Patent ID: 9640621
Date: 2017-05-02
CPC Classifications: C03C,H01L

Claim:
1. An article comprising a glass-ceramic substrate; and a layer comprising a III-V semiconductor disposed on a surface of the substrate, wherein the substrate comprises a cordierite-enstatite (SiO 2 —Al 2 O 3 —MgO—TiO 2 ) material having a coefficient of thermal expansion (GTE) of 60×10 −7 ±5×10 −7 , and further wherein the cordierite-enstatite material comprises in weight percent: 40-55 SiO 10-15 Al 20-30 MgO; 1-5 CaO; and 5-15 TiO wherein the III-V semiconductor is GaN, GaP, AlGaAs, InGaAs, InGaN, AlGaP, or a combination thereof.