Patent ID: 6579431
Filing Date: 2003-06-17
Classification: B23K,C23C,Y10T

Abstract:
In the preparation of a sputter target/backing plate assembly from a sputter target having a first mating surface and a backing plate having a second mating surface, an improved method for joining said sputter target and said backing plate along said first and second mating surfaces wherein said sputter target is composed of a first metallic material and said backing plate is composed of a second metallic material selected from the group consisting of aluminum, aluminum alloy and aluminum matrix composite materials; the improvement comprising steps of:a) forming a plurality of salient portions on at least one of said first and second mating surfaces; b) electroplating an intermediate layer comprising nickel on at least one of said first and second mating surfaces; and c) in a single stage pressing said sputter target and said backing plate together along said first and second mating surfaces at a temperature just below a melting point of the sputter target and backing plate to form a diffusion bond thereby joining said sputter target and said backing plate.