| 摘要 |
PROBLEM TO BE SOLVED: To provide a specific shape of a nitride semiconductor light emission diode having a high light extraction efficiency.SOLUTION: A nitride semiconductor light emission diode has a triangular shape comprising a side BC, a side CA and a side AB which have a length La, a length Lb and a length Lc respectively in plan view. The corners which confront the side BC, the side CA and the side AB respectively have an angle α, an angle &bgr; and an angle γ, respectively. An angle &thetas; is formed between the c axis and the length direction of the side BC. The length Lb is equal to the length Lc. Any one of the following groups Aa and Ab is satisfied. The group Aa: 20°≤angle α≤40° (Ia) and 0°≤angle &thetas;≤40° (IIa), and the group Ab: 90°≤angle α≤130° (Ib) and 50°≤angle &thetas;≤90° (IIb). |
