US 12,364,078 B2
Light-emitting device and method for manufacturing light-emitting device
Takahide Yanai, Hamamatsu (JP); and Yoshihiro Okuyama, Hamamatsu (JP)
Assigned to HAMAMATSU PHOTONICS K.K., Hamamatsu (JP)
Appl. No. 17/615,159
Filed by HAMAMATSU PHOTONICS K.K., Hamamatsu (JP)
PCT Filed May 27, 2020, PCT No. PCT/JP2020/020979
§ 371(c)(1), (2) Date Nov. 30, 2021,
PCT Pub. No. WO2020/246345, PCT Pub. Date Dec. 10, 2020.
Claims priority of application No. 2019-104874 (JP), filed on Jun. 4, 2019.
Prior Publication US 2022/0238775 A1, Jul. 28, 2022
Int. Cl. H10H 20/857 (2025.01); H10H 20/01 (2025.01); H10H 20/814 (2025.01)
CPC H10H 20/857 (2025.01) [H10H 20/01 (2025.01); H10H 20/814 (2025.01); H10H 20/0364 (2025.01)] 14 Claims
OG exemplary drawing
 
1. A light-emitting device comprising:
a light source;
a window mounting the light source; and
a package defining a space with the window, the light source being disposed in the space, wherein
the window includes
a window base including a light exit surface, a lower surface opposing the light exit surface, and a side surface coupling the light exit surface and the lower surface, and
an electrically conductive body disposed on the lower surface of the window base,
the package includes
a base portion formed with a recess open toward the lower surface, the base portion including a placement surface disposed along an edge of the recess and opposing the lower surface, a bottom surface opposing the placement surface, and an outer side surface coupled to the bottom surface,
a wall portion including an inner wall surface coupled to the placement surface and opposing the side surface, an outer wall surface opposing the inner wall surface and coupled to the outer side surface, and an upper wall surface coupling the inner wall surface and the outer wall surface, the wall portion disposed along a perimeter of the window base and extending from the window base in a direction orthogonal to the light exit surface,
a reflection portion disposed on a surface of the recess, being configured to reflect light emitted from the light source to the window, and
an electric conductor disposed on the placement surface, the inner wall surface, the upper wall surface, the outer wall surface, and the outer side surface,
the window base is configured to transmit the light reflected on the reflection portion,
the electrically conductive body includes a plurality of first pads opposing the placement surface, and a plurality of connectors electrically connecting the light source and the plurality of first pads,
the electric conductor includes a plurality of second pads disposed on the placement surface to oppose corresponding first pads of the plurality of first pads and electrically connected to the corresponding first pads,
the lower surface of the window base and the placement surface of the base portion each include a plurality of corner portions,
each of the plurality of first pads includes a connection portion disposed on a corresponding corner portion of the plurality of corner portions of the lower surface,
each of the plurality of second pads includes an electric conductor portion disposed on a corresponding corner portion of the plurality of corner portions of the placement surface, and
the connection portion and the electric conductor portion corresponding to each other are connected to each other.