| abstract |
[Problem] To provide a composite member which makes it possible to simplify the formation of a fine wiring line and/or improve the quality of the fine wiring line.n[Solution] A composite member 100, which is one aspect of the present invention, is so configured that: multiple island-shaped aliphatic polycarbonate-containing layers are arranged on a base material; when at least the surface of each of the multiple island-shaped aliphatic polycarbonate-containing layers is exposed to ultraviolet light containing a wavelength of 180 to 370 nm inclusive for 15 minutes, the contact angle between the surface and pure water is 50° or more; and, in at least a part of regions formed between the precursor layers on the base member, a metallic ink is provided on the base material. |