Patent ID: 11929270
Assignee: nan
Field: Measurement (Instruments)
Classification: CPC H  C  G | IPC C  G  H

Claim 20:
21. A method for monitoring a fabrication process in a fabrication system, the fabrication system comprising a process chamber and a plurality of flow components, and the method comprising:
deploying a quartz crystal microbalance (QCM) sensor for monitoring one flow component of the plurality of flow components of the fabrication system;
accumulating a material layer on the QCM sensor in situ during the fabrication process;
exposing the QCM sensor to a process chemistry in the one flow component during the fabrication process;
measuring resonance frequency shifts of the QCM sensor due to interactions between the material layer of the QCM sensor and the process chemistry in the one flow component during the fabrication process; and
determining a parameter of the fabrication process in the process chamber as a function of the measured resonance frequency shifts of the QCM sensor within the one flow component
wherein the fabrication process comprises accumulating a material layer on a substrate, wherein the material layer on the substrate is the same material as the material layer of the QCM sensor.