Low optical loss electrode structures for LEDs

US8124433B2 · kind B2 · utility

Assignee

• Bridgelux, Inc. · US

Inventors

• Frank Shum · Sunnyvale, US
• William W. So · Sunnyvale, US
• Steven B. Lester · Sunnyvale, US

Key dates

• Filing date: Feb 4, 2010
• Grant date: Feb 28, 2012
• Expiry date: Feb 4, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/857

Abstract

An electrode structure is disclosed for enhancing the brightness and/or efficiency of an LED. The electrode structure can have a metal electrode and an optically transmissive thick dielectric material formed intermediate the electrode and a light emitting semiconductor material. The electrode and the thick dielectric cooperate to reflect light from the semiconductor material back into the semiconductor so as to enhance the likelihood of the light ultimately being transmitted from the semiconductor material. Such LED can have enhanced utility and can be suitable for uses such as general illumination.