CONTROL OF STEAM GENERATION FOR CHEMICAL MECHANICAL POLISHING

    公开(公告)号:US20230415297A1

    公开(公告)日:2023-12-28

    申请号:US18465519

    申请日:2023-09-12

    CPC classification number: B24B37/015 B24B37/042

    Abstract: A chemical mechanical polishing system includes a steam generator with a heating element to apply heat to a vessel to generate steam, an opening to deliver steam onto a polishing pad, a first valve in a fluid line between the opening and the vessel, a sensor to monitor a steam parameter, and a control system. The control system causes the valve to open and close in accordance with a steam delivery schedule in a recipe, receive a measured value for the steam parameter from the sensor, receive a target value for the steam parameter, and perform a proportional integral derivative control algorithm with the target value and measured value as inputs so as to control the first valve and/or a second pressure release valve and/or the heating element such that the measured value reaches the target value substantially just before the valve is opened according to the steam delivery schedule.

    CONTROL OF STEAM GENERATION FOR CHEMICAL MECHANICAL POLISHING

    公开(公告)号:US20210402554A1

    公开(公告)日:2021-12-30

    申请号:US17360907

    申请日:2021-06-28

    Abstract: A chemical mechanical polishing system includes a steam generator with a heating element to apply heat to a vessel to generate steam, an opening to deliver steam onto a polishing pad, a first valve in a fluid line between the opening and the vessel, a sensor to monitor a steam parameter, and a control system. The control system causes the valve to open and close in accordance with a steam delivery schedule in a recipe, receive a measured value for the steam parameter from the sensor, receive a target value for the steam parameter, and perform a proportional integral derivative control algorithm with the target value and measured value as inputs so as to control the first valve and/or a second pressure release valve and/or the heating element such that the measured value reaches the target value substantially just before the valve is opened according to the steam delivery schedule.

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