Patent ID: 7897324
Filing Date: 2011-03-01
Classification: G03F

Abstract:
1. A method of lithographic patterning, comprising: applying to a surface to be patterned a photoresist comprising a polymer resin, a photocatalyst generator which generates a catalyst on exposure to actinic radiation, and a quencher, wherein the quencher comprises 11-20% of the photoresist by weight; and exposing the photoresist to actinic radiation through a mask pattern; followed, in either order, by carrying out a post-exposure bake; and developing the photoresist with a developer to remove a portion of the photoresist which has been exposed to the actinic radiation; wherein the polymer resin is substantially insoluble in the developer prior to exposure to actinic radiation and rendered soluble in the developer by the action of the catalyst, and wherein the polymer resin is crosslinked by the action of the quencher during the bake.