Patent ID: 7288453

Claim:
A method of fabricating an analog capacitor comprising: forming a lower insulating layer on a semiconductor substrate; forming a bottom electrode on the lower insulating layer; before beginning to form a capacitor dielectric layer on the formed bottom electrode, post-treating the formed bottom electrode in an oxidizing medium that achieves a reduction in a low voltage coefficient of capacitance of the resulting analog capacitor; following post-treating the formed bottom electrode in the oxidizing medium and before begining to form the capacitor dielectric layer on the formed bottom electrode, post-treating the bottom electrode in a deoxidizing medium; forming the capacitor dielectric layer on the post-treated bottom electrode; post-treating the capacitor dielectric layer in a deoxidizing medium; following post-treating the capacitor dielectric layer in the deoxidizing medium, post-treating the post-treated capacitor dielectric layer in an oxidizing medium; and following post-treating the post-treated capacitor dielectric layer, forming a top electrode on the post-treated capacitor dielectric layer.