Coating processes – Electrical product produced – Welding electrode
Patent
1985-12-19
1988-11-01
Bleutge, John C.
Coating processes
Electrical product produced
Welding electrode
522172, 522914, 528 31, 556487, 428447, B05D 306, C08G 7712
Patent
active
047819421
ABSTRACT:
A process for forming on the surface of a substrate a layer of a siloxane polymer by exposing the substrate to a first vapor phase monomer precursor having the formula SiR.sub.x H.sub.4-x where x is 1 to 4 and R is alkyl or phenyl, and a second vapor phase oxygen-containing precursor in the presence of radiation of a predetermined wavelength to bring about the reaction to form the siloxane polymer which deposits on the surface of substrate. The monomer precursor may comprise a mixture, such as SiRH.sub.3 and SiR.sub.2 H.sub.2 with each other or with SiR.sub.3 H. By varying the composition of such mixtures, the composition of the siloxane polymer may be chosen to provide predetermined properties, and, further, may be varied throughout the thickness of the deposited layer.
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Hall James T.
Leyden Richard N.
Bleutge John C.
Hughes Aircraft Company
Karambelas A. W.
Koeckert Arthur H.
Lachman Mary E.
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