Siemens Aktiengesellschaft

Klaus Otto

Horst Kippenberg

Thomas Moser

Tibor Salanki

Josef Unterlass

Johann Ramler

Ralf-Dieter Krause

Georg Behringer

Erich Ross

Wilfried Heide

Friedrich Muller

The invention relates to a method for the production of a filled layer component made out of a monolithic ceramic body by impregnating a ceramic layer body of dense and porous layers with liquid impregnating material which wets the ceramic and by applying contacts. According to the invention the contacts are applied following the impregnation process without any further intermediate steps, and an electrical bonding of the contacts to the metal filler takes place.

Method for the production of a component with a filled layer

A sintered monolithic ceramic body of a filler layer component has cavities which are open at end faces alternating from layer to layer and which has openings toward the lateral faces. The cavities contain ceramic particles distributed in the volume to provide support elements and the cavities are completely filled with a metal or metal alloy having a melting temperature considerably lower than the sintering temperature of the ceramic body. The metal or metal alloy exhibits the property of wetting the surfaces of the ceramic layers in the cavity in its molten condition. Contacts are applied at the end faces of the ceramic body and the openings in the lateral faces of the body are limited so that the contacts do not electrically contact the metal or metal alloy filling at the lateral faces.

Filler layer electrical component and method for the manufacture thereof

The invention relates to a filler layer component for a monolithic ceramic body having a ceramic layer structure of dense and porous layers which is impregnated with a metallic material. According to the invention, one selects as impregnating material a metal or alloy which in its liquid state wets the ceramic. This may be in particular a lead-indium, a copper-indium, or a silver-indium alloy in which the indium content is greater than 0.5%.

Filled layer component made out of a monolithic ceramic body

The invention relates to a filled layer component made out of monolithic ceramic, in particular a capacitor, having a ceramic layer structure of dense and porous layers which is impregnated with a metallic material and is provided with contacts on the outer faces. According to the invention, the contacts have at least on their surfaces enrichments with constituents which form with the material of the contacts one or more intermetallic compounds which are largely insoluble in the impregnating material. These enrichments can be applied in a first manufacturing method before the impregnation process, or in another manufacturing method during the impregnation process.

Component with filled layers and electrical contacts and methods for its

For the production of tin-graphite or respectively tin/lead-graphite layers, it is known to electrodeposit a tin or respectively tin/lead layer and to mechanically incorporate graphite in the boundary zone. In accordance with the method of the invention, the tin-graphite or tin/lead-graphite layer is produced electrolytically in a single operation, operating with an electroplating bath on a strongly acid basis in which graphite powder is dispersed by means of an acid-stable wetting agent, and at temperatures of up to 35.degree. C. In the respective electroplating bath the solution has a pH value equal to or less than 2 and contains in acid-stable wetting agent for graphite.

Baths for the electrodeposition of tin-graphite or tin/lead-graphite

A cooling capsule for a thyristor wherein the capsule is provided with a metallic core having at least one heat transfer surface and with a plurality of bores extending between surfaces of the core so as to form a meander-line-like flow path therethrough between an inlet opening and an outlet opening. The aforesaid surfaces between which the bores extend are provided with recesses each of which connects adjacent pairs of bores and the capsule is further provided with plate-like members, each of which covers a recess and is joined thereto by electron beam welding.

Growing community of inventors

Nuremberg, Germany

Klaus Otto