Light emitting diodes including integrated backside reflector and die attach

US9437785B2 · kind B2 · utility

Assignee

• Cree, Inc. · US

Inventors

• Michael John Bergmann · Atlanta, US
• Kevin Haberern · Cary, US
• Bradley E. Williams · Worthington, US
• Winston T. Parker · Cary, US
• Arthur Fong-Yuen Pun · Raleigh, US
• Doowon Suh · Warren, US
• Matthew Donofrio · Raleigh, US

Key dates

• Filing date: Aug 10, 2009
• Grant date: Sep 6, 2016
• Expiry date: Jun 21, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/819

Abstract

Light emitting diodes include a silicon carbide substrate having first and second opposing faces, a diode region on the first face, anode and cathode contacts on the diode region opposite the silicon carbide substrate and a hybrid reflector on the silicon carbide substrate opposite the diode region. The hybrid reflector includes a transparent layer having an index of refraction that is lower than the silicon carbide substrate, and a reflective layer on the transparent layer, opposite the substrate. A die attach layer may be provided on the hybrid reflector, opposite the silicon carbide substrate. A barrier layer may be provided between the hybrid reflector and the die attach layer.