Patent ID: 8304269

Claim:
A method of fabricating a group III nitride semiconductor device, comprising the steps of: preparing a group III nitride semiconductor substrate made of a group III nitride semiconductor and having a primary surface; supplying a first donor, a group III source and a nitrogen source to a growth reactor to grow a first conductive type gallium nitride based semiconductor layer on the primary surface of the group III nitride semiconductor substrate, the first conductive type gallium nitride based semiconductor layer including a second donor, the second donor being different from the first donor, and the second donor being oxygen; supplying a group III source and a nitrogen source to the growth reactor to grow a light emitting layer on the first conductive type gallium nitride based semiconductor layer; and supplying a group III source and a nitrogen source to the growth reactor to grow a second conductive type gallium nitride based semiconductor layer on the light emitting layer, the primary surface having one of semi-polarity and non-polarity, oxygen in the first conductive type gallium nitride based semiconductor layer being provided as an impurity contained in at least one of the group III source and the nitrogen source, and the primary surface of the group III nitride semiconductor substrate forming a finite angle with a reference plane, the reference plane being orthogonal to a reference axis, and the reference axis extending in a direction of a c-axis of the group III nitride semiconductor.