Patent · US Expired

Method for directly joining metal pieces to oxide-ceramic substrates

US4483810A · kind A · utility

28Cited by

1References

15Claims

0Family size

Assignee

Brown, Boveri & Cie AG · DE

Inventors

Klaus Bunk · Ahlhorn, DE
Arno Neidig · Plankstadt, DE
Georg Wahl · Rodenbach, DE
Helmut Keser · Birr, CH

Key dates

Filing date	Feb 4, 1983
Grant date	Nov 20, 1984
Priority date	—
Expiry date	Feb 4, 2003

Classification

Technology area (CPC H)Electricity
CPC primaryH05K3/38
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.