Semiconductor thin film and method of fabricating semiconductor thin film, apparatus for fabricating single crystal semiconductor thin film, and method of fabricating single crystal thin film, single crystal thin film substrate, and semiconductor device

摘要

A method of fabricating a single crystal thin film includes forming a non-single crystal thin film on an insulating base; subjecting the non-single crystal thin film to a first heat-treatment, thereby forming a polycrystalline thin film in which polycrystalline grains are aligned in an approximately regular pattern; and subjecting the polycrystalline thin film to a second heat-treatment, thereby forming a single crystal thin film in which the polycrystalline grains are bonded to each other. In this method, either the first heat-treatment or the second heat-treatment may be performed by irradiation of laser beams, preferably, emitted from an excimer laser. A single crystal thin film formed by this fabrication method has a performance higher than a related art polycrystalline thin film and is suitable for fabricating a device having stable characteristics. The single crystal thin film can be fabricated for a short-time by using laser irradiation as the heat-treatments.