公开(公告)号：US20240250210A1

公开(公告)日：2024-07-25

申请号：US18416277

申请日：2024-01-18

Applicant: EPISTAR CORPORATION

Inventor： Chia-Che LIAO ,  Chih-Hao CHEN ,  Wei-Che WU ,  Sheng-Hao WU ,  Siou-Huei YANG

IPC: H01L33/16 ,  H01L33/10

CPC classification number: H01L33/16 ,  H01L33/10

Abstract: A light-emitting device includes a substrate comprising an upper surface, a plurality of side surfaces, and a semiconductor stack located on the upper surface. The substrate includes a hexagonal crystal structure. The plurality of side surfaces includes a first side surface. The first side surface is tilted away from a m-plane of the hexagonal crystal structure, and an acute angle is formed between the first side surface and the m-plane. The first side surface includes a first modified stripe, and the first modified stripe includes a plurality of first modified regions. A pitch is between the adjacent first modified regions, and the pitch is not less than 5 μm. The first side surface comprises a folded structure.