Patent ID: 6989281
Filing Date: 2006-01-24
Classification: H01L

Abstract:
1. A cleaning method for a semiconductor device manufacturing apparatus, comprising: taking out a subject piece and a film thereon from a processing chamber, after film formation is performed on said subject piece in said processing chamber, the processing chamber including at least one of said subject piece; applying said light having a predetermined wavelength to a monitoring section which is provided at a tip of at least one monitoring device to indirectly monitor a thickness of a film formed on said subject piece, while said light is isolated from an atmosphere in said processing chamber and a substance in said processing chamber, and introducing cleaning gas capable of removing a substance deposited on said monitoring section into said processing chamber; measuring a reflection light which is said application light reflected near said monitoring section, while said reflection light is isolated from said atmosphere in said processing chamber and said substance introduced into said processing chamber; measuring an amount of a substance corresponding to a thickness of a film deposited on said monitoring section based on a measurement result of said reflection light; and introducing, into said processing chamber, a cleaning gas which can remove the substance on said monitoring section until a measurement value of the amount of said substance on said monitoring section becomes 0.