Birch, Stewart, Kolash & Birch, LLP
Method for producing resin solution for photoresist, photoresist composition, and pattern-forming method
Disclosed is a method for producing a resin solution for photoresists, which includes the steps of heating and thereby aging a solution at 30° C. to 90° C. for 30 minutes or longer, the solution containing, in a solvent, a photoresist resin capable of being alkali-soluble by the action of an acid; and filtering the aged solution through a filter medium having a pore size of 1 μm or less. The method gives a photoresist composition having good filterability which enables uniform patterning. The method also gives a resin solution for photoresists which is stable over a long time, namely, a resin solution for photoresists which maintains good filterability even after long-term storage.
Daicel Chemical Industries, Ltd.
C G C C G G
C08F G03F C08F C08F G03F G03F
inventional inventional inventional inventional additional inventional
Masamichi Akira
Nishimura Eguchi