Patent ID: 7214574

Claim:
A method of forming a semiconductor device comprising: forming a film comprising a material selected from the group consisting of silicon and compound containing silicon over a substrate; first irradiating said film with an infrared light from a lower face side of the substrate wherein the infrared light is emitted from a first light source; second irradiating said film with a linear ultraviolet or visible light from an upper side of the substrate wherein the linear ultraviolet or visible light is emitted from a second light source; and moving said substrate or moving said first and second light sources during said first irradiating and said second irradiating to crystallize said film or to improve crystallinity of said film; and forming a gate electrode with a gate insulating film interposed therebetween after first irradiating and second irradiating, wherein said first light source comprises a linear lamp; and wherein said second light source comprises a lamp.