Coating compositions for use with an overcoated photoresist
View Patent ↗Underlying coating compositions are provided for use with an overcoated photoresist composition. In one aspect, the coating composition can be crosslinked and comprise one or more components that contain one or more acid-labile groups and/or one or more base-reactive groups that are reactive following crosslinking. In another aspect, underlying coating composition are provided that can be treated to provide a modulated water contact angle. Preferred underlying coating compositions can exhibit enhanced etch rates in plasma etchants. Additional preferred coating compositions can enhance lithographic performance of an associated photoresist composition.
1. A method of forming a photoresist relief image, comprising:
applying a coating composition on a substrate, the applied composition can be treated to provide a different water contact angle, wherein the coating composition layer comprises (i) a first component that comprises an oxygen containing material and (ii) a second component that is separate and distinct from the first component and comprises acid-labile groups or anhydride groups;
applying a photoresist composition above the coating composition layer; and
exposing and developing the photoresist layer to provide a resist relief image.
2. The method of claim 1 wherein the applied coating composition is treated with photoacid from the photoresist layer to provide a decreased water contact angle of the coating composition areas that contact the photoacid.
3. The method of claim 1 wherein the second component comprises acid-labile groups.
4. The method of claim 1 wherein the second component comprises anhydride groups.
5. The method of claim 1 wherein the first component comprises a resin that comprises polymerized acrylate ester units.
6. The method of claim 1 wherein the first component comprises a resin that comprises 3-methoxy-4-acetoxystyrene units, 4-nitrostyrene units, 3-nitrostyrene units or 4-nitrophenylmethacrylate units.