Patent ID: 8117986

Claim:
A deposition shield comprising: a cylinder configured to surround a process space in a plasma processing system, said cylinder comprising: a first sidewall surface defining an interior of the cylinder, a second sidewall surface opposing the first sidewall surface and defining an exterior of the cylinder, a first end surface extending radially outward from the first sidewall surface to the second sidewall surface, the first end surface extending circumferentially around a complete circumference of the cylinder, and a second end surface opposing the first end surface and extending radially outward from the first sidewall surface to the second sidewall surface, the second end surface extending circumferentially around a complete circumference of the cylinder; and a protective coating provided on said first sidewall surface, on at least a portion of said first end surface, and on at least a portion of said second end surface, said coating comprising yttrium or dysprosium or a combination thereof.