Patent ID: 6429087
Filing Date: 2002-08-06
Classification: H01L

Abstract:
A method of forming a capacitor, comprising:forming a mass over an electrical node; forming an opening within the mass, the opening having a lower portion proximate the node and an upper portion above the lower portion, the lower portion being wider than the upper portion; forming a first conductive layer within the opening and along a periphery of the opening; after forming the first conductive layer, removing a portion of the mass from beside the upper portion of the opening while leaving an other portion of the mass beside the lower portion of the opening; forming a dielectric material over the first conductive layer; forming a second conductive layer over the dielectric material, the second conductive layer being separated from the first conductive layer by the dielectric material; and wherein the forming the first conductive material comprises: depositing polysilicon within the opening and over the mass; forming photoresist within the opening to protect the polysilicon within the opening; exposing at least some of the polysilicon which is not within the opening to etching conditions to remove said at least some of the polysilicon; and ashing the photoresist to remove the photoresist from within the opening.