Invention Grant
US08080879B2 Electrode structures for LEDs with increased active area 有权
具有增加的有效面积的LED的电极结构

  • Patent Title: Electrode structures for LEDs with increased active area
  • Patent Title (中): 具有增加的有效面积的LED的电极结构
  • Application No.: US12772767
    Application Date: 2010-05-03
  • Publication No.: US08080879B2
    Publication Date: 2011-12-20
  • Inventor: Frank T. Shum
  • Applicant: Frank T. Shum
  • Applicant Address: US CA Livermore
  • Assignee: Bridgelux, Inc.
  • Current Assignee: Bridgelux, Inc.
  • Current Assignee Address: US CA Livermore
  • Agent Michael S. Garrabrants
  • Main IPC: H01L33/00
  • IPC: H01L33/00
Electrode structures for LEDs with increased active area
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. The semiconductor material can have a cutout formed therein and a portion of the electrode can be formed outside of the cutout and a portion of the electrode can be formed inside of the cutout. The portion of the electrode outside the cutout can be electrically isolated from the semiconductor material by the dielectric material.
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