Light-emitting diode with non-metallic reflector
First Claim
1. A light-emitting diode (LED) device comprising:
- a substrate;
a non-metallic reflective layer over a surface of the substrate, the non-metallic reflectivelayer being conductive and comprising alternating layers of SixGe1-x and SixC1-x;
a plurality of thermally-conductive vias extending through the non-metallic reflective layer;
a metal layer disposed over the non-metallic reflective layer; and
an LED structure disposed over the metal layer, the LED structure being coupled to the non-metallic reflective layer through the metal layer.
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Accused Products
Abstract
A light-emitting diode (LED) device is provided. The LED device has a substrate, a reflective structure over the substrate, and an LED structure over the reflective structure. The reflective structure is formed of non-metallic materials. In one embodiment, the reflective structure is formed of alternating layers of different non-metallic materials having different refractive indices. In another embodiment, the reflective structure is formed of alternating layers of high-porosity silicon and low-porosity silicon. In yet another embodiment, the reflective structure is formed of silicon dioxide, which may allow the use of fewer layers. The reflective structure may be formed directly on the same substrate as the LED structure or formed on a separate substrate and then bonded to the LED structure.
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Citations
16 Claims
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1. A light-emitting diode (LED) device comprising:
- a substrate;
a non-metallic reflective layer over a surface of the substrate, the non-metallic reflectivelayer being conductive and comprising alternating layers of SixGe1-x and SixC1-x;
a plurality of thermally-conductive vias extending through the non-metallic reflective layer;
a metal layer disposed over the non-metallic reflective layer; and
an LED structure disposed over the metal layer, the LED structure being coupled to the non-metallic reflective layer through the metal layer. - View Dependent Claims (2, 3, 4, 5)
- a substrate;
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6. A light-emitting diode (LED) device comprising:
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a substrate; a reflective structure on a first side of the substrate, the reflective structure comprising at least a first material and a second material, the first material and the second material having different refractive indices and being non-metallic, wherein the reflective structure comprises alternating layers of about 95% porosity silicon and about 30% porosity silicon; a metal layer disposed over the reflective structure; and an LED structure formed over the metal layer; wherein; the LED structure includes an active layer disposed between a first semiconductor layer and a second semiconductor layer, the first and second semiconductor layers having different types of conductivity; and the reflective structure is configured to have a same type of conductivity as one of the first and second semiconductor layers disposed closer to the reflective structure. - View Dependent Claims (7, 8, 9)
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10. A method of forming a light-emitting diode (LED), the method comprising:
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forming a reflective structure on a first substrate, the reflective structure being a conductive, non-metallic structure; forming an LED structure on a second substrate; forming a metal layer over the LED structure; bonding the metal layer to the reflective structure using a thermally conductive material other than an oxide; and removing the second substrate. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification