公开(公告)号：US09831384B2

公开(公告)日：2017-11-28

申请号：US14261368

申请日：2014-04-24

Applicant: EPISTAR CORPORATION

Inventor： Yi-Ming Chen ,  Hao-Min Ku ,  Chih-Chiang Lu ,  Tzu-Chieh Hsu

IPC: H01L33/10 ,  H01L33/26 ,  H01L33/40 ,  H01L33/38

CPC classification number: H01L33/10 ,  H01L33/38 ,  H01L33/405

Abstract: This disclosure discloses a light-emitting device. The light-emitting device comprise a light-emitting stack having a first-type semiconductor layer, a second-type semiconductor layer, and an active formed between the first-type semiconductor layer and the second-type semiconductor layer and emitting a light; and a reflective structure formed on the first-type semiconductor layer and having a first interface and a second interface; wherein the critical angle of the light at the first interface is larger than that at the second interface; and wherein the reflective structure ohmically contacts the first-type semiconductor layer at the first interface.