Patent ID: 6451649
Filing Date: 2002-09-17
Classification: H01L

Abstract:
A method of fabricating a semiconductor device, comprising:(1) forming an interlayer insulating film, an etch stopper film, and a PE-TEOS film in succession on a semiconductor substrate having a wordline and a bitline formed thereon; (2) etching the PE-TEOS film, the etch stopper film, and the interlayer insulating film using a storage electrode contact mask as an etch mask to form a storage electrode contact hole; (3) forming a layer of material for the storage electrode contact plug on the PE-TEOS film, wherein the layer of material extends into and fills the storage electrode contact hole; (4) etching back the layer of material for the storage electrode contact plug to form a storage electrode contact plug; (5) forming a core oxide film pattern exposing a predetermined area for the storage electrode; (6) removing at least a portion of the storage electrode contact plug and at least a portion of the PE-TEOS film by utilizing the differences of etch rate among the core oxide film pattern, the PE-TEOS film and the storage electrode contact plug, said removing enlarges the storage electrode contact hole; and (7) forming a cylindrical storage electrode which is in electrical contact with the semiconductor substrate.