LIGHT-EMITTING ELEMENT AND FABRICATION METHOD THEREOF

• US 20110291136A1
• Filed: 04/26/2011
• Published: 12/01/2011
• Est. Priority Date: 05/28/2010
• Status: Abandoned Application

• Current Assignee: Advanced Optoelectronic Technology, Inc.
• Original Assignee: Advanced Optoelectronic Technology, Inc.
• Inventors: HUNG, TZU-CHIEN, SHEN, CHIA-HUI
• Application Number:
  US13/094,750
• Publication Number:
  US 20110291136A1
• Time in Patent Office: Days
• US Class Current: 257/98
• CPC Class Codes: H01L 33/22 Roughened surfaces, e.g. at the interface between epitaxial layers
• CPC Class Codes: H01L 33/38 with a particular shape

Abstract

A light-emitting element includes a substrate, a light-emitting module and at least two electrodes. The light-emitting module is formed on the substrate. The at least two electrodes are formed on the light-emitting module. Exterior surfaces of the light-emitting module are separated into a first part and a second part. The first part is defined between the at least two electrodes and the light-emitting module. The second part includes exterior surfaces not contacting the at least two electrodes. The first part is smooth. At least a part of the second part is rough.

Claims

1. A light-emitting element comprising:

a substrate;

a light-emitting module formed on the substrate; and

at least two electrodes formed on the light-emitting module;

wherein exterior surfaces of the light-emitting module are separated into a first part and a second part, the first part defined between the at least two electrodes and the light-emitting module, the second part being exterior surfaces that do not contact the at least two electrodes, the first part being smooth, at least a part of the second part being rough.

2. The light-emitting element of claim 1, wherein all of the second part is rough.

3. The light-emitting element of claim 1, wherein exterior surfaces of the at least two electrodes are rough.

4. The light-emitting element of claim 1, wherein a light diffusion surface is defined between the substrate and the light-emitting module, the light diffusion surface being rough for diffusing light.

5. The light-emitting element of claim 1, wherein thickness of the at least a part of the second part is from 0.1 μ

m to 1 um.

6. A fabrication method for a light-emitting element, the method comprising:

providing a substrate and a light-emitting module;

forming electrodes on the light-emitting module;

forming a photoresist layer on an exterior surfaces of the light-emitting module; and

etching the photoresist layer to obtain a rough exterior surface.

7. The fabrication method for a light-emitting element package of claim 6, wherein the exterior surfaces includes side surfaces of the light-emitting module.

8. The fabrication method for a light-emitting element package of claim 6, further comprising:

forming protection layers on exterior surfaces of the electrodes before forming a photoresist layer on an exterior surfaces of the light-emitting module.

9. The fabrication method for a light-emitting element package of claim 6, further comprising:

etching a surface of the substrate,

wherein the light-emitting module is formed on the etched surface of the substrate.