Patent ID: 7332764
Filing Date: 2008-02-19
Classification: H01L

Abstract:
1. A metal-insulator-metal (MIM) capacitor, comprising: an interlayer insulating layer on a semiconductor substrate; a lower metal interconnection and a lower metal electrode in the interlayer insulating layer and spaced apart from each other; a first capping layer on the lower metal interconnection and a second capping layer on the lower metal electrode; a monolithic intermetal dielectric layer covering the lower metal interconnection, the lower metal electrode, the first and second capping layers, and the interlayer insulating layer; a via hole and an upper metal interconnection groove both disposed in the monolithic intermetal dielectric layer, wherein: at least one capacitor trench region extending through the monolithic intermetal dielectric layer, the at least one capacitor trench region exposing the second capping layer on the lower metal electrode; an upper metal interconnection filling the upper metal interconnection groove, the upper metal interconnection being electrically connected to the lower metal interconnection through the via hole; a dielectric layer covering inner surfaces of the at least one capacitor trench region; and an upper metal electrode surrounded by the dielectric layer to fill the at least one capacitor trench region.