Patent ID: 9259668
Filing Date: 2016-02-16
CPC Classification: B01D,B01J,C08K

Claim Text:
1. A cleaning method of an immersion liquid, comprising: supplying an immersion liquid on a surface of a cleaning substrate, the immersion liquid being to be used in a liquid immersion lithography apparatus, the cleaning substrate having a substrate and an organic film laminated on a top face side of the substrate; and allowing the immersion liquid to move on the cleaning substrate to remove contaminants from the immersion liquid, wherein the organic film is made from a composition comprising: a first polymer; a compound component; and a solvent, wherein the compound component consists of at least one compound selected from the set consisting of a first compound having at least two groups represented by formula (1), a second compound having a group represented by formula (2) and a third compound having a group represented by formula (3), wherein, in the formula (1), R wherein, in the formula (2), each of R wherein, in the formula (ii), each of R R wherein, in the formula (3), each of R