Patent ID: 8021920

Claim:
A method for producing a metal-ceramic-substrate for electric circuits and modules comprising at least one first power circuit substrate part and at least one low power circuit substrate part, the method comprising the steps of: providing a ceramic layer having a thickness in a range between 0.2-2 mm, bonding metal layers of a first type with a thickness in a range between 0.1 and 0.9 mm to opposed surface sides of the ceramic layer by a direct copper bonding process or by an active soldering process, bonding an insulating layer with a thickness of 0.015-0.15 mm to a surface of at least one support area formed by the at least one metal layer of the first type by applying a glass-containing paste on said at least one support area and then drying and baking on at a temperature between 750° C. and 1030° C., and providing at least one structured metallic layer of a second type with a thickness of 0.015-0.15 mm on the insulating layer by applying and baking on a paste comprising at least one metallic constituent at a temperature between 750° C. and 1030° C.