Pre-treatment for plating technique

摘要

A method of preparing an electrically insulating polymer substrate, particularly those containing an aromatic group, for the reception of an electrically conductive pattern, said substrate having a glass transition temperature or a softening temperature, comprises the steps of: performing a first cleaning of the substrate; heating the substrate in a nitrogen atmosphere for about 3 hours at a temperature of about 20 DEG C. below the glass transition temperature or the softening temperature of the substrate; cooling the substrate to room temperature; roughening the surface of the substrate by, for example, etching said substrate in a chromic acid-containing solution for about 3 minutes at a temperature of between 65 DEG C. and 70 DEG C.; and performing a second cleaning and drying of the substrate.