Electronic device having interconnections, openings, and pads having greater width than the openings

An electronic device includes first and second interconnections formed on a first surface of a substrate and spaced apart from each other. The electronic device includes a first insulating material layer disposed on the substrate including the first and second interconnections and including a first opening exposing a predetermined region of the first interconnection. The electronic device further includes a first pad filling the first opening and having a greater width than the first opening. The first pad covers at least a part of the second interconnection adjacent to one end of the first interconnection, and the first pad is electrically insulated from the second interconnection by the first insulating material layer.