Patent ID: 6468401
Filing Date: 2002-10-22
Classification: C23C

Abstract:
A method for preparing a rubber composite material comprising the steps of:forming a thin film of a cobalt oxide on a substrate, forming a rubber composition on the thin film, and vulcanizing the rubber composition, wherein said step of forming a thin film of cobalt oxide comprises the steps of: determining from a relationship of an input power supplied from a DC supply to a target to an input voltage between said target and said substrate, during a step of provisional sputtering at a vacuum and in a ratio of the oxygen-bearing gas to the inert gas, a transition point of input power at which an abrupt change of the input voltage occurs; sputtering said target of a cobalt in the presence of an inert gas and a gas having molecular oxygen; and controlling the input power during sputtering to be at least the transition point, thereby controlling the value of x in CoOx, wherein the sputtering carried out after the determination of the transition point is carried out with an input power which is higher than the transition point by at least 50 W, thereby obtaining, a cobalt oxide represented by CoOx wherein x 0.1 to 0.7, and said rubber composition is formed on said thin film of cobalt oxide without heat treating said thin film of cobalt oxide on the substrate.