CERAMIC SUBSTRATE, MANUFACTURING METHOD THEREOF, AND POWER MODULE

WIPO Patent Application WO/2016/029762

A1

A ceramic substrate, a manufacturing method thereof, and a power module comprising the ceramic substrate. The ceramic substrate comprises a core layer and a plurality of surface layers, optionally it further comprises a plurality of transition layers. The core layer is made of zirconia toughened alumina; the surface layers symmetrically located on the upper and lower surfaces of the core layer are made of Al 2O 3; and the transition layers symmetrically located between the surface layer and the core layer are made of zirconia toughened alumina. The core layer has a chemical composition of 0wt%