Light-emitting device

A light-emitting device, comprising:

• a substrate, comprising a top surface and a sidewall;
• a semiconductor stack formed on the top surface of the substrate, the semiconductor stack comprising a first semiconductor layer, an active layer and a second semiconductor layer;
• a dicing street surrounding the semiconductor stack and exposing the top surface of the substrate;
• and
• an insulating reflective structure covering the semiconductor stack,
• wherein the insulating reflective structure comprises a protective layer covering the semiconductor stack and the dicing street, a reflective layer comprising a Distributed Bragg Reflector structure formed on the protective layer, and a cap layer covering the reflective layer, and
• wherein the reflective layer comprises an uneven portion adjacent to the sidewall of the substrate, and the uneven portion comprises an uneven thickness.