A solid electrolytic capacitor that is capable of withstanding laser welding without a significant deterioration in its electrical performance is provided. The method can permit temperature differential between the air supplied to the air passageway and the air introduced into the plenum from the equipment assembly to be 45 F. In the back, spaced cord guides are mounted on said panel. Three cathodes may be mounted on a die flag region to form an electron gun suitable for color CRTs. The gaskets 7 each have an annular portion 7A that is annularly formed so as to extend along the inner periphery of the frame 6 and elongated portions 7B1 to 7B8 that extend from the annular portion 7A and come into contact with the side faces of an associated electrode layer 5C after passing over the inner periphery of the frame 6 and a peripheral region 5D of a polymer electrolyte membrane.