Patent ID: 6809360
Filing Date: 2004-10-26
Classification: H01L

Abstract:
A semiconductor device comprising:an insulating film formed over a semiconductor substrate; a first capacitor having a first lower electrode, a first ferroelectric film, and a first upper electrode, which are formed sequentially over the insulating film in a first region; and a second capacitor having a second lower electrode, a second ferroelectric film, and a second upper electrode, which are formed sequentially over the insulating film in a second region; wherein the first ferroelectric film is formed of first ferroelectric material that comprises plural of elements containing a first element, the second ferroelectric film is formed of second ferroelectric material that comprises plural of elements containing the first element, and a concentration of the first element in the second ferroelectric film is lower than a concentration of the first element in the first ferroelectric film.