Patent ID: 6312986
Filing Date: 2001-11-06
Classification: H01L

Abstract:
A method for fabricating a capacitor comprising the steps of:forming a sacrificial layer of material on the sidewall and bottom of a container opening;forming a second material layer on said sacrificial layer, the second material layer not filling the opening;spacering the second material layer to remove said layer from the bottom of said opening and form a cylindrical spacer concentric with the sidewall of the opening;etching a portion of said sacrificial layer to remove the layer from the bottom of the opening and to remove a portion of the layer from between the cylindrical spacer and the sidewall of said opening;forming a first conductive layer over the exposed portion of said cylindrical spacer, remaining sacrificial layer, sidewall and bottom of said opening, without completely filling said opening;forming a dielectric layer on said first conductive layer without completely filling said opening; andforming a second conductive layer on said dielectric layer.