Patent ID: 6500709
Filing Date: 2002-12-31
Classification: H01L,Y10S

Abstract:
A method of forming a capacitor comprising the following steps:etching an opening through a semiconductive material masking layer and a first layer sequentially formed on over a node location to the node location using the semiconductive material masking layer as an etch mask; forming a storage node layer within the opening and in electrical connection with the masking layer, the storage node layer including doped polysilicon; removing at least a portion of the masking layer to form a capacitor storage node comprising the masking layer and the storage node layer; forming a rugged polysilicon layer over the doped polysilicon; removing the rugged polysilicon from the storage node to leave a roughened outermost surface on the storage node; forming a capacitor dielectric layer operatively proximate the capacitor storage node; and forming an outer capacitor plate operatively proximate the capacitor dielectric layer.