Patent ID: 8318577
Filing Date: 2012-11-27
Classification: H01L

Abstract:
1. A method for forming a capacitor structure, the method comprising: forming a first dielectric layer over a conductive region, wherein the first dielectric layer has a first conductive layer at a top surface of the first dielectric layer; forming a first opening in the first dielectric layer over the conductive region, wherein the first opening exposes a first sidewall of the first conductive layer, wherein a portion of the first dielectric layer remains between a bottom of the first opening and the conductive region, and wherein the first opening has a bottom; forming a second conductive layer within the first opening, wherein the second conductive layer contacts the first sidewall of the first conductive layer; removing a portion of the second conductive layer from the bottom of the first opening; forming an insulating layer within the first opening; removing a portion of the insulating layer from the bottom of the first opening; extending the first opening through the first dielectric layer to expose the conductive region; and filling the first opening with a conductive material, wherein the conductive material contacts the conductive region, and wherein the second conductive layer forms a first plate electrode of the capacitor structure and the conductive material forms a second plate electrode of the capacitor structure.