Patent ID: 7510922
Filing Date: 2009-03-31
Classification: H01L

Abstract:
1. A method for forming a semiconductor device, comprising: providing a substrate; forming a first insulating layer over the substrate; forming an etched polysilicon base structure over the first insulating layer, said etched polysilicon base structure having a first base width; forming a spacer on at least one side of the etched polysilicon base structure having a total spacer width; applying a photoresist layer over the etched polysilicon base structure and spacer; forming an opening in the photoresist layer in alignment to overlap with the spacer to expose only a portion of the spacer to form a photoresist etch mask; removing part of the spacer that is formed on at least one side of the etched polysilicon base structure from the upper sidewall surface of said etched polysilicon base structure using the photoresist etch mask; removing the photoresist etch mask; depositing a polysilicon layer in contact with at least any exposed surface of the etched polysilicon base structure; anisotropically etching said polysilicon layer to form a polysilicon spacer on an upper sidewall surface of said etched polysilicon base structure, thereby forming a polysilicon structure having an upper region with a second width that is wider than the first base width; and forming silicide in the upper region of the polysilicon structure.