Patent ID: 6165879
Filing Date: 2000-12-26
Classification: H01L

Abstract:
A method for forming a self-aligned contact, comprising:providing a semiconductor substrate having at least a gate electrode and a source/drain region, with a first spacer formed on a sidewall of the semiconductor substrate;depositing a first insulation layer over the semiconductor substrate;forming a hard mask layer on the first insulation layer;depositing a second insulation layer over the hard mask layer;removing the second insulation layer;etching the hard mask layer and the first insulation layer until a portion of the first spacer is exposed to form a gap region, whereby the first insulation remains between the first spacers;depositing a conductive layer over the gap region and the hard mask layer;etching back the conductive layer to form a second spacer; andetching the first insulation layer until a surface of the semiconductor substrate is exposed to form a self-aligned contact.