主权项 |
1. A production method of a solid electrolytic capacitor for producing a box sealed type solid electrolytic capacitor equipped with a box-shaped case in which a peripheral side wall is formed upright on an outer peripheral edge portion of an inner surface of a bottom wall and an upper opening section of the peripheral side wall is closed by an upper lid, and a capacitor element accommodated inside the box-shaped case,
the method comprising: a step of preparing a bottom wall substrate in which a plurality of bottom wall structural portions capable of constituting the bottom wall are provided continuously; a step of forming inner cathode anode circuit patterns and outer cathode anode circuit patterns on an inner surface and an outer surface of each bottom wall structural portion of the bottom wall substrate, respectively, and electrically connecting the inner cathode anode circuit patterns and the outer cathode anode circuit patterns; a step of preparing a peripheral side wall substrate provided with a plurality of through-holes in an arrangement corresponding to the plurality of bottom wall structural portions; a step of attaching the peripheral side wall substrate to an inner surface of the bottom wall substrate so that the inner cathode anode circuit patterns of each bottom wall structural portion of the bottom wall substrate are respectively arranged in each through-hole of the peripheral side wall substrate; a step of preparing, as the capacitor element, a capacitor element in which an anode part is constituted by an anode lead protruded from a front end forward and a cathode part is provided on at least lower surface; a step of fixing the capacitor element to an inner surface of each bottom wall structural portion of the bottom wall substrate and electrically connecting cathode anode parts of each capacitor element to the inner cathode anode circuit patterns of each bottom wall structural portion; a step of obtaining a capacitor continuous member in which a plurality of capacitor structural portions capable of constituting the solid electrolytic capacitor are provided continuously by attaching an upper lid substrate on the peripheral side wall substrate so as to close the upper opening section of each through-hole of the peripheral side wall substrate; and a step of obtaining a plurality of solid electrolytic capacitors by cutting the capacitor continuous member every each capacitor structural portion. |