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    • 77. 发明授权
    • Method for preventing an electrostatic chuck from being corroded during a cleaning process
    • 防止静电卡盘在清洗过程中被腐蚀的方法
    • US06261977B1
    • 2001-07-17
    • US09391357
    • 1999-09-08
    • Cheng-Yuan TsaiChih-Chien LiuJuan-Yuan Wu
    • Cheng-Yuan TsaiChih-Chien LiuJuan-Yuan Wu
    • H01L21324
    • H01L21/67069H01L21/6831H01L21/6833Y10S438/905Y10S438/906Y10S438/907
    • The present invention relates to a method for preventing an electrostatic chuck positioned at the bottom of a plasma vacuum chamber from being corroded during a cleaning process. The electrostatic chuck comprises a conductive substrate functioned as a lower electrode in a plasma process, and an insulating layer on the conductive substrate to electrically isolate the semiconductor wafer and the conductive substrate. The cleaning process involves a plasma process in which a fluorine-contained gas is injected into the plasma vacuum chamber to remove the chemical layer on the inner wall of the plasma vacuum chamber. A ceramic shutter made of SiC material is reposed on the electrostatic chuck and a high DC voltage is applied to the conductive substrate and the ceramic shutter which causes the ceramic shutter and the electrostatic chuck tightly stick together due to an electrostatic reaction. By doing so, the fluorine-contained gas cannot corrode the insulating layer under the ceramic shutter through the gap between the ceramic shutter and the electrostatic chuck.
    • 本发明涉及一种防止位于等离子体真空室底部的静电卡盘在清洗过程中被腐蚀的方法。 静电卡盘包括在等离子体工艺中用作下电极的导电基板和导电基板上的绝缘层,以电绝缘半导体晶片和导电基板。 清洗过程涉及等离子体处理,其中将含氟气体注入到等离子体真空室中以除去等离子体真空室的内壁上的化学层。 由SiC材料制成的陶瓷快门被放置在静电卡盘上,并且高导电性基板和陶瓷快门上施加高的直流电压,导致陶瓷快门和静电卡盘由于静电反应紧紧地粘在一起。 通过这样做,含氟气体不能通过陶瓷快门和静电卡盘之间的间隙腐蚀陶瓷快门下面的绝缘层。