Stress-alleviation layer for LED structures
First Claim
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1. A semiconductor structure, the structure comprising:
- a dice comprising;
a substrate;
a non-crystalline stress-alleviation layer on the substrate;
open regions and a first stress-alleviation region on the substrate, the first stress-alleviation region being a part of the non-crystalline stress-alleviation layer and forming a ring-like structure along the periphery of the dice, the first stress-alleviation region surrounding all of the open regions on the dice, and the first stress-alleviation region not contacting another part of the non-crystalline stress-alleviation layer; and
epitaxial layers on the substrate, at least in the open regions, forming light emitting diode (LED) structures therein, the LED structures having bottom surfaces proximate the substrate and top surfaces distal the substrate, the non-crystalline stress-alleviation layer having a top surface substantially coplanar with the top surfaces of the LED structures.
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Abstract
A light emitting diodes (LEDs) is presented. The LED includes a stress-alleviation layer on a substrate. Open regions and stress-alleviation layer regions are formed on the substrate. Epitaxial layers are disposed on the substrate, at least in the open regions therein, thereby forming an LED structure. The substrate is diced through at least a first portion of the stress-alleviation regions, thereby forming the plurality of LEDs.
9 Citations
21 Claims
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1. A semiconductor structure, the structure comprising:
a dice comprising; a substrate; a non-crystalline stress-alleviation layer on the substrate; open regions and a first stress-alleviation region on the substrate, the first stress-alleviation region being a part of the non-crystalline stress-alleviation layer and forming a ring-like structure along the periphery of the dice, the first stress-alleviation region surrounding all of the open regions on the dice, and the first stress-alleviation region not contacting another part of the non-crystalline stress-alleviation layer; and epitaxial layers on the substrate, at least in the open regions, forming light emitting diode (LED) structures therein, the LED structures having bottom surfaces proximate the substrate and top surfaces distal the substrate, the non-crystalline stress-alleviation layer having a top surface substantially coplanar with the top surfaces of the LED structures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A semiconductor structure, the structure comprising:
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a substrate having a major surface; a plurality of non-crystalline, non-continuous stress-alleviation regions formed on the substrate, the plurality of stress-alleviation regions having bottom surfaces proximate the substrate and top surfaces distal the substrate; and a plurality of light emitting diode (LED) structures formed on the substrate, wherein at least two of the plurality of LED structures comprise a stack of layers having substantially coterminous sidewalls, each of the substantially coterminous sidewalls contacting an at least one stress-alleviation region and extending from the substrate to the top surface of the at least one stress-alleviation region. - View Dependent Claims (12, 13, 14, 15)
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16. A light emitting diode (LED) comprising:
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a substrate; stress-alleviation regions, at least one stress-alleviation region comprising a non-crystalline region, surrounded on all sides by an LED structure and physically separated from any other stress-alleviation region; the LED structure comprising; a buffer layer disposed on the substrate; a quantum-well layer; and a top-side contact, wherein a first contact epitaxial layer is interposed between the buffer layer and the quantum-well layer, and wherein a second contact epitaxial layer is interposed between the quantum-well layer and the top-side contact, and wherein an at least one of the stress-alleviation regions borders the LED structure. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification