Patent ID: 7050878

Claim:
An apparatus comprising: a first chamber for forming a semiconductor film over a substrate; a second chamber for irradiating laser light on the semiconductor film; a conveyance chamber separated from the first and second chambers by means of valves and operative to convey the substrate without exposing the substrate to the atmosphere; at least one laser oscillator; an optical system for converging the laser light from the laser oscillator; and a computer, wherein the second chamber includes position control means for controlling the position of the substrate, and wherein the computer operates, to identify regions forming active layers of a group of devices based on a marker formed on the semiconductor film and information indicative of a pattern of the device group formed on the substrate, to define a specific area of the semiconductor film that includes the active layer forming regions and is subjected to laser irradiation with reference to the marker, and to synchronize the laser oscillator with the position control means thereby subjecting the specific area to the laser irradiation in the second chamber.