Patent ID: 7601478

Claim:
A method for forming a patterned film of a pentacene compound comprising: writing a pattern on a film of 6,13-ethanopentacene-6,13-dione represented by formula (2) by light irradiation; and removing a part of the film not exposed by the light irradiation using chloroform, so that only the pattern written by the light irradiation remains: wherein each of R 2 and R 4 denotes a hydrogen atom, an alkyl group, an alkoxy group, an ester group or a phenyl group; and each of R 5 to R 12 denotes one or more substituents selected from the group consisting of a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, an aralkyl group, a phenoxy group, a cyano group, a nitro group, an ester group and a halogen atom.