QUARTZ CRYSTAL MICROBALANCE CONCENTRATION MONITOR

    公开(公告)号:WO2021222721A1

    公开(公告)日:2021-11-04

    申请号:PCT/US2021/030122

    申请日:2021-04-30

    Abstract: Describe is a quartz crystal microbalance (QCM) device mounted within a heated sample chamber. The sample chamber temperature is maintained about 10°C to about 30°C greater than the temperature of the precursor vessel. The sample chamber is connected to the precursor delivery line and includes a high temperature valve and a flow pathway to foreline with a high temperature valve to permit removal of excess material. The QCM device includes a heater and gas cooling channel allowing the device to be maintained at a temperature about 10°C to about 30°C less than the temperature of the precursor vessel.

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