Patent ID: 9257562
Filing Date: 2016-02-09
CPC Classification: H01L

Claim Text:
1. A method for manufacturing a semiconductor device comprising the steps of: forming a silicon nitride oxide film over a glass substrate; forming an oxide insulating film over the silicon nitride oxide film; and forming an amorphous semiconductor film over the oxide insulating film; performing a heat treatment on the silicon nitride oxide film, the oxide insulating film and the amorphous semiconductor film; and forming a crystalline semiconductor film by irradiating the amorphous semiconductor film with a pulsed laser beam, wherein the amorphous semiconductor film comprises silicon, wherein total stress of the silicon nitride oxide film, the oxide insulating film and the amorphous semiconductor film is −150 N/m to 0 N/m after the heat treatment, wherein the silicon nitride oxide film is formed by using a source gas comprising SiH wherein the silicon nitride oxide film includes more nitrogen than oxygen.