SOLDER JOINTS FOR COPPER METALLIZATION HAVING REDUCED INTERFACIAL VOIDS

摘要

A metal interconnect structure ( 100 ) comprising a bond pad ( 101 ), which has copper with at least 70 volume percent composed of crystal grains expanding more than 1 mum in their main direction, and 30 or less volume percent composed of crystal grains, which expand less than 1 mum in their main crystal direction. A body ( 102 ) of tin alloy is in contact with the bond pad.