Device with inverted large scale light extraction structures
First Claim
1. A device comprising:
- a first at least partially transparent layer having a first profiled surface, wherein the first profiled surface comprises a set of large roughness components providing a first variation of the first profiled surface having a first characteristic scale over at least a portion of a lateral surface of the first at least partially transparent layer; and
a second at least partially transparent layer having a second profiled surface facing and adjacent to the first profiled surface, wherein the second profiled surface comprises a set of small roughness components providing a second variation of the second profiled surface having a second characteristic scale over at least a portion of a lateral surface of the second at least partially transparent layer, wherein the first profiled surface does not include any region having the second characteristic scale, wherein the second characteristic scale is on the order of a target wavelength of radiation, and wherein the first characteristic scale is approximately an order of magnitude larger than the second characteristic scale.
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Accused Products
Abstract
An interface including roughness components for improving the propagation of radiation through the interface is provided. The interface includes a first profiled surface of a first layer comprising a set of large roughness components providing a first variation of the first profiled surface having a first characteristic scale and a second profiled surface of a second layer comprising a set of small roughness components providing a second variation of the second profiled surface having a second characteristic scale. The first characteristic scale is approximately an order of magnitude larger than the second characteristic scale. The surfaces can be bonded together using a bonding material, and a filler material also can be present in the interface.
59 Citations
20 Claims
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1. A device comprising:
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a first at least partially transparent layer having a first profiled surface, wherein the first profiled surface comprises a set of large roughness components providing a first variation of the first profiled surface having a first characteristic scale over at least a portion of a lateral surface of the first at least partially transparent layer; and a second at least partially transparent layer having a second profiled surface facing and adjacent to the first profiled surface, wherein the second profiled surface comprises a set of small roughness components providing a second variation of the second profiled surface having a second characteristic scale over at least a portion of a lateral surface of the second at least partially transparent layer, wherein the first profiled surface does not include any region having the second characteristic scale, wherein the second characteristic scale is on the order of a target wavelength of radiation, and wherein the first characteristic scale is approximately an order of magnitude larger than the second characteristic scale. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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creating a device design defining a plurality of attributes of a device including an interface between first and second at least partially transparent layers, wherein the interface in the device design includes; a first profiled surface of the first at least partially transparent layer, wherein the first profiled surface comprises a set of large roughness components providing a first variation of the first profiled surface having a first characteristic scale over at least a portion of a lateral surface of the first at least partially transparent layer; and a second profiled surface of the second at least partially transparent layer facing and adjacent to the first profiled surface, wherein the second profiled surface comprises a set of small roughness components providing a second variation of the second profiled surface having a second characteristic scale over at least a portion of a lateral surface of the second at least partially transparent layer, wherein the first profiled surface does not include any region having the second characteristic scale, wherein the second characteristic scale is on the order of a target wavelength of radiation, and wherein the first characteristic scale is approximately an order of magnitude larger than the second characteristic scale; and storing the device design on a non-transitory computer readable medium. - View Dependent Claims (12, 13, 14, 15, 16)
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17. An emitting device comprising:
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an active region configured to generate radiation; a first at least partially transparent layer having a first profiled surface, wherein the first profiled surface comprises a set of large roughness components providing a first variation of the first profiled surface having a first characteristic scale over at least a portion of a lateral surface of the first at least partially transparent layer; and a second at least partially transparent layer having a second profiled surface facing and adjacent to the first profiled surface, wherein the second profiled surface comprises a set of small roughness components providing a second variation of the second profiled surface having a second characteristic scale, wherein the first characteristic scale is approximately an order of magnitude larger than the second characteristic scale over at least a portion of a lateral surface of the second at least partially transparent layer, wherein the first profiled surface does not include any region having the second characteristic scale, wherein the second characteristic scale is on the order of a wavelength of the radiation generated by the active region, and wherein radiation generated by the active region passes through the second at least partially transparent layer before entering the first at least partially transparent layer. - View Dependent Claims (18, 19, 20)
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Specification