Patent ID: 6524663
Filing Date: 2003-02-25
Classification: C04B,C23C,H05K

Abstract:
A method of surface activating a substrate prior to an electroless plating of the substrate comprising:A. forming a deposit or coating of a surface activation compound on the substrate, which surface activation compound has the property of activating a surface for electroless plating of a desired conducting material and contains a photolabile group as a ligand to a metal, wherein the metal is &pgr;-bonded to a substituted lower alkenyl group in the ligand, the lower alkenyl group having one or more olefinic double bonds and having from 2 to 10 carbon atoms in a straight or branched chain or a carbocycle, B. irradiating the surface compound in the absence of solvent with an excimer lamp emitting ultraviolet radiation in the wavelength range which overlaps with an optical absorption band arising due to the ligand to metal photolabile group to decompose the compound to produce directly a surface activation metal; wherein the surface activation compound is selected from the group consisting of a &pgr;-lower alkenyl-acetylacetonato metal (II) compound, a &pgr;-lower alkenyl dibenzoylmethyl-metal (II) compound, a bis (&pgr;-lower alkenyl-halo-metal (II)) compound, in which â€œhaloâ€  represents bromo, chloro, iodo or fluoro, and cyclooctadiene metal (II) dihalide where â€œhalideâ€  represents chloride, bromide, iodide or fluoride.