Light emitting device having a high resistivity cushion layer
First Claim
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1. A light emitting device having a high resistivity cushion layer, comprising:
- a substrate;
a first cladding layer formed on the substrate;
an active layer formed on the first cladding layer;
a second cladding layer formed on the active layer;
a cushion layer formed on the second cladding layer and having a resistivity higher than that of the second cladding layer;
a contact layer formed on the cushion layer; and
a transparent conductive layer formed on the contact layer.
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Abstract
A light emitting device having a high resistivity cushion layer, comprising a substrate; a first cladding layer formed on the substrate; an active layer formed on the first cladding layer; a second cladding layer formed on the active layer; a high resistivity cushion layer formed on the second cladding layer and having a resistivity higher than that of the second cladding layer; a contact layer formed on the high resistivity cushion layer; and a transparent conductive layer formed on the contact layer.
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Citations
58 Claims
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1. A light emitting device having a high resistivity cushion layer, comprising:
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a substrate;
a first cladding layer formed on the substrate;
an active layer formed on the first cladding layer;
a second cladding layer formed on the active layer;
a cushion layer formed on the second cladding layer and having a resistivity higher than that of the second cladding layer;
a contact layer formed on the cushion layer; and
a transparent conductive layer formed on the contact layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A light emitting device having a high resistivity cushion layer, comprising:
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a first electrode;
a substrate formed on the first electrode;
a first cladding layer formed on the substrate;
an active layer formed on the first cladding layer;
a second cladding layer formed on the active layer;
a cushion layer formed on the second cladding layer and having a resistivity higher than that of the second cladding layer;
a contact layer formed on the cushion layer for providing an ohmic contact, the contact layer being formed with a through hole that exposes a portion of the cushion layer;
a transparent conductive layer formed on the contact layer and filling in the through hole in the contact layer; and
a second electrode formed on a portion of the transparent conductive layer, the second electrode being approximately aligned with the through hole in the contact layer. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A light emitting device having a high resistivity cushion layer, comprising:
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a substrate;
an active layer;
a first cladding layer between the substrate and the active layer;
a second cladding layer;
a cushion layer, having a resistivity higher than the second cladding layer, wherein the second cladding layer is between the active layer and the cushion layer;
a transparent conductive layer; and
a contact layer interposed between at least a portion of the cushion layer and at least a portion of the transparent conductive layer. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A light emitting device having a high resistivity cushion layer, comprising:
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a substrate;
an active layer;
a first cladding layer between the substrate and the active layer;
a second cladding layer;
a cushion layer having a resistivity higher than the second cladding layer, wherein the second cladding layer is between the active layer and the cushion layer;
a transparent conductive layer; and
a contact layer having a through hole interposed between a portion of the cushion layer and a first portion of the transparent conductive layer, and wherein a second portion of the transparent conductive layer fills in the through hole to form a Schottky barrier. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56)
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57. A device having a high resistivity cushion layer, comprising:
a transparent conductive layer disposed on a substrate, wherein at least a first cladding layer, an active layer, a second cladding layer, and a cushion layer having a resistivity higher than the second cladding layer are interposed between the substrate and transparent conductive layer in the referenced order, and further wherein a contact layer is interposed between at least a portion of the cushion layer and a at least a portion of the transparent conductive layer.
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58. A light emitting device having a high resistivity cushion layer according to claim 58, wherein the device is surface emitting.
Specification
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Current AssigneeEpistar Corporation (Ennostar, Inc.)
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Original AssigneeEpistar Corporation (Ennostar, Inc.)
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InventorsLee, Biing-Jye, Chin, Ming-Ta, Jou, Ming-Jiunn
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Application NumberUS10/767,402Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current257/79CPC Class CodesH01L 33/02 characterised by the semico...H01L 33/14 with a carrier transport co...
