Patent ID: 6121638
Filing Date: 2000-09-19
Classification: B82Y,H01L,H01S

Abstract:
A multilayered nitride-based semiconductor device comprising:an InGaN active layer;at least an upper cladding layer and lower cladding layer on said active layer;at least an upper contact layer and a lower contact layer on said respective upper and lower cladding layers; andan upper metal electrode and a lower metal electrode,wherein;the lower contact layer comprises a first compound semiconductor layer made of n-type In.sub.x Ga.sub.1-x N (x is an In content);the lower cladding layer comprises a second compound semiconductor layer made of n-type Ga.sub.y Al.sub.1-y N (y is a Ga content);a first intermediate layer of n-type GaN is formed in contact with the first compound semiconductor layer;a second intermediate layer made of at least one n-type Ga.sub.z Al.sub.1-z N (z is a Ga content) layer is formed between the first intermediate layer and the second compound semiconductor layer;said second intermediate layer is formed in contact with the first intermediate layer and the second compound semiconductor layer;said lower metal electrode is formed in contact with the first compound semiconductor layer; andsaid In content x satisfies 0.05.ltoreq.x, and said Ga contents y and z satisfy 1.gtoreq.z.gtoreq.y.