Patent ID: 6911351

Claim:
A method of fabricating a nitride semiconductor device comprising the steps of: forming a first nitride semiconductor layer on a substrate; forming, in an upper portion of said first nitride semiconductor layer, plural grooves extending at intervals along a substrate surface direction; forming a mask film for covering bottoms of said grooves; growing, by using, as a seed crystal, C planes corresponding to portions of a top face of said first nitride semiconductor layer exposed from said mask film between said grooves, a lamination body including a second nitride semiconductor layer, an active layer formed from a third nitride semiconductor layer having a smaller energy gap than said second nitride semiconductor layer and a fourth nitride semiconductor layer having a larger energy gap than said active layer stacked in this order from a substrate side; and forming, on said lamination body, a current confinement part for selectively injecting carriers into said active layer.