Patent ID: 7141497

Claim:
An MOCVD method comprising: supplying a process raw material into a process chamber that accommodates a target substrate while exhausting the process chamber; and causing the process raw material to decompose in the process chamber, and forming an epitaxial film on the target substrate from components thereby provided, supply of the process raw material comprising; supplying a carrier gas into a bubbling unit, which stores an organic metal raw material in a liquid state, at a flow rate controlled by a flow rate control portion, and causing the organic metal raw material to bubble up by the carrier gas, and supplying a mixture of the organic metal raw material with the carrier gas thereby obtained into the process chamber, wherein the flow rate control portion comprises a plurality of mass flow controllers, which are disposed in parallel with each other and have full-scales different from each other for flow rate control, such that the plurality of mass flow controllers are switched for use, in accordance with the carrier gas flow rate.