Patent ID: 9691600
Date: 2017-06-27
CPC Classifications: H01J

Claim:
1. An ultraviolet light emitting device comprising: a first substrate that has a first main surface and is transparent to ultraviolet light; a second substrate that has a second main surface and a third main surface and is transparent to ultraviolet light, the second main surface facing the first main surface of the first substrate, the third main surface being opposite the second main surface; a gas in a space between the first substrate and the second substrate; electrodes directly or indirectly on the first main surface of the first substrate; a dielectric layer that is located in a first region directly or indirectly on the first main surface of the first substrate and covers the electrodes, the dielectric layer being not located in a second region directly or indirectly on the first main surface of the first substrate, the second region being different from the first region, the first region including regions in which the electrodes are located; and a light-emitting layer that is located in the second region and/or located directly or indirectly on at least one of the second and third main surfaces of the second substrate and emits the ultraviolet light in the gas due to electrical discharge between the electrodes.