Patent ID: 9099464
Filing Date: 2015-08-04
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate; a first interlayer insulating film formed over the semiconductor substrate; a first capacitor recess and a wiring trench formed in the first interlayer insulating film; a lower electrode formed in the first capacitor recess; a first wiring formed in the wiring trench; a first etching stopper film disposed over the first interlayer insulating film; a via layer insulating film disposed over the first etching stopper film and that includes insulating material having an etching resistance different from an etching resistance of the first etching stopper film; a first via hole formed in the via layer insulating film and the first etching stopper film and that reaches an upper surface of the first wiring; a first plug, that include conductive material, formed in the first via hole; a second capacitor recess formed in the via layer insulating film and that reaches the first etching stopper film, the second capacitor recess at least partially overlapping the lower electrode as viewed in plan; and an upper electrode disposed covering a bottom surface and a side surface of the second capacitor recess and a partial upper surface of the via layer insulating film continuous with the second capacitor recess, the upper electrode and the lower electrode constituting a capacitor comprising the first etching stopper film as a capacitor dielectric film, wherein an outer peripheral line of the second capacitor recess is disposed outside an outer peripheral line of the lower electrode, as viewed in plan.