JP2016036037A - 発光素子 - Google Patents
発光素子 Download PDFInfo
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- JP2016036037A JP2016036037A JP2015197953A JP2015197953A JP2016036037A JP 2016036037 A JP2016036037 A JP 2016036037A JP 2015197953 A JP2015197953 A JP 2015197953A JP 2015197953 A JP2015197953 A JP 2015197953A JP 2016036037 A JP2016036037 A JP 2016036037A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/81—Bodies
- H10H20/819—Bodies characterised by their shape, e.g. curved or truncated substrates
- H10H20/82—Roughened surfaces, e.g. at the interface between epitaxial layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/81—Bodies
- H10H20/822—Materials of the light-emitting regions
- H10H20/824—Materials of the light-emitting regions comprising only Group III-V materials, e.g. GaP
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/81—Bodies
- H10H20/822—Materials of the light-emitting regions
- H10H20/824—Materials of the light-emitting regions comprising only Group III-V materials, e.g. GaP
- H10H20/825—Materials of the light-emitting regions comprising only Group III-V materials, e.g. GaP containing nitrogen, e.g. GaN
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/83—Electrodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/83—Electrodes
- H10H20/831—Electrodes characterised by their shape
- H10H20/8312—Electrodes characterised by their shape extending at least partially through the bodies
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/855—Optical field-shaping means, e.g. lenses
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/81—Bodies
- H10H20/814—Bodies having reflecting means, e.g. semiconductor Bragg reflectors
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Abstract
Description
したがって、図面及び説明は本質的に例示的なものと見なされるべきであり、限定的なものと見なされるべきではない。
場合によっては、層はエピタキシャル層又は複数のエピタキシャル層群を含む。層は膜又は薄膜を含んでもよい。状況によっては、層は、例えば、光を発生する(又は放射する)ように構成された活性層等の、所定の素子機能を果たす素子(例えば、発光ダイオード)の構造構成要素である。一般的に、層は、約1単原子単層(ML:monolayer)から数十単層、数百単層、数千単層、数百万単層、数十億単層、数兆単層、又はそれ以上の厚さを有する。一例では、層は、1単原子単層よりも大きい厚さを有する多層構造である。加えて、層は複数の材料層(又はサブレイヤー)を含んでよい。一例では、多重量子井戸活性層が複数の井戸及びバリア層を含む。層は複数のサブレイヤーを含んでよい。例えば、活性層がバリアサブレイヤー及び井戸サブレイヤーを含んでよい。
本発明の一態様では、発光素子が、基板と、基板に隣接するp形半導体層と、p形半導体層に隣接する活性層と、活性層に隣接するn形半導体層と、を含む。発光素子は、n形又はp形半導体層に隣接する光結合構造を含む。実施形態によっては、光結合構造のせいぜい一部はn形又はp形半導体層から形成される。
[光結合層の形成方法]
本発明の別の態様では、発光素子形成システムが、基板を保持するための反応チャンバと、この反応チャンバと流体結合し、反応チャンバをパージ又は排気するように構成されるポンプシステムと、発光素子形成方法を実装する機械可読コードを実行するためのプロセッサを有するコンピュータシステムと、を含む。コードは、本明細書において提供される方法のいずれを実装してもよい。一実施形態では、コードは、反応チャンバ内に、1つ以上のIII−V族半導体材料を含む光結合層(又は構造)が上に配置される基板を提供することと、光結合層の一部の上に、光結合層に隣接するn形半導体層及びp形半導体層のうちの一方と電気的に導通した電極を形成することと、を含む方法を実装する。別の実施形態では、コードは、反応チャンバ内に、バッファ層を有する基板を提供することと、光結合層を形成するためにバッファ層を粗面化することと、を含む方法を実装する。
Claims (21)
- 半導体層と、
前記半導体層上の光結合層と、
前記半導体層上の電極と、
を備え、
前記光結合層は、
第1屈折率を有する第1層と、
第2屈折率を有する第2層と、
前記第1層および前記第2層の少なくとも一方に設けられた光結合部と、
を有し、
前記第1層は、n形III−V族半導体層であり、
前記第2層は、粗面化されたアンドープIII−V族半導体層および粗面化されたバッファ層の少なくともいずれか一方である発光素子。 - 前記電極は、前記光結合層に設けられた窪み中に位置する請求項1記載の発光素子。
- 前記光結合層の窪みの底面は、1ナノメートルと500ナノメートルとの間もしくは10ナノメートルと100ナノメートルとの間の波形を有する請求項2記載の発光素子。
- 前記光結合層の窪みの底面は、0.5マイクロメートル、0.1マイクロメートルもしくは0.001マイクロメートルよりも小さい波形を有する請求項2記載の発光素子。
- 前記光結合層は、波形を含み、
前記光結合層の窪みの底面は、前記光結合層の波形よりも小さい波形を有する請求項2記載の発光素子。 - 前記半導体層は、n形半導体層、p形半導体層、III−V族半導体層またはn形窒化ガリウム層である請求項1〜5のいずれか1つに記載の発光素子。
- 前記第2層は、粗面化されたアンドープIII−V族半導体層である請求項1〜6のいずれか1つに記載の発光素子。
- 前記第2層は、粗面化されたバッファ層である請求項1〜7のいずれか1つに記載の発光素子。
- 前記光結合層は、前記第2層に隣接した第3層をさらに有する請求項1〜8のいずれか1つに記載の発光素子。
- 前記第3層は、III−V族半導体層、アルミニウムを含むIII−V族半導体層、窒化アルミニウムガリウム層または窒化アルミニウム層を含む請求項9記載の発光素子。
- 前記電極は、チタニウム、アルミニウム、ニッケル、白金、金、銀、ロジウム、銅およびクロムのうちの少なくとも1つを含む請求項1〜10のいずれか1つに記載の発光素子。
- 前記光結合層は、少なくとも第4層をさらに含む請求項1〜11のいずれか1つに記載の発光素子。
- 前記光結合部は、三角の断面、四角の断面または長方形の断面を有する請求項1〜12のいずれか1つに記載の発光素子。
- 前記光結合部は、円錐状、角錐状もしくは柱状の複数の部分を含む請求項1〜12のいずれか1つに記載の発光素子。
- 前記半導体層の下に位置する活性層をさらに備えた請求項1〜14のいずれか1つに記載の発光素子。
- 前記活性層の下に別の半導体層をさらに備えた請求項15記載の発光素子。
- 前記光結合層は、10ナノメートルと3マイクロメートルとの間、100ナノメートルと2マイクロメートルとの間もしくは200ナノメートルと1.5マイクロメートルとの間の波形を有する請求項1〜16のいずれか1つに記載の発光素子。
- 前記光結合層は、0.5マイクロメートルよりも小さい波形を有する請求項1〜17のいずれか1つに記載の発光素子。
- 前記電極と前記半導体層との間のコンタクトは、オーミックコンタクトである請求項1〜18のいずれか1つに記載の発光素子。
- 前記第1層は、前記第2層よりも前記半導体層に近接し、
前記第2屈折率は、前記第1屈折率よりも小さい請求項1〜19のいずれか1つに記載の発光素子。 - 前記第2層は、前記第1層を覆う請求項1〜20のいずれか1つに記載の発光素子。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/249,196 | 2011-09-29 | ||
| US13/249,196 US8664679B2 (en) | 2011-09-29 | 2011-09-29 | Light emitting devices having light coupling layers with recessed electrodes |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014527369A Division JP2014529190A (ja) | 2011-09-29 | 2012-09-27 | 埋め込み電極を有する光結合層を有する発光素子 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2016036037A true JP2016036037A (ja) | 2016-03-17 |
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ID=47991743
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014527369A Pending JP2014529190A (ja) | 2011-09-29 | 2012-09-27 | 埋め込み電極を有する光結合層を有する発光素子 |
| JP2015197953A Pending JP2016036037A (ja) | 2011-09-29 | 2015-10-05 | 発光素子 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014527369A Pending JP2014529190A (ja) | 2011-09-29 | 2012-09-27 | 埋め込み電極を有する光結合層を有する発光素子 |
Country Status (6)
| Country | Link |
|---|---|
| US (3) | US8664679B2 (ja) |
| JP (2) | JP2014529190A (ja) |
| KR (1) | KR20140030235A (ja) |
| CN (1) | CN103765613A (ja) |
| TW (1) | TW201332148A (ja) |
| WO (1) | WO2013049421A2 (ja) |
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2012
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- 2012-09-27 WO PCT/US2012/057669 patent/WO2013049421A2/en not_active Ceased
- 2012-09-27 KR KR1020137032159A patent/KR20140030235A/ko not_active Ceased
- 2012-09-27 JP JP2014527369A patent/JP2014529190A/ja active Pending
- 2012-09-28 TW TW101135821A patent/TW201332148A/zh unknown
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2014
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|---|---|
| JP2014529190A (ja) | 2014-10-30 |
| WO2013049421A3 (en) | 2013-07-11 |
| US8664679B2 (en) | 2014-03-04 |
| US20140332838A1 (en) | 2014-11-13 |
| KR20140030235A (ko) | 2014-03-11 |
| WO2013049421A2 (en) | 2013-04-04 |
| US8822243B2 (en) | 2014-09-02 |
| CN103765613A (zh) | 2014-04-30 |
| US20130082290A1 (en) | 2013-04-04 |
| US20140127841A1 (en) | 2014-05-08 |
| TW201332148A (zh) | 2013-08-01 |
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