Coating processes – Direct application of electrical – magnetic – wave – or... – Chemical vapor deposition
Patent
1993-07-08
1995-02-07
King, Roy V.
Coating processes
Direct application of electrical, magnetic, wave, or...
Chemical vapor deposition
427596, 427249, 4272555, 423446, B05D 306
Patent
active
053874439
ABSTRACT:
A method for synthesizing a diamond by vapor deposition permits selectively growing high quality diamond on any desired region of a base material at a lower temperature compared to respective conventional temperatures starting with a raw material gas which is prepared by diluting a compound containing carbon atoms such as methane with hydrogen gas. This diluted raw material gas is irradiated with a laser beam satisfying at least one of the following two conditions, namely a spread angle of 1.times.10.sup.-1 mrad to 5.times.10.sup.-1 mrad during oscillation or a half-power band width of 1.times.10.sup.-4 nm to 1.times.10.sup.-1 nm with respect to a band width of an oscillation having a wavelength of 190 nm to 360 nm. Diamond is deposited on the base material from a chemical species generated by such irradiation.
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"Vapor Deposition of Diamond Particles From Methane" by Matsumoto et al.; Japanese Journal of Applied Physics, vol. 21, No. 4, Apr. 1982, pp. L183-L185.
Fujimori Naoji
Ota Nobuhiro
Watanabe Ken'ichi
Fasse W. F.
Fasse W. G.
King Roy V.
Sumitomo Electric Industries Ltd.
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