Patent ID: 6713798
Filing Date: 2004-03-30
Classification: H01L

Abstract:
A semiconductor device comprising:an insulating film formed over a semiconductor substrate; and a capacitor having a lower electrode, a dielectric film, and an upper electrode, that are formed on the insulating film; wherein said side walls of the lower electrode, the dielectric film, and the upper electrode form one roundish surface, wherein a thickness of the upper electrode in both sides is formed thinner than that in a center, and wherein &Dgr;W is more than 0.28 &mgr;m, &Dgr;W being defined as &Dgr;W=Tdi+Tbe/tan &thgr;, where Tdi is a thickness of the dielectric film, Tbe is a thickness of the lower electrode, and &thgr; is a taper angle of a line connecting a side edge of the bottom portion of the upper electrode and a side edge of the bottom portion of the lower electrode.