LED with substrate modifications for enhanced light extraction and method of making same

US8034647B2 · kind B2 · utility

Assignee

• Cree, Inc. · US

Inventors

• Max Batres · Lompoc, US
• James Ibbetson · Lompoc, US
• Ting Li · Ventura, US
• Adam William Saxler · Durham, US

Key dates

• Filing date: Jun 22, 2010
• Grant date: Oct 11, 2011
• Expiry date: Jun 22, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/01

Abstract

The surface morphology of an LED light emitting surface is changed by applying processes, such as a reactive ion etch (RIE) process to the light emitting surface. In one embodiment, the changed surface morphology takes the form of a moth-eye surface. The surface morphology created by the RIE process may be emulated using different combinations of non-RIE processes such as grit sanding and deposition of a roughened layer of material or particles followed by dry etching.