LUMINESCENT CERAMIC FOR A LIGHT EMITTING DEVICE
First Claim
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1. A method comprising:
- providing a light emitting device including a semiconductor structure comprising III-nitride light emitting layer disposed between an n-type region and a p-type region;
mounting the light emitting device on a mount; and
connecting a ceramic layer comprising a wavelength converting material to a surface of the device from which light is extracted.
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Abstract
A semiconductor light emitting device comprising a light emitting layer disposed between an n-type region and a p-type region is combined with a ceramic layer which is disposed in a path of light emitted by the light emitting layer. The ceramic layer is composed of or includes a wavelength converting material such as a phosphor. Luminescent ceramic layers according to embodiments of the invention may be more robust and less sensitive to temperature than prior art phosphor layers. In addition, luminescent ceramics may exhibit less scattering and may therefore increase the conversion efficiency over prior art phosphor layers.
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15 Claims
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1. A method comprising:
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providing a light emitting device including a semiconductor structure comprising III-nitride light emitting layer disposed between an n-type region and a p-type region; mounting the light emitting device on a mount; and connecting a ceramic layer comprising a wavelength converting material to a surface of the device from which light is extracted. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification