Patent ID: 6808975
Filing Date: 2004-10-26
Classification: H01L,Y10S

Abstract:
A method for forming a self-aligned contact hole comprising:(a) forming a plurality of conductive structures on a semiconductor substrate, each conductive structure including a conductive film pattern having an upper and side surfaces and a protection pattern formed on the upper and side surfaces of the conductive film pattern; (b) forming a first insulation film to fill a space between adjacent conductive structures; (c) successively etching upper portions of the first insulation film and the protection patterns until each of the protection patterns has a level upper surface that is exposed; (d) forming a second insulation film on the resultant structure on the semiconductor substrate; and (e) selectively etching portions of the second insulation film and the first insulation film using a photolithography process to form the self-aligned contact hole exposing a portion of the semiconductor substrate between adjacent conductive structures.