Method of polycrystallization, method of manufacturing polysilicon thin film transistor, and laser irradiation device therefor

摘要

A device for irradiating a laser beam onto an amorphous silicon thin film formed on a substrate. The device includes: a stage mounting the substrate; a laser oscillator for generating a laser beam; a projection lens for focusing and guiding the laser beam onto the thin film; a reflector for reflecting the laser beam guided onto the thin film; a controller for controlling a position of the reflector, and an absorber for absorbing the laser beam reflected by the reflector.