Patent ID: 6284641
Filing Date: 2001-09-04
Classification: H01L

Abstract:
A method of forming a self-aligned contact in a semiconductor structure topology including a gate stack having an electrically insulative top surface and an electrically insulative structure projecting from the top surface of the gate stack, and wherein there is an electrically conductive material upon both the gate stack and the electrically insulative structure, the method comprising:forming a silicon nitride film over the semiconductor structure topology;patterning a first photoresist over said silicon nitride film to protect a first section of said silicon nitride film and to expose a second section of said silicon nitride film;removing said second section of said silicon nitride film;forming a first dielectric film over said semiconductor structure topology and in lateral contact with said first section of said silicon nitride film;reflowing said first dielectric film to fill into vacant regions of said semiconductor structure topology; andremoving said first section of said silicon nitride film to form a depression in said semiconductor structure topology.