Method to Reduce Anode Lead Wire Embrittlement in Capacitors
AssigneeKemet Electronics Corporation
InventorsSteven C. Hussey, Yuri Freeman, Christian Guerrero, Chris Stolarski, Jeffrey N. Kelly, Philip M. Lessner, Siva Jyoth Lingala, Javaid Qazi
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Abstract
An improved capacitor, and method of manufacturing the improved capacitor, is provided. The method includes deoxygenating and leaching the anode wire to produce a capacitor comprising an anode having a surface area of at least 4.0 m2/g or a charge density of at least 200,000 CV/g with the anode wire having an equivalent diameter of less than 0.30 mm extending from said anode. A dielectric is on the anode and a cathode is on the dielectric.
Claims32
1-23. (canceled)
A method for forming a capacitor comprising:
- deoxygenating an anode wire to form a deoxygenated anode wire;
- leaching said deoxygenated anode wire to form a deoxygenated and leached anode wire;
- inserting said deoxygenated and leached anode wire into a valve metal powder;
- pressing said valve metal powder into a monolith with said deoxygenated and leached anode wire embedded therein;
- sintering said monolith to form an anode with said deoxygenated and leached anode wire extending from said anode;
- forming a dielectric on said anode;
- and
- forming a cathode on said dielectric.
Dependencies are inferred from the claim text.