Patent ID: 6200887
Filing Date: 2001-03-13
Classification: H01L

Abstract:
A method of forming a smooth edged polysilicon gate in an integrated circuit device comprising:providing a gate oxide layer over the surface of a semiconductor substrate;depositing a polysilicon layer overlying said gate oxide layer;depositing a masking layer over said polysilicon layer;patterning said masking layer to leave a mask overlying a region where said gate is formed;ion implanting said polysilicon layer in portions not covered by said mask thereby amorphizing said polysilicon layer not covered by said mask and amorphizing a portion of said polysilicon layer covered by said mask by lateral diffusion of said ions; andetching away said polysilicon layer not covered by said mask to form said polysilicon gate having a smooth region of said amorphized polysilicon layer along edges of said polysilicon gate to complete formation of said smooth edged polysilicon gate completing fabrication of said integrated circuit device.