Patent ID: 6204168
Filing Date: 2001-03-20
Classification: H01L,Y10S

Abstract:
A method of fabricating a damascene structure comprising the steps of:providing a substrate;depositing a first insulative layer upon said substrate;depositing a first layer of silicon-based photosensitive material upon said first insulative layer;patterning said first layer of silicon-based photosensitive material to define a via in said first silicon-based photosensitive material layer;depositing a second insulative layer upon said patterned first layer of silicon-based photosensitive material;depositing a second layer of silicon-based photosensitive material atop said second insulative layer;patterning said second layer of silicon-based photosensitive material to define a trench in said second silicon-based photosensitive material layer;etching said second insulative layer to transfer the trench therein, wherein the first layer of silicon-based photosensitive material functions as an etch stop for defining the trench in the second insulative layer; andetching the first insulative layer to transfer the via therein, wherein the first layer of silicon-based photosensitive material functions as a hard mask for defining the via in the first insulative layer.