Patent ID: 6215133
Filing Date: 2001-04-10
Classification: H01L,H01S

Abstract:
A semiconductor light emitting device having a double-heterostructure comprising:a first clad layer of an n-type;an active layer formed on said first clad layer; anda second clad layer of a p-type, said first and second clad layers sandwiching said active layer, a band gap energy of each of said first and second clad layers being larger than that of said active layer;wherein said band gap energy of said first clad layer is different from that of said second layer, and wherein said first clad layer comprises an n-type Al.sub.y Ga.sub.1-y N where 0<y<1, said active layer comprises In.sub.x Ga.sub.1-x N where 0<x<1, and said second clad layer comprises a p-type Al.sub.z Ga.sub.1-z N where 0<z<1 with a condition of y.noteq.z.