SEMICONDUCTOR LIGHT EMITTING DEVICES WITH SEPARATED WAVELENGTH CONVERSION MATERIALS AND METHODS OF FORMING THE SAME
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United States of America Patent
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app pub date -
Oct 15, 2008
filing date -
Aug 7, 2007
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Abandoned
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Abstract
A semiconductor device includes a semiconductor light emitting device (LED) that emits light having a first peak wavelength upon the application of a voltage thereto, and first and second phosphor-containing regions on the LED that receive the light and convert at least a portion of the light to light having a longer wavelength. The first phosphor-containing region is between the second phosphor-containing region and the LED so that a light ray emitted by the LED passes through the first phosphor-containing region before passing through the second phosphor-containing region. The first phosphor-containing region is configured to convert light emitted by the LED to light having a second peak wavelength and the second phosphor-containing region is configured to convert light emitted by the LED to light having a third peak wavelength, shorter than the second peak wavelength.
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