Patent ID: 7195546
Filing Date: 2007-03-27
Classification: B24B,H01L

Abstract:
1. A polishing apparatus, comprising: a pressure vessel having a lid which opens or closes said pressure vessel; a polishing plate being provided in said pressure vessel; a pressing plate being provided on said polishing plate, said pressing plate pressing a work piece, which has been set between said polishing plate and said pressing plate, onto said polishing plate; a driving unit moving said polishing plate relative to said pressing plate so as to polish the work piece; a gas supplying source being connected to said pressure vessel, said gas supplying source supplying an alkaline gas or an acid gas into said pressure vessel; a gas discharging section discharging the supplied gas from said pressure vessel; and a pure water supplying unit supplying pure water onto said polishing plate; and a pH detecting unit for detecting the pH value of the pure water, wherein