Solid electrolytic capacitor

摘要

A solid electrolytic capacitor comprises a capacitor element (20) having an anode (1) of a valve action metal, an oxide film layer (2) formed on the surface of the anode (1), a solid electrolytic layer (3) formed on the oxide film layer (2) and a cathode electrically connected to the solid electrolytic layer (2), and also a packaging resin (8) formed to cover the capacitor element (20). An intermediate layer (9) to relieve stress is arranged in at least one part of the interface between the cathode and the packaging resin (8). The intermediate layer (9) is deformed and/or peels to relieve stress caused by heat applied while mounting the capacitor element (20) on a substrate.