Fabrication of Multilayer Ceramic Capacitors by Metal Impregnation

Ceramic units were fabricated having internal porous layers which extend to two edge faces of the units. The porous layers were analogous to the internal noble metal electrode layers of conventional ceramic multilayer capacitors. By impregnating the porous regions with conductive materials such as Ag, Pb, or Sn, capacitors were formed. Scanning electron microscopy was used to examine the structures of the porous regions and of the impregnated metals. An end termination technique was developed for use with injected internal electrodes of low melting point metals Units were made having electrical characteristics similar to conventionally prepared units with noble metal internal electrodes.