China rare metal mateial co.,ltd offer a serious of substrate for PVD and CVD thin film. CRM's substrate have some standard size and also can offer by your needs.

High Temperature Superconducting  Substrates
Al2O3, LSAT, SrTiO3, MgO, Sr LaAlO4,  YSZ, KTaO3, NdGaO3
Magnetism and Ferroelectric  Film Substrates
LaAlO3 LSAT(LaAlO₃)_0.3(Sr2AlTaO₈)_0.7  Nb:SrTiO3 SrTiO3 MgO Al2O3 MgAl2O4 GGG Ti02
GaN Substrates
Al2O3, MgAl2O4, LSAT, LiGaO2, ZnO, SiC LiAlO2, MgO
Semiconductor Substates
Si,Ge, GaP, GaAs, GaSb, InP, InAs