Method of forming light-generating device including reflective layer
First Claim
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1. A method of forming a light-generating device, comprising:
- forming a plurality of light-emitting diodes (LEDs) over a substrate, the LEDs each including a first group III-V compound layer, a second group Ill-V compound layer, and an active layer disposed between the first group III-V compound layer and the second group ill-V compound layer, wherein the LEDs are physically separated from one another;
forming spacers on side surfaces of each of the LEDs; and
thereafter forming a reflective material over portions of the substrate that are not covered by the LEDs and the spacers, wherein the reflective material is formed below the active layer of the LEDs.
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Abstract
A system and method for manufacturing a light-generating device is described. A preferred embodiment comprises a plurality of LEDs formed on a substrate. Each LED preferably has spacers along the sidewalls of the LED, and a reflective surface is formed on the substrate between the LEDs. The reflective surface is preferably located lower than the active layer of the individual LEDs.
50 Citations
16 Claims
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1. A method of forming a light-generating device, comprising:
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forming a plurality of light-emitting diodes (LEDs) over a substrate, the LEDs each including a first group III-V compound layer, a second group Ill-V compound layer, and an active layer disposed between the first group III-V compound layer and the second group ill-V compound layer, wherein the LEDs are physically separated from one another; forming spacers on side surfaces of each of the LEDs; and thereafter forming a reflective material over portions of the substrate that are not covered by the LEDs and the spacers, wherein the reflective material is formed below the active layer of the LEDs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of forming a light-generating device, comprising:
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forming a first group III-V compound layer over a substrate; forming an active layer over the first group III-V compound layer; forming a second group III-V compound layer over the active layer; patterning the second group III-V compound layer, the active layer, and the first group III-V compound layer into a plurality of nano-sized LEDs, wherein a ratio of a lateral dimension of each nano-sized LED and a wavelength of a light emitted by the nano-sized LED is in a range from about 0.3 to about 3; forming spacers on sidewalls of the LEDs; and thereafter forming a reflective material over the substrate and between the spacers. - View Dependent Claims (10, 11, 12, 13)
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14. A method for forming a light-generating device, the method comprising:
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providing a substrate; forming a plurality of light-emitting diodes on the substrate, each of the plurality of light-diodes comprising an active layer; and forming a reflective layer on the substrate, wherein the reflective layer is located between adjacent ones of the plurality of light emitting diodes and below the active layers, and wherein the forming a reflective layer includes forming spacers along sidewalls of the plurality of light-emitting diodes and filling an area between the spacers and over the reflective layer with a light-transmissive material. - View Dependent Claims (15)
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16. A method for forming a light-generating device, the method comprising:
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providing a substrate; forming a plurality of light-emitting diodes on the substrate, each of plurality of light-emitting diodes comprising an active layer; and forming a reflective layer on the substrate, wherein the reflective layer is located between adjacent ones of the plurality of light-emitting diodes and below the active layers, and wherein the forming a plurality of light-emitting diodes comprises; forming a first contact layer; forming an active layer over the first contact layer; forming a second contact layer over the active layer; forming a hard mask over the second contact layer, the hard mask exposing portions of the second contact layer; and etching the exposed portions of the second contact layer, the active layer, and the first contact layer to form the plurality of light-emitting diodes.
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Specification