US 12,278,316 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. 11, 2022, as Appl. No. 17/573,142.
Claims priority of application No. 2021-003828 (JP), filed on Jan. 13, 2021.
Prior Publication US 2022/0223767 A1, Jul. 14, 2022
Int. Cl. H01L 33/56 (2010.01); H01L 33/32 (2010.01); H01L 33/38 (2010.01); H01L 33/48 (2010.01); H01L 33/58 (2010.01); H01L 33/62 (2010.01)
CPC H01L 33/56 (2013.01) [H01L 33/382 (2013.01); H01L 33/486 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An ultraviolet light emitting device, comprising:
a substrate;
an ultraviolet light emitting element;
a bonding layer;
a light transmitting member;
an adhesive layer; and
a fluorocarbon compound,
wherein:
the substrate has a mounting surface mounting the ultraviolet light emitting element;
the ultraviolet light emitting element has 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 light transmitting member is configured to transmit ultraviolet light;
the adhesive layer adheres the substrate directly to the light transmitting member;
the substrate and the light transmitting member 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;
the fluorocarbon compound fills a gap between the second surface of the ultraviolet light emitting element and the light transmitting member in a state of being in contact with the second surface and the light transmitting member;
the fluorocarbon compound is in contact with the side surface of the ultraviolet light emitting element;
the fluorocarbon compound is not in contact with the adhesive layer; and
a surface of the light transmitting member and the second surface of the ultraviolet light emitting element are coplanar.