US 12,224,386 B2
Ultraviolet light emitting device
Takeshi Matsushima, Kiyosu (JP); Shota Shimonishi, Kiyosu (JP); Kenichi Matsuura, Kiyosu (JP); Aya Kawaoka, Kiyosu (JP); Takashi Shugo, Kiyosu (JP); Shintaro Hakamata, Kiyosu (JP); and Yuki Goto, Kiyosu (JP)
Assigned to TOYODA GOSEI CO., LTD., Kiyosu (JP)
Filed by TOYODA GOSEI CO., LTD., Kiyosu (JP)
Filed on Jan. 12, 2022, as Appl. No. 17/573,915.
Claims priority of application No. 2021-004905 (JP), filed on Jan. 15, 2021.
Prior Publication US 2022/0231205 A1, Jul. 21, 2022
Int. Cl. H01L 33/56 (2010.01); H01L 33/62 (2010.01)
CPC H01L 33/56 (2013.01) [H01L 33/62 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An ultraviolet light emitting device comprising:
a substrate;
an ultraviolet light emitting element;
a bonding layer;
a fluororesin film; and
a fluorocarbon compound, wherein:
the substrate includes a mounting surface mounting the ultraviolet light emitting element;
the ultraviolet light emitting element includes a first surface having an electrode, a second surface opposite to the first surface, and a side surface;
the bonding layer bonds the electrode on the first surface of the ultraviolet light emitting element and a part of the mounting surface of the substrate;
the fluororesin film is a flexible material configured to transmit ultraviolet light;
the substrate and the fluororesin film are disposed in a state where the ultraviolet light emitting element is sandwiched therebetween;
the fluorocarbon compound is a liquid at normal temperature and pressure; and
the fluorocarbon compound fills a gap between the side surface of the ultraviolet light emitting element and the fluororesin film in a state of being in contact with the side surface and the fluororesin film,
wherein an air layer comprising a closed space is disposed between the substrate and the ultraviolet light emitting element.