Patent ID: 7638377
Filing Date: 2009-12-29
Classification: G02F,H01L,Y10S

Abstract:
1. A method of manufacturing a semiconductor device, comprising: forming a first semiconductor film comprising amorphous semiconductor over an insulating surface of an insulating film; partially crystallizing the first semiconductor film comprising amorphous semiconductor by a heat treatment to form a second semiconductor film in which crystal regions and amorphous regions are intermingled; and irradiating the second semiconductor film in which the crystal regions and the amorphous regions are intermingled with a laser beam to form a third semiconductor film comprising polycrystalline semiconductor with an improved crystallinity; wherein an area of each of the amorphous regions in the second semiconductor film in which the crystal regions and the amorphous regions are intermingled is equal to or less than 10.0 μm wherein an area of at least one of the amorphous regions is equal to or greater than 0.30 μm wherein the laser beam has a wave length from 360 to 650 nm, wherein the insulating film is formed from any one selected from a silicon oxide film, a silicon nitride film, silicon oxynitride film, or a lamination thereof, and wherein the insulating film and the first semiconductor film are continuously formed without exposure to the atmosphere.