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摘要:
A method for improving uniformity of high-frequency discharge plasma in a frequency modulation manner. In a plasma discharge chamber (1), for a pair of parallel electrodes (2), a high-frequency power supply (3) is adopted to feed power to the electrodes, the frequency range of the electromagnetic field being between 13.56 MHz and 160 MHz. A discharge gas is filled to form plasma. The frequency fed to the high-frequency electromagnetic field is controlled through automatic tuning. During the plasma discharge, the frequency thereof keeps changing cyclically, the change range of the frequency is a part contained inside 13.56 MHz to 160MHz, or is the entire range between 13.56 MHz and 160 MHz, so that cyclic change occurs at a position with high plasma density on a plane parallel to the electrodes in a plasma discharge space. In the time period of more than one frequency change cycle, the average plasma density between the parallel electrodes is uniform.
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专利类型: 发明申请
申请(专利)号: WOCN12076756
申请日期: 2012-06-12
公开(公告)日: 2013-10-31
公开(公告)号: WO2013159433A1
申请(专利权): BEIJING;UNIVERSITY;OF;TECHNOLOGY;;WANG;Bo;;XU;Lichun;;ZHANG;Ming;;WANG;Ruzhi;;SONG;Xuemei;;HOU;Yudong;;ZHU;Mankang;;LIU;Jingbing;;WANG;Hao;;YAN;Hui
法律状态: 进入国家阶段-PCT有效期满