Patent ID: 8822263

Claim:
A hetero epitaxial growth method comprising: forming a buffer layer in contact with a heterogeneous substrate, the heretogeneous substrate composed of a substrate selected from the group consisting of an a-plane sapphire substrate, a silicon substrate, a SiC substrate, a GaAs substrate, a GaP substrate, and a GaN-based substrate; and performing crystal growth of a zinc oxide based semiconductor layer on the buffer layer using a halogenated group II metal and an oxygen material, wherein the step of forming the buffer layer includes the step of performing crystal growth of another zinc oxide based semiconductor layer on the heterogeneous substrate using a group II metal and an oxygen material, and zinc which is an elemental metal without any bonding to another element is used as the group II metal, wherein a reactant gas is zinc and water in the step of forming the buffer layer, and a reactant gas is zinc chloride and water in the step of performing the crystal growth of the zinc oxide based semiconductor layer, and wherein in the step of performing the crystal growth of the zinc oxide based semiconductor layer, a crystal growth temperature is not less than 800 degrees C., and a supplying ratio VI/II of a group VI element and a group II element is more than 1 and not more than 100.