Photoimaging Materials Based on Base-amplifying Silicone Resins Having Phenylsulfonylethyl Groups

Abstract

We reported the concept of base proliferation reactions to enhance the photosensitivity of photopolymer systems using base-catalyzed reactions. The concept involves the base-catalyzed decomposition of a compound, termed a base amplifier, which releases a newborn amine molecule, leading to its autocatalytic decomposition. We designed novel silicone resins tethering base-amplifying units containing phenylsulfonylethyl carbamoyl groups to apply to photoimaging materials. Films of the resin doped with a photobase generator underwent base proliferation reaction which is triggered by a photogenerated amine, leading to nonlinear formation of amino groups in their side chains. As a result, the films provided positive-type photoimaging materials developable with an acidic aqueous solution with high sensitivity.