Patent ID: 8734896
Filing Date: 2014-05-27
Classification: B05D,B23K,C23C,H01J,Y10T

Abstract:
1. A method of forming a joined sputtering target comprising a sputtering material, the method comprising: disposing two discrete sputtering-target tiles comprising the sputtering material proximate each other, thereby forming an interface between the tiles, the interface comprising at least one of an interlocking joint therein or a recess in a top surface thereof; spray-depositing a spray material over at least a portion of the interface, thereby joining the tiles to form the joined sputtering target, the joined sputtering target having a residual stress after the spray-deposition of the spray material; after spray-depositing the spray material, annealing the joined sputtering target at an annealing temperature, whereby the residual stress is reduced or substantially eliminated; and after annealing, attaching the joined sputtering target to a backing plate with a joining compound, at least one of the backing plate or the joining compound having a melting point lower than the annealing temperature.