Patent ID: 7184106

Claim:
A method of forming a liquid crystal display device, the method comprising the steps of: providing a substrate; forming an amorphous silicon layer over the substrate; forming at least one dielectric film only over a first portion of the amorphous silicon layer, the at least one dielectric film capable of partially reflecting light; irradiating the amorphous silicon layer with light to convert it to a polysilicon layer, the at least one dielectric film partially reflecting the light away from the first portion of the amorphous silicon layer wherein a first portion of the polysilicon layer has a first polysilicon grain size and a second portion of the polysilicon layer has a second polysilicon grain size which is larger than the first polysilicon grain size, the first portion of the polysilicon layer being derived from the first portion of the amorphous silicon layer; and forming a first plurality of thin film transistors from the first portion of the polysilicon layer.