Patent ID: 7508023
Filing Date: 2009-03-24
Classification: H01L

Abstract:
1. A capacitor structure, comprising: a substrate; a first metal layer in the substrate; an etching stop layer on the substrate, having therein an opening that exposes a portion of the first metal layer; a connection layer on the portion of the first metal layer, a sidewall of the opening and a portion of the etching stop layer; a second metal layer over the connection layer; an insulating layer between the connection layer and the second metal layer, wherein edges of insulating layer, second metal layer and connection layer are aligned with each other, and a normal line of an alignment surface formed by the aligned edges is perpendicular to a normal line of the substrate; a dielectric layer over the substrate to cover the second metal layer; a first contact plug in the dielectric layer connected with the first metal layer; and a second contact plug in the dielectric layer connected with the second metal layer.