Patent ID: 6194309
Filing Date: 2001-02-27
Classification: H01L

Abstract:
A method for forming a contact of a semiconductor device in which a conductive layer pattern is electrically connected to a semiconductor substrate and is formed in a first interlayer insulating film that is formed over the semiconductor substrate, the method comprising:forming a second interlayer insulating film over the first interlayer insulating film and the conductive layer pattern;forming a contact hole by etching the second interlayer insulating film down to a top surface of the conductive layer pattern;forming a sidewall spacer on sidewalls of the contact hole;etching the conductive layer pattern through the contact hole to recess a predetermined depth from a bottom of the contact hole, to increase the surface area of an exposed portion of the conductive layer pattern;doping an impurity ion into the conductive layer pattern through the contact hole to increase at least the impurity concentration of the exposed portion of the conductive pattern, wherein the doping is performed after the etching of the conductive layer pattern; andfilling the contact hole with a conductive material.