Patent ID: 7800126
Filing Date: 2010-09-21
Classification: H01L

Abstract:
1. A III-V group compound semiconductor light emitting device including a III-V group compound semiconductor, comprising: a first stacked body and a second stacked body, said first stacked body including a III-V group compound semiconductor stacked body of an n-type semiconductor layer, an active layer and a p-type semiconductor layer stacked in order, and a reflection layer, a first diffusion suppressing layer and a first metal layer formed on one main surface of said III-V group compound semiconductor stacked body, said first diffusion suppressing layer being a Ni—Ti alloy with a thickness between 0.01 to 1.0 μm, said second stacked body including a semiconductor substrate, an ohmic contact metal layer, a second diffusion suppressing layer, and a second metal layer, wherein said first and second stacked bodies are joined by said first metal layer and said second metal layer, said first diffusion suppressing layer is in contact with said first metal layer and suppresses diffusion of atoms between said reflection layer and said first metal layer, said first metal layer consists essentially of one or more metals selected from the group consisting of Au, Sn, Pd, In, Ge, Bi, Zn, and Pb, and said reflection layer contains an alloy having a metal of high reflectance along with at least one of a noble metal for suppressing oxidation or migration and a rare earth element, said metal of high reflectance selected from the group consisting of Ag, Al, Rh and Pd, and said noble metal for suppressing oxidation or migration selected from the group consisting of Au, Pt, Pd, Rh, Cu, and Bi.