PLASMA PROCESSING APPARATUS
    5.
    发明公开

    公开(公告)号:US20240347325A1

    公开(公告)日:2024-10-17

    申请号:US18750539

    申请日:2024-06-21

    IPC分类号: H01J37/32 H01L21/683

    摘要: A plasma processing apparatus includes: a stage having first and second placement surfaces; an elevating mechanism for raising and lowering a ring member on the second placement surface with respect to the second placement surface; a radio-frequency power source; and a controller for executing a cleaning process including an operation of separating the second placement surface and the ring member from each other by the elevating mechanism; and an operation of removing deposits accumulated on the stage and the ring member by supplying radio-frequency power from the radio-frequency power source to the stage to generate plasma. In the separation operation, a distance between the second placement surface and the ring member is set such that a density of plasma generated in a region between an outer edge of the first placement surface and a lower surface of the ring member is higher than that of plasma generated in other regions.

    PLASMA ETCHING APPARATUS AND PLASMA ETCHING METHOD

    公开(公告)号:US20240331986A1

    公开(公告)日:2024-10-03

    申请号:US18616526

    申请日:2024-03-26

    发明人: Yasunobu SUZUKI

    IPC分类号: H01J37/32 H01L21/3065

    摘要: A plasma etching apparatus includes: a chamber, a support body provided inside the chamber to hold a substrate, a plasma generator provided with a plasma source to generate plasma, and a controller. The support body has a placement surface on which the substrate is placed, rotates the substrate about a perpendicular line passing through a center of the substrate, and is configured such that the placement surface is tilted with respect to a horizontal plane and the perpendicular line passes through a center of the plasma source only when the placement surface is not tilted with respect to the horizontal plane. The controller performs control so that during plasma etching, the placement surface is tilted with respect to the horizontal plane and the substrate is rotated about the perpendicular line, and control so that a total number of rotations of the substrate about the perpendicular line becomes a predetermined value.

    ELECTROSTATIC CHUCK
    7.
    发明公开
    ELECTROSTATIC CHUCK 审中-公开

    公开(公告)号:US20240331985A1

    公开(公告)日:2024-10-03

    申请号:US18610491

    申请日:2024-03-20

    申请人: TOTO LTD.

    摘要: An electrostatic chuck includes: a dielectric substrate in which a through hole is formed; an RF electrode which is embedded inside the dielectric substrate; and an attracting electrode which is embedded inside the dielectric substrate at a position that is closer to a placement surface than the RF electrode. When viewed from a direction perpendicular to the placement surface, a circular first opening which is concentric with the through hole and which includes the through hole is formed in the attracting electrode and a circular second opening which is concentric with the through hole and which includes the through hole is formed in the RF electrode. A radius of the second opening is larger than a radius of the first opening.

    Member for semiconductor manufacturing apparatus

    公开(公告)号:US12087610B2

    公开(公告)日:2024-09-10

    申请号:US17809567

    申请日:2022-06-29

    IPC分类号: H01L21/683 H01J37/32

    摘要: A member for semiconductor manufacturing apparatus includes a ceramic plate that has an upper surface including a wafer placement surface and that contains an electrode; a plug insertion hole that is formed as at least a portion of a through-hole extending through the ceramic plate in an up-down direction, an internal thread portion being on an inner circumferential surface around the plug insertion hole; and an insulating plug that includes an external thread portion screwed on the internal thread portion on an outer circumferential surface and that allows gas to pass therethrough.