# US 12,119,434 B2 · Light emitting device including first reflecting layer and second reflecting layer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,119,434 B2 - Document ID: US12119434B2 - Status: Granted - Kind: B2 - Application number: 18/358,657 - Filed: 2023-07-25 - Published: 2023-11-23 - Granted: 2024-10-15 - Earliest claimed: 2018-06-29 - Assignees: Nichia Corporation - Applicants: Nichia Corporation - Inventors: Kenji Ozeki; Atsushi Kojima; Chinami Nakai - Web page: https://patentgrep.com/patent/US12119434B2 ## CPC - H10H 20/852: Encapsulations - H10H 20/856: Reflecting means - H10H 20/8506: {Containers} - H10H 20/8515: {not being in contact with the bodies} - 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 20/0361: {of wavelength conversion means} - H10H 20/0362: {of encapsulations} - H10H 20/0363: {of optical field-shaping means} - H10H 20/0364: {of interconnections} - H10H 20/851: Wavelength conversion means - H10H 20/882: {Scattering means (H10H20/82 takes precedence)} - H10W 72/07351: {characterised by changes in properties of the die-attach connectors during connecting} - H10W 72/30: Die-attach connectors - H10W 72/884: {Die-attach connectors and bond wires} - H10W 90/724: {between a chip and a stacked insulating package substrate, interposer or RDL} - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A light emitting device includes: a package having an upper surface defining a recess; a light emitting element and a protection device respectively disposed on a bottom surface of the recess; a first reflecting layer covering a lateral surface of the recess; and a second reflecting layer covering the bottom surface of the recess. The first reflecting layer is apart from the light emitting element and covers the protection device. The second reflecting layer contacts with a lower portion of a lateral surface of the light emitting element. An upper surface of the light emitting element and an upper portion of the lateral surface of the light emitting element are exposed from the second reflecting layer. ## Claims ### Claim 1 A light emitting device comprising: a package in which a recess is defined; a light emitting element and a protection device respectively disposed on a bottom surface defining the recess; a first reflecting layer covering a lateral surface defining the recess; and a second reflecting layer covering the bottom surface defining the recess, wherein: the first reflecting layer is apart from the light emitting element and covers the protection device, the second reflecting layer contacts a lower portion of a lateral surface of the light emitting element, and an upper surface of the light emitting element and an upper portion of the lateral surface of the light emitting element are exposed from the second reflecting layer. ### Claim 2 (depends on 1) The light emitting device according to claim 1, wherein: the second reflecting layer contacts the first reflecting member. ### Claim 3 (depends on 1) The light emitting device according to claim 1, wherein: the package comprises a wiring portion on the bottom surface defining the recess, and the light emitting element is connected to the wiring portion with a wire. ### Claim 4 (depends on 3) The light emitting device according to claim 3, wherein: the first reflecting layer covers a connecting portion between the wire and the wiring portion. ### Claim 5 (depends on 1) The light emitting device according to claim 1, wherein: the package comprises a first lead on which the light emitting element is disposed and a second lead on which the protection device is disposed, the first lead and the second lead are apart from each other and disposed on the bottom surface defining the recess, and the light emitting element is connected to the second lead with the wire. ### Claim 6 (depends on 5) The light emitting device according to claim 5, wherein: the first reflecting layer covers a connecting portion between the wire and the first lead. ### Claim 7 (depends on 1) The light emitting device according to claim 1, wherein: the first reflecting layer comprises a first resin in which a first reflecting material is dispersed. ### Claim 8 (depends on 1) The light emitting device according to claim 1, wherein: the second reflecting layer comprises a second resin in which a second reflecting material is dispersed. ### Claim 9 (depends on 1) The light emitting device according to claim 1, wherein: the second reflecting layer comprises: a reflective-material-containing layer including a second reflecting material settled toward the bottom surface defining the recess in the second resin, and a light-transmissive layer disposed on the reflective-material-containing layer. ### Claim 10 (depends on 9) The light emitting device according to claim 9, wherein: the second reflecting material contains titanium oxide. ### Claim 11 (depends on 1) The light emitting device according to claim 1, further comprising: a third resin covering the first reflecting layer, the second reflecting layer, and the light emitting element. ### Claim 12 (depends on 11) The light emitting device according to claim 11, wherein: the third resin comprises phosphor particles. ### Claim 13 (depends on 12) The light emitting device according to claim 12, wherein: the phosphor particles are settled toward the bottom surface defining the recess. ### Claim 14 (depends on 1) The light emitting device according to claim 1, wherein: a thickness of the second reflecting layer covering the bottom of the recess is in a range of 10 μm to 200 μm. ### Claim 15 (depends on 1) The light emitting device according to claim 1, wherein: a distance between the light emitting element and the first reflecting layer in a plan view is in a range of 100 μm to 1500 μm. ### Claim 16 (depends on 1) The light emitting device according to claim 1, wherein: the first reflecting layer comprises a curved portion spaced from the light-emitting element in a plan view. ### Claim 17 (depends on 1) The light emitting device according to claim 1, wherein: a maximum height of the second reflecting layer from the bottom surface defining the recess is less than a maximum height of the light emitting element from the bottom surface defining the recess. ### Claim 18 (depends on 1) The light emitting device according to claim 1, wherein: an upper surface of second reflecting layer is planar.