Patent ID: 10381203

Abstract:
Provided is a backing plate obtaining by bonding an anticorrosive metal and Mo or a Mo alloy, wherein the backing plate comprises, on a surface of the Mo or Mo alloy backing plate to be cooled (cooling surface side), a layer having a thickness corresponding to 1/40 to ⅛ of a total thickness of the backing plate and formed from an anticorrosive metal obtained by bonding one or more types of metals selected from among Cu, Al and Ti, or an alloy thereof. Additionally provided is a sputtering target-backing plate assembly obtained by bonding the foregoing Mo or Mo alloy backing plate and a target formed from a low thermal expansion material.Particularly in semiconductor applications, reductions in size have progressed and control of particles during sputtering has become stricter. The present invention aims to resolve the problem of warpage of sputtering targets formed from low thermal expansion materials and problems occurring with respect to the anticorrosive properties of Mo or Mo alloy backing plates.