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    • 21. 发明申请
    • Technique for monitoring and controlling a plasma process
    • 监测和控制等离子体工艺的技术
    • US20070210248A1
    • 2007-09-13
    • US11371907
    • 2006-03-10
    • Bon-Woong KooLudovic GodetVassilis VourloumisVikram SinghZiwei Fang
    • Bon-Woong KooLudovic GodetVassilis VourloumisVikram SinghZiwei Fang
    • H01J49/40
    • H01J49/40H01J37/32935
    • An in-situ ion sensor is disclosed for monitoring ion species in a plasma chamber. The ion sensor may comprise: a drift tube; an extractor electrode and a plurality of electrostatic lenses disposed at a first end of the drift tube, wherein the extractor electrode is biased to attract ions from a plasma in the plasma chamber, and wherein the plurality of electrostatic lenses cause at least one portion of the attracted ions to enter the drift tube and drift towards a second end of the drift tube within a limited divergence angle; an ion detector disposed at the second end of the drift tube, wherein the ion detector detects arrival times associated with the at least one portion of the attracted ions; and a housing for the extractor, the plurality of electrostatic lenses, the drift tube, and the ion detector, wherein the housing accommodates differential pumping between the ion sensor and the plasma chamber.
    • 公开了用于监测等离子体室中的离子种类的原位离子传感器。 离子传感器可以包括:漂移管; 提取器电极和设置在漂移管的第一端处的多个静电透镜,其中所述提取器电极被偏置以从所述等离子体室中的等离子体吸引离子,并且其中所述多个静电透镜引起所述静电透镜的至少一部分 吸引离子进入漂移管并在有限的发散角内漂移到漂移管的第二端; 设置在所述漂移管的第二端处的离子检测器,其中所述离子检测器检测与所述吸引离子的所述至少一部分相关联的到达时间; 以及用于提取器,多个静电透镜,漂移管和离子检测器的壳体,其中壳体容纳离子传感器和等离子体室之间的差分泵浦。