Patent ID: 7312130
Filing Date: 2007-12-25
Classification: H01L

Abstract:
1. A method of forming a capacitor structure, the method comprising: forming an insulating layer on a substrate; forming a storage node contact through the insulating layer; forming a first capacitor electrode on the insulating layer, the first capacitor electrode defining a cavity therein, wherein the cavity has a first portion parallel with respect to the substrate and a second portion perpendicular with respect to the substrate wherein the storage node contact provides electrical connection between the first capacitor electrode and the substrate, wherein the second portion of the cavity defined by the first capacitor electrode is laterally offset non-symmetrically with respect to the storage node contact in a direction parallel with respect to a surface of the substrate; forming a capacitor dielectric layer on portions of the first capacitor electrode; and forming a second capacitor electrode on the capacitor dielectric layer such that the capacitor dielectric layer is between the first and second capacitor electrodes.