Patent ID: 7063999

Claim:
A thin film processing method of processing a thin film by irradiating an optical beam onto a thin film, wherein: one unit of irradiation of the optical beam includes irradiations due to first and second optical pulses onto the thin film, the thin film is processed by repeating the one unit of irradiation, each of the first and the second optical pulse has different pulse waveforms, the first optical pulse and the second optical pulse are supplied from respective, separate first and second optical pulse sources, and said thin film is positioned in position relative to said first and second optical pulse sources for each said unit of irradiation, wherein the first and second optical pulses control a cooling rate to 1.6×10 10 ° C. or less which prevents the thin film from becoming microcrystalline or amorphous and can satisfactorily grow the crystal size of the thin film.