Method of making an electrolytic capacitor and electrolytic capacitor made thereby

Claim 1

An electrolytic capacitor comprising a compact unsintered body as an anode structure, said body having particles of a tantalum metal powder, each particle being composed of plural intertwined particle elements which serve as plural protruding parts protruding from the particle, and an electrically insulating lubricant-binder material selected from the group consisting of Al 2 O 3 , SiO 2 , MgF 2 , CaF 2 , MoS 2 , BaSO 4 , glass, quartz and fluoro ethylene polymer, said metal powder and lubricant-binder material being compressed together to an extent sufficient to bind said particles securely to each other; a conductive wire partially embedded in said compact body and in electrical contact with some of the particles of said valve metal powder; a dielectric insulating film on the surface of the particles of said valve metal powder and the embedded part of said conductive wire, said body having interstices therein among the bound together particles, the lubricant-binder material, the embedded part of said conductive wire and said dielectric insulating film; a conductive material substantially filling said interstices and covering the outer surface of said compact body; and a further conductive material on said compact body which is in electrical contact with said conductive material.