Patent ID: 9534286
Date: 2017-01-03
CPC Classifications: C23C,H01J,Y10T

Claim:
1. A target assembly for use in a substrate processing chamber having a process shield, the target assembly comprising: a backing plate having a first side and an opposing second side, wherein the second side comprises a first surface having a first diameter bounded by a first edge; a target material having a first side bonded to the first surface of the backing plate; wherein the first edge is an interface between the backing plate and the target material; and three slots disposed along an outer periphery of the backing plate to align the target assembly with respect to the process shield during use, wherein the three slots are formed in the first side of the backing plate and extend only partially into the backing plate, wherein a center of a first slot is located at a first angle of about 115 degrees from a center of a second slot, the center of the second slot is located at a second angle of about 115 degrees from the center of a third slot, and the center of the first slot is located at a third angle of about 130 degrees from the center of the third slot, and wherein the third angle is greater than each of the first and second angles.