Patent ID: 8597478

Claim:
A method for manufacturing a sputtering target structure by bonding a sputtering target and a backing plate, wherein the backing plate is formed of a material that has a linear expansion coefficient different from that of the sputtering target material by at most 2×10 −6 /K, wherein a copper plate having a thickness of from 0.3 to 1.5 mm is disposed on at least one face of the backing plate, and wherein the backing plate has a cooling channel made of copper or stainless steel pipes running therethrough, the method comprising: forming the backing plate by subjecting a mold containing copper or stainless steel pipes and a reinforcing material to heat treatment to obtain a sintered body of the reinforcing material integrally formed with a cooling channel made of the pipes running therethrough, fitting a copper plate to the sintered body of the reinforcing material, putting the sintered body of the reinforcing material with the copper plate fitted thereto in a pressure casting mold, and casting aluminum melt into the mold followed by solidification under pressure; and boding the sputtering target to the formed backing plate.