Method of polishing CVD diamond films by oxygen plasma
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United States of America Patent
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Jan 11, 2000
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N/A
app pub date -
Oct 27, 1997
filing date -
Oct 27, 1997
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Abstract
A method for polishing the surface of a diamond film with a low power density plasma in a reactor which comprises disposing O.sub.2 gas and a fluorinated gas such as SF.sub.6, NF.sub.3, and C.sub.2 F.sub.6 in the reactor, providing power to the reactor so that the power density in the reactor is between about 1.0 watts/cm.sup.2 and about 1.1 watts/cm.sup.2 for a first duration, and maintaining temperature in the reactor at between about 200.degree. to about 400.degree.. The method may alternatively comprise disposing a sputter gas such as Ar,O.sub.2 or N.sub.2 in the reactor, providing power to the reactor so that the power density in the reactor is between about 3.0 watts/cm.sup.2 and about 7.5 watts/cm.sup.2 for a first duration, and performing a sputter etch, disposing O.sub.2 gas and a fluorinated gas such as SF.sub.6, NF.sub.3, and C.sub.2 F.sub.6 in the reactor, and providing power to the reactor so that the power density in the reactor is between about 1.5 watts/cm.sup.2 and about 3.0 watts/cm.sup.2 for a second duration.
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