Patent ID: 6670668
Filing Date: 2003-12-30
Classification: H01L

Abstract:
A memory cell structure, which comprises:a transistor having: an electrode; and a capacitor having a first electrode structure of platinum, said platinum of said first electrode structure having a texture and being an average grain size of between 60 nm and 100 nm, a second electrode structure, a dielectric structure of a high epsilon material, and a barrier structure; an isolation layer covering said transistor; said isolation layer defining a contact hole extending therethrough, said contact hole being filled with doped silicon, said doped silicon filled in said contact hole being in contact with said electrode of said transistor; said barrier structure having a first layer of titanium and a second layer of titanium nitride; said first layer being disposed on said doped silicon; said second layer being disposed on said first layer and having a stoichiometry N:Ti>1; said first electrode structure of platinum being disposed on said second layer of titanium nitride; said dielectric structure being disposed on said first electrode structure; and said second electrode structure being disposed on said dielectric structure.