Nippon Chemi-Con has been granted a patent for a solid electrolytic capacitor featuring a valve metal cathode with an oxide and carbon coating, and a valve metal anode with a dielectric layer. This design enhances capacitance, reduces ESR, and improves high-frequency performance and high-temperature endurance. GlobalData’s report on Nippon Chemi-Con gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Nippon Chemi-Con, Hydrogen storage alloys was a key innovation area identified from patents. Nippon Chemi-Con's grant share as of June 2024 was 41%. Grant share is based on the ratio of number of grants to total number of patents.
Solid electrolytic capacitor with enhanced performance characteristics
The patent US12009158B2 describes a solid electrolytic capacitor that features a unique construction aimed at enhancing performance. The capacitor comprises a cathode and an anode, both made from valve metals, with the cathode including an etching pit and an oxide layer. A carbon coating layer is applied to the oxide layer, which contains carbon particles that penetrate the oxide layer and connect with the cathode substrate. Notably, the average length of the entry area of the carbon coating layer is specified to be at least one-fifth of the average length of the etching pit. The design aims to achieve a low interface resistance at the cathode, ideally 10 mOcm² or less, which is critical for efficient capacitor operation.
Additionally, the patent outlines a method for manufacturing this solid electrolytic capacitor. The process includes applying a carbon slurry containing carbon particles to the oxide layer of the cathode substrate, followed by a pressing step that ensures the carbon particles penetrate the oxide layer and fill the etching pit. The anode is formed by oxidizing the surface of a valve metal substrate to create a dielectric layer, while a solid electrolyte layer with a conductive polymer is placed between the cathode and anode. The method emphasizes the importance of the carbon particle size, ensuring they are too large to enter the etching pit, which contributes to the capacitor's overall performance and reliability.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
