Light emitting element

Patent metadata

Field	Value
Publication number	US-10593840-B2
Application number	US-201916351206-A
Country	US
Kind code	B2
Filing date	Mar 12, 2019
Priority date	Dec 9, 2013
Publication date	Mar 17, 2020
Grant date	Mar 17, 2020

Abstract

A light emitting element has first and second electrodes. In plan view, the first electrode has a first connecting portion configured to be bonded with a conductive wire, a first extending portion, and two second extending portions. The second electrode has a second connecting portion configured to be bonded with a conductive wire, and two third extending portions. The first extending portion extends linearly toward the second connecting portion, and the two second extending portions are arranged on two sides of the first extending portion. The second extending portions each has two bent portions and a linear portion extending parallel to the first extending portion and disposed between the two bent portions. The third extending portions extend parallel to the first extending portion between the first extending portion and the second extending portions. Each of the second extending portions extends beyond a position of the second connecting portion.

First claim

What is claimed is:

1. A light emitting element comprising:
a semiconductor stack including a first conductivity type semiconductor layer and a second conductivity type semiconductor layer;
a first electrode formed on the first conductivity type semiconductor layer; and
a second electrode formed on the second conductivity type semiconductor layer,
the first electrode and the second electrode being disposed on the same face side of the first conductivity type semiconductor layer and the second conductivity type semiconductor layer,
in plan view,
the first electrode having a first connecting portion, a first extending portion, and two second extending portions, the first connecting portion being configured to be bonded with a conductive wire,
the second electrode having a second connecting portion and two third extending portions, the second connecting portion being configured to be bonded with a conductive wire,
at least one of the first connecting portion and the second connecting portion having a circular shape,
the first extending portion extending linearly from the first connecting portion toward the second connecting portion, and the two second extending portions being arranged on two sides of the first extending portion, with each of the second extending portions having two bent portions and a linear portion extending parallel to the first extending portion and disposed between the two bent portions,
the two third extending portions extending parallel to the first extending portion between the first extending portion and the two second extending portions, and
with respect to an extending direction of the first extending portion, each of the second extending portions extending beyond a position of the second connecting portion, and
the first connecting portion and the second connecting portion being symmetrically arranged with respect to an imaginary line extending parallel to one side of the light emitting element.

2. The light emitting element according to claim 1 , wherein
distances between the first extending portion and the respective second extending portions are the same, and
the distances between the first extending portion and the respective third extending portions are the same.

3. The light emitting element according to claim 2 , wherein
the two third extending portions extend to form a U shape.

4. The light emitting element according to claim 2 , wherein
each of distal ends of the second extending portions including a portion parallel to a first portion of a corresponding one of the third extending portions on the outside of the corresponding one of the third extending portions, and extending closer to the second connecting portion than an imaginary line that extends along a second portion of the corresponding one of the third extending portions, with the second portion extending parallel to the first extending portion.

5. The light emitting element according to claim 1 , wherein
the two third extending portions extend to form a U shape.

6. The light emitting element according to claim 5 , wherein
the first conductivity type semiconductor layer is disposed over the second conductivity type semiconductor layer, the first conductivity type semiconductor layer is a p-type semiconductor layer,
the first electrode and the second electrode are entirely surrounded by the p-type semiconductor layer of the semiconductor stack.

7. The light emitting element according to claim 5 , wherein
each of distal ends of the second extending portions including a portion parallel to a first portion of a corresponding one of the third extending portions on the outside of the corresponding one of the third extending portions, and extending closer to the second connecting portion than an imaginary line that extends along a second portion of the corresponding one of the third extending portions, with the second portion extending parallel to the first extending portion.

8. The light emitting element according to claim 7 , wherein
each of the third extending portions includes a portion parallel to the first extending portion disposed between the first extending portion and a corresponding one of the second extending portions, and a distal end that is bent toward the first connecting portion from the portion parallel to the first extending portion.

9. The light emitting element according to claim 5 , wherein
each of the third extending portions includes a portion parallel to the first extending portion disposed between the first extending portion and a corresponding one of the second extending portions, and a distal end that is bent toward the first connecting portion from the portion parallel to the first extending portion.

10. The light emitting element according to claim 1 , wherein
the first conductivity type semiconductor layer and the second conductivity type semiconductor layer constitute a semiconductor stack,
in plan view,
the semiconductor stack is rectangular, and
the first extending portion is parallel to one side of the semiconductor stack.

11. The light emitting element according to claim 1 , wherein
the second extending portions extend from the first connecting portion, and the third extending portions extend from the second connecting portion.

12. The light emitting element according to claim 1 , wherein
the first conductivity type semiconductor layer is disposed over the second conductivity type semiconductor layer, the first conductivity type semiconductor layer is a p-type semiconductor layer,
the first electrode and the second electrode are entirely surrounded by the p-type semiconductor layer of the semiconductor stack.

13. The light emitting element according to claim 1 , wherein
each of distal ends of the second extending portions including a portion parallel to a first portion of a corresponding one of the third extending portions on the outside of the corresponding one of the third extending portions, and extending closer to the second connecting portion than an imaginary line that extends along a second portion of the corresponding one of the third extending portions, with the second portion extending parallel to the first extending portion.

14. The light emitting element according to claim 13 , wherein
each of the third extending portions includes a portion parallel to the first extending portion disposed between the first extending portion and a corresponding one of the second extending portions, and a distal end that is bent toward the first connecting portion from the portion parallel to the first extending portion.

15. The light emitting element according to claim 1 , wherein
each of the third extending portions includes a portion parallel to the first extending portion disposed between the first extending portion and a corresponding one of the second extending portions, and a distal end that is bent toward the first connecting portion from the portion parallel to the first extending portion.

16. The light emitting element according to claim 1 , wherein
with respect to an extending direction of the first extending portion, at least a portion of one of the bent portions of each of the second extending portions extends beyond the second connecting portion.

17. The light emitting element according to claim 1 , wherein
the first extending portion only includes a linear piece in plan view.

18. The light emitting element according to claim 1 , wherein
the first extending portion does not split into separate pieces in plan view.

19. The light emitting element accordin

Assignees

• Nichia Corp

Inventors

• Sato Kosuke
• Emura Keiji

Classifications

• H01L33/38

  Electricity · mapped topic

• H01L33/387 Primary

  Electricity · mapped topic

• H01L33/06

  Electricity · mapped topic

• Y02E10/544

  Solar cells from Group III-V materials · CPC title

• H10H20/83 Primary

  Electrodes · CPC title