Patent ID: 9152052
Filing Date: 2015-10-06
Classification: G03F,H01L

Abstract:
1. A composition for forming a tungsten oxide film, comprising water, a water-soluble metatungstate, and at least one additive selected from the group consisting of anionic polymers, nonionic polymers, anionic surfactants, and tertiary amino group-containing nonionic surfactants; said composition being used for forming an image reversal trilayer structure, a resist undercoat layer or a resist top protective film wherein said additive is an anionic polymer represented by the following formula (1): in which each Z is independently hydrogen, methyl or fluorine; L is a divalent linking group selected from the group consisting of single bond, a hydrocarbon group which may contain an oxygen atom provided that the total number of carbon and oxygen atoms is in the range of 1 to 6, and a group in which at least one hydrogen atom in said hydrocarbon group is replaced with a fluorine atom; and A is —COOM or —SO