Patent ID: 7518216

Claim:
A method of forming, by organometallic hydrogen chloride VPE, iron-doped gallium nitride for a gallium nitride baseplate, comprising the steps of: forming a reaction product containing iron by reacting, at a temperature of at least 300° C., gaseous ferrocene or dimethylferrocene with hydrogen chloride gas; and supplying into a reaction tube the reaction product gas entrained in H 2 gas is used as a carrier gas, together with a first gas containing elemental nitrogen, and a second gas containing elemental gallium, with the ratio (P Fe /P Ga ) of the partial pressure (P Fe ) of the reaction product gas to the partial pressure (P Ga ) of the second gas being at least 0.5, so as to form on a substrate a gallium nitride region into which iron has been introduced.