The electronics industry underwent a rapid evolution from thick to thin films during the last decade. Electrochemical technology played an important and often decisive role in the direction of this evolution. Applications include plating through mask technology, plating for thin film heads, plating for high density magnetic thin film, selective etching technology, etc. New electrochemical approaches have also been developed which will play key roles in the electronics industry. This book reports on the latest progress in electrochemical processes, including fundamentals and applications. Additional volumes dealing with more specific applications of electrochemistry are also planned.