JP5179087B2 - 発光素子 - Google Patents
発光素子 Download PDFInfo
- Publication number
- JP5179087B2 JP5179087B2 JP2007123894A JP2007123894A JP5179087B2 JP 5179087 B2 JP5179087 B2 JP 5179087B2 JP 2007123894 A JP2007123894 A JP 2007123894A JP 2007123894 A JP2007123894 A JP 2007123894A JP 5179087 B2 JP5179087 B2 JP 5179087B2
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- JP
- Japan
- Prior art keywords
- layer
- light emitting
- light
- photonic crystal
- semiconductor layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000605 extraction Methods 0.000 claims description 205
- 239000004065 semiconductor Substances 0.000 claims description 203
- 239000000758 substrate Substances 0.000 claims description 45
- 239000000463 material Substances 0.000 claims description 30
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 5
- 239000011787 zinc oxide Substances 0.000 claims description 5
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 4
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 4
- 150000004767 nitrides Chemical class 0.000 claims description 4
- PNHVEGMHOXTHMW-UHFFFAOYSA-N magnesium;zinc;oxygen(2-) Chemical compound [O-2].[O-2].[Mg+2].[Zn+2] PNHVEGMHOXTHMW-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims 1
- JYMITAMFTJDTAE-UHFFFAOYSA-N aluminum zinc oxygen(2-) Chemical compound [O-2].[Al+3].[Zn+2] JYMITAMFTJDTAE-UHFFFAOYSA-N 0.000 claims 1
- AJNVQOSZGJRYEI-UHFFFAOYSA-N digallium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Ga+3] AJNVQOSZGJRYEI-UHFFFAOYSA-N 0.000 claims 1
- 229910001195 gallium oxide Inorganic materials 0.000 claims 1
- 229910052725 zinc Inorganic materials 0.000 claims 1
- 239000011701 zinc Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 426
- 239000004038 photonic crystal Substances 0.000 description 257
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 107
- 229910002601 GaN Inorganic materials 0.000 description 103
- 238000005530 etching Methods 0.000 description 99
- 238000000034 method Methods 0.000 description 88
- 230000000694 effects Effects 0.000 description 46
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- 239000002184 metal Substances 0.000 description 24
- 230000005855 radiation Effects 0.000 description 22
- 230000008859 change Effects 0.000 description 20
- 230000006872 improvement Effects 0.000 description 17
- 229910052594 sapphire Inorganic materials 0.000 description 16
- 239000010980 sapphire Substances 0.000 description 16
- 230000001965 increasing effect Effects 0.000 description 15
- 230000003014 reinforcing effect Effects 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 12
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- 238000004364 calculation method Methods 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 8
- 230000007423 decrease Effects 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 8
- 239000011651 chromium Substances 0.000 description 7
- 238000005094 computer simulation Methods 0.000 description 7
- 238000001312 dry etching Methods 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 6
- 239000004593 Epoxy Substances 0.000 description 6
- 229910052804 chromium Inorganic materials 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
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- 230000008901 benefit Effects 0.000 description 5
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- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- JAONJTDQXUSBGG-UHFFFAOYSA-N dialuminum;dizinc;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Al+3].[Zn+2].[Zn+2] JAONJTDQXUSBGG-UHFFFAOYSA-N 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 238000000635 electron micrograph Methods 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 229960001296 zinc oxide Drugs 0.000 description 4
- 239000010949 copper Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000003989 dielectric material Substances 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
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- 238000000059 patterning Methods 0.000 description 3
- 238000001039 wet etching Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
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- 239000000945 filler Substances 0.000 description 2
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- 238000004626 scanning electron microscopy Methods 0.000 description 2
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- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
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- 239000012780 transparent material Substances 0.000 description 2
- 238000005019 vapor deposition process Methods 0.000 description 2
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 2
- 229910002704 AlGaN Inorganic materials 0.000 description 1
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 1
- -1 Gallium nitride compound Chemical class 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
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- 239000000470 constituent Substances 0.000 description 1
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- 230000000593 degrading effect Effects 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000000609 electron-beam lithography Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005290 field theory Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001127 nanoimprint lithography Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
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- 238000007747 plating Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- 230000002040 relaxant effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
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- 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
- H01L33/20—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 particular shape, e.g. curved or truncated substrate
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- H—ELECTRICITY
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- H01L33/36—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 electrodes
- H01L33/40—Materials therefor
- H01L33/405—Reflective materials
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- H01L33/36—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 electrodes
- H01L33/40—Materials therefor
- H01L33/42—Transparent materials
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- H01L33/48—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 body packages
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- H01L33/58—Optical field-shaping elements
- H01L33/60—Reflective elements
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- H01L33/48—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 body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
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- H01L2224/42—Wire connectors; Manufacturing methods related thereto
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- H01L2224/4805—Shape
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- H01L2224/48091—Arched
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- H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
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- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
- H01L2224/48257—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a die pad of the item
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- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/484—Connecting portions
- H01L2224/48463—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond
- H01L2224/48465—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond the other connecting portion not on the bonding area being a wedge bond, i.e. ball-to-wedge, regular stitch
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- H01L2224/732—Location after the connecting process
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- H01L2933/0083—Periodic patterns for optical field-shaping in or on the semiconductor body or semiconductor body package, e.g. photonic bandgap structures
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- H01L33/0093—Wafer bonding; Removal of the growth substrate
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- 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
- H01L33/20—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 particular shape, e.g. curved or truncated substrate
- H01L33/22—Roughened surfaces, e.g. at the interface between epitaxial layers
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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
- H01L33/44—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 coatings, e.g. passivation layer or anti-reflective coating
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S438/00—Semiconductor device manufacturing: process
- Y10S438/977—Thinning or removal of substrate
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Led Devices (AREA)
- Semiconductor Lasers (AREA)
Description
20 GaN半導体層
21 p-型GaN半導体層
22 発光層
23 n-型GaN半導体層
24 バッファ層
30 透明電極層
40 光結晶
Claims (15)
- 基板と、
前記基板上に位置し、第1型半導体層と、前記第1型半導体層の上に位置する活性層と、前記活性層の上に位置する第2型半導体層とを含む半導体層と、
前記第1型半導体層に電気的に接続される第1電極と、
前記第2型半導体層に電気的に接続される第2電極と、
前記半導体層上に位置し、前記半導体層と同一の屈折率または前記半導体層より大きい屈折率の物質を含み、酸化物または窒化物を含み、λ/4n(ここで、λは、前記発光素子から発光される光の波長で、nは、前記光抽出層の屈折率である。)以上、又は150nm以上の厚さを有する光抽出層と、を含み、
前記光抽出層には、複数のホールが形成されており、前記複数のホールには、透明伝導性物質が位置することを特徴とする発光素子。 - 前記ホールは、規則的に配置されたことを特徴とする請求項1に記載の発光素子。
- 前記ホール間の周期は、200nm〜5000nmであることを特徴とする請求項2に記載の発光素子。
- 規則的に配置された前記ホールの周期をaとすると、前記ホールの半径は0.1a〜0.45aであることを特徴とする請求項2に記載の発光素子。
- 発光素子から発光される光の波長をλ、前記光抽出層の屈折率をnとすると、前記ホールの深さは、0.25λ/n〜10λ/nであることを特徴とする請求項1に記載の発光素子。
- 前記光抽出層の光抽出効率が飽和するように、前記ホールの深さが設定されることを特徴とする請求項5に記載の発光素子。
- 前記光抽出層は、屈折率が2.4以上であることを特徴とする請求項1に記載の発光素子。
- 前記光抽出層は、屈折率が2.6よりも大きいことを特徴とする請求項1に記載の発光素子。
- 前記光抽出層は、Si3NまたはTiO2で形成されたことを特徴とする請求項1に記載の発光素子。
- 前記第2型半導体層の厚さは、30nm〜500nmであることを特徴とする請求項1に記載の発光素子。
- 前記光抽出層は、粗面形成されていることを特徴とする請求項1に記載の発光素子。
- 前記透明伝導性物質は、透明伝導性酸化物を含むことを特徴とする請求項1に記載の発光素子。
- 前記透明伝導性物質は、酸化インジウムスズ(ITO)、酸化亜鉛(IZO)、酸化亜鉛アルミニウム(AZO)、酸化亜鉛マグネシウム(MZO)、または、酸化亜鉛ガリウム(GZO)を含むことを特徴とする請求項1に記載の発光素子。
- 前記光抽出層は、前記半導体層と接触することを特徴とする請求項1に記載の発光素子。
- 前記透明伝導性物質は、前記第2電極に電気的に接続されていることを特徴とする請求項1に記載の発光素子。
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