Patent ID: 8986918
Filing Date: 2015-03-24
Classification: G03F,Y10S

Abstract:
1. A method of forming a patterned structure on a substrate, comprising: providing a substrate with a material layer; applying a photoresist composition to the substrate to form a photoresist layer on the material layer, the photoresist composition comprising a first photoacid generator having a first activation energy level, a second photoacid generator having a second activation energy level that is different than the first activation energy level, a negative crosslinking agent, and a polymer having a hydrophobic monomer unit and a hydrophilic monomer unit containing a hydroxyl group, wherein at least some of the hydroxyl groups are protected with an acid labile moiety having a low activation energy, and wherein the photoresist is capable of producing a hybrid response to a single exposure such that: patternwise exposing the photoresist layer to radiation; and removing a portion of the photoresist layer with the developer to form the patterned feature in the photoresist layer.