Patent ID: 6468844
Filing Date: 2002-10-22
Classification: G02F,H01L

Abstract:
A method comprising:forming an oxide in a silicon substrate by using a LOCOS technique; forming a gate insulating film on said silicon substrate; forming a gate electrode on said gate insulating film; forming a source region and a drain region in said silicon substrate, one of said source region and said drain region being adjacent to said oxide; forming a first insulating film to cover at least said gate electrode; forming a source electrode and a drain electrode in contact with said source region and said drain region respectively; forming a second insulating film having a flat surface, on said first insulating film; forming a pixel electrode comprising aluminum connected with one of said source electrode and said drain electrode, on a part of said flat surface; forming a third insulating film on said flat surface which said pixel electrode is not formed thereon; performing a heat treatment to form protrusions on a surface of said pixel electrode; and performing a chemical mechanical polishing process to remove at least said protrusions.