Patent ID: 8044414

Claim:
A method of forming a semiconductor layered structure by epitaxial growth, comprising the steps of: (a) forming an n-type conductive layer of a second group III nitride doped with a predetermined n-type dopant, on an underlying substrate, said second group III nitride being Al x Ga 1-x N (0<x≦1), which is obtained by forming an underlying layer of a first group III nitride on a predetermined base material, said first group III nitride being AlN; and (b) forming a functional layer with a quantum dot structure on said n-type conductive layer by repetition of the steps of: (b-1) forming a plurality of quantum dots of a third group III nitride, said third group III nitride being Ga y In 1-y N (0<y≦1), by self-organization; and (b-2) forming a matrix layer of a fourth group III nitride, said fourth group III nitride being Al z Ga 1-z N (0<z≦1), said step (a) and said step (b) being sequentially performed by MBE, said n-type conductive layer and said matrix layer forming a matrix region, each layer forming said matrix region being formed while maintaining compression stress in a direction generally perpendicular to a direction of deposition, said compression stress acting on an interface between said underlying layer and said matrix region, said step (b-1) being performed in the presence of said compression stress.