Patent ID: 7745232
Filing Date: 2010-06-29
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising: (a) forming a transistor including a diffusion region formed in a semiconductor substrate; (b) forming a first insulation film over the transistor; (c) forming a ferroelectric capacitor including a lower electrode, a ferroelectric film, and an upper electrode over the first insulation film; (d) forming a second insulation film over the first insulation film so as to cover said ferroelectric capacitor; (e) forming a first contact hole and a second contact hole in said second insulation film so as to expose said upper electrode and said lower electrode respectively; (f) after forming a fist contact hole and a second contact hole, conducting heat treatment on said ferroelectric capacitor in an oxidizing atmosphere; (g) after conducting the heat treatment, forming a third contact hole in said second insulation film and in said first insulation film to expose said diffusion region; (h) forming a first conductive nitride film over said second insulation film so as to cover said first, second, and third contact holes; (i) forming a conductive layer over said first conductive nitride film so as to fill said first, second, and third contact holes.