Patent ID: 6962861

Claim:
A method of forming a polysilicon layer in a semiconductor device, comprising: providing a substrate; forming an oxide layer over the substrate; depositing a first silicon layer over the oxide layer, wherein the first silicon layer comprises microcrystalline polysilicon, wherein the step of depositing a first silicon layer is performed with a low pressure chemical vapor deposition in the presence of a reactive gas containing silicon and a carrier gas, and wherein the reactive gas containing silicon is selected from the group consisting of SiH 4 , SiH 2 Cl 2 , SiD 4 , SiD 2 Cl 2 , SiDCl 3 , SiHCl 3 , SiD 3 Cl, and SiH 3 Cl; depositing an amorphous silicon layer over the first silicon layer; and annealing the amorphous silicon layer to form a polysilicon layer.