Metal-ceramic substrate and method for producing the metal-ceramic substrate: Fid-Bau Portal

Metal-ceramic substrate and method for producing the metal-ceramic substrate

SCHMIDT KARSTEN / MEYER ANDREAS / LEGATH ALEXANDER / SCHMIRLER MARTINA

The invention relates to a metal-ceramic substrate and to a method for the production thereof. The substrate comprises at least one ceramic layer (2) having a first and second surface side (2a, 2b), at least one of the surface sides (2a, 2b) of which is provided with metallisation (3, 4), wherein the ceramic material forming the ceramic layer (2) contains aluminium oxide, zirconium dioxide and yttrium oxide. The ceramic layer (2) particularly advantageously contains aluminium oxide, zirconium dioxide and yttrium oxide in the following proportions, in each case in relation to the total weight thereof: 2-15% by weight of the zirconium dioxide, 0.01-1% by weight of the yttrium oxide and 84-97% by weight of the aluminium oxide, wherein the average grain size of the aluminium oxide used is between 2 and 8 micrometres and the ratio of the length of the grain boundaries of the aluminium oxide grains to the total length of all the grain boundaries is greater than 0.6.

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