CHARGE NEUTRALIZATION IN A PLASMA PROCESSING APPARATUS
    11.
    发明申请
    CHARGE NEUTRALIZATION IN A PLASMA PROCESSING APPARATUS 审中-公开
    等离子体处理装置中的充电中和

    公开(公告)号:US20090084987A1

    公开(公告)日:2009-04-02

    申请号:US11863728

    申请日:2007-09-28

    IPC分类号: A61N5/00

    摘要: A plasma processing apparatus includes a process chamber, a source configured to generate a plasma in the process chamber, and a platen configured to support a workpiece in the process chamber. The platen is biased with a pulsed platen signal having pulse ON and OFF time periods to accelerate ions from the plasma towards the workpiece during the pulse ON time periods and not the pulse OFF time periods. A plate is positioned in the process chamber. The plate is biased with a plate signal to accelerate ions from the plasma towards the plate to cause an emission of secondary electrons from the plate during at least a portion of one of the pulse OFF time periods of the pulsed platen signal to at least partially neutralize charge accumulation on the workpiece.

    摘要翻译: 等离子体处理装置包括处理室,被配置为在处理室中产生等离子体的源和被构造成在处理室中支撑工件的压板。 压板由具有脉冲ON和OFF时间段的脉冲压板信号偏置,以在脉冲接通时间段期间将离子从等离子体加速到工件,而不是脉冲关闭时间周期。 板位于处理室中。 板被板信号偏置,以将离子从等离子体加速到板,以在脉冲压板信号的脉冲关闭时间周期的至少一部分的至少一部分期间引起来自板的二次电子的发射,以至少部分中和 电荷积累在工件上。