Patent ID: 8446082

Claim:
A light-emitting device comprising: a substrate including a metallic base and an insulating layer formed on the base, the insulating layer comprising an epoxy resin using an acid anhydride as a hardening agent or one of a polyimide resin, a polyethylene terephthalate resin, and a fluororesin; a light reflection layer formed on the insulating layer, the light reflection layer including a metallic light-reflecting surface higher in optical reflectance than the insulating layer; a plurality of light-emitting elements mounted on the light-reflecting surface; and a sealing member comprising a material having gas permeability and translucency, the sealing member being formed on the insulating layer to seal the light reflection layer and the light-emitting elements; wherein a ratio of the light-reflecting surface in an area sealed by the sealing member to the area is greater than a ratio of the insulating layer exposed in the area to the area.