Invention Application
US20140034987A1 COMPOSITE HIGH REFLECTIVITY LAYER 有权
复合高反射层

  • Patent Title: COMPOSITE HIGH REFLECTIVITY LAYER
  • Patent Title (中): 复合高反射层
  • Application No.: US14047566
    Application Date: 2013-10-07
  • Publication No.: US20140034987A1
    Publication Date: 2014-02-06
  • Inventor: JAMES IBBETSONTING LIMONICA HANSEN
  • Applicant: CREE,INC.
  • Applicant Address: US NC DURHAM
  • Assignee: CREE,INC.
  • Current Assignee: CREE,INC.
  • Current Assignee Address: US NC DURHAM
  • Main IPC: H01L33/46
  • IPC: H01L33/46
COMPOSITE HIGH REFLECTIVITY LAYER
Abstract:
A high efficiency light emitting diode with a composite high reflectivity layer integral to said LED to improve emission efficiency. One embodiment of a light emitting diode (LED) chip comprises an LED and a composite high reflectivity layer integral to the LED to reflect light emitted from the active region. The composite layer comprises a first layer, and alternating plurality of second and third layers on the first layer, and a reflective layer on the topmost of said plurality of second and third layers. The second and third layers have a different index of refraction, and the first layer is at least three times thicker than the thickest of the second and third layers. For composite layers internal to the LED chip, conductive vias can be included through the composite layer to allow an electrical signal to pass through the composite layer to the LED.
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