Surface structured light-emitting diode with improved current coupling

US7135709B1 · kind B1 · utility

Assignee

• OSRAM GmbH · DE

Inventors

• Ralph Wirth · Lappersdorf, DE
• Klaus Streubel · Hemau, DE

Key dates

• Filing date: Sep 21, 2000
• Grant date: Nov 14, 2006
• Expiry date: Sep 21, 2020

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/882

Abstract

Structured-surface light-emitting diode having a light generating layer and a relatively thick, transparent current-spreading layer, vertical structuring of the top surface of the current-spreading layer serves to improve the decoupling of light, while at the same time, a second electrical contact layer with a distributed, lateral structure operates to achieve substantially uniform coupling of electrical current into the current-spreading layer.