Patent ID: 7381293
Filing Date: 2008-06-03
Classification: H01L,Y10S,Y10T

Abstract:
1. An insert ring for a process chamber to reduce material accumulations on an inner surface thereof, comprising: an insert ring body comprising an inner diameter surface defining a central opening, said insert ring body positioned on a shadow ring to surround a substrate support to form a gap there between; wherein, said inner diameter surface comprises a convex tapered geometry, said convex tapered geometry comprising at least two planar faces to form respective upper and lower tapered surfaces, said upper and lower tapered surfaces intersecting adjacent to said substrate support to form an angled corner defining a narrow most portion of said gap. wherein said upper and lower tapered surfaces each form an angle of about 20 degrees to about 24 degrees with respect to a vertical direction parallel to said outer diameter of said substrate support.