COATED COPPER WIRE FOR BALL BONDING

摘要

Provided is a coated copper wire for ball bonding wherein inconvenience due to oxidation of a Cu or Cu alloy core material can be avoided at the time of ball-up after tear-off. Also provided is a coated copper wire characterized in that the coated copper wire is a bonding wire having a core material consisting of a copper-phosphorus alloy, an intermediate layer consisting of palladium or platinum formed on the core material, and a skin layer consisting of gold formed on the intermediate layer.