Positive-working photoresist composition

摘要

A positive-working photoresist composition comprising a water-insoluble alkali-soluble resin, a water-insoluble alkali-soluble low molecular compound, and an ionization-sensitive radioactive compound, said ionization-sensitive radioactive compound comprises a mixture of a naphthoquinonediazidesulfonic diester of a water-insoluble alkali-soluble low molecular compound having three phenolic hydroxyl groups as an ionization-sensitive radioactive compound (A) and a naphthoquinonediazidesulfonic diester of a water-insoluble alkali-soluble low molecular compound having four phenolic hydroxyl groups as an ionization-sensitive radioactive compound (B) in an amount of 30 % or more by weight based on the total amount of said ionization-sensitive radioactive compound.