Patent ID: 7951654

Claim:
A method of fabricating a semiconductor device comprising the steps of: forming an amorphous semiconductor film having an upper surface; forming a first crystalline region by irradiating a first region of the upper surface of the amorphous semiconductor film with a YAG laser by relatively moving the YAG laser in a first direction with respect to the first region of the amorphous semiconductor film; and after forming the first crystalline region, forming a second crystalline region by irradiating a second region of the upper surface of the amorphous semiconductor film including a portion of the first crystalline region with the YAG laser by relatively moving the YAG laser in a direction parallel to the first direction with respect to the second region of the amorphous semiconductor film, wherein a wavelength of the YAG laser falls in a range of 370 nm through 650 nm, and wherein the first region of the upper surface of the semiconductor film overlaps with a portion of the second region of the upper surface.