Chip-shaped solid electrolytic capacitor

The invention provides a chip type solid electrolytic capacitor which has low manufacturing cost, less occurrence of current leakage and high rate of good product. The electrolytic capacitor of the invention comprises an aluminum foil body, the surface of which is etched and the upper surface and lower surface of which are provided with micro pores; the upper surface and the lower surface of the aluminum foil body are respectively an oxide scale film layer, and an isolation layer separates the aluminum foil body into an anode area and a cathode area; the upper surface of the oxide scale film layer of the cathode area is covered in sequence with a conductive polymer layer, a carbon rubber layer and a cathode conductive rubber; the solid electrolytic capacitor provided by the invention is characterized in that before the upper surface of the oxide scale film layer in the cathode area is covered by the conductive polymer layer, the external surface of the exposed aluminum core layer along the peripheral side sur