# US 10,770,635 B2 · Light-emitting device and manufacturing method thereof

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- Number: US 10,770,635 B2
- Document ID: US10770635B2
- Status: Granted
- Kind: B2
- Application number: 16/419,570
- Filed: 2019-05-22
- Published: 2019-09-05
- Granted: 2020-09-08
- Earliest claimed: 2014-12-24
- Assignees: Epistar Corporation
- Applicants: Epistar Corporation
- Inventors: Chien-Liang Liu; Ming-Chi Hsu; Jen-Chieh Yu
- Web page: https://patentgrep.com/patent/US10770635B2

## CPC

- H10H 20/856: Reflecting means
- H10H 20/8514: {characterised by their shape, e.g. plate or foil}
- H10H 20/8506: {Containers}
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS

## Abstract

This disclosure discloses a light-emitting device. The light-emitting device includes a light-emitting stack with a first (top) surface, a bottom surface and at least one side surface connected to the first surface and the bottom surface, a light-reflective enclosure with a second (top) surface, a contact electrode formed on the bottom surface of the light-emitting layer, and a wavelength converting layer. Moreover, the light-reflective enclosure surrounds the side surface of the light-emitting stack and exposes to the first surface. The wavelength converting layer covers the first surface and the second surface. In addition, the second surface has a plurality of fine concave structures distributed on the second surface.

## Claims

### Claim 1

A light-emitting device, comprising:
a light-emitting stack comprising a top surface, a bottom surface, and a side surface arranged between the top surface and the bottom surface;
a light-reflective enclosure, surrounding the light-emitting stack in a configuration exposing the top surface, and comprising an inner sidewall, a first outer sidewall, and an upper surface between the inner sidewall and the first outer sidewall, wherein the inner sidewall is arranged to face the side surface of the light-emitting stack and the upper surface comprises a first convex area protruded outward from the inner sidewall to the outer sidewall;
a contact electrode formed under the bottom surface of the light-emitting stack; and
a wavelength converting layer covering the top surface and the upper surface, and comprising a second outer sidewall,
wherein the first outer sidewall and the second outer sidewall are coplanar.

### Claim 2 (depends on 1)

The light-emitting device of claim 1, wherein the light-reflective enclosure comprises a plurality of corners, the first convex area corresponds to one of the plurality of corners.

### Claim 3 (depends on 1)

The light-emitting device of claim 1, wherein the inner sidewall is lower than the outer sidewall.

### Claim 4 (depends on 1)

The light-emitting device of claim 1, wherein the upper surface comprises a flat area flush with the top surface and lower than the first convex area.

### Claim 5 (depends on 4)

The light-emitting device of claim 4, wherein the upper surface further comprises a second convex area, and the flat area is disposed between the first convex area and the second convex area.

### Claim 6 (depends on 5)

The light-emitting device of claim 5, wherein the second convex area corresponds to one of a plurality of corners of the light-reflective enclosure.