Patent ID: 6071799
Filing Date: 2000-06-06
Classification: H01L

Abstract:
A method of forming a contact of a semiconductor device comprising steps of:providing a semiconductor substrate defined as a memory cell portion and a memory cell peripheral portion;sequentially forming a gate insulating film, a first conductive layer and a first insulating film on top of the semiconductor substrate;patterning said gate insulating film, said first conductive layer and said first insulating film;forming a first spacer at a sidewall of said first insulating film and said first conductive layer patterned;sequentially forming an etching barrier layer and a second insulating film on the exposed surface of the entire structure;forming a first photoresist pattern on said second insulating film;simultaneously forming the first contact hole and the storage node contact hole respectively on the top of said second insulating film disposed on the memory cell portion and memory cell peripheral portion by selectively removing said second insulating film and etching barrier layer by using the first photoresist film pattern as a mask;forming said first photoresist film pattern;forming a conductive layer on the exposed surface of the entire structure;etching said conductive layer, to form a second spacer to the sidewall of said first contact hole and a storage node plug in the storage node contact hole;forming a third insulating film on the surface of the entire structure, and forming a second photoresist film pattern on said third insulating film in order to form a contact between a third conductive layer formed according to the following process and said first conductive layer disposed on the memory cell peripheral portion, and the bit line contact hole of the memory cell portion;simultaneously forming the bit line contact hole and a second contact hole by selectively removing said third insulating film and second insulating film and first insulating film by using said second photoresist film pattern as a mask; andremoving said second photoresist film pattern, and forming and patterning the second conductive layer on the surface of the entire structure.