JP2008010812A - 誘電膜の形成方法、その誘電膜を用いたキャパシタ及びその製造方法 - Google Patents
誘電膜の形成方法、その誘電膜を用いたキャパシタ及びその製造方法 Download PDFInfo
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- JP2008010812A JP2008010812A JP2006350852A JP2006350852A JP2008010812A JP 2008010812 A JP2008010812 A JP 2008010812A JP 2006350852 A JP2006350852 A JP 2006350852A JP 2006350852 A JP2006350852 A JP 2006350852A JP 2008010812 A JP2008010812 A JP 2008010812A
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- oxide film
- dielectric film
- forming
- crystal phase
- zirconium oxide
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- 238000000034 method Methods 0.000 title claims abstract description 80
- 239000003990 capacitor Substances 0.000 title claims abstract description 71
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 229910001936 tantalum oxide Inorganic materials 0.000 claims abstract description 85
- 229910001928 zirconium oxide Inorganic materials 0.000 claims abstract description 81
- 239000013078 crystal Substances 0.000 claims abstract description 78
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 claims abstract description 78
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims abstract description 75
- 238000000151 deposition Methods 0.000 claims abstract description 70
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 claims abstract description 69
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000010030 laminating Methods 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 71
- 238000002347 injection Methods 0.000 claims description 64
- 239000007924 injection Substances 0.000 claims description 64
- 238000010926 purge Methods 0.000 claims description 61
- 239000000376 reactant Substances 0.000 claims description 33
- 238000007740 vapor deposition Methods 0.000 claims description 27
- 230000008021 deposition Effects 0.000 claims description 25
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 21
- 229910052715 tantalum Inorganic materials 0.000 claims description 21
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 21
- 229910052726 zirconium Inorganic materials 0.000 claims description 21
- 239000011261 inert gas Substances 0.000 claims description 10
- 239000002243 precursor Substances 0.000 claims description 10
- 238000012805 post-processing Methods 0.000 claims description 7
- 229910007926 ZrCl Inorganic materials 0.000 claims description 5
- OEIMLTQPLAGXMX-UHFFFAOYSA-I tantalum(v) chloride Chemical compound Cl[Ta](Cl)(Cl)(Cl)Cl OEIMLTQPLAGXMX-UHFFFAOYSA-I 0.000 claims description 5
- 238000011065 in-situ storage Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000006227 byproduct Substances 0.000 description 4
- 229910004542 HfN Inorganic materials 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 229910052741 iridium Inorganic materials 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 229910052707 ruthenium Inorganic materials 0.000 description 3
- 229910052718 tin Inorganic materials 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- QPJSUIGXIBEQAC-UHFFFAOYSA-N n-(2,4-dichloro-5-propan-2-yloxyphenyl)acetamide Chemical compound CC(C)OC1=CC(NC(C)=O)=C(Cl)C=C1Cl QPJSUIGXIBEQAC-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- Semiconductor Integrated Circuits (AREA)
Abstract
【解決手段】キャパシタの誘電膜の形成方法は、下部電極(21)と上部電極(24)上にジルコニウム酸化膜を蒸着するステップと、オゾン処理によってジルコニウム酸化膜の結晶相を正方晶の結晶相に変える後処理ステップと、正方晶の結晶相を有するジルコニウム酸化膜(22A)上に正方晶の結晶相を有するタンタル酸化膜(23)を蒸着するステップとを含み、下部電極(21)及び上部電極(24)の間に共に正方晶の結晶相を有するジルコニウム酸化膜(22A)及びタンタル酸化膜(23)を形成することができ、漏れ電流特性をさらに向上し、かつ、キャパシタンスを大きくする効果がある。
【選択図】図2
Description
22A、33 正方晶の結晶相を有するジルコニウム酸化膜
23、32A 正方晶の結晶相を有するタンタル酸化膜
24、34 上部電極
Claims (37)
- ジルコニウム酸化膜を蒸着する第1ステップと、
前記ジルコニウム酸化膜の結晶相を正方晶の結晶相に変える第2ステップと、
正方晶の結晶相を有する前記ジルコニウム酸化膜上に、正方晶の結晶相を有するタンタル酸化膜を蒸着する第3ステップと
を含むことを特徴とするキャパシタの誘電膜の形成方法。 - 前記第2ステップが、
オゾン処理により、前記ジルコニウム酸化膜の結晶相を正方晶の結晶相に変えるステップであることを特徴とする請求項1に記載のキャパシタの誘電膜の形成方法。 - 前記オゾン処理が、300℃〜500℃の範囲の温度で、180g/m3〜300g/m3の範囲の濃度を有するオゾンを使用して行われる処理であることを特徴とする請求項2に記載のキャパシタの誘電膜の形成方法。
- 前記第1ステップにおける前記ジルコニウム酸化膜の蒸着及び前記第3ステップにおける前記タンタル酸化膜の蒸着が、
単原子蒸着法により行われる蒸着であることを特徴とする請求項1〜3のうちの何れか1項に記載のキャパシタの誘電膜の形成方法。 - 単原子蒸着法による前記ジルコニウム酸化膜の前記蒸着が、
順に行なわれるジルコニウムソースの注入、パージガスの注入、反応剤の注入、及び再度のパージガスの注入で構成される単位サイクルを繰り返し行って、前記ジルコニウム酸化膜を40Å〜100Åの範囲の厚さに形成する蒸着であることを特徴とする請求項4に記載のキャパシタの誘電膜の形成方法。 - 前記ジルコニウムソースが、
Zr[NC2H5CH3]4]、Zr[OC(CH3)2CH2OCH3]4、Zr[OC(CH3)3]4、ZrCl4及びZrI4からなる群の中から選択されるいずれか1つをプレカーサーとして使用して、0.1秒〜10秒間フローされ、
前記パージガスの注入及び前記再度のパージガスの注入において注入されるパージガスが、実質的に同じタイプのガスであることを特徴とする請求項5に記載のキャパシタの誘電膜の形成方法。 - 単原子蒸着法による前記タンタル酸化膜の前記蒸着が、
順に行なわれるタンタルソースの注入、パージガスの注入、反応剤の注入、及び再度のパージガスの注入で構成される単位サイクルを繰り返し行って、前記タンタル酸化膜を20Å〜100Åの範囲の厚さに形成する蒸着であり、
前記パージガスの注入及び前記再度のパージガスの注入において注入されるパージガスが、実質的に同じタイプのガスであることを特徴とする請求項4に記載のキャパシタの誘電膜の形成方法。 - 前記タンタルソースが、
塩化タンタルをプレカーサーとして使用して、0.1秒〜10秒間フローされることを特徴とする請求項7に記載のキャパシタの誘電膜の形成方法。 - 前記反応剤が、O3又はO2プラズマであることを特徴とする請求項5又は7に記載のキャパシタの誘電膜の形成方法。
- 前記パージガスが、不活性ガスであることを特徴とする請求項5又は7に記載のキャパシタの誘電膜の形成方法。
- 前記ジルコニウム酸化膜を蒸着する前記第1ステップ及び前記タンタル酸化膜を蒸着する前記第3ステップが、
13.33Pa〜1333.22Pa(0.1Torr〜10Torr)の範囲の工程圧力及び250〜350℃の範囲の工程温度で行われることを特徴とする請求項1に記載のキャパシタの誘電膜の形成方法。 - 前記第1〜第3ステップが、インサイチューで行われることを特徴とする請求項1に記載のキャパシタの誘電膜の形成方法。
- タンタル酸化膜を蒸着する第1ステップと、
前記タンタル酸化膜の結晶相を正方晶の結晶相に変える第2ステップと、
正方晶の結晶相を有する前記タンタル酸化膜上に、正方晶の結晶相を有するジルコニウム酸化膜を蒸着する第3ステップと
を含むことを特徴とするキャパシタの誘電膜の形成方法。 - 前記第2ステップが、
オゾン処理により、前記タンタル酸化膜の結晶相を正方晶の結晶相に変えるステップであることを特徴とする請求項13に記載のキャパシタの誘電膜の形成方法。 - 前記オゾン処理が、300℃〜500℃の範囲の温度で、180g/m3〜300g/m3の範囲の濃度を有するオゾンを使用して行なわれ処理であることを特徴とする請求項14に記載のキャパシタの誘電膜の形成方法。
- 前記第1ステップにおける前記ジルコニウム酸化膜の蒸着及び前記第3ステップにおける前記タンタル酸化膜の蒸着が、
単原子蒸着法により行われる蒸着であることを特徴とする請求項13〜15のうちの何れか1項に記載のキャパシタの誘電膜の形成方法。 - 単原子蒸着法による前記ジルコニウム酸化膜の前記蒸着が、
順に行なわれるジルコニウムソースの注入、パージガスの注入、反応剤の注入、及び再度のパージガスの注入で構成される単位サイクルを繰り返し行って、前記ジルコニウム酸化膜を40Å〜100Åの範囲の厚さに形成する蒸着であることを特徴とする請求項16に記載のキャパシタの誘電膜の形成方法。 - 前記ジルコニウムソースが、
Zr[NC2H5CH3]4]、Zr[OC(CH3)2CH2OCH3]4、Zr[OC(CH3)3]4、ZrCl4及びZrI4からなる群の中から選択されるいずれか1つをプレカーサーとして使用して、0.1秒〜10秒間フローされることを特徴とする請求項17に記載のキャパシタの誘電膜の形成方法。 - 単原子蒸着法による前記タンタル酸化膜の前記蒸着が、
順に行なわれるタンタルソースの注入、パージガスの注入、反応剤の注入、及び再度のパージガスの注入で構成される単位サイクルを繰り返し行って、前記タンタル酸化膜を20Å〜100Åの範囲の厚さに形成する蒸着であることを特徴とする請求項16に記載のキャパシタの誘電膜の形成方法。 - 前記タンタルソースが、
塩化タンタルをプレカーサーとして使用して、0.1秒〜10秒間フローされることを特徴とする請求項19に記載のキャパシタの誘電膜の形成方法。 - 前記反応剤が、O3又はO2プラズマであることを特徴とする請求項17又は19に記載のキャパシタの誘電膜の形成方法。
- 前記パージガスが、不活性ガスであることを特徴とする請求項17又は19に記載のキャパシタの誘電膜の形成方法。
- 前記ジルコニウム酸化膜を蒸着する前記第1ステップ及び前記タンタル酸化膜を蒸着する前記第3ステップが、
13.33Pa〜1333.22Pa(0.1Torr〜10Torr)の範囲の工程圧力及び250〜350℃の範囲の工程温度で行われることを特徴とする請求項17又は19に記載のキャパシタの誘電膜の形成方法。 - 前記第1〜第3ステップが、インサイチューで行われることを特徴とする請求項13に記載のキャパシタの誘電膜の形成方法。
- 下部電極を形成する第1ステップと、
前記下部電極上に、正方晶の結晶相を有するジルコニウム酸化膜及び正方晶の結晶相を有するタンタル酸化膜を積層して誘電膜を形成する第2ステップと、
前記誘電膜上に上部電極を形成する第3ステップと
を含むことを特徴とするキャパシタの製造方法。 - 前記誘電膜を形成する前記第2ステップが、
前記下部電極上にジルコニウム酸化膜を蒸着するステップと、
前記ジルコニウム酸化膜の結晶相を正方晶の結晶相に変える後処理ステップと、
正方晶の結晶相を有する前記ジルコニウム酸化膜上に、正方晶の結晶相を有するタンタル酸化膜を蒸着するステップと
を含むことを特徴とする請求項25に記載のキャパシタの製造方法。 - 前記誘電膜を形成する前記第2ステップが、
前記下部電極上にタンタル酸化膜を蒸着するステップと、
前記タンタル酸化膜の結晶相を正方晶の結晶相に変える後処理ステップと、
正方晶の結晶相を有する前記タンタル酸化膜上に、正方晶の結晶相を有するジルコニウム酸化膜を蒸着するステップと
を含むことを特徴とする請求項25に記載のキャパシタの製造方法。 - 正方晶の結晶相に変える前記後処理ステップが、
オゾン処理により行われるステップであることを特徴とする請求項26又は27に記載のキャパシタの製造方法。 - 前記オゾン処理が、300℃〜500℃の範囲の温度で、180g/m3〜300g/m3の範囲の濃度を有するオゾンを使用して行われる処理であることを特徴とする請求項28に記載のキャパシタの製造方法。
- 前記ジルコニウム酸化膜を蒸着する前記ステップ及び前記タンタル酸化膜を蒸着する前記ステップにおける蒸着が、
単原子蒸着法により行われる蒸着であることを特徴とする請求項26又は27に記載のキャパシタの製造方法。 - 単原子蒸着法による前記ジルコニウム酸化膜の前記蒸着が、
順に行なわれるジルコニウムソースの注入、パージガスの注入、反応剤の注入、及び再度のパージガスの注入で構成される単位サイクルを繰り返し行って、前記ジルコニウム酸化膜を40Å〜100Åの範囲の厚さに形成する蒸着であることを特徴とする請求項30に記載のキャパシタの製造方法。 - 前記ジルコニウムソースが、
Zr[NC2H5CH3]4]、Zr[OC(CH3)2CH2OCH3]4、Zr[OC(CH3)3]4、ZrCl4及びZrI4からなる群の中から選択されるいずれか1つをプレカーサーとして使用して、0.1秒〜10秒間フローされることを特徴とする請求項31に記載のキャパシタの製造方法。 - 単原子蒸着法による前記タンタル酸化膜の前記蒸着が、
順に行なわれるタンタルソースの注入、パージガスの注入、反応剤の注入、及び再度のパージガスの注入で構成される単位サイクルを繰り返し行って、前記タンタル酸化膜を20Å〜100Åの範囲の厚さに形成する蒸着であることを特徴とする請求項30に記載のキャパシタの製造方法。 - 前記タンタルソースが、
塩化タンタルをプレカーサーとして使用して、0.1秒〜10秒間フローされることを特徴とする請求項33に記載のキャパシタの製造方法。 - 前記ジルコニウム酸化膜を蒸着する前記ステップ及び前記タンタル酸化膜を蒸着する前記ステップが、
13.33Pa〜1333.22Pa(0.1Torr〜10Torr)の範囲の工程圧力及び250〜350℃の範囲の工程温度で行われることを特徴とする請求項30に記載のキャパシタの製造方法。 - 前記ジルコニウム酸化膜を蒸着する前記ステップ、前記後処理ステップ、及び前記タンタル酸化膜を蒸着する前記ステップが、インサイチューで行われることを特徴とする請求項26又は27に記載のキャパシタの製造方法。
- 下部電極と、
該下部電極上に形成され、正方晶の結晶相を有するジルコニウム酸化膜及び正方晶の結晶相を有するタンタル酸化膜を有する誘電膜と、
該誘電膜上に形成される上部電極と
を備えることを特徴とするキャパシタ。
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- 2006-12-28 US US11/617,588 patent/US7735206B2/en not_active Expired - Fee Related
- 2006-12-31 CN CNB2006101564350A patent/CN100550317C/zh not_active Expired - Fee Related
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2010
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WO2010082605A1 (ja) * | 2009-01-15 | 2010-07-22 | 東京エレクトロン株式会社 | キャパシタ及びキャパシタの製造方法 |
JP2022509833A (ja) * | 2018-11-29 | 2022-01-24 | エイブイエックス コーポレイション | 順次蒸着誘電体膜を含む固体電解キャパシタ |
JP7167344B2 (ja) | 2018-11-29 | 2022-11-08 | キョーセラ・エイブイエックス・コンポーネンツ・コーポレーション | 順次蒸着誘電体膜を含む固体電解キャパシタ |
Also Published As
Publication number | Publication date |
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KR100716655B1 (ko) | 2007-05-09 |
US20100255217A1 (en) | 2010-10-07 |
US7735206B2 (en) | 2010-06-15 |
US20080002330A1 (en) | 2008-01-03 |
CN101097862A (zh) | 2008-01-02 |
US20130058007A1 (en) | 2013-03-07 |
CN100550317C (zh) | 2009-10-14 |
JP4814781B2 (ja) | 2011-11-16 |
US8256077B2 (en) | 2012-09-04 |
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