JP5727320B2 - エピタキシャル層を有するAlGaInNベースLED - Google Patents
エピタキシャル層を有するAlGaInNベースLED Download PDFInfo
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- JP5727320B2 JP5727320B2 JP2011155884A JP2011155884A JP5727320B2 JP 5727320 B2 JP5727320 B2 JP 5727320B2 JP 2011155884 A JP2011155884 A JP 2011155884A JP 2011155884 A JP2011155884 A JP 2011155884A JP 5727320 B2 JP5727320 B2 JP 5727320B2
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- algainn
- epitaxial structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/26—Materials of the light emitting region
- H01L33/30—Materials of the light emitting region containing only elements of group III and group V of the periodic system
- H01L33/32—Materials of the light emitting region containing only elements of group III and group V of the periodic system containing nitrogen
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/025—Physical imperfections, e.g. particular concentration or distribution of impurities
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/10—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a light reflecting structure, e.g. semiconductor Bragg reflector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S438/00—Semiconductor device manufacturing: process
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Description
12 サファイア基板
14 多層エピタキシャル構造
16 上部GaN領域
18 活性領域
20 下部GaN領域
22 オームp接触
24 オームn接触
26 半透明金属層
28 緩衝層
30 光線経路例
32 AlInGaNベースLED
34 基板
36 多層エピタキシャル構造
38 活性領域
40 上部GaN領域
42 下部GaN領域
44 n型GaN層を含む部分
46 ドーピングされていない層を含む部分
48 緩衝層
50 オームp接触
52 オームn接触
54 半透明金属層
56、58、60 光線経路例
62 基板を用意するステップ
64 基板上面にテクスチャをつけるステップ
66 基板上に緩衝層を成膜するステップ
68 緩衝層上に多層エピタキシャル構造を形成するステップ
70 p型Gan領域上にNiO層を成膜するステップ
72 NiO層上にAu層を成膜するステップ
74 Au及びNiO層をアニールするステップ
Claims (21)
- 屈折率が2.1よりも小さい基板と、該基板に結合した多層エピタキシャル構造と、を含むAlGaInN発光ダイオード素子であって、
前記多層エピタキシャル構造が、上部AlGaInN領域、活性領域及び下部AlGaInN領域を含み、前記上部及び下部AlGaInN領域はアルミニウム、ガリウム、インジウム及び窒素からなる群より選択した少なくとも1元素で作られた複数のエピタキシャル層を含み、前記多層エピタキシャル構造が少なくとも4μmの厚みを持ち、前記多層エピタキシャル構造の前記厚みによって、前記活性領域から放出された光のうち、前記多層エピタキシャル構造の側面を通じて抽出される光の量が増大し、
前記基板の、前記多層エピタキシャル構造と結合させる面がテクスチャをつけられた面であり、前記テクスチャ面が、前記テクスチャ面上に突き当たる光のランダム化を促進することを特徴とするAlGaInN発光ダイオード素子。 - 前記多層エピタキシャル構造の成長中に特定の特性を提供する為に前記基板に酸化亜鉛の層を設けることを特徴とする請求項1に記載の素子。
- 前記多層エピタキシャル構造の成長中に特定の特性を提供する為に前記基板に二酸化珪素の層を設けることを特徴とする請求項1に記載の素子。
- 前記多層エピタキシャル構造の成長中に特定の特性を提供する為に前記基板に誘電体の層を設けることを特徴とする請求項1に記載の素子。
- 前記下部AlGaInN領域は、n型AlGaInNエピタキシャル層及びドーピングされていないエピタキシャル層から成ることを特徴とする請求項1〜4のいずれかに記載の素子。
- 前記下部AlGaInN領域は、3μmよりも大きい厚みを持つことを特徴とする請求項1〜5のいずれかに記載の素子。
- 前記基板の、前記多層エピタキシャル構造と結合させる前記面は、研磨粒子で機械的にテクスチャがつけられていることを特徴とする請求項1〜6のいずれかに記載の素子。
- 前記基板の、前記多層エピタキシャル構造と結合させる前記面は、ウエット又はドライエッチングによりテクスチャがつけられていることを特徴とする請求項1〜6のいずれかに記載の素子。
- 前記多層エピタキシャル構造の上面がテクスチャをつけられた面であることを特徴とする請求項1〜8のいずれかに記載の素子。
- 屈折率が2.1よりも小さい基板を用意するステップと、少なくとも4μmの厚さを持つ多層エピタキシャル構造を前記基板上に形成するステップと、を含むAlGaInN発光ダイオード素子の製造方法であって、
前記多層エピタキシャル構造を形成するステップが、上部AlGaInN領域、活性領域及び下部AlGaInN領域を、窒化アルミニウムガリウムインジウムをベースにした材料の層を成膜することにより形成するステップを含み、前記活性領域が前記上部及び下部AlGaInN領域の間に形成され、前記多層エピタキシャル構造の厚みが、前記活性領域から放出された光のうち、前記多層エピタキシャル構造の側面を介して抽出される光の量を増大させる働きを持ち、前記基板の、前記多層エピタキシャル構造と結合させる面がテクスチャをつけられた面であり、前記テクスチャ面が、前記テクスチャ面上に突き当たる光のランダム化を促進することを特徴とする方法。 - 前記下部AlGaInN領域を形成するステップが、前記下部AlGaInN領域の厚みが3μmよりも大きくなるように前記下部AlGaInN領域を形成するステップを含むことを特徴とする請求項10に記載の方法。
- 前記下部AlGaInN領域を形成するステップが、前記活性領域及び前記上部AlGaInN領域を後の成長工程で有機金属気相エピタキシャル成長により形成する前に、水素化物気相エピタキシャル成長技術を用いて窒化ガリウムエピタキシャル層を成長させるステップを含むことを特徴とする請求項10又は11に記載の方法。
- 前記多層エピタキシャル構造の成長中に特定の特性を提供する為に前記基板に酸化亜鉛の層を設けるステップを含むことを特徴とする請求項10、11又は12に記載の方法。
- 前記多層エピタキシャル構造の成長中に特定の特性を提供する為に前記基板に二酸化珪素の層を設けるステップを含むことを特徴とする請求項10、11又は12に記載の方法。
- 前記多層エピタキシャル構造の成長中に特定の特性を提供する為に前記基板に誘電体の層を設けるステップを含むことを特徴とする請求項10、11又は12のいずれかに記載の方法。
- 前記下部AlGaInN領域を形成するステップが、n型AlGaInNエピタキシャル層及びドーピングされていないエピタキシャル層を形成するステップを含むことを特徴とする請求項10〜15のいずれかに記載の方法。
- 前記基板の、前記多層エピタキシャル構造と結合させる面に、研磨粒子で機械的にテクスチャをつけるステップを含むことを特徴とする請求項10〜16のいずれかに記載の方法。
- 前記基板の、前記多層エピタキシャル構造と結合させる面に、ウエット又はドライエッチングによりテクスチャをつけるステップを含むことを特徴とする請求項10〜16のいずれかに記載の方法。
- 前記多層エピタキシャル構造の上面にテクスチャをつけるステップを含むことを特徴とする請求項10〜18のいずれかに記載の方法。
- 前記多層エピタキシャル構造が、少なくとも7μmの厚みを持つように構成されたことを特徴とする請求項1〜9のいずれかに記載の素子。
- 前記多層エピタキシャル構造が、少なくとも7μmの厚みを持つように構成されたことを特徴とする請求項10〜19のいずれかに記載の方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US09/328870 | 1999-06-08 | ||
US09/328,870 US6133589A (en) | 1999-06-08 | 1999-06-08 | AlGaInN-based LED having thick epitaxial layer for improved light extraction |
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JP2000168690A Division JP4869470B2 (ja) | 1999-06-08 | 2000-06-06 | エピタキシャル層を有するAlGaInNベースLED |
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JP2011205144A JP2011205144A (ja) | 2011-10-13 |
JP5727320B2 true JP5727320B2 (ja) | 2015-06-03 |
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JP2000168690A Expired - Lifetime JP4869470B2 (ja) | 1999-06-08 | 2000-06-06 | エピタキシャル層を有するAlGaInNベースLED |
JP2011155884A Expired - Lifetime JP5727320B2 (ja) | 1999-06-08 | 2011-07-14 | エピタキシャル層を有するAlGaInNベースLED |
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US (2) | US6133589A (ja) |
JP (2) | JP4869470B2 (ja) |
DE (1) | DE10017757B4 (ja) |
GB (1) | GB2352560A (ja) |
TW (1) | TW579607B (ja) |
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US6133589A (en) | 2000-10-17 |
GB2352560A (en) | 2001-01-31 |
JP2011205144A (ja) | 2011-10-13 |
DE10017757A1 (de) | 2000-12-21 |
JP2001007393A (ja) | 2001-01-12 |
TW579607B (en) | 2004-03-11 |
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