Patent ID: 6485654
Filing Date: 2002-11-26
Classification: H01L,Y10S

Abstract:
A method of fabricating a self-aligned contact, comprising:providing a substrate; sequentially forming a conductive layer, an etching stop layer and a sacrificed oxide layer on the substrate; forming a patterned photoresist layer on the sacrificed oxide layer; forming a stack structure by performing a process of anisotropic etching sequentially on the exposed sacrificed oxide layer, the etching stop layer, and the conductive layer; removing the photoresist layer; forming a spacer on a sidewall of the stack structure; removing the etched sacrificed oxide layer, such that the spacer protrudes above an upper surface of the etching stop layer; forming a dielectric layer on the substrate and said stack structure, wherein the dielectric layer has a flat upper surface; removing a part of the dielectric layer to form a contact hole which exposes a part of said substrate; and forming a conductive plug in the contact hole.