JP2005217406A - 電流拡散層を含む半導体発光装置 - Google Patents
電流拡散層を含む半導体発光装置 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 13
- 238000009792 diffusion process Methods 0.000 title abstract description 4
- 238000005253 cladding Methods 0.000 claims description 21
- 239000002019 doping agent Substances 0.000 claims description 8
- 150000004767 nitrides Chemical class 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 103
- 238000003892 spreading Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000010931 gold Substances 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 229910002059 quaternary alloy Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910017401 Au—Ge Inorganic materials 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 229910002056 binary alloy Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 229910052733 gallium Inorganic materials 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052752 metalloid Inorganic materials 0.000 description 2
- 150000002738 metalloids Chemical class 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 229910002058 ternary alloy Inorganic materials 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000001451 molecular beam epitaxy Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000005036 potential barrier Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000001429 visible spectrum Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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- H01L33/00—Semiconductor devices having potential barriers 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 having potential barriers 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
- H01L33/14—Semiconductor devices having potential barriers 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 carrier transport control structure, e.g. highly-doped semiconductor layer or current-blocking structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers 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 having potential barriers 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 Table
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers 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 having potential barriers 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 having potential barriers 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 having potential barriers 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 Table
- H01L33/32—Materials of the light emitting region containing only elements of Group III and Group V of the Periodic Table containing nitrogen
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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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- Y10S257/00—Active solid-state devices, e.g. transistors, solid-state diodes
- Y10S257/918—Light emitting regenerative switching device, e.g. light emitting scr arrays, circuitry
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Abstract
【解決手段】 p型領域とn型領域の間に配置された発光領域を含むIII族窒化物又はIII族燐化物発光装置。少なくとも1つの高濃度ドープ層が、電流拡散をもたらすためにn型領域又はp型領域のいずれか又はその両方の中に配置される。
【選択図】 図1A
Description
本発明の実施形態によれば、III族燐化物フリップチップ装置は、1つ又はそれ以上の高濃度ドープ層を含む。高濃度ドープ層は、装置のエピタキシャル層の厚みを増大することなく、装置内で電流を横方向に拡散させる。図1Aは、III族燐化物フリップチップLEDの断面図である。図1Aの装置は、pドープクラッド領域5とnドープクラッド領域7の間に挟まれた活性領域6を含む。活性領域によって発する光の波長は、当業技術で公知のように、活性領域6内の層の幅及び組成を選択することによって制御することができる。適切な活性領域の例は、障壁層によって分離された3つ又は4つの量子井戸を含む。n接点層8は、n接点10をnドープクラッド領域7から分離する。p接点9は、pドープ電流拡散層3上に形成される。光は、非ドープ透明GaPウィンドウ層1を通じて装置から抽出される。下表は、層3、5、6、7、及び8の各々に対して適切な厚み、組成、及びドーパントの例を与える。
図1Aで説明した実施形態のように、図3に示す装置においては、高濃度ドープ層4は、pドープ接点層3、pドープクラッド領域5、nドープクラッド領域7、及びnドープ接点層8のうちの1つ又はそれ以上の中に形成することができる。図3に示す装置において、p接点は、通常は、活性領域6のp型側に十分な電流拡散をもたらすシート接点である。従って、III族窒化物装置においては、高濃度ドープ層4は、多くの場合に活性領域6のn型側のみに形成される。図3の高濃度ドープ層4は、GaN層又は四元AlInGaN層とすることができ、又は、高濃度ドープ層が位置する領域と同じ組成の層であってもよい。高濃度ドープ層は、図1Aに付随した文章で上述したものと同じ厚み、活性領域に対する位置、及びドーパント濃度を有することができる。
本発明を詳細に説明したが、当業者は、本発明の開示により、本明細書で説明した発明の精神から逸脱することなく本発明に対する変更を為し得ることを認めるであろう。従って、本発明の範囲が図示及び説明した特定の実施形態に限定されることは意図していない。
3 pドープ電流拡散層
4 高濃度ドープ層
5 pドープクラッド領域
6 活性領域
7 nドープクラッド領域
8 n接点層
9 p接点
10 n接点
Claims (19)
- 第1の導電型の領域と第2の導電型の領域の間に配置された発光領域と、
前記第1の導電型の領域内に配置された少なくとも1つの高濃度ドープ層と、
を含み、
前記高濃度ドープ層は、前記第1の導電型の領域よりも高濃度にドープされる、
ことを特徴とする半導体発光装置。 - 前記発光領域は、少なくとも1つのInGaP層を含むことを特徴とする請求項1に記載の装置。
- 前記発光領域は、少なくとも1つのInGaN層を含むことを特徴とする請求項1に記載の装置。
- 前記第1の導電型の領域内に配置された複数の高濃度ドープ層を更に含むことを特徴とする請求項1に記載の装置。
- 前記複数の高濃度ドープ層の各々は、約10nmと約100nmの間の厚みを有し、
前記複数の高濃度ドープ層は、第1の導電型の領域から少なくとも10nmだけ離される、
ことを特徴とする請求項4に記載の装置。 - 前記複数の高濃度ドープ層の全厚は、約100nmと約500nmの間であることを特徴とする請求項4に記載の装置。
- 前記第1の導電型の領域は、約5x1017と約1x1018cm-3の間のドーパント濃度を有し、
前記高濃度ドープ層は、約1x1018と約1x1019cm-3の間のドーパント濃度を有する、
ことを特徴とする請求項1に記載の装置。 - 前記高濃度ドープ層は、0<x≦1として(AlxGa1-x)0.5In0.5Pを含むことを特徴とする請求項1に記載の装置。
- 前記高濃度ドープ層は、0.2<x<0.7として(AlxGa1-x)0.5In0.5Pを含むことを特徴とする請求項8に記載の装置。
- 前記高濃度ドープ層は、(Al0.65Ga0.35)0.5In0.5Pを含むことを特徴とする請求項8に記載の装置。
- 前記高濃度ドープ層は、0<x≦1、0<y≦1、及び0<z≦1としてAlxInyGazNを含むことを特徴とする請求項1に記載の装置。
- 前記高濃度ドープ層は、GaNを含むことを特徴とする請求項1に記載の装置。
- 前記高濃度ドープ層は、第1の高濃度ドープ層であり、
前記第2の導電型の領域内に配置され、該第2の導電型の領域よりも高濃度にドープされた第2の高濃度ドープ層、
を更に含むことを特徴とする請求項1に記載の装置。 - 前記第1の導電型の領域及び前記第2の導電型の領域は、活性領域に隣接したクラッド層であり、
前記第1の導電型のクラッド層の、前記活性領域から反対側の表面に隣接した第1の導電型の接触領域と、
前記第2の導電型のクラッド層の、前記活性領域から反対側の表面に隣接した第2の導電型の接触領域と、
を更に含むことを特徴とする請求項1に記載の装置。 - 前記高濃度ドープ層は、前記第1の導電型のクラッド層内に配置された第1の高濃度ドープ層であり、
前記第1の導電型の接触領域内に配置され、該第1の導電型の接触領域よりも高濃度にドープされた第2の高濃度ドープ層、
を更に含むことを特徴とする請求項14に記載の装置。 - 前記高濃度ドープ層は、前記第1の導電型のクラッド層内に配置された第1の高濃度ドープ層であり、
前記第2の導電型の接触領域内に配置され、該第2の導電型の接触領域よりも高濃度にドープされた第2の高濃度ドープ層、
を更に含むことを特徴とする請求項14に記載の装置。 - 前記第1の導電型の領域及び前記第2の導電型の領域は、接触領域であり、
前記第1の導電型の接触領域は、第1の導電型のクラッド領域によって前記活性領域から間隔を空けて配置され、
前記第2の導電型の接触領域は、第2の導電型のクラッド領域によって前記活性領域から間隔を空けて配置される、
ことを特徴とする請求項1に記載の装置。 - 前記高濃度ドープ層は、前記第1の導電型の接触領域内に配置された第1の高濃度ドープ層であり、
前記第2の導電型の接触領域内に配置され、該第2の導電型の接触領域よりも高濃度にドープされた第2の高濃度ドープ層、
を更に含むことを特徴とする請求項17に記載の装置。 - 前記第1の導電型の領域に電気的に結合した第1のリードと、
前記第2の導電型の領域に電気的に結合した第2のリードと、
前記活性領域の上に配置されたカバーと、
を更に含むことを特徴とする請求項1に記載の装置。
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US10/766,277 US7026653B2 (en) | 2004-01-27 | 2004-01-27 | Semiconductor light emitting devices including current spreading layers |
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EP (1) | EP1560275B1 (ja) |
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Also Published As
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US20050161679A1 (en) | 2005-07-28 |
EP1560275A2 (en) | 2005-08-03 |
EP1560275B1 (en) | 2019-03-13 |
TWI430468B (zh) | 2014-03-11 |
US7026653B2 (en) | 2006-04-11 |
EP1560275A3 (en) | 2014-02-26 |
TW200537711A (en) | 2005-11-16 |
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