Lam Research Corporation
SURFACE COATING TREATMENT

Abstract:

A component for use as part of a plasma processing chamber is provided. The component has a component body adapted for use as part of a plasma processing chamber. A first ceramic coating of a ceramic material is on a surface of the component body, wherein the first ceramic coating has a first side adjacent to the component body and a second side spaced apart from the component body and wherein the first ceramic coating has a porosity and density. A second ceramic coating of the ceramic material is on the second side of the first ceramic coating, wherein the second ceramic coating has a porosity that is less than the porosity of the first ceramic coating and the second ceramic coating has a density that is greater than the density of the first ceramic coating.