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    • 24. 发明授权
    • Wafer polishing head
    • 晶圆抛光头
    • US5803799A
    • 1998-09-08
    • US879862
    • 1997-06-20
    • Konstantin VolodarskyDavid E. Weldon
    • Konstantin VolodarskyDavid E. Weldon
    • B24B37/30B24B5/00B24B29/00
    • B24B37/30
    • A polishing head for polishing a semiconductor wafer includes a housing, a wafer carrier movably mounted to the housing, and a wafer retainer movably mounted to the housing. The wafer carrier forms a wafer supporting surface, and the wafer retainer is shaped to retain a wafer in place on the wafer-supporting surface. A first fluid actuator is coupled to the wafer carrier to bias the wafer carrier in a selected direction with respect to the housing, and a second fluid actuator is coupled to the wafer retainer to bias the wafer retainer in a second selected direction with respect to the housing. First and second fluid conduits are coupled to the first and second actuators, respectively, such that fluid pressures in the first and second actuators are separately and independently adjustable with respect to one another. Biasing forces on the retainer can thereby be dynamically adjusted with respect to biasing forces on the carrier during the polishing operation.
    • 用于抛光半导体晶片的抛光头包括壳体,可移动地安装到壳体的晶片载体和可移动地安装到壳体的晶片保持架。 晶片载体形成晶片支撑表面,并且晶片保持器成形为将晶片保持在晶片支撑表面上的适当位置。 第一流体致动器耦合到晶片载体,以相对于壳体在选定的方向上偏置晶片载体,并且第二流体致动器耦合到晶片保持器,以将晶片保持器相对于第二选定方向偏置 住房。 第一和第二流体管道分别联接到第一和第二致动器,使得第一和第二致动器中的流体压力彼此独立且可独立地调节。 因此,可以在抛光操作期间相对于载体上的偏压力动态地调节保持器上的偏压力。