Patent ID: 7682843
Filing Date: 2010-03-23
Classification: C23C,G05D

Abstract:
1. A method of correcting a flow rate for a semiconductor fabrication apparatus that performs a substrate process on a substrate in a processing unit for manufacturing a semiconductor device by supplying a gas to the processing unit, by using a flow rate controller that compares an output voltage of a detection unit for detecting a gas flow rate of a gas supply passage with a set voltage that corresponds to a set flow rate set in advance, and controls the gas flow rate of the gas supply passage to be the set flow rate, the method comprising: a zero point shift detection step of, before the substrate process is performed, detecting an output voltage of the flow rate controller in a state where an atmosphere in the flow rate controller is replaced with a processing gas used for the substrate process and each of stop valves respectively installed in an upstream and a downstream side of the flow rate controller is closed, and storing the output voltage as a zero point shift in a storage unit; and a zero point shift correction step of, when the substrate process is performed, correcting the set voltage to correspond to a gas flow rate of the processing gas used for the substrate process based on the zero point shift of the flow rate controller stored in the storage unit, and setting the corrected set voltage in the flow rate controller.