Patent ID: 6724034
Filing Date: 2004-04-20
Classification: H01L

Abstract:
A semiconductor integrated circuit device, comprising:a first insulating film formed over a main surface of a semiconductor substrate and having a first connection hole in which a first conductive layer is buried; a second insulating film formed over the first insulating film and having a trench over the first connection hole; and a capacitor formed in the trench, wherein the capacitor comprises a lower electrode constituted by a second conductive layer formed over a sidewall and bottom surface of the trench; a capacitor insulating film formed over the lower electrode; and an upper electrode constituted by a third conductive layer formed over the capacitor insulating film, and a metal silicide layer electrically connected to the first conductive layer in the first connection hole is provided between the sidewall and bottom surface of the trench and the lower electrode, wherein a fourth conductive layer made of polycrystalline silicon is further formed between the sidewall and bottom surface of the trench and the metal silicide layer.