Patent ID: 8584924

Claim:
A process for producing a metal-ceramic substrate comprising a ceramic layer and a structured metal layer with conductive tracks and contact surfaces on at least one surface side of the ceramic layer and further comprising at least one brazing resist coating applied to the structured metal layer, the process comprising the following steps: a) applying at least one metal layer to at least one surface side of the ceramic layer by high temperature bonding at a bonding process temperature higher than 650° C. for forming at least one metal layer on the ceramic layer, b) after applying the at least one metal layer to the at least one surface side of the ceramic layer, structuring the at least one metal layer on at least one surface side of the ceramic layer for forming the structured metal layer with conductive tracks and contact surfaces, c) after structuring the at least one metal layer, applying the at least one brazing resist coating to the structured metal layer, the at least one brazing resist coating having a thickness of between 0.5 and 100 microns and being formed by an epoxy resin-based resist, d) after applying the at least one brazing resist coating to the structured metal layer, removing metal from the structured metal layer in an amount of 0.1-20 microns at least in surface areas bordering the brazing resist coating, and e) after applying the brazing resist coating, leaving the at least one brazing resist coating on the structured metal layer of the metal-ceramic substrate produced by the steps (a) to (d).