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    • 18. 发明申请
    • Asymmetrical RF Drive for Electrode of Plasma Chamber
    • 等离子室电极的非对称RF驱动
    • US20090159423A1
    • 2009-06-25
    • US12343519
    • 2008-12-24
    • Jozef KudelaCarl A. SorensenSoo Young ChoiJohn M. White
    • Jozef KudelaCarl A. SorensenSoo Young ChoiJohn M. White
    • H05H1/00H01L21/3065B23H7/14
    • H01L21/02B44C1/227C23C16/513H01J37/32091H01J37/32577H01L21/02104
    • RF power is coupled to one or more RF drive points (50-56) on an electrode (20-28) of a plasma chamber such that the level of RF power coupled to the RF drive points (51-52, 55-56) on the half (61) of the electrode that is closer to the workpiece passageway (12) exceeds the level of RF power coupled to the RF drive points (53-54), if any, on the other half (62) of the electrode. Alternatively, RF power is coupled to one or more RF drive points on an electrode of a plasma chamber such that the weighted mean of the drive point positions is between the center (60) of the electrode and the workpiece passageway. The weighted mean is based on weighting each drive point position by the time-averaged level of RF power coupled to that drive point position. The invention offsets an increase in plasma density that otherwise would exist adjacent the end of the electrode closest to the passageway.
    • RF功率耦合到等离子体室的电极(20-28)上的一个或多个RF驱动点(50-56),使得耦合到RF驱动点(51-52,55-56)的RF功率的电平 更靠近工件通道(12)的电极的一半(61)超过了电极的另一半(62)上耦合到RF驱动点(53-54)的RF功率的水平(如果有的话) 。 或者,RF功率耦合到等离子体室的电极上的一个或多个RF驱动点,使得驱动点位置的加权平均值在电极的中心(60)和工件通道之间。 加权平均值基于通过耦合到该驱动点位置的RF功率的时间平均水平来加权每个驱动点位置。 本发明抵消等离子体密度的增加,否则其将邻近电极最靠近通道的端部存在。