Patent ID: 7014708

Claim:
A method of forming a silicon thin film comprising the steps of: providing a substrate; forming an amorphous silicon (a-Si) pattern on the substrate, wherein the amorphous silicon pattern comprising: a first region having a first height; a second region having the first height; at least one first pointed region being adjacent to the second region, each first pointed region having a second height; a third region, the third region being located between the first region and the second region, each first pointed region being located on the third region, the third region having a third height; and at least one fourth region, each fourth region being located on the third region between the first region and each first pointed region, each fourth region having a fourth height smaller than the second height and greater than the third height; and performing the laser crystallization process to allow an amorphous silicon seed in each first pointed region adjacent to each fourth region to grow and to crystallize as a first single crystal silicon grain in each fourth region.