Patent ID: 6376883
Filing Date: 2002-04-23
Classification: H01L

Abstract:
An integrated capacitor within an integrated semiconductor circuit, the capacitor comprising:a bottom electrode of a first conductivity type on a thick oxide region, the bottom electrode including: a bottom layer of silicon, and a second layer of polysilicon on top of the bottom layer, the second layer having an opening that extends to a top surface of the bottom layer; a dielectric layer on top of the bottom electrode, conforming to the bottom and sides of the opening; and a top electrode of a second conductivity type on top of the dielectric, the top electrode including: a third layer of polysilicon in the opening conforming to a surface of the dielectric layer, wherein the third layer is separated at the sides of the opening from the second layer by the dielectric, and separated at the bottom of the opening from the bottom layer by the dielectric layer; and a top layer of polysilicon on top of the third silicon layer.