COMPOSITE HIGH REFLECTIVITY LAYER
First Claim
1. A light emitting diode (LED) chip, comprising:
- an active region between an n-type layer and a p-type layer;
a composite high reflectivity layer on said n-type layer and on said p-type layer.
1 Assignment
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Accused Products
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.
17 Citations
12 Claims
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1. A light emitting diode (LED) chip, comprising:
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an active region between an n-type layer and a p-type layer; a composite high reflectivity layer on said n-type layer and on said p-type layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification