Abrasive process for modifying corners, edges, and surfaces of capacitor anode bodies
US8057883B2 · kind B2 · utility
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13References
19Claims
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Key dates
| Filing date | Nov 7, 2007 |
| Grant date | Nov 15, 2011 |
| Priority date | — |
| Expiry date | Oct 12, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Porous sintered bodies for capacitors formed from valve metals are treated by electrolysis to form a dielectric layer and coated with cathode layers. When standard parallelepiped shapes are used as they were passed, cathode coverage at the sharp corners and edges is non-uniform and failures occur at those locations. Treating pressed anode bodies with an abrasive process alters the sharpness of corners and edges, creating rounded transitions between primary surfaces and remove surface imperfections resultant from the pressing process both of which enhance cathode layer uniformity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.