Patent ID: 7884381
Filing Date: 2011-02-08
Classification: H01L

Abstract:
1. A light emitting device, comprising: a semiconductor multilayer structure having a first semiconductor layer of a first conductivity type, a second semiconductor layer of a second conductivity type different from the first conductivity type, and an active layer sandwiched between the first semiconductor layer and the second semiconductor layer; a reflecting layer provided on one surface of the semiconductor multilayer structure, the reflecting layer reflecting a light emitted from the active layer; a supporting substrate provided on one surface of the reflecting layer opposite to a surface facing the semiconductor multilayer structure, the supporting substrate supporting the semiconductor multilayer structure via a metal bonding layer, the supporting substrate consisting of Si or Ge; a back surface electrode provided on one surface of the supporting substrate opposite to a surface facing the metal bonding layer, the back surface electrode comprising Au alloyed with the supporting substrate, a hardness of the back surface electrode being higher than a hardness of the Au; and Ti aggregates provided on the one surface of the supporting substrate opposite to a surface facing the metal bonding layer, the Ti aggregates comprising aggregated Ti particles.