# US 12,224,386 B2 · Ultraviolet light emitting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,386 B2 - Document ID: US12224386B2 - Status: Granted - Kind: B2 - Application number: 17/573,915 - Filed: 2022-01-12 - Published: 2022-07-21 - Granted: 2025-02-11 - Earliest claimed: 2021-01-15 - Assignees: Toyoda Gosei Co., Ltd. - Applicants: Toyoda Gosei Co., Ltd. - Inventors: Takeshi Matsushima; Shota Shimonishi; Kenichi Matsuura; Aya Kawaoka; Takashi Shugo; Shintaro Hakamata; Yuki Goto - Web page: https://patentgrep.com/patent/US12224386B2 ## CPC - H10H 20/854: characterised by their material, e.g. epoxy or silicone resins - H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls - H10H 20/8506: {Containers} - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS ## Abstract An ultraviolet light emitting device includes a substrate, an ultraviolet light emitting element, a bonding layer, a fluororesin film, and a fluorocarbon compound. The substrate includes a mounting surface. The ultraviolet light emitting element includes a first surface, a second 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. 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. ## Claims ### Claim 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. ### Claim 2 (depends on 1) The ultraviolet light emitting device according to claim 1, wherein: the fluorocarbon compound includes a side surface portion facing the side surface of the ultraviolet light emitting element; the fluororesin film includes a side wall surface on a substrate side; and the side wall surface of the fluororesin film faces the side surface of the ultraviolet light emitting element in a state where the side surface portion of the fluorocarbon compound is sandwiched therebetween. ### Claim 3 (depends on 2) The ultraviolet light emitting device according to claim 2, wherein a thickness of the side surface portion of the fluorocarbon compound is smaller as a distance from the mounting surface of the substrate increases. ### Claim 4 (depends on 1) The ultraviolet light emitting device according to claim 1, wherein: the fluorocarbon compound includes an upper surface portion facing the second surface of the ultraviolet light emitting element; the fluororesin film includes a ceiling surface on the substrate side; and the ceiling surface of the fluororesin film faces the second surface of the ultraviolet light emitting element in a state where the upper surface portion of the fluorocarbon compound is sandwiched therebetween. ### Claim 5 (depends on 1) The ultraviolet light emitting device according to claim 1, wherein: the fluororesin film includes a ceiling surface on the substrate side; and the ceiling surface of the fluororesin film is in contact with the second surface of the ultraviolet light emitting element. ### Claim 6 (depends on 1) The ultraviolet light emitting device according to claim 1, wherein the fluorocarbon compound fills a gap between the mounting surface of the substrate and the first surface of the ultraviolet light emitting element. ### Claim 7 (depends on 1) The ultraviolet light emitting device according to claim 1, wherein the fluorocarbon compound does not fill a gap between the mounting surface of the substrate and the first surface of the ultraviolet light emitting element. ### Claim 8 (depends on 1) The ultraviolet light emitting device according to claim 1, wherein: the fluorocarbon compound contains a filler configured to transmit ultraviolet light; and the filler has a refractive index of 1.2 or more and 1.6 or less. ### Claim 9 (depends on 1) The ultraviolet light emitting device according to claim 1, further comprising: an adhesive layer, wherein the adhesive layer adheres the mounting surface of the substrate and the fluororesin film, and is not present between the second surface of the ultraviolet light emitting element and the fluororesin film. ### Claim 10 (depends on 1) The ultraviolet light emitting device according to claim 1, wherein a refractive index of the fluorocarbon compound is greater than the refractive index of an atmosphere and equal to or less than the refractive index of the ultraviolet light emitting element, wherein the ultraviolet light emitting element, the second surface and the side surface from which the light is extracted to the outside are not in contact with the air layer having a lower refractive index. ### Claim 11 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 is in at least partial contact with 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 filled with gas comprising a closed space is disposed between the substrate and the ultraviolet light emitting element. ### Claim 12 (depends on 11) The ultraviolet light emitting device according to claim 11, wherein: the fluorocarbon compound includes a side surface portion facing the side surface of the ultraviolet light emitting element; the fluororesin film includes a side wall surface on a substrate side; and the side wall surface of the fluororesin film faces the side surface of the ultraviolet light emitting element in a state where the side surface portion of the fluorocarbon compound is sandwiched therebetween. ### Claim 13 (depends on 12) The ultraviolet light emitting device according to claim 12, wherein a thickness of the side surface portion of the fluorocarbon compound is smaller as a distance from the mounting surface of the substrate increases. ### Claim 14 (depends on 11) The ultraviolet light emitting device according to claim 11, wherein: the fluorocarbon compound includes an upper surface portion facing the second surface of the ultraviolet light emitting element; the fluororesin film includes a ceiling surface on the substrate side; and the ceiling surface of the fluororesin film faces the second surface of the ultraviolet light emitting element in a state where the upper surface portion of the fluorocarbon compound is sandwiched therebetween. ### Claim 15 (depends on 11) The ultraviolet light emitting device according to claim 11, wherein: the fluororesin film includes a ceiling surface on the substrate side; and the ceiling surface of the fluororesin film is in contact with the second surface of the ultraviolet light emitting element. ### Claim 16 (depends on 11) The ultraviolet light emitting device according to claim 11, wherein the fluorocarbon compound fills a gap between the mounting surface of the substrate and the first surface of the ultraviolet light emitting element. ### Claim 17 (depends on 11) The ultraviolet light emitting device according to claim 11, wherein the fluorocarbon compound does not fill a gap between the mounting surface of the substrate and the first surface of the ultraviolet light emitting element. ### Claim 18 (depends on 11) The ultraviolet light emitting device according to claim 11, wherein: the fluorocarbon compound contains a filler configured to transmit ultraviolet light; and the filler has a refractive index of 1.2 or more and 1.6 or less. ### Claim 19 (depends on 11) The ultraviolet light emitting device according to claim 11, further comprising: an adhesive layer, wherein the adhesive layer adheres the mounting surface of the substrate and the fluororesin film, and is not present between the second surface of the ultraviolet light emitting element and the fluororesin film. ### Claim 20 (depends on 11) The ultraviolet light emitting device according to claim 11, wherein a refractive index of the fluorocarbon compound is greater than the refractive index of an atmosphere and equal to or less than the refractive index of the ultraviolet light emitting element, wherein the ultraviolet light emitting element, the second surface and the side surface from which the light is extracted to the outside are not in contact with the air layer having a lower refractive index.