Patent ID: 6767773
Filing Date: 2004-07-27
Classification: H01L,Y10S

Abstract:
A method of production of a thin flu type semiconductor device provided with a substrate and an operating semiconductor layer pattern-formed above the substrate, comprising:forming a semiconductor layer to be the operating semiconductor layer above the substrate; processing the semiconductor layer to be shaped so that it has a wide region and a narrow region and that the narrow region is connected to the wide region in a manner that the narrow region is positioned to be asymmetric with respect to the wide region; forming a heat-retaining layer on the narrow region to cover a side portion of the narrow region selectively through a separation layer after processing the semi conductor layer; and crystallizing the semiconductor layer by irradiating an energy beam onto the semiconductor layer along a longitudinal direction of the narrow region from the wide region toward the narrow region in a state that the heat-retaining layer is formed.