The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 1984
Filed:
Feb. 04, 1983
Klaus Bunk, Worms, DE;
Arno Neidig, Plankstadt, DE;
Georg Wahl, Eppelheim, DE;
Helmut Keser, Birr, CH;
Brown, Boveri and Cie AG, Mannheim, DE;
Abstract
Method for the direct joining of metal pieces which have a surface metal oxide layer, to oxide ceramic substrates by heating the ceramic substrates covered with the metal pieces in an oxygen-containing atmosphere to a temperature above the eutectic temperature of the metal and the metal oxide, but below the melting temperature of the metal. The heating is carried out in a continuous heating furnace in a nitrogen atmosphere with an addition of oxygen of 20 to 50 vpm. The cooling-down in the continuous heating furnace takes place after the solidification of the eutectic melt, in a nitrogen atmosphere which has an oxygen content well below the 20 vpm.