Light emitting device encapsulated above electrodes

Patent metadata

Field	Value
Publication number	US-11114583-B2
Application number	US-201916705235-A
Country	US
Kind code	B2
Filing date	Dec 6, 2019
Priority date	Dec 27, 2016
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

A light emitting element includes a light emitting element having a first face on which a first electrode and a second electrode are provided. A wavelength converting material covers a whole of the light emitting element except for the first face such that a surface of the wavelength converting material and the first face constitute a substantially flat plane. A first electrically conductive material is provided on the first face and the surface of the wavelength converting material to be electrically connected to the first electrode. A second electrically conductive material is provided on the first face and the surface of the wavelength converting material to be electrically connected to the second electrode. An insulating member is disposed on the first electrically conductive material, the second electrically conductive material, and the first face between the first electrode and the second electrode.

First claim

What is claimed is:

1. A light emitting device comprising:
a light emitting element having a first face on which a first electrode and a second electrode are provided;
a wavelength converting member covering a whole of the light emitting element except for the first face such that a first surface of the wavelength converting member and the first face constitute a substantially flat plane;
a first electrically conductive material having a first conductive material surface connected to the first face and the first surface of the wavelength converting member to be electrically connected to the first electrode and a second conductive material surface opposite to the first conductive material surface in a thickness direction perpendicular to the substantially flat plane;
a second electrically conductive material having a third conductive material surface connected to the first face and the first surface of the wavelength converting member to be electrically connected to the second electrode and a fourth conductive material surface opposite to the third conductive material surface in the thickness direction; and
an insulating member comprising:
a first part disposed on the first electrically conductive material such that the first electrically conductive material is provided between the first part and the first face and is provided between the first part and the wavelength converting member, the first part having a first insulating member surface connected to a part of the second conductive material surface and a second insulating member surface opposite to the first insulating member surface in the thickness direction, the second insulating member surface being separated in the thickness direction from a remaining part of the second conductive material surface other than the part of the second conductive material surface;
a second part disposed on the second electrically conductive material such that the second electrically conductive material is provided between the second part and the first face and is provided between the second part and the wavelength converting member, the second part having a third insulating member surface connected to a part of the fourth conductive material surface and a fourth insulating member surface opposite to the third insulating member surface in the thickness direction, the fourth insulating member surface being separated in the thickness direction from a remaining part of the fourth conductive material surface other than the part of the fourth conductive material surface; and
a third part integrated with the first part and the second part to contact the first face between the first electrode and the second electrode.

2. The light emitting device according to claim 1 ,
wherein the light emitting element has
a second face opposite to the first face in a height direction along a height of the light emitting device and
a lateral face connecting the first face and the second face,

wherein the wavelength converting member covers the second face and the lateral face,
wherein the wavelength converting member has a second surface opposite to the first surface of the wavelength converting member and the first face in the height direction, and
wherein a height difference between a first height and a second height is 5 μm at most, the first height being a height between the first surface and the second surface in the height direction, the second height being a height between the first face and the second surface in the height direction.

3. The light emitting device according to claim 1 ,
wherein the light emitting element has
a second face opposite to the first face in a height direction along a height of the light emitting device and
a lateral face connecting the first face and the second face,

wherein the wavelength converting member covers the second face and the lateral face,
wherein the wavelength converting member has an inner periphery surrounding the light emitting element viewed in the height direction and an outer periphery surrounding the inner periphery viewed in the height direction, and
wherein the outer periphery is covered with a reflective material viewed in the height direction.

4. The light emitting device according to claim 1 , wherein the wavelength converting member has a flexural modulus of 1000 MPa at most.

5. The light emitting device according to claim 1 ,
wherein the insulating member is disposed on a portion of the first electrically conductive material, and
wherein the insulating member is disposed on a portion of the second electrically conductive material.

6. The light emitting device according to claim 1 ,
wherein the light emitting element has
a second face opposite to the first face in a height direction along a height of the light emitting device and
a lateral face connecting the first face and the second face,

wherein the wavelength converting member covers the second face and the lateral face,
wherein the first electrically conductive material has
a first narrow portion having a first end connected to the first electrode and a second end opposite to the first end in a first direction perpendicular to the height direction, and
a first wide portion electrically connected to the second end of the first narrow portion such that the first wide portion does not overlap with the light emitting element when viewed in the height direction, the first narrow portion having a first portion width in a second direction perpendicular to the first direction and the height direction, the first wide portion having a second portion width larger than the first portion width in the second direction.

7. The light emitting device according to claim 6 ,
wherein the light emitting element has an element width in the second direction,
wherein the first portion width is smaller than or equal to the element width of the light emitting element in the second direction, and
wherein the second portion width is larger than the element width of the light emitting element in the second direction.

8. The light emitting device according to claim 6 ,
wherein the second electrically conductive material has
a second narrow portion having a third end connected to the second electrode and a fourth end opposite to the third end in the first direction and
a second wide portion electrically connected to the fourth end of the second narrow portion such that the second wide portion does not overlap with the light emitting element when viewed in the height direction, the second narrow portion having a third portion width in the second direction, the second wide portion having a fourth portion width larger than the third portion width in the second direction, and

wherein the second electrode is opposite to the first electrode in the first direction.

9. The light emitting device according to claim 6 ,
wherein the second electrically conductive material has
a second narrow portion having a third end connected to the second electrode and a fourth end opposite to the third end in the first direction and
a second wide portion electrically connected to the fourth end of the second narrow portion such that the second wide portion does not overlap with the light emitting element when viewed in the height direction, the second narrow portion having a third portion width in the second direction, the second wide portion having a fourth portion width larger than the third portion width in the second direction, and

wherein the second electrode is opposite to the first electrode in the second direction.

10. The light emitting device according to claim 1 ,
wherein the insulating member has a rectangular shape having four corners, and
wherein neither the first el

Assignees

• Nichia Corp

Inventors

• Kuramoto Masafumi
• Iwakura Daisuke

Classifications

• H10W74/019

  using temporary auxiliary substrates (H10W74/017 takes precedence) · CPC title

• H10W74/014

  using batch processing · CPC title

• H10W72/0198

  batch processes · CPC title

• H10W70/09

  extending onto an encapsulation that laterally surrounds the chip or wafer, e.g. fan-out wafer level package [FOWLP] RDLs · CPC title

• H10W70/60

  Insulating or insulated package substrates; Interposers; Redistribution layers (leadframes H10W70/40) · CPC title