Patent ID: 7920612
Filing Date: 2011-04-05
Classification: B82Y,H01L,H01S

Abstract:
1. A light emitting semiconductor device comprising a III-V semiconductor material and having improved electrical confinement in the active region, comprising: an active region; an electrical confining layer positioned adjacent the active region, the confining layer comprising: a spacer layer comprising aluminum; a confinement barrier positioned between the spacer layer and the active region and having a thickness that is in a range from 2 nm to 50 nm, the confinement barrier having an aluminum content greater than that of the spacer layer, thereby creating a spike in the aluminum content near the active region, wherein the electrical confining layer comprises a dopant increase in the confinement barrier, the spacer layer comprising a direct bandgap material having an aluminum content of less than 45% and wherein the confinement barrier has an aluminum content greater than 60%.