Patent ID: 6451663
Filing Date: 2002-09-17
Classification: H01L,Y10S

Abstract:
A method of manufacturing a cylindrical storage node in a semiconductor device, comprising:forming a plurality of holes in a molding insulator on cell areas; etching an etch stopping layer at the bottom of each hole and exposing a poly plug; depositing a conductive layer of a uniform thickness on the molding insulator having the plurality of holes; filling a plugging material on the conductive layer deposited on the plurality of holes; removing an upper portion of the plugging material by an etchback process to expose an upper portion of the molding insulator and the conductive layer in surrounding areas of each hole; removing the conductive layer exposed in surrounding areas of each hole to isolate the conductive layer in each hole from the conductive layer in is other holes; removing the plugging material from each hole; and removing the remaining molding insulator.