Patent ID: 6756624
Filing Date: 2004-06-29
Classification: H01L

Abstract:
A metal-insulator-metal (MIM) capacitor structure, comprising:a first substrate layer with a feature formed therein, the first substrate layer having a top surface, the feature having sidewalls and a bottom; an encapsulated metal structure in the feature, where the sidewalls and bottom of the feature are covered by a first barrier layer and the feature is filled with metal covered by an additional barrier layer in contact with the first barrier layer, to form a lower plate of the capacitor structure; a second substrate layer on the top surface of the first substrate layer, the second substrate layer having an opening formed therein overlying the encapsulated metal structure; a dielectric layer covering sidewalls of the opening and a portion of the encapsulated metal structure at a bottom of the opening; and an additional layer covering the dielectric layer on the sidewalls and on the bottom of the opening and filling the opening, to form an upper plate of the capacitor structure, wherein the dielectric layer and the additional layer are planarized so that the top surface of the second substrate layer is exposed.