Patent ID: 11935732
Assignee: APPLIED MATERIALS, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 14:
15. An apparatus for processing a substrate, comprising:
a process chamber having a process cavity and a chamber body cavity;
a substrate support disposed in the process cavity;
a target disposed in the process cavity opposite the substrate support;
a process kit located about the substrate support and the target, the process kit comprising:
a shield encircling the target, the shield comprising:
a cylindrical band having a top wall that surrounds the target and a bottom wall that surrounds the substrate support;
a sloped wall that extends radially inward from the bottom wall of the cylindrical band, the sloped wall having a substantially straight profile; and
at least one gas hole located on a lower portion of the sloped wall to allow process gas to pass therethrough;, and
a ring assembly comprising:
a cover ring located about the substrate support, the cover ring comprising:
an annular wedge comprising an inclined top surface about the substrate support, the inclined top surface having an inner and outer periphery;
a bulb-shaped protuberance about the outer periphery of the inclined top surface;
a footing extending downward from the inclined top surface, a projecting brim about the inner periphery of the inclined top surface; and
inner and outer cylindrical bands extending downward from the annular wedge;

wherein the at least one gas hole is located on the lower portion of the sloped wall such that the bulb-shaped protuberance of the cover ring blocks a line-of-sight between the at least one gas hole on the shield and an entrance to the chamber body of the process chamber.