JP2016006896A - 発光ダイオードの製造方法 - Google Patents
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 77
- 239000004065 semiconductor Substances 0.000 claims abstract description 393
- 239000000758 substrate Substances 0.000 claims abstract description 352
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims abstract description 207
- 229910002601 GaN Inorganic materials 0.000 claims abstract description 176
- 238000005530 etching Methods 0.000 claims abstract description 38
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 238000003486 chemical etching Methods 0.000 claims description 8
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- 229910052733 gallium Inorganic materials 0.000 abstract description 12
- 238000000926 separation method Methods 0.000 abstract description 6
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 695
- 229910052751 metal Inorganic materials 0.000 description 64
- 239000002184 metal Substances 0.000 description 64
- 150000001875 compounds Chemical class 0.000 description 27
- 150000004767 nitrides Chemical class 0.000 description 24
- 229920002120 photoresistant polymer Polymers 0.000 description 20
- 239000012535 impurity Substances 0.000 description 16
- 229910052594 sapphire Inorganic materials 0.000 description 16
- 239000010980 sapphire Substances 0.000 description 16
- 239000000945 filler Substances 0.000 description 13
- 230000008569 process Effects 0.000 description 12
- 229910052782 aluminium Inorganic materials 0.000 description 11
- 238000000059 patterning Methods 0.000 description 11
- 230000004888 barrier function Effects 0.000 description 10
- 229910052738 indium Inorganic materials 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 230000010287 polarization Effects 0.000 description 8
- 239000013078 crystal Substances 0.000 description 7
- 239000002356 single layer Substances 0.000 description 7
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 6
- 238000000605 extraction Methods 0.000 description 6
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- 238000001312 dry etching Methods 0.000 description 5
- -1 gallium nitride compound Chemical class 0.000 description 5
- 238000007747 plating Methods 0.000 description 5
- 238000001039 wet etching Methods 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 238000002248 hydride vapour-phase epitaxy Methods 0.000 description 4
- 238000001451 molecular beam epitaxy Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000000151 deposition Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
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- 229910015363 Au—Sn Inorganic materials 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910002704 AlGaN Inorganic materials 0.000 description 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
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- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 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
- H01L33/26—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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Abstract
【解決手段】窒化ガリウム基板11上に第1の窒化ガリウム層13、窒化ガリウム層に比べて狭いバンドギャップを有する犠牲層15、及び第2の窒化ガリウム層17を形成し、第2の窒化ガリウム層及び犠牲層を貫通する溝19を形成し、第2の窒化ガリウム層上に窒化ガリウム系列の各半導体層を成長させることによって半導体積層構造体30を形成し、半導体積層構造体上に支持基板31を形成し、犠牲層をエッチングすることによって半導体積層構造体から窒化ガリウム基板を除去する。溝を用いて犠牲層をエッチングするので、支持基板にダメージを与えずに半導体積層構造体から分離することができる。
【選択図】図5
Description
Claims (22)
- 支持基板と、
前記支持基板上に位置し、窒化ガリウム系列のp型半導体層、窒化ガリウム系列の活性層及び窒化ガリウム系列のn型半導体層を含む半導体積層構造体と、
前記支持基板と前記半導体積層構造体との間で前記p型半導体層にオーミックコンタクトするp電極層と、
前記半導体積層構造体上に位置し、凹凸パターンを有する透明酸化物層と、を含み、
前記半導体積層構造体は、5×106/cm2以下の転位密度を有するように形成された発光ダイオード。 - 前記半導体積層構造体は、窒化ガリウム基板上に成長した各半導体層で形成された、請求項1に記載の発光ダイオード。
- 前記透明酸化物層上に位置し、前記n型半導体層に電気的に接続するn電極パッドをさらに含む、請求項1に記載の発光ダイオード。
- 前記支持基板と前記半導体積層構造体との間に位置し、前記p型半導体層及び前記活性層を貫通する貫通ホールを介して前記n型半導体層に接続されたn電極層と、
前記p電極層と前記n電極層とを絶縁させる絶縁層と、をさらに含む、請求項1に記載の発光ダイオード。 - 前記p電極層に形成されたp電極パッドをさらに含む、請求項4に記載の発光ダイオード。
- 支持基板と、
前記支持基板上に位置し、窒化ガリウム系列のp型半導体層、窒化ガリウム系列の活性層及び窒化ガリウム系列のn型半導体層を含む半導体積層構造体と、
前記支持基板と前記半導体積層構造体との間で前記p型半導体層にオーミックコンタクトするp電極層と、
前記支持基板と前記半導体積層構造体との間に位置し、前記p型半導体層及び前記活性層を貫通する貫通ホールを介して前記n型半導体層に接続されたn電極層と、
前記p電極層と前記n電極層とを絶縁させる絶縁層と、を含み、
前記半導体積層構造体は、5×106/cm2以下の転位密度を有するように形成された発光ダイオード。 - 前記支持基板の下部に位置するボンディングパッドをさらに含む、請求項6に記載の発光ダイオード。
- 前記p電極層上に形成されたp電極パッドをさらに含む、請求項6に記載の発光ダイオード。
- 前記絶縁層は、前記貫通ホール内で前記n電極層を前記p型半導体層及び前記活性層から絶縁させる、請求項6に記載の発光ダイオード。
- 前記半導体積層構造体上に位置し、凹凸パターンを有する透明酸化物層をさらに含む、請求項9に記載の発光ダイオード。
- 窒化ガリウム基板上に第1の窒化ガリウム層、前記窒化ガリウム層に比べて狭いバンドギャップを有する犠牲層及び第2の窒化ガリウム層を形成し、
前記第2の窒化ガリウム層及び前記犠牲層を貫通する溝を形成し、
前記第2の窒化ガリウム層上に窒化ガリウム系列の各半導体層を成長させることによって半導体積層構造体を形成し、
前記半導体積層構造体上に支持基板を形成し、
前記犠牲層をエッチングすることによって前記半導体積層構造体から前記窒化ガリウム基板を除去することを含む発光ダイオードの製造方法。 - 前記犠牲層はInGaNで形成された、請求項11に記載の発光ダイオードの製造方法
。 - 前記犠牲層をエッチングすることは、光強化化学エッチング技術を用いて行われる、請求項11に記載の発光ダイオードの製造方法。
- 前記犠牲層をエッチングすることは、KOHまたはNaOH溶液内で前記窒化ガリウム基板を介して前記犠牲層に光を照射することによって行われる、請求項13に記載の発光ダイオードの製造方法。
- 前記窒化ガリウム基板が除去された後、前記n型半導体層上に凹凸パターンを有する透明酸化物層を形成することをさらに含む、請求項11に記載の発光ダイオードの製造方法。
- 前記支持基板を形成する前に、前記半導体積層構造体にオーミックコンタクトするp型電極層を形成することをさらに含み、
前記半導体積層構造体は、窒化ガリウム系列のn型半導体層、窒化ガリウム系列の活性層及び窒化ガリウム系列のp型半導体層を含み、
前記p電極層は前記p型半導体層にオーミックコンタクトする、請求項11に記載の発光ダイオードの製造方法。 - 前記支持基板を形成する前に、
前記p型半導体層及び前記活性層を貫通する貫通ホールを形成し、
前記貫通ホールの内壁及び前記p電極層を覆う絶縁層を形成し、
前記貫通ホールを介して前記n型半導体層に電気的に接続するn電極層を形成することをさらに含む、請求項16に記載の発光ダイオードの製造方法。 - 前記窒化ガリウム基板を除去した後、前記半導体積層構造体の一部を除去することによって前記p電極層を露出させ、
前記p電極層上にp電極パッドを形成することをさらに含む、請求項17に記載の発光ダイオードの製造方法。 - 前記溝は、メッシュ状に形成された溝、または、ストライプ状に形成された複数の溝を含む、請求項11に記載の発光ダイオードの製造方法。
- 前記支持基板の下部にボンディングパッドを形成することをさらに含む、請求項11に記載の発光ダイオードの製造方法。
- 窒化ガリウム基板上に、窒化ガリウム層、及び前記窒化ガリウム層に比べて狭いバンドギャップを有する窒化ガリウム系半導体で形成された犠牲層を形成し、
前記犠牲層上に窒化ガリウム系列の各半導体層を成長させることによって半導体積層構造体を形成し、
前記半導体積層構造体及び前記犠牲層を貫通する溝を形成し、
前記半導体積層構造体上に支持基板を形成し、
前記犠牲層をエッチングすることによって前記半導体積層構造体から前記窒化ガリウム基板を分離することを含む発光ダイオードの製造方法。 - 支持基板とバルク基板を用意し、
前記支持基板の一側表面上に接合層を形成し、
前記接合層を用いて前記支持基板の一側表面上に前記バルク基板を接合し、
前記バルク基板を前記接合層から一定厚さになるように切断・分離することによってシード層を形成することを含む半導体素子の製造方法。
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2011-0134130 | 2011-12-14 | ||
KR1020110134130A KR20130067515A (ko) | 2011-12-14 | 2011-12-14 | 반도체 소자 제조 방법 |
KR1020110135513A KR101899479B1 (ko) | 2011-12-15 | 2011-12-15 | 반극성 발광 다이오드 및 그것을 제조하는 방법 |
KR10-2011-0135513 | 2011-12-15 | ||
KR10-2012-0026948 | 2012-03-16 | ||
KR1020120026879A KR20130104921A (ko) | 2012-03-16 | 2012-03-16 | 고효율 발광 다이오드 및 그것을 제조하는 방법 |
KR1020120026948A KR101899474B1 (ko) | 2012-03-16 | 2012-03-16 | 고효율 발광 다이오드 제조 방법 |
KR10-2012-0026879 | 2012-03-16 |
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CN104025319B (zh) | 2016-12-14 |
US20140339566A1 (en) | 2014-11-20 |
JP5956604B2 (ja) | 2016-07-27 |
WO2013089459A1 (en) | 2013-06-20 |
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