Patent ID: 8753793
Filing Date: 2014-06-17
Classification: C08F,G03F

Abstract:
1. A method for producing a resin solution for photoresists, the method comprising 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, wherein, in the step of heating and thereby aging the solution at 30° C. to 90° C. for 30 minutes or longer, the solution containing the photoresist resin capable of being alkali-soluble by the action of an acid has a solids concentration of 3 to 40 percent by weight.