Patent ID: 8574989
Filing Date: 2013-11-05
Classification: H01L

Abstract:
1. A method of forming a semiconductor structure comprising: forming a polysilicon layer over a substrate; forming a mask layer over the polysilicon layer; patterning the mask layer to form a patterned mask layer; forming a polysilicon structure by etching the polysilicon layer using the patterned mask layer as a mask; and forming a dielectric layer over the substrate and surrounding the polysilicon structure, wherein the dielectric layer is arranged to provide no stress or a tensile stress on a sidewall of the polysilicon structure, the polysilicon structure having an upper surface and a lower surface, and the etching of the polysilicon layer being arranged to cause a width of the upper surface of the polysilicon structure to be greater than that of the lower surface of the polysilicon structure.