The invention provides a manufacturing method for a target material
assembly. The manufacturing method for the target material
assembly includes the steps that surface infiltration treatment is carried out on a
welding surface of a back plate through
indium solder; a
welding surface of a target material is coated with
indium solder and is rubbed through a steel wire hairbrush, so that surface infiltration treatment is carried out; and the
welding surface, subjected to surface infiltration treatment, of the target material and the welding surface of the back plate are welded together. Through the step of
rubbing the welding surface of the target material through the steel wire hairbrush,
metal oxide on the welding surface of the target material can be removed, the roughness of the welding surface of the target material is increased, and accordingly the
indium solder can fully infiltrate the welding surface of the target material. After the welding surfaces of the target material and the back plate are welded, the bonding performance of the welding surfaces of the target material and the back plate is high, and defects are not prone to occurrence. The target material and the back plate are both infiltrated through the indium solder, the bonding performance of the indium solder is high, the total use amount of the indium solder is smaller compared with that in the prior art, and the recycling purity of the indium solder is improved.