Fluoropolymer solutions for large protective films, large protective films and large protective membranes

Abstract

The purpose of this invention is to provide a fluoropolymer solution for large protective films, a large protective film, and a large protective film that can inexpensively produce large protective films with less film thickness unevenness and excellent appearance after solvent drying, without requiring the same level of solvent selection and use as in conventional LSI methods. This invention provides a fluoropolymer solution for large protective films, a large protective film, and a large protective film. The fluoropolymer solution for large protective films is a polymer solution for protective films with a fluoropolymer as the main component, used for large protective films with an area of ​​1000 cm² or more. The invention is characterized in that, in a polymer solution with a wet film thickness of 30 μm or more and a dry film thickness of 2 μm to 10 μm coated and formed on a substrate, the purity of the main component used as the solvent is 80% or more, or the boiling point range of the solvent used is within ±30°C.