An aluminum nitride (AlN) substrate comprising an AIN sinter, an Al.sub.2 O.sub.3 layer provided on the sinter, and a glass-mixed Al.sub.2 O.sub.3 layer which is provided on the Al.sub.2 O.sub.3 layer and contains Al.sub.2 O.sub.3 and glass mixed therewith, preferably with an oxide particle-dispersed...http://www.google.es/patents/US5780162?utm_source=gb-gplus-sharePatente US5780162 - Aluminum nitride substrate and method of producing the same
Aluminum nitride substrate and method of producing the same
