Patent ID: 6479329
Filing Date: 2002-11-12
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device having at least one thin film transistor, said method comprising the steps of:forming a semiconductor film comprising silicon on an insulating surface; irradiating said semiconductor film with a line-shaped laser beam having an elongated cross section in one direction; moving said semiconductor film in a direction perpendicular to the elongation direction of said elongated cross section of the line-shaped laser beam, thereby crystallizing said semiconductor film; patterning the crystallized semiconductor film to form an active layer of the thin film transistor, wherein the crystallized semiconductor film contains hydrogen at a concentration of 1Ã—1017 to 5Ã—1019 atoms/cm3, and carbon and nitrogen at a concentration of 1Ã—1016 to 5Ã—1018 atoms/cm3 respectively, and oxygen at a concentration 1Ã—1017 to 5Ã—1019 atoms/cm3.