Patent ID: 7892720
Filing Date: 2011-02-22
Classification: G03F,Y10S,Y10T

Abstract:
1. A fluorinated aromatic resin film having a concavo-convex shape, which is obtained by coating a substrate with a negative photosensitive fluorinated aromatic resin composition to form a negative photosensitive fluorinated aromatic resin composition film, followed by exposure and development, wherein the negative photosensitive fluorinated aromatic resin composition comprises the following fluorinated aromatic prepolymer, at least one photosensitizer and at least one solvent, wherein the fluorinated aromatic prepolymer is obtained by subjecting either one or both of a compound (Y-1) having a crosslinkable functional group (A) and a phenolic hydroxyl group, and a compound (Y-2) having a crosslinkable functional group (A) and a fluorinated aromatic ring, to a condensation reaction in the presence of a HF-removing agent, with a fluorinated aromatic compound (B) represented by the following formula (1): wherein n is an integer of from 0 to 3, each of a and b which are independent of each other, is an integer of from 0 to 3, each of Rf and a compound (C) having at least 3 phenolic hydroxyl groups, and which has crosslinkable functional groups (A) and ether bonds and has a number average molecular weight of from 1×10