Light emitting element and method of manufacturing light emitting element

Patent metadata

Field	Value
Publication number	US-2018175257-A1
Application number	US-201715825058-A
Country	US
Kind code	A1
Filing date	Nov 28, 2017
Priority date	Dec 15, 2016
Publication date	Jun 21, 2018
Grant date	—

Abstract

A light emitting element includes a light emitting member that is formed of at least two kinds of an oxide material and has a plate shape; and a light transmitting member that collimates a light emitted from the light emitting member and has a plano-convex shape, in which a contact portion between the light transmitting member and the light emitting member is continuous.

First claim

What is claimed is:

1 . A light emitting element comprising:
a light emitting member that is formed of at least two kinds of an oxide material and has a plate shape; and a light transmitting member that collimates a light emitted from the light emitting member and has a plano-convex shape, wherein a contact portion between the light transmitting member and the light emitting member is continuous.

2 . The light emitting element of claim 1 ,
wherein the light emitting member is formed of at least one material not having a luminescent center and a material having the luminescent center, and wherein the light transmitting member is formed of a material substantially the same as the material of the light emitting member, not having the luminescent center.

3 . The light emitting element of claim 2 ,
wherein in the contact portion, the material not having the luminescent center and the material having the luminescent center are distributed in a state of being three-dimensionally entwined with each other.

4 . The light emitting element of claim 2 ,
wherein the material not having the luminescent center is Al 2 O 3 , and wherein the material having the luminescent center is Y 3 Al 5 O 12 containing Ce.

5 . A method of manufacturing a light emitting element in which a contact portion between a light transmitting member and a light emitting member is continuous, the method comprising:
heating each powder, which is to be a molten liquid of the light emitting member, of an aluminum oxide, a yttrium oxide, and a cerium oxide in a crucible; bringing a planar portion of the light transmitting member having a plano-convex shape in contact with a bottom hole of the crucible; and coagulating the molten liquid of the light emitting member by increasing a space between the crucible and the light transmitting member after checking a state that the molten liquid of the light emitting member wets the planar portion of the light transmitting member.

6 . The method of manufacturing a light emitting element of claim 5 ,
wherein in the molten liquid of the light emitting member, an Al molar fraction is 75 mol % to 85 mol %, inclusive, a Ce molar fraction is 0.02 mol % to 0.4 mol %, inclusive, and a balance is Y, and wherein in the manufactured light emitting element, a thickness of the light emitting member is set to 0.1 mm to 0.35 mm, inclusive.

7 . The light emitting element of claim 3 ,
wherein the material not having the luminescent center is Al 2 O 3 , and wherein the material having the luminescent center is Y 3 Al 5 O 12 containing Ce.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Akiyama Shinnosuke
• Toyota Kei
• Mori Masato

Classifications

• C01F17/34

  Aluminates, e.g. YAlO3 or Y3-xGdxAl5O12 · CPC title

• C01F7/02

  Aluminium oxide; Aluminium hydroxide; Aluminates · CPC title

• H01L33/56

  Electricity · mapped topic

• C01F17/0025

  Chemistry & Metallurgy · mapped topic

• H01L33/26

  Electricity · mapped topic