Patent ID: 7409864
Filing Date: 2008-08-12
Classification: G01L

Abstract:
1. A substrate processing apparatus for processing a substrate, comprising: a process bath for storing a processing liquid, in which substrates are dipped; and a processing liquid supplying part for supplying a processing liquid to said process bath, wherein said processing liquid supplying part comprises a pressure sensor for measuring pressure of a processing liquid supplied to said process bath, and said pressure sensor comprises a pressure chamber filled with fluid whose pressure is to be measured; a thin-plate diaphragm which is elastically deformed according to pressure of fluid in said pressure chamber, a part of said diaphragm, which is in contact with said fluid, being made of silicon carbide, glassy carbon, or diamond; a detection mechanism for detecting an amount of deformation of said diaphragm; and an operation part for storing conversion information representing a relationship between an amount of deformation of said diaphragm and pressure of said fluid, and obtaining pressure of said fluid on the basis of said conversion information and an amount of deformation of said diaphragm detected by said detection mechanism.