Semiconductor light emitting device and semiconductor light emitting device package using the same

Patent metadata

Field	Value
Publication number	US-10811568-B2
Application number	US-201816181592-A
Country	US
Kind code	B2
Filing date	Nov 6, 2018
Priority date	May 11, 2018
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

A semiconductor light emitting device includes a first conductivity-type semiconductor layer including a recessed region and a protruding region, an active layer and a second conductivity-type semiconductor layer on the protruding region, a reflective electrode layer disposed on the second conductivity-type semiconductor layer, an insulating layer including a first opening disposed on a contact region of the first conductivity-type semiconductor layer and a second opening disposed on a contact region of the reflective electrode layer, a first conductive pattern disposed on the insulating layer, and extending into the first opening to be electrically connected to the contact region of the first conductivity-type semiconductor layer, a second conductive pattern disposed on the insulating layer, and extending into the second opening to be electrically connected to the reflective electrode layer, and a multilayer insulating structure covering the first and second conductive patterns.

First claim

What is claimed is:

1. A semiconductor light emitting device package comprising:
a package body comprising a trench in which a first multilayer insulating structure is disposed on an internal surface of the trench;
a semiconductor light emitting device electrically connected by flip chip bonding in the trench; and
an encapsulation portion filling an interior of the trench to cover the semiconductor light emitting device,
wherein the semiconductor light emitting device comprises:
a first conductivity-type semiconductor layer comprising a recessed region and a protruding region;
an active layer and a second conductivity-type semiconductor layer sequentially stacked on the protruding region of the first conductivity-type semiconductor layer;
a reflective electrode layer disposed on the second conductivity-type semiconductor layer;
an insulating layer covering the first conductivity-type semiconductor layer and the reflective electrode layer, wherein the insulating layer comprises a first opening disposed on a contact region of the first conductivity-type semiconductor layer and a second opening disposed on a contact region of the reflective electrode layer;
a first conductive pattern disposed on the insulating layer, wherein the first conductive pattern extends into the first opening of the insulating layer to be electrically connected to the contact region of the first conductivity-type semiconductor layer;
a second conductive pattern disposed on the insulating layer, wherein the second conductive pattern extends into the second opening of the insulating layer to be electrically connected to the reflective electrode layer; and
a second multilayer insulating structure covering the first and second conductive patterns, wherein the second multilayer insulating structure comprises third and fourth openings disposed on the first and second conductive patterns,
wherein the first multilayer insulating structure comprises a distributed Bragg reflector in which a first layer having a first refractive index and a second layer having a second refractive index higher than the first refractive index are alternately stacked, and the second multilayer insulating structure comprises a distributed Bragg reflector in which a third layer having the first refractive index and a fourth layer having the second refractive index are alternately stacked, and
wherein the first and second multilayer insulating structures have substantially a same total thickness.

2. The semiconductor light emitting device package of claim 1 , wherein the second multilayer insulating structure has a first surface in contact with the first and second conductive patterns, and a second surface facing the first surface; and
the first surface is provided with the third layer disposed thereon, and the second surface is provided with the fourth layer disposed thereon.

3. The semiconductor light emitting device package of claim 2 , wherein the first multilayer insulating structure has a third surface in contact with the package body, and a fourth surface facing the third surface; and
the third surface is provided with the first layer disposed thereon, and the fourth surface is provided with the second layer disposed thereon.

4. The semiconductor light emitting device package of claim 3 , wherein the second layer disposed on the fourth surface has a thickness of λ/2n 2 , where λ is a wavelength of light emitted by the active layer, and n 2 is the second refractive index.

5. The semiconductor light emitting device package of claim 2 , wherein the fourth layer disposed on the second surface has a thickness of λ2n 2 , where λ is a wavelength of light emitted by the active layer, and n 2 is the second refractive index.

6. The semiconductor light emitting device package of claim 1 , wherein the encapsulation portion comprises a light transmissive material, and a refractive index of the light transmissive material is higher than the first refractive index and lower than the second refractive index.

7. The semiconductor light emitting device package of claim 1 , wherein the first and second multilayer insulating structures have substantially a same stacking structure.

8. The semiconductor light emitting device package of claim 1 , wherein the package body further comprises first and second lead frames exposed on a lower surface-of the trench, and
the semiconductor light emitting device is electrically connected to the first and second lead frames through the first multilayer insulating structure.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Tae Hun
• Sim Jae In
• Yoon Ju Heon

Classifications

• H10H20/857

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

• H10H20/852

  Encapsulations · CPC title

• H10H20/85

  Packages · CPC title

• H10H20/835 Primary

  Reflective materials · CPC title

• H10H20/831

  characterised by their shape · CPC title