PROCESS KIT GEOMETRY FOR PARTICLE REDUCTION IN PVD PROCESSES

    公开(公告)号:WO2019147493A1

    公开(公告)日:2019-08-01

    申请号:PCT/US2019/014207

    申请日:2019-01-18

    Abstract: A process kit comprises a shield and ring assembly for positioning about a substrate support in a processing chamber to reduce deposition of process deposits on internal chamber components and an overhang edge of the substrate. The shield comprises a cylindrical band having a top wall configured to surround a sputtering target and a sloped portion of a bottom wall having a substantially straight profile with gas conductance holes configured to surround the substrate support. The ring assembly comprises a cover ring having a bulb-shaped protuberance about the periphery of the ring. The bulb-shaped protuberance of the cover ring is able to block a line-of-sight between the gas conductance holes on the shield and an entrance to a chamber body cavity in the processing chamber.

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