A solid electrolytic capacitor having excellent electrical characteristics due
to an insulating protective layer. A water-shedding silicone rubber that cures
by moisture or heat energy is coated to form the insulating protective layer on
a protruding portion of a valve metal foil, at a protruding portion on the end
surface of a porous valve metal body and on the surface of a dielectric layer covering
the protruding portion of the valve metal foil.
