Patent ID: 7135347

Claim:
A method for manufacturing a nitride film including a high-resistivity GaN layer, comprising: a step of allowing a Group-III source gas containing an organic metal compound that is a gallium source, a Group-V source gas containing ammonia that is a nitrogen source, a carrier gas for the Group-III source gas, and a carrier gas for the Group-V source gas to flow over a predetermined monocrystalline wafer maintained at 1,000° C. or more; and a step of epitaxially growing a nitride film, including a GaN layer, on the monocrystalline wafer by a vapor phase reaction of the source gases, wherein at least one of the carrier gases contains nitrogen while the wafer temperature is being increased before the reaction is carried out, and at least one of the carrier gases contains hydrogen and nitrogen and has a total hydrogen and nitrogen content of 90 percent by volume or more in at least one part of the epitaxially growing step.