Patent ID: 6110835
Filing Date: 2000-08-29
Classification: H01L

Abstract:
A method for fabricating an electrode structure for a cylindrical capacitor constructed on a semiconductor substrate, comprising the steps of:(1) forming an insulating layer over the substrate;(2) forming a contact window in the insulating layer at a location;(3) forming a first conductive layer over the insulating layer, which first conductive layer fills the entire contact window;(4) forming a mask layer on and adjacent to the first conductive layer;(5) forming a second conductive layer at a location over the mask layer substantially directly above the contact window, wherein the second conductive layer is isolated from the first conductive layer by the mask layer;(6) forming a sidewall spacer on the sidewall of the second conductive layer;(7) performing an etching process with the sidewall spacer serving as mask so as to remove the second conductive layer, a part of the mask layer, and a part of the first conductive layer, with the remaining part of the first conductive layer forms the electrode structure.