Light emitting device with dislocation bending structure
DCFirst Claim
1. An emitting device comprising:
- a substrate;
an active region located on a first side of the substrate; and
a dislocation bending structure located between the substrate and the active region, wherein the dislocation bending structure comprises at least forty pairs of adjacent layers, wherein each pair of adjacent layers includes;
a first layer composed of a material including an element; and
a second layer composed of a material including the element, wherein a molar fraction of the element differs for the first layer and the second layer by at least five percent.
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Abstract
A solution for reducing a number of dislocations in an active region of an emitting device is provided. A dislocation bending structure can be included in the emitting device between the substrate and the active region. The dislocation bending structure can be configured to cause dislocations to bend and/or annihilate prior to reaching the active region, e.g., due to the presence of a sufficient amount of strain. The dislocation bending structure can include a plurality of layers with adjacent layers being composed of a material, but with molar fractions of an element in the respective material differing between the two layers. The dislocation bending structure can include at least forty pairs of adjacent layers having molar fractions of an element differing by at least five percent between the adjacent layers.
25 Citations
27 Claims
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1. An emitting device comprising:
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a substrate; an active region located on a first side of the substrate; and a dislocation bending structure located between the substrate and the active region, wherein the dislocation bending structure comprises at least forty pairs of adjacent layers, wherein each pair of adjacent layers includes; a first layer composed of a material including an element; and a second layer composed of a material including the element, wherein a molar fraction of the element differs for the first layer and the second layer by at least five percent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 22, 25)
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11. An emitting device comprising:
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a substrate; an active region located on a first side of the substrate; and a dislocation bending structure located between the substrate and the active region, wherein the dislocation bending structure comprises a means for causing at least some dislocations propagating from the substrate to at least one of;
bend or annihilate, prior to reaching the active region, and wherein the means for causing includes a plurality of non-overlapping periods, wherein each period includes;a first layer composed of a material including an element; and a second layer composed of a material including the element, wherein a molar fraction of the element differs for the first layer and the second layer by at least five percent. - View Dependent Claims (12, 13, 14, 15, 20, 23, 26)
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16. A method of manufacturing an emitting device, the method comprising:
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forming a dislocation bending structure on a first side of a substrate, wherein the dislocation bending structure comprises a means for causing at least some dislocations propagating from the substrate to at least one of;
bend or annihilate, prior to reaching the active region, wherein the forming the dislocation bending structure includes forming a plurality of non-overlapping periods, wherein each period includes;a first layer composed of a material including an element; and a second layer composed of a material including the element, wherein a molar fraction of the element differs for the first layer and the second layer by at least five percent; and forming an active region on an opposing side of the dislocation bending structure as the substrate. - View Dependent Claims (17, 18, 19, 21, 24, 27)
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Specification