Patent ID: 7615773

Claim:
A semiconductor light-emitting device comprising: a substrate; and an active layer over the substrate, comprising: a well layer consisting essentially of a first surface, a second surface opposite the first surface, and a single region with an unintentionally doping impurity with a concentration of impurities equal to or less than 1×10 17 cm −3 ; a first barrier layer comprising an n-type-impurities-intentionally-doped portion near the well layer, and an n-type-impurities-unintentionally-doped portion distant from the well layer; and a second barrier layer comprising an n-type-impurities-unintentionally-doped portion near the well layer; and wherein the first surface of the well layer is in direct contact with the first barrier layer and the second surface of the well layer is in direct contact with the second barrier layer.