Patent ID: 6265247
Filing Date: 2001-07-24
Classification: H01L,Y10S

Abstract:
A manufacturing method for a thin-film transistor comprising:a first process for forming a gate electrode on one principal plane of a substrate;a second process for forming a gate insulating film so as to cover said gate electrode on said substrate, and forming a semiconductor film on said gate insulating film;a third process for forming in sequence a first silicon oxide film, a silicon nitride film and a second silicon oxide film on said semiconductor film to form a layer insulating film;a fourth process for forming a contact hole through said layer insulating film so as to reach said semiconductor film; anda fifth process for forming an electrode to be connected to said semiconductor film through said contact hole;said fourth process successively etching said first silicon oxide film, said silicon nitride film and said second silicon oxide film in an isotropic manner.