Patent ID: 8629457
Filing Date: 2014-01-14
Classification: H01L

Abstract:
1. A light-emitting device, comprising: a semiconductor layer including a first portion formed of a group III nitride semiconductor having a first conductive type and a second portion formed of a group III nitride semiconductor having a second conductive type, said first and second portions forming a junction for light emission originating from recombination of electrons and holes; and a silicon carbide substrate for supporting said semiconductor layer, electrically connected to a side of said semiconductor layer including said first portion, said silicon carbide substrate including a first layer facing said semiconductor layer and a second layer stacked on said first layer, said first and second layers having first and second dislocation densities, respectively, and said second dislocation density is higher than said first dislocation density, wherein said first and second layers have first and second impurity concentrations, respectively, and said second impurity concentration is higher than said first impurity concentration.