# US 8,772,822 B2 · 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 8,772,822 B2 - Document ID: US8772822B2 - Status: Granted - Kind: B2 - Application number: 13/723,845 - Filed: 2012-12-21 - Published: 2013-06-27 - Granted: 2014-07-08 - Earliest claimed: 2011-12-27 - Assignees: Shinko Electric Industries Co., Ltd. - Applicants: Shinko Electric Industries Co., Ltd. - Inventors: Rie Arai; Akinori Shiraishi - Web page: https://patentgrep.com/patent/US8772822B2 ## CPC - H01S 5/022: Mountings; Housings - H01S 5/02492: {CuW heat spreaders} - H01S 5/4018: {Lasers electrically in series} - H01S 5/005: {Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping (H01S5/026, H01S5/18388 take precedence)} - H01S 5/0237: by soldering - H01S 5/4043: {with vertically stacked active layers} - H01S: DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL ## Abstract A light emitting device includes: a first light emitting element mounting unit including: a first substrate; a first light emitting element on a first surface of the first substrate; and a first substrate holder which includes a first column, and a first protrusion which extends from the first column toward the first light emitting element and bonded to the first surface of the first substrate; and a second light emitting element mounting unit including: a second substrate; a second light emitting element mounted on a first surface of the second substrate; and a second substrate holder which includes: a second column, and a second protrusion which extends from the second column toward the second light emitting element and bonded to the first surface of the second substrate. The second light emitting element mounting unit is stacked on the first light emitting element mounting unit. ## Claims ### Claim 1 A light emitting device comprising: a first light emitting element mounting unit comprising: a first substrate made of a conductive material and comprising a first surface and a second surface opposite to the first surface; a first light emitting element configured to emit light and mounted on the first surface of the first substrate; and a first substrate holder which supports the first substrate and comprises: a first column which faces a side surface of the first substrate and extends in a thickness direction of the first light emitting element and the first substrate; and a first protrusion which extends from the first column toward the first light emitting element and which is bonded to the first surface of the first substrate; a second light emitting element mounting unit comprising: a second substrate made of a conductive material and comprising a first surface and a second surface opposite to the first surface; a second light emitting element configured to emit light and mounted on the first surface of the second substrate; and a second substrate holder which supports the second substrate and comprises: a second column which faces a side surface of the second substrate and extends in a thickness direction of the second light emitting element and the second substrate; and a second protrusion which extends from the second column toward the second light emitting element and which is bonded to the first surface of the second substrate, wherein the second light emitting element mounting unit is stacked on the first light emitting element mounting unit such that the second column of the second substrate holder is bonded to the first column of the first substrate holder and the first light emitting element is bonded to the second surface of the second substrate via a first bonding material. ### Claim 2 (depends on 1) The light emitting device of claim 1, wherein the first protrusion is bonded to the first surface of the first substrate via a first adhesive material, and the second protrusion is bonded to the first surface of the second substrate via a second adhesive material. ### Claim 3 (depends on 1) The light emitting device of claim 1, wherein the first and second substrate holders are formed in a U-shape when viewed from a top. ### Claim 4 (depends on 1) The light emitting device of claim 1, wherein the first light emitting element is bonded to the first surface of the first substrate via a second bonding material, and the second light emitting element is bonded to the first surface of the second substrate via a third bonding material. ### Claim 5 (depends on 1) The light emitting device of claim 1, wherein each of the first and second substrates has a protruding region that extends from each of the first and second substrate holders, when viewed from a top. ### Claim 6 (depends on 1) The light emitting device of claim 1, wherein a first lens is disposed on an optical path of light emitted from the first light emitting element, and a second lens is disposed on an optical path of light emitted from the second light emitting element, wherein a side surface of the first substrate, which is opposite to a side surface of the first substrate facing the first lens, is electrically connected to a wiring substrate via a fourth bonding material, and wherein a side surface of the second substrate, which is opposite to a side surface of the second substrate facing the second lens, is electrically connected to the wiring substrate via a fifth bonding material. ### Claim 7 (depends on 1) The light emitting device of claim 1, wherein the second column of the second substrate holder is bonded to the first column of the first substrate holder via an insulating film. ### Claim 8 (depends on 1) The light emitting device of claim 1, wherein the first light emitting element and the second light emitting element are configured to emit light at the same time, when current is supplied from the first substrate to the second light emitting element in the thickness direction. ### Claim 9 (depends on 1) The light emitting device of claim 1, wherein each of the first and second substrate holders is made of silicon, ceramic, or glass.