Patent ID: 6159759
Filing Date: 2000-12-12
Classification: G02F

Abstract:
A method to form metal pixels in the fabrication of a liquid crystal display integrated circuit device comprising:providing a semiconductor substrate;providing metal conductors in an insulating layer overlying said semiconductor substrate;depositing a first isolation layer overlying said metal conductors and said insulating layer;depositing a first silicon nitride layer overlying said first isolation layer;patterning said first silicon nitride layer to form openings where vias are planned;depositing a second isolation layer overlying said first silicon nitride layer and said first isolation layer;depositing a second silicon nitride layer overlying said second isolation layer;patterning said second silicon nitride layer to form masks overlying planned dummy supports and to form openings to extend said planned vias;depositing a third isolation layer overlying said second silicon nitride layer and said second isolation layer;patterning said third isolation layer to form openings for planned metal pixels;etching through said second isolation layer and said first isolation layer to complete said vias and said dummy supports;depositing a metal layer overlying said third isolation layer and filling said vias and said metal pixels;polishing down said metal layer to the top surface of said third isolation layer to complete said metal pixels; andcompleting said liquid crystal display integrated circuit device.