Production method of a capacitor
AssigneeShowa Denko K.K.
InventorsKazumi Naito, Katutoshi Tamura
Life of this patent
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Abstract
A method for producing a capacitor having a good capacitance appearance factor and a low ESR comprising, as one electrode (anode), an electric conductor having pores and having formed on the surface thereof a dielectric layer and, as the other electrode (cathode), a semiconductor layer formed on the electric conductor by energization in an electrolytic solution, the method comprising impregnating pores with a semiconductor layer-forming precursor before energization to render the concentration of semiconductor layer-forming precursor in pores higher than that of semiconductor layer-forming precursor in the electrolytic solution; a capacitor produced by the method; and an electronic circuit and an electronic device using the capacitor.
Claims25
A method for producing a capacitor comprising, as one electrode (anode), an electric conductor having pores and having formed on the surface thereof a dielectric layer and, as the other electrode (cathode), a semiconductor layer formed on the electric conductor from a semiconductor layer-forming precursor by energization in an electrolytic solution, the method comprising passing an electric current through the electrolytic solution to form the semiconductor layer on the electric conductor by energization in the electrolytic solution in a state in which the concentration of the semiconductor layer-forming precursor in the pores of the electric conductor is higher than the concentration of semiconductor layer-forming precursor in the electrolytic solution.
Dependencies are inferred from the claim text.