Patent ID: 7250334
Filing Date: 2007-07-31
Classification: H01L

Abstract:
1. A method of forming a MIM (metal insulator metal) capacitor, comprising: forming a sidewall spacer against an edge of a layer of bottom electrode material, an edge of a layer of capacitor dielectric material and at least some of an edge of a layer of top electrode material, wherein at least some of the layer of bottom electrode material is formed over a first metal formed within a topmost metallization layer on a substrate, the layer of capacitor dielectric material is formed over the layer of bottom electrode material and the layer of top electrode material is formed over the layer of capacitor dielectric material; forming a layer of barrier material over the layer of top electrode material and the sidewall spacer; forming a layer of aluminum capping (ALCAP) material over the layer of barrier material, wherein the layer of aluminum capping material comprises at least some of a top electrode of the MIM capacitor and the first metal comprises at least some of a bottom electrode of the MIM capacitor; and wherein at least some of the layer of bottom electrode material, at least some of the capacitor dielectric material and at least some of the top electrode material are formed down into an aperture defined over the first metal, wherein the respective edges of the layer of bottom electrode material, capacitor dielectric material and top electrode material do not reside within the aperture nor does the sidewall spacer, and wherein a width of the aperture is less than a width of the first metal.