Patent ID: 6464739
Filing Date: 2002-10-15
Classification: H01G

Abstract:
A process of producing an anode for an electrolytic capacitor, the anode comprising a porous body joined to a valve metal substrate, the porous body having micropores and a dielectric layer disposed therein, the micropores having an electrolyte filled therein, said process comprising:forming a plurality of porous preforms from a powder of valve metal, each of the porous preforms having a shape of a plate or sheet; laminating the plurality of porous preforms to form a laminate; and sintering the laminate to sinter layers incorporated in the laminate to make the porous body, wherein the sintered laminate comprises at least one smaller micropore-size region disposed between larger micropore-size regions, which form electrically conductive passages from the smaller micropore-size region to side surfaces of the porous body.