Patent ID: 7790613
Filing Date: 2010-09-07
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising the steps of: forming at least a polysilicon interlayer film above a memory cell selection transistor that is formed on a semiconductor substrate and has a contact plug connected to a source and a drain; forming a cylinder-shaped through-hole in the polysilicon interlayer film to expose the contact plug and shaping a boundary surface between a bottom and a side wall of the through-hole into a curve; and forming a storage capacity part in the inner side of the through-hole, the storage capacity part being connected to the contact plug, wherein, in the step of forming the through-hole, the boundary surface between the bottom and the side wall of the through-hole is shaped in the curve by annealing the polysilicon interlayer film, in a hydrogen atmosphere or in an inert gas atmosphere.