Patent ID: 6803621
Filing Date: 2004-10-12
Classification: H01L

Abstract:
A memory cell container comprising:a cavity formed in a structural layer, the cavity having a bottom and at least one sidewall extending from the bottom to an opening in a surface of the structural layer; a polysilicon layer covering the bottom and the at least one sidewall of the cavity; a nitride layer covering the polysilicon layer and at least a portion of the surface of the structural layer; and a barrier-layer forming an oxygen barrier for the cell container, said barrier layer being comprised of a material having a dielectric constant greater than that of the nitride layer, and covering only a portion of the nitride layer including an area around the opening in the surface of the structural layer and partially along the at least one sidewall within the cavity, said barrier layer including one of aluminum oxide, zirconium, hafnium, aluminum nitride, a metallic oxide layer having a higher dielectric constant than the nitride layer, and tungsten oxide.