Light-emitting device

Patent metadata

Field	Value
Publication number	US-12520635-B2
Application number	US-202318295589-A
Country	US
Kind code	B2
Filing date	Apr 4, 2023
Priority date	Apr 28, 2017
Publication date	Jan 6, 2026
Grant date	Jan 6, 2026

Abstract

A light-emitting device includes a substrate comprising a base member, a first wiring, a second wiring, and a via hole; at least one light-emitting element electrically connected to and disposed on the first wiring; and a covering member having light reflectivity and covering a lateral surface of the light-emitting element and a front surface of the substrate. The base member defines a plurality of depressed portions separated from the via hole in a front view and opening on a back surface and a bottom surface of the base member. The substrate includes a third wiring covering at least one of inner walls of the plurality of depressed portions and electrically connected to the second wiring. A depth of each of the plurality of depressed portions defined from the back surface toward the front surface is larger on a bottom surface side than on an upper surface side of the base member.

First claim

What is claimed is:

1 . A light-emitting device comprising:
first and second light-emitting elements aligned in a first direction; and a substrate comprising:
a front surface supporting the first and second light-emitting elements;
a back surface opposite to the front surface;
a bottom surface adjacent to the front surface and the back surface; and
a first depressed portion, wherein
each of the back surface and the bottom surface includes an opening of the first depressed portion, and at least a portion of the first depressed portion is located between the first and second light-emitting elements in the first direction.

2 . The light-emitting device according to claim 1 , wherein
the first light-emitting element has a first surface facing the front surface of the substrate and a second surface opposite to the first surface, the second light-emitting element has a third surface facing the front surface of the substrate and a fourth surface opposite to the third surface, and the light-emitting device further comprises a first light-transmissive member covering the second surface and a second light-transmissive member covering the fourth surface.

3 . The light-emitting device according to claim 2 , wherein the at least a portion of the first depressed portion is located between the first and second light-transmissive members in the first direction.

4 . The light-emitting device according to claim 2 , further comprising a covering member having light reflectivity and covering a lateral surface of each of the first and second light-emitting elements, the front surface of the substrate, and a lateral surface of each of the first and second light-transmissive members.

5 . The light-emitting device according to claim 1 , wherein a depth of the first depressed portion on the bottom surface reaches a maximum at a center of the first depressed portion.

6 . The light-emitting device according to claim 1 , wherein a maximum depth of the first depressed portion is 0.4 to 0.8 times a thickness of the substrate.

7 . The light-emitting device according to claim 1 , further comprising a covering member having light reflectivity and covering a lateral surface of each of the first and second light-emitting elements and the front surface of the substrate.

8 . The light-emitting device according to claim 1 , wherein the substrate has a second depressed portion, and each of the back surface and the bottom surface includes an opening of the second depressed portion.

Assignees

• Nichia Corp

Inventors

• Nakabayashi Takuya
• Maruyama Tomokazu
• Ishikawa Tetsuya

Classifications

• H10W90/00

  Package configurations · CPC title

• H10H20/8506 Primary

  Containers · CPC title

• H10H20/857

  Interconnections, e.g. lead-frames, bond wires or solder balls · CPC title

• H10H20/856

  Reflecting means · CPC title

• H10H20/854

  characterised by their material, e.g. epoxy or silicone resins · CPC title