ABRASIVE PROCESS FOR MODIFYING CORNERS, EDGES, AND SURFACES OF CAPACITOR ANODE BODIES

摘要

Porous sintered anode 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 pressed, 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 removes surface imperfections resultant from the pressing process, both of which enhance cathode layer uniformity.