Patent ID: 6869810
Filing Date: 2005-03-22
Classification: H01L,Y10S

Abstract:
1. A manufacturing method of a semiconductor device, comprising the steps of: forming a metal wire on a circuit formed on a semiconductor substrate; forming an insulating film on the metal wire; forming a via hole in the insulating film so as to expose a surface of the metal wire by selectively etching the insulating film by a plasma dry etching method; measuring a first level difference between the surface of the metal wire and the surface of the insulating film by a non-contact measurement method; removing a metal oxide film located on the surface of the metal film by cleaning the surface of the metal film; measuring a second level difference between the surface of the metal film and the surface of the insulating film by a non-contact measurement method; and determining an amount of oxidation of the metal wire from a difference between the first level difference and the second level difference.