US 11,751,298 B2
Light-emitting device
Norihiro Sugimoto, Komatsushima (JP); and Shinsuke Sannabe, Itano-gun (JP)
Assigned to NICHIA CORPORATION, Anan (JP)
Filed by NICHIA CORPORATION, Anan (JP)
Filed on Dec. 22, 2022, as Appl. No. 18/145,288.
Claims priority of application No. 2022-001406 (JP), filed on Jan. 7, 2022; and application No. 2022-008446 (JP), filed on Jan. 24, 2022.
Prior Publication US 2023/0225022 A1, Jul. 13, 2023
Int. Cl. H05B 33/02 (2006.01); H05B 33/12 (2006.01)
CPC H05B 33/02 (2013.01) [H05B 33/12 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A light-emitting device comprising:
a substrate comprising a lateral wall portion and a bottom portion surrounded by the lateral wall portion;
a light-emitting element disposed on the bottom portion;
a light-transmissive member disposed on or above the substrate to cover the bottom portion; and
a bonding member disposed between an upper surface of the lateral wall portion and a lower surface of the light-transmissive member to bond the lateral wall portion and the light-transmissive member together, wherein:
in a top view, the light-emitting device includes:
a first side extending in a first direction,
a second side extending in the first direction and being parallel to the first side,
a third side extending in a second direction orthogonal to the first direction,
a fourth side extending in the second direction and being parallel to the third side,
a first region located in a corner formed by the first side and the third side, and
a second region located in a corner formed by the second side and the third side,
the light-transmissive member comprises a projection covering the bottom portion of the substrate and an outer peripheral portion surrounding the projection in the top view,
the upper surface of the lateral wall portion includes a first upper surface portion exposed from the light-transmissive member in the first region, a second upper surface portion exposed from the light-transmissive member in the second region, and a third upper surface portion located between the first upper surface portion and the second upper surface portion in the second direction,
an upper surface of the outer peripheral portion includes a first outer peripheral surface portion located in the first region,
a lower surface of the outer peripheral portion includes a second outer peripheral surface portion opposite to the first outer peripheral surface portion,
an area of the first upper surface portion of the lateral wall portion is greater than an area of the first outer peripheral surface portion of the outer peripheral portion,
the lower surface of the light-transmissive member includes a first lower surface portion facing the third upper surface portion,
an area in which the first lower surface portion faces the third upper surface portion is greater than an area in which the second outer peripheral surface portion faces the upper surface of the lateral wall portion, and
the bonding member is disposed between the third upper surface portion and the first lower surface portion.