Patent ID: 8850700

Claim:
A method for making a wiring board, comprising: a step of applying a first conductive material on at least a protruding feature of a first mold that has protruding and recessed features; a step of forming a plurality of first wirings as electrodes of a transistor by pressing the first mold against an adhesive surface of a substrate so as to transfer the first conductive material on the protruding feature onto the adhesive surface of the substrate, the plurality of first wirings having a penetrating hole extending in a direction perpendicular to the adhesive surface; a step of forming an active layer of the transistor by applying an organic semiconductor on the plurality of first wirings; and a step of forming a second wiring by applying a second conductive material on a surface of the plurality of first wirings, a first portion of the adhesive surface that forms part of the penetrating hole in the plurality of first wirings, and a second portion of the adhesive surface near the penetrating hole but outside the first portion, wherein, among segments of the second wiring that can exist inside the penetrating hole, the longest segment parallel to a width of the plurality of first wirings has a length of 10% or more but 90% or less of the width of the plurality of first wirings, wherein the substrate includes an adhesive layer whose surface is the adhesive surface, wherein the adhesive layer consists essentially of poly-2-vinylnaphthalene, and wherein the active layer and the adhesive layer contact each other between the plurality of first wirings.