Patent ID: 7538014

Claim:
A method of fabricating semiconductor device using a crystalline semiconductor material composed of a plurality of single-crystal grains of a semiconductor, comprising: forming an amorphous material of said semiconductor or a polycrystalline material of said semiconductor on a substrate; forming a first crystalline material by uniformly heat-treating said amorphous material or said polycrystalline material by a plurality of times at such a temperature as to partially melt crystal grains having a specific face orientation with respect to the vertical direction of the surface of said substrate and to melt said amorphous material or crystal grains having a face orientation other than said specific face orientation; and forming a second crystalline material by heat-treating said first crystalline material by a plurality of times so as to selectively form, on said first crystalline material, a temperature distribution having a high temperature region and a low temperature region whose temperature is lower than that of said high temperature region, wherein the temperature of said low temperature region is set to partially melt said crystal grains having said specific face orientation.