Composition containing fluorinated polymer and method for producing fluorinated polymer film-provided substrate

A composition comprising a fluorinated polymer having an alicyclic ring, and a solvent, wherein the solvent has a dielectric constant of at least 5 and comprises a solvent X which is a perfluoro compound, a solvent Y which is at least one of a hydrofluorocarbon and a hydrofluoroether, and a solvent Z which is a fluorinated alcohol, and

• at least one of the solvent X, the solvent Y, and the solvent Z has a boiling point of at least 150° C., wherein
• the solvent X is at least one selected from the group consisting of heptacosafluorotributylamine;
• 1,1,2,2,3,3,4,4,4a,4b,5,5,6,6,7,7,8,8,8a,9,9, 10,10,10a-tetracosafluorophenanthrene;
• 1,1,2,2,3,3,4,4,4a,4b,5,5, 6,6,7, 7,8,8,8a,9,9,9a-docosafluorofluorene;
• 1,1,2,2,3,3,4,4,4a,5,5,6,6,7,7,8,8a-heptadecafluorodecahydro-8-(trifluoromethyl)naphthalene;
• and perfluorotripentylamine,
• the solvent Y is 1,1,1,2,3,4,4,5,5,5-decafluoro-3-methoxy-2-(trifluoromethyl)pentane, and
• the solvent Z is at least one selected from the group consisting of hexafluoro-2 -propanol (HFIP);
• 2,2,2-trifluoroethanol (TFEO);
• and 2,2,3,3,3-pentafluoro-1-propanol.