Patent ID: 8053757
Filing Date: 2011-11-08
Classification: H01L

Abstract:
1. A gallium nitride (GaN)-based semiconductor light-emitting device (LED), comprising: an n-type GaN-based semiconductor layer (n-type layer); an active layer; and a p-type GaN-based semiconductor layer (p-type layer); wherein the n-type layer is epitaxially grown by using ammonia gas (NH wherein a flow rate ratio between group V and group III elements, or a V/III ratio, during the epitaxial growth of the n-type layer is gradually reduced from an initial value to a final value; and wherein the n-type layer includes a sublayer grown after the V/III ratio is reduced to the final value, the sublayer thus having a substantially lower Ga/N ratio than the rest of the n-type layer; wherein the sublayer is in contact with the active layer, and wherein the sublayer has a thickness of less than 1000 angstroms.