Patent ID: 6162671
Filing Date: 2000-12-19
Classification: H01L

Abstract:
A method of forming a storage cell capacitor on a substrate having a node, comprising the steps of:forming a reaction barrier layer over the node;forming a conductive layer over the reaction barrier layer;sequentially dry etching the conductive layer and the reaction barrier layer to form a storage node electrode;wet etching the reaction barrier layer, thereby recessing the lateral sides of the reaction barrier layer with respect to the conductive layer;forming an oxidation barrier layer over the conductive layer and the reaction barrier layer; anddry etching the oxidation barrier layer to form an oxidation barrier spacer on the recessed lateral sides of the reaction barrier layerwherein the reaction barrier layer is made of a material selected from the group consisting of TiN, TaN, TiSiN, TaSiN, TiAlN, TaAlN, and combinations.