Patent ID: 11946142
Assignee: LAM RESEARCH CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H | IPC C

Claim 14:
15. A showerhead pedestal (ShoPed) for use in a plasma processing chamber for depositing films on an underside surface of a wafer, comprising:
an inner plenum configured to receive a volume of process gas;
a set of outlets defined on a top surface of the ShoPed and configured to interface with the inner plenum to provide the process gas for depositing a film;
a masking plate disposed over the top surface of the ShoPed, the masking plate including a first area that includes openings and a second area that is masked,
wherein the first area of the masking plate is configured to provide the process gas to a portion of the underside surface of the wafer for depositing the film.