Liquid phase silylation of a bilayer resist system using blended deep-UV resists
0.275 ?m packed and 0.20 ?m isolated features have been printed with a positive acting top-surface imaging process. The process consists of a bilayer resist scheme, the top layer of which is a chemically amplified negative resist whose resin is a blend of both novolak and poly(vinyl phenol). The latter, after exposure and post-exposure bake, is silylated in the liquid phase and the latent positive images are resolved using an oxygen plasma etch.
bilayer resist system blended deep-uv resists top-surface imaging chemically amplified negative resist optical lithography deep-uv lithography liquid-phase silylation