Nickel colloid catalyst solution for electroless nickel or nickel alloy plating and method for electroless nickel or nickel alloy plating

Abstract

The invention provides a method for electroless nickel or nickel alloy plating. In the method, a non-conductive substrate is immersed in a liquid containing a surfactant for adsorption promotion treatment, and then the non-conductive substrate is treated with a nickel colloid catalyst solution for electroless nickel plating. Catalyst gives, then carries out electroless nickel plating, wherein the nickel colloidal catalyst solution for electroless nickel plating contains soluble nickel salt (A), reducing agent (B), and by glucose, fructose, sorbitol, xylitol, maltitol, mannitol The colloidal stabilizer (C) of specific carbohydrate composition such as. Catalyst imparting and electroless nickel plating are performed using a nickel colloidal catalyst solution that has excellent stability over time and repeated use resistance after catalyst activity is enhanced by adsorption promotion treatment, so a uniform nickel film without precipitation spots can be obtained. Even if a nickel alloy plating method is used instead of the nickel plating method described above, a nickel alloy film having excellent uniformity can be obtained.

Description

technical field [0001] The present invention relates to a nickel colloid catalyst solution for imparting a catalyst when electroless nickel or nickel alloy plating is performed on a non-conductive substrate, and an electroless plating method using the catalyst solution, which provides excellent stability over time and can form a uniform appearance It is a catalyst solution that has no streaky nickel or nickel alloy film, and can improve the effectiveness of repeated use of the nickel colloid catalyst solution by inserting a predetermined treatment before catalyst application. Background technique [0002] In order to represent resin substrates such as glass-epoxy resin, glass-polyimide resin, epoxy resin, polyimide resin, polycarbonate resin, ABS resin, PET resin, etc., including glass substrates, ceramic substrates, etc. Electroless nickel or nickel alloy plating is carried out on the non-conductive substrate inside. The conventional method is: firstly, metals such as palla...

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Problems solved by technology

However, electroless nickel plating cannot be performed on precious metals such as gold because palladium catalyst nuclei are not replaced and precipitated (paragraph 4)

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