Patent ID: 9711681
Date: 2017-07-18
CPC Classifications: H01L

Claim:
1. A nitride semiconductor comprising: a nitride semiconductor part having a first conductivity; a quantum well active layer structure part; and a nitride semiconductor part having a second conductivity, said second conductivity being a conductivity opposite of said first conductivity, which are stacked in this order on a nitride principal surface of a base, wherein the principal nitride surface of the base is a nonpolar nitride surface, wherein said nitride semiconductor part having a first conductivity comprises a first nitride semiconductor layer and a second nitride semiconductor layer, which are stacked in this order, wherein a photoluminescence lifetime (τ(PL)) of said quantum well active layer structure part, as determined by time-resolved PL measurement at room temperature under low excitation density condition, is 1.0 ns or more, and wherein said base is a GaN self-supporting substrate.