CARBON NANOTUBE ELECTROSTATIC CHUCK

    公开(公告)号:US20210225682A1

    公开(公告)日:2021-07-22

    申请号:US16749336

    申请日:2020-01-22

    Abstract: A platen having improved thermal conductivity and reduced friction is disclosed. In one embodiment, vertically aligned carbon nanotubes are grown on the top surface of the platen. The carbon nanotubes have excellent thermal conductivity, thus improving the transfer of heat between the platen and the workpiece. Furthermore, the friction between the carbon nanotubes and the workpiece is much lower than that with conventional embossments, reducing particle generation. In another embodiment, a support plate is disposed on the platen, wherein the carbon nanotubes are disposed on the top surface of the support plate.

    System and method for dissipating workpiece charge build up

    公开(公告)号:US11864299B2

    公开(公告)日:2024-01-02

    申请号:US17740859

    申请日:2022-05-10

    CPC classification number: H05F3/06

    Abstract: A system and method for reducing charge on a workpiece disposed on a platen is disclosed. The system includes an ionizer to generate ionized gas from the source of backside gas. The ionizer may be used to introduce ionized gas into the backside gas channels of the platen. A controller is used to selectively allow backside gas and/or ionized gas into the backside gas channels. In certain embodiments, the platen also includes an exhaust channel in communication with an exhaust valve to ensure that the pressure within the volume between the top surface of the platen and the workpiece is maintained in a desired range. In one embodiment, the system includes a valving system in communication with the source of backside gas and also in communication with the ionizer. In another embodiment, the amount of ionization performed by the ionizer is programmable.

    SYSTEM AND METHOD FOR DISSIPATING WORKPIECE CHARGE BUILD UP

    公开(公告)号:US20230371160A1

    公开(公告)日:2023-11-16

    申请号:US17740859

    申请日:2022-05-10

    CPC classification number: H05F3/06

    Abstract: A system and method for reducing charge on a workpiece disposed on a platen is disclosed. The system includes an ionizer to generate ionized gas from the source of backside gas. The ionizer may be used to introduce ionized gas into the backside gas channels of the platen. A controller is used to selectively allow backside gas and/or ionized gas into the backside gas channels. In certain embodiments, the platen also includes an exhaust channel in communication with an exhaust valve to ensure that the pressure within the volume between the top surface of the platen and the workpiece is maintained in a desired range. In one embodiment, the system includes a valving system in communication with the source of backside gas and also in communication with the ionizer. In another embodiment, the amount of ionization performed by the ionizer is programmable.

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