Patent ID: 7390706
Filing Date: 2008-06-24
Classification: H01L

Abstract:
1. A method of forming a monocrystalline silicon thin film, comprising: sequentially stacking a first buffer layer and an amorphous silicon layer on a substrate; forming a first silicon region in which crystallization begins, a second silicon region having a width smaller than a width of the first silicon region and located on a central portion of a side of the first silicon region, and a third silicon region having a width than greater the width of the second silicon region and contacting the second silicon region, by patterning the amorphous silicon layer; forming a metal mask partly on the first silicon region; and crystallizing the amorphous silicon layer by cooling the amorphous silicon layer after melting the entire amorphous silicon layer except for a portion of the amorphous silicon layer under the metal mask by radiating laser beams to the patterned amorphous silicon layer.