Patent ID: 6171902
Filing Date: 2001-01-09
Classification: H01L,Y10S

Abstract:
A method of manufacturing a semiconductor device of a DRAM type having a cylinder type capacitor, comprising:forming a contact hole in an inter-layer insulating layer on a silicon substrate, said contact hole communicating with a conductive portion of said silicon substrate;forming an upper layer on said inter-layer insulating layer and over said contact hole, so that said upper layer is embedded only within an upper portion of said contact hole and so that said upper layer is not embedded within a lower portion of said contact hole;forming a recessed portion in said upper layer having an aperture larger than an aperture of said contact hole, by etching said upper layer, so that a step portion of said inter-layer insulating layer surrounding said contact hole within said recessed portion is exposed;removing the upper portion of said upper layer within said contact hole; andembedding a contact material into said contact hole and covering an internal surface of said recessed portion with the contact material, an entirety of said contact hole being filled with the contact material.