Method and apparatus for providing a patterned electrically conductive and optically transparent or semi-transparent layer over a lighting semiconductor device

US8183575B2 · kind B2 · utility

Assignee

• Bridgelux, Inc. · US

Inventors

• Todd Farmer · Livermore, US
• Steve Lester · Palo Alto, US

Key dates

• Filing date: Jan 26, 2009
• Grant date: May 22, 2012
• Expiry date: Jan 26, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/833

Abstract

A light emitting diode (“LED”) using an electrical conductive and optical transparent or semi-transparent layer to improve overall light output is disclosed. The device includes a first conductive layer, an active layer, a second conductive layer, an electrical conductive and optical transparent or semi-transparent layer, and electrodes. In one embodiment, the electrical conductive and optical transparent or semi-transparent layer has a first surface and a second surface, wherein the first surface is overlain the second conductive layer. The second surface includes a pattern which contains thick regions and thin regions for facilitating light passage.