Measuring device and method of obtaining thickness of sheath

    公开(公告)号:US11898840B2

    公开(公告)日:2024-02-13

    申请号:US17356230

    申请日:2021-06-23

    Inventor: Shinji Kubota

    CPC classification number: G01B7/085 H01J37/3222 H01J37/32816

    Abstract: A measuring device includes a substrate disposed on a substrate support of a plasma processing apparatus, a transmission circuit, a transmitting antenna, a receiving antenna, a reception demodulation circuit, and a calculator which are provided in the substrate. The transmission circuit generates a microwave. The transmitting antenna transmits the microwave generated by the transmission circuit as a transmission wave. The receiving antenna receives a reflected wave of the transmission wave by plasma above the substrate support as at least one reception wave. The reception demodulation circuit generates a signal that reflects a thickness of a sheath between the substrate and the plasma, from the reception wave. The calculator obtains the thickness of the sheath from the signal generated by the reception demodulation circuit.

    Dynamic pressure control for processing chambers implementing real-time learning

    公开(公告)号:US11869754B2

    公开(公告)日:2024-01-09

    申请号:US16563352

    申请日:2019-09-06

    Abstract: System and methods of improving dynamic pressure response during recipe step transitions. An exemplary method may include changing at least one of a plurality of recipe parameters in accordance with a processing recipe while running the processing recipe on a semiconductor substrate in a processing chamber. The method may further include measuring a pressure response in the processing chamber responsive to the changing of the at least one of the plurality of recipe parameters, and determining a response error based on the pressure response and a model pressure response calculated based on the processing recipe. The method may further include, in response to determining that the response error may be greater than a threshold value, calculating an adjustment to an operation of a valve downstream of the processing chamber when changing the at least one of the plurality of recipe parameters in accordance with the processing recipe in subsequent runs.

Patent Agency Ranking