Patent ID: 8944095
Filing Date: 2015-02-03
Classification: C23C,G05D,Y10T

Abstract:
1. A gas supply apparatus for supplying a gas to a plurality of processing reactors of a semiconductor manufacturing apparatus, comprising: a plurality of gas supply sources; gas introduction pipes respectively connected to the gas supply sources; a main gas pipe into which the gas introduction pipes converge; branch pipes branching off the main gas pipe and respectively connected to the processing reactors; and a pressure type flow controller provided for the main gas pipe and the branch pipes, wherein the pressure type flow controller includes a pressure detector, a temperature sensor and a flow detecting thermal sensor provided in the main gas pipe, a control valve provided in each of the branch pipes, an orifice provided downstream or upstream of the control valve in each of the branch pipes, a first arithmetic circuit for determining a flow rate Qc=KP