Patent ID: 8968536
Filing Date: 2015-03-03
Classification: C23C,H01J,H04L

Abstract:
1. A sputtering target for a sputtering chamber, the sputtering target comprising: (a) a backing plate of a first material, the backing plate comprising a circular plate having a front surface and a back surface, the front surface comprising an annular groove that is shaped and sized to correspond to a predetermined region of higher target erosion relative to adjacent target area; (b) a sputtering plate of a second material comprising sputtering material that is different from the first material, the sputtering plate mounted on the backing plate, the sputtering plate comprising a disk comprising a sputtering surface and a backside surface having a circular ridge that is shaped and sized to fit into the annular groove, the circular ridge composed of the sputtering material; and (c) a ring of a third material that is different from the first and second materials, the ring resting in the annular groove without being attached to the groove.