Methods of manufacturing a hermetically sealed wet electrolytic capacitor and a hermetically sealed wet electrolytic capacitor

US10522298B2 · kind B2 · utility

Assignee

• VISHAY SPRAGUE, INC. · US

Inventors

• Alex Eidelman · Beer Sheva, IL
• John Evans · Hayward, US
• Stephen Breithaupt · North Bennington, US
• Sarah Lastella · Troy, US
• Edward Fairfield · Hopkinton, US
• Ilia Skatkov · Beer Sheva, IL
• Vicki Segel · Beer Sheva, IL
• Pavel Vaisman · Beer Sheva, IL
• Hila Eshel · Beer Sheva, IL

Key dates

• Filing date: Mar 17, 2017
• Grant date: Dec 31, 2019
• Expiry date: Mar 17, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01G9/145
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

Methods of manufacturing a hermetically sealed wet electrolytic capacitor and a hermetically sealed wet electrolytic capacitor are described. A method of manufacturing a wet electrolytic capacitor includes forming a cathode of the capacitor by forming a case comprising a metal substrate, the metal substrate having an alloyed surface, depositing a smooth film comprising palladium and copper as a tacking layer on the alloyed surface of the metal substrate, and depositing a rough, high surface area layer on the tacking layer to achieve a high capacitance cathode. A first terminal is electrically connected to the cathode. An anode is formed. A second terminal is electrically connected to the anode. An electrolytic solution is disposed within the case, and the case is hermetically sealed.