Electrolytic capacitor and method for production thereof
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsKyohei Iwaoka, Makoto Nagashima, Syusaku Koie
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Abstract
An electrolytic capacitor includes a capacitor element. The capacitor element includes an anode body, a dielectric layer that covers at least a part of the anode body, a solid electrolyte layer that covers at least a part of the dielectric layer, and a cathode lead-out layer that covers at least a part of the solid electrolyte layer. The cathode lead-out layer includes a carbon layer and a silver-paste layer. The carbon layer is conductive and covers at least a part of the solid electrolyte layer. And the silver-paste layer covers at least a part of the carbon layer. The carbon layer contains carbon particles and silver.
Claims12
An electrolytic capacitor comprising a capacitor element, the capacitor element including:
- an anode body;
- a dielectric layer that covers at least a part of the anode body;
- a solid electrolyte layer that covers at least a part of the dielectric layer;
- and
- a cathode lead-out layer that covers at least a part of the solid electrolyte layer, wherein:
- the cathode lead-out layer includes a carbon layer and a silver-paste layer, the carbon layer being conductive and covering at least a part of the solid electrolyte layer, the silver-paste layer covering at least a part of the carbon layer,
- the carbon layer contains carbon particles and silver, and is in direct contact with the solid electrolyte layer,
- the carbon particles include flaky particles,
- a gap between the flaky particles in an overlapping state is filled with the silver, and
- a content proportion of the silver in the carbon layer ranges from 8 mass % to 30 mass %, inclusive.
A method for manufacturing an electrolytic capacitor, the method comprising:
- forming a dielectric layer to cover at least a part of an anode body;
- forming a solid electrolyte layer to cover at least a part of the dielectric layer;
- forming a carbon layer by applying carbon paste directly on at least a part of the solid electrolyte layer, the carbon layer being conductive;
- and
- forming a silver-paste layer on at least a part of the carbon layer, wherein:
- the carbon paste contains carbon particles, silver particles, and a dispersion medium,
- the carbon particles include flaky particles,
- a gap between the flaky particles in an overlapping state is filled with silver of the silver particles after the forming of the conductive carbon layer, and
- a proportion of the silver particles in the solid component of the carbon paste ranges from 8 mass % to 30 mass %, inclusive.
Dependencies are inferred from the claim text.