Patent ID: 6632711
Filing Date: 2003-10-14
Classification: H01L

Abstract:
A process for producing a thin film semiconductor device comprisinga film forming step of forming a semiconductor thin film comprising an amorphous material or a polycrystalline material having a relatively small particle diameter on a substrate; an irradiation step of irradiating said semiconductor thin film with an energy beam to convert said amorphous material or said polycrystalline material having a relatively small particle diameter to a polycrystalline material having a relatively large particle diameter; and a forming step of integrating and forming a thin film transistor in a prescribed region by using said semiconductor thin film thus converted to said polycrystalline material as an active layer, wherein said irradiation step comprises irradiating said region once or more with said energy beam, to which an output level is changed with respect to time and space is applied, and in said film forming step, said irradiation step and transportation therebetween, said substrate is not exposed to the air.