Patent ID: 6759703
Filing Date: 2004-07-06
Classification: H01L

Abstract:
A capacitor formed on a substrate, having an upper electrode, and a lower electrode interposed between the upper electrode and the substrate, with a dielectric between the upper and lower electrodes, at least the lower electrode being made of copper, whereinthe lower electrode is formed in a first recess that passes through a first insulating layer of an interlayer insulating film, wherein top surfaces of the lower electrode and the first insulating layer are formed along a first plane, the upper electrode and the dielectric are formed in a second recess which passes through a second insulating layer of the interlayer insulating film, a barrier is provided at a top surface of the lower electrode to prevent diffusion of copper into said dielectric, the lower electrode does not extend into the second recess, and the dielectric extends out of the second recess on the top surface of the second insulating layer, and wherein a top surface of the dielectric on the second insulating layer and a top surface of the upper electrode are coplanar.