Multilayered piezoelectric actuator

摘要

An electronic component such as a piezoelectric component, a chip capacitor, or a chip inductor, comprises a substrate (10) having a through hole (40) formed in a thickness direction thereof; and a conductor (31), disposed in the through hole, for electrically connecting one side of the substrate to the other side thereof. The through hole has a major axis diameter (D3) and a minor axis diameter (D4) on at least one of one side and the other side of the substrate.