Low profile solid electrolytic capacitor

A low-profile solid electrolytic capacitor with a porous anode body and selective cathode coating addresses the challenge of achieving high capacitance density and volumetric efficiency, providing superior electrical performance for miniaturized capacitors in electronic and medical applications.

WO2026112106A1PCT designated stage Publication Date: 2026-05-28KYOCERA AVX COMPONENTS CORP
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
KYOCERA AVX COMPONENTS CORP
Filing Date
2025-11-19
Publication Date
2026-05-28

AI Technical Summary

Technical Problem

Existing silicon trench capacitors fail to achieve a high capacitance density while maintaining volumetric efficiency, primarily due to the correlation between trench depth and capacitance, which limits their suitability for miniaturized capacitors required in emerging electronic and medical applications.

Method used

A solid electrolytic capacitor with a thickness of 1,000 µm or less, comprising a porous anode body on a valve metal substrate, a dielectric layer, and a cathode coating, where the anode substrate is partially free of the cathode coating, allowing for a low profile design with improved electrical properties.

Benefits of technology

The capacitor exhibits excellent electrical properties, including low leakage current, high breakdown voltage, and broad frequency attenuation, making it suitable for high-speed switching and DC power filtering applications.

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Abstract

A solid electrolytic capacitor having a thickness of about 1,000 µm or less is provided. The capacitor comprises a capacitor element comprising an anode component comprising a porous anode body disposed on a surface of an anode substrate. The anode substrate is formed from a valve metal composition and the porous anode body is formed from a sintered powder containing a valve metal composition and having a thickness of about 650 µm or less. The capacitor element further comprises a cathode coating disposed over a dielectric and the porous anode body. The cathode coating comprises a solid electrolyte containing conductive polymer particles, wherein at least a region of the anode substrate is free of the cathode coating. An anode termination is electrically connected to the region of the anode substrate that is free of the cathode coating, and a cathode termination is electrically connected to the cathode coating.
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Citation Information

Patent Citations

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