Patent ID: 9223213
Filing Date: 2015-12-29
Classification: B01D,C08F,G03F

Abstract:
1. A method of manufacturing a polymer for lithography, comprising: polymerizing one or more monomers in the presence of a polymerization solvent, to obtain a polymerization reaction solution comprising a polymer; purifying the polymer in the polymerization reaction solution by re-precipitation, to obtain a wet powder of a purified polymer; and dissolving the wet powder of the purified polymer in a good solvent; wherein: the purifying comprises filtering at a filtration differential pressure of 50 kPa or more; a solid content of the wet powder of the purified polymer exceeds 40% by mass and is less than 65% by mass; and a temperature of the wet powder is 40° C. or less until the wet powder of the purified polymer is dissolved in the good solvent.