Light emitting diode package and method of manufacture
First Claim
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1. A light emitting device, comprising:
- an optically transparent cover substrate;
an optically transparent layer contacting a bottom surface of said optically transparent cover substrate, said optically transparent layer including an optically definable material wherein said optically definable material is disposed in a portion of said optically transparent layer;
a semiconductor LED including a LED carrier layer, a positively-doped region, an intrinsic region, and a negatively-doped region, wherein said intrinsic region is between said positively-doped region and said negatively-doped region, said LED carrier layer disposed on said negatively-doped region, said LED carrier layer contacting a first portion of a bottom surface of said optically transparent layer;
a passivation layer disposed on said semiconductor LED and on an exposed portion of said bottom surface of said optically transparent layer;
a first electrical contact disposed in a first contact hole defined in said passivation layer, said first electrical contact in electrical communication with said positively-doped region; and
a second electrical contact disposed in a second contact hole defined in said passivation layer and said semiconductor LED, said second electrical contact in electrical communication with said negatively-doped region,wherein a first surface of said semiconductor LED has a first length along a horizontal axis, said horizontal axis parallel to said first surface of said semiconductor LED, andwherein said portion of said optically transparent layer has a second length with respect to said horizontal axis, said second length less than said first length.
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Abstract
A light emitting diode (LED) device and packaging for same is disclosed. In some aspects, the LED is manufactured using a vertical configuration including a plurality of layers. Certain layers act to promote mechanical, electrical, thermal, or optical characteristics of the device. The device avoids design problems, including manufacturing complexities, costs and heat dissipation problems found in conventional LED devices. Some embodiments include a plurality of optically permissive layers, including an optically permissive cover substrate or wafer stacked over a semiconductor LED and positioned using one or more alignment markers.
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Citations
14 Claims
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1. A light emitting device, comprising:
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an optically transparent cover substrate; an optically transparent layer contacting a bottom surface of said optically transparent cover substrate, said optically transparent layer including an optically definable material wherein said optically definable material is disposed in a portion of said optically transparent layer; a semiconductor LED including a LED carrier layer, a positively-doped region, an intrinsic region, and a negatively-doped region, wherein said intrinsic region is between said positively-doped region and said negatively-doped region, said LED carrier layer disposed on said negatively-doped region, said LED carrier layer contacting a first portion of a bottom surface of said optically transparent layer; a passivation layer disposed on said semiconductor LED and on an exposed portion of said bottom surface of said optically transparent layer; a first electrical contact disposed in a first contact hole defined in said passivation layer, said first electrical contact in electrical communication with said positively-doped region; and a second electrical contact disposed in a second contact hole defined in said passivation layer and said semiconductor LED, said second electrical contact in electrical communication with said negatively-doped region, wherein a first surface of said semiconductor LED has a first length along a horizontal axis, said horizontal axis parallel to said first surface of said semiconductor LED, and wherein said portion of said optically transparent layer has a second length with respect to said horizontal axis, said second length less than said first length. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A light emitting device, comprising:
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an optically transparent cover substrate; an optically transparent layer contacting a bottom surface of said optically transparent cover substrate, said optically transparent layer including an optically definable material wherein said optically definable material is disposed in a portion of said optically transparent layer; a semiconductor LED including a LED carrier layer, a positively-doped region, an intrinsic region, and a negatively-doped region, wherein said intrinsic region is between said positively-doped region and said negatively-doped region, said LED carrier layer disposed on said negatively-doped region, said LED carrier layer contacting a first portion of a bottom surface of said optically transparent layer; a passivation layer disposed on said semiconductor LED and on an exposed portion of said bottom surface of said optically transparent layer; a first electrical contact disposed in a first contact hole defined in said passivation layer, said first electrical contact in electrical communication with said positively-doped region; and a second electrical contact disposed in a second contact hole defined in said passivation layer and said semiconductor LED, said second electrical contact in electrical communication with said negatively-doped region, wherein said optically transparent layer has a first height along a vertical axis, said vertical axis orthogonal to said bottom surface of said optically transparent layer, and wherein said portion of said optically transparent layer has a second height along said vertical axis, said second height less than said first height. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification