Light emitting device

Patent metadata

Field	Value
Publication number	US-9893242-B2
Application number	US-201615277662-A
Country	US
Kind code	B2
Filing date	Sep 27, 2016
Priority date	Sep 30, 2015
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

A light emitting device is provided that can restrain deterioration of a mount substrate made of resin, the light emitting device including: a support member that is made of resin; a pair of wirings that are arranged on the support member; a light emitting element that is arranged to cross the pair of wirings and that has a pair of electrodes on one side running in parallel to the pair of wirings so as to be electrically connected; and a vaporproof member in a film shape that seamlessly covers an upper face of the support member, at least, in a region where the light emitting element is arranged between the pair of wirings in a plan view, wherein the vaporproof member has a higher vaporproof property than that of the support member.

First claim

What is claimed is:

1. A light emitting device comprising:
a support member that is made of resin;
a pair of wirings that are arranged on the support member;
a light emitting element that is arranged to cross the pair of wirings and that has a pair of electrodes on one side running in parallel to the pair of wirings so as to be electrically connected; and
a vaporproof member in a film shape that seamlessly covers an upper face of the support member, at least, in a region where the light emitting element is arranged between the pair of wirings in a plan view,
wherein the vaporproof member has a higher vaporproof property than that of the support member,
wherein the vaporproof member has a moisture vapor permeability rate of 20.0 g/(m 2 ·day) or less, where g represents grams and m represents meters, and
wherein the vaporproof member is not in contact with the light emitting element.

2. The light emitting device according to claim 1 , wherein the support member is in a sheet shape and is flexible.

3. The light emitting device according to claim 2 , wherein the support member has an even thickness.

4. The light emitting device according to claim 3 , wherein the support member is flat from a region under the pair of wirings through another region between the pair of wirings.

5. The light emitting device according to claim 1 , wherein the vaporproof member is in a sheet shape that covers an entire upper face of the support member, and wherein the pair of wirings are arranged on the vaporproof member.

6. The light emitting device according to claim 1 , wherein the vaporproof member is arranged, in a plan view, in the region where the light emitting element is arranged and a peripheral region thereof.

7. The light emitting device according to claim 6 , wherein the peripheral region is a region where a distance from the light emitting element in a plan view is within 2 millimeters (mm).

8. The light emitting device according to claim 1 , further comprising a first light reflective member that covers an upper face of the vaporproof member.

9. The light emitting device according to claim 8 , wherein the first light reflective member reflects 80% or more of light from the light emitting element.

10. The light emitting device according to claim 1 , further comprising a second light reflective member that covers the support member between the support member and the vaporproof member.

11. The light emitting device according to claim 10 , wherein the second light reflective member is formed of a material comprising at least one selected from titanium oxide, aluminum oxide, zinc oxide, barium carbonate, or barium sulfate in light transmissive resin.

12. The light emitting device according to claim 10 , wherein the second light reflective member reflects 80% or more of light from the light emitting element.

13. The light emitting device according to claim 1 , further comprising a light transmissive member that covers the light emitting element, wherein the vaporproof member is transmissive to light and covers an entire outer face of the light transmissive member.

14. The light emitting device according to claim 13 , further comprising a second light reflective member that covers the support member between the support member and the light emitting element.

15. The light emitting device according to claim 13 , wherein the light transmissive member comprises a wavelength conversion substance.

16. The light emitting device according to claim 13 , wherein the light transmissive member comprises a lens.

17. The light emitting device according to claim 1 , further comprising an underfill that is disposed between the vaporproof member and the light emitting element.

18. A light emitting device comprising:
a support member being insulative and flexible in a sheet shape;
a pair of wirings arranged on the support member; and
a light emitting element that is arranged to cross the pair of wirings and that has a pair of electrodes on one side running in parallel to the pair of wirings so as to be electrically connected,
wherein the support member has a moisture vapor permeability rate of 20.0 g/(m 2 ·day) or less, where g represents grams and m represents meters.

19. The light emitting device according to claim 18 , further comprising a light reflective member that covers an upper face of the support member, at least, in a region where the light emitting element is arranged between the pair of wirings in a plan view.

20. The light emitting device according to claim 19 , wherein the light reflective member reflects 80% or more of light from the light emitting element.

21. A light emitting device comprising:
a support member that is made of resin;
a pair of wirings that are arranged on the support member;
a light emitting element that is arranged to cross the pair of wirings and that has a pair of electrodes on one side running in parallel to the pair of wirings so as to be electrically connected; and
a vaporproof member in a film shape that seamlessly covers an upper face of the support member, at least, in a region where the light emitting element is arranged between the pair of wirings in a plan view,
wherein the vaporproof member has a higher vaporproof property than that of the support member,
wherein the vaporproof member has a thickness less than or equal to that of the pair of wirings, and
wherein the vaporproof member is not in contact with the light emitting element.

22. The light emitting device according to claim 21 , wherein the pair of wirings has a thickness less than or equal to 50 micrometers (μm), and
wherein the vaporproof member has a thickness less than or equal to 50 μm.

Assignees

• Nichia Corp

Inventors

• Ikeda Tomohiro
• Katsumata Masaaki
• Inayoshi Yohei
• Fukui Kazuhito

Classifications

• H10W90/724

  between a chip and a stacked insulating package substrate, interposer or RDL · CPC title

• H01L2224/16225

  Electricity · mapped topic

• H01L33/507

  Electricity · mapped topic

• H01L33/60

  Electricity · mapped topic

• H01L33/58

  Electricity · mapped topic