Abstract:
A polysiloxane resin exhibiting high transparency even at a wavelength of 193nm (particularly 157nm) or below and excellent dry etching resistance, which comprises units represented by the general formula (I) and/or the general formula (II) and has acid−dissociable groups: (I) (II) (wherein R 1 is a fluorinated or fluoroalkylated monovalent aromatic group or a fluorinated or fluoroalkylated monovalent alicyclic group; and R 2 is a monovalent aromatic group described above, a monovalent alicyclic group described above, hydrogen, halogeno, a monovalent hydrocarbon group, haloalkyl, or amino). A radiation−sensitive resin composition excellent in sensitivity and resolution, which comprises (A) the above resin and (B) a radiation−sensitive acid generator.
Abstract:
A radiation-sensitive resin composition comprising: (A) an acid-dissociable group-containing resin, insoluble or scarcely soluble in alkali but becoming soluble in alkali when the acid-dissociable group dissociates, and containing recurring units with specific structures and (B) a photoacid generator of the formula (3), wherein R represents a monovalent aromatic hydrocarbon group, m is 1-8, and n is 0-5. The resin composition is suitable as a chemically-amplified resist responsive to deep ultraviolet rays such as a KrF excimer laser and ArF excimer laser, exhibits high transparency, excellent resolution, dry etching resistance, and sensitivity, produces good pattern shapes, and well adheres to substrates.