substrate diamond powder in an amount of from about one particle per ten square microns to about 10 particles per square micron with an average particle diameter of from about 0.1 to about 0.4 micron; heating the resulting powdered substrate subsequent to incorporation in a processing apparatus; introducing a mixture of gases into the chamber, which gases provide a supply of carbon and hydrogen; and decomposing the gas mixture.
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Citations
57 Claims
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1. A process for the preparation of continuous polycrystalline diamond films which comprises applying to a substrate diamond powder in an amount of from about one particle per ten square microns to about 10 particles per square micron with an average particle diameter of from about 0.1 to about 0.4 micron;
- heating the resulting powdered substrate subsequent to incorporation in a processing apparatus;
introducing a mixture of gases into the apparatus, which gases provide a supply of carbon and hydrogen; and
decomposing the gas mixture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 45, 47, 49, 51, 52, 53, 54, 56)
- heating the resulting powdered substrate subsequent to incorporation in a processing apparatus;
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31. A process for the preparation of continuous polycrystalline diamond which comprises applying to a substrate diamond powder in an amount of from about one particle per ten square microns to about 10 particles per square micron with a particle size of from about 0.1 to about 0.4 micron;
- incorporating the substrate into a deposition system;
applying a vacuum of from about 1 mTorr to about 1 Torr;
heating the resulting powdered substrate to a temperature of from about 800°
to about 900°
C.;
introducing into the chamber a mixture of gases or vapors comprised of a carbon containing gas and hydrogen;
adjusting the total pressure to from about 10 Torr to about 100 Torr; and
decomposing the gas mixture whereby polycrystalline diamond is formed on the substrate on nucleation sites provided by the powder. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 46, 48, 50, 55, 57)
- incorporating the substrate into a deposition system;
Specification