Light-emitting device

A light-emitting device comprising:

• at least one LED chip;
• a mounting substrate on which the at least one LED chip is mounted;
• and
• a cover part which covers the at least one LED chip and allows light emitted from the at least one LED chip to pass through the cover part,
• the mounting substrate including;
• a ceramic substrate;
• a reflection layer which is situated on a second surface on the opposite side of the ceramic substrate from a first surface and is made of metal material to reflect light emitted from the at least one LED chip;
• and
• a gas barrier layer which covers the reflection layer,
• the at least one LED chip being bonded to the first surface of the ceramic substrate with a bonding part in between,
• the bonding part allowing light emitted from the at least one LED chip to pass through the bonding part,
• the ceramic substrate having light diffusion and transmissive properties and having a plan size larger than a plan size of the at least one LED chip, and
• the reflection layer having a plan size smaller than a plan size of the ceramic substrate and being formed so as to cover an area larger than a projected area of the at least one LED chip on the second surface of the ceramic substrate.