Solid electrolytic capacitor and its manufacturing method, and digital signal processing board using the same

A solid-electrolyte capacitor includes: a tabular solid-electrolyte capacitor element having an anode portion and a cathode portion; an anode terminal; a cathode terminal; and an insulating external resin member. The anode terminal is electrically connected to the anode portion at the upper surface side. The cathode terminal is electrically connected to the cathode portion at the upper surface side. The external resin member entirely covers the solid-electrolyte capacitor element with the lower surfaces of the anode terminal and the cathode terminal exposed. The anode terminal and the cathodeterminal are arranged in a proximity of a distance of 3 mm or less from each other. A stepped portion is formed at both sides of the anode terminal and it is connected to the anode portion via this junction surface. A stepped portion is formed at both side of the cathode terminal and it is connected to the cathode portion via this junction surface. The anode junction surface and the cathode junction surface are covered by