JP2010006696A - 導体または半導体基板上に堆積させたカーボンナノチューブマットの製造方法 - Google Patents
導体または半導体基板上に堆積させたカーボンナノチューブマットの製造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000002041 carbon nanotube Substances 0.000 title claims abstract description 29
- 229910021393 carbon nanotube Inorganic materials 0.000 title claims abstract description 27
- 239000004020 conductor Substances 0.000 title claims abstract description 14
- 239000004065 semiconductor Substances 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 title abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 43
- 239000002184 metal Substances 0.000 claims abstract description 43
- 229910021417 amorphous silicon Inorganic materials 0.000 claims abstract description 29
- 239000003054 catalyst Substances 0.000 claims abstract description 29
- 230000004888 barrier function Effects 0.000 claims abstract description 15
- 238000009792 diffusion process Methods 0.000 claims abstract description 14
- 230000001590 oxidative effect Effects 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 44
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 34
- 230000003647 oxidation Effects 0.000 claims description 30
- 238000007254 oxidation reaction Methods 0.000 claims description 30
- 239000000758 substrate Substances 0.000 claims description 27
- 238000000151 deposition Methods 0.000 claims description 20
- 238000005530 etching Methods 0.000 claims description 17
- 229910052742 iron Inorganic materials 0.000 claims description 17
- 239000002131 composite material Substances 0.000 claims description 16
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 8
- 238000001659 ion-beam spectroscopy Methods 0.000 claims description 5
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 239000002071 nanotube Substances 0.000 description 27
- 210000002381 plasma Anatomy 0.000 description 22
- 230000008569 process Effects 0.000 description 11
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 10
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 5
- 238000009832 plasma treatment Methods 0.000 description 4
- 239000002109 single walled nanotube Substances 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- YZCKVEUIGOORGS-IGMARMGPSA-N Protium Chemical compound [1H] YZCKVEUIGOORGS-IGMARMGPSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 238000005566 electron beam evaporation Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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Abstract
【解決手段】拡散バリア520、拡散バリア上にアモルファスシリコン層530、アモルファスシリコン層上に金属層を含む触媒複合体を導体または半導体基板510上に堆積させる。次いで前記金属層に酸化処理を行い、最後に、酸化処理された金属層からカーボンナノチューブマット580を成長させる。
【選択図】図5H−1
Description
少なくとも1層以上の金属層を含んでなる触媒複合体を、前記基板上に堆積させる工程、
前記金属層の酸化処理を行う工程、および
前記酸化処理された金属層からカーボンナノチューブを成長させる工程、
を含んでなる方法により規定されるものである。
前記第一導電層上に拡散バリアを堆積させる工程、
第一アモルファスシリコン層と前記拡散バリア上に堆積した金属層とを含んでなる触媒複合体を、ビアホールの底部に形成する工程、
前記金属層の酸化処理を行う工程、および
前記酸化処理された金属層上にカーボンナノチューブを成長させる工程、を含んでなり、
前記成長時間が、前記カーボンナノチューブの長さが前記ビアホールの深さよりも大きくなるように決定される方法にも関する。
前記アモルファスシリコン層上に誘電体層を堆積させ、続いて前記誘電体層上に前記第二導電層を堆積させる工程、および
前記ビアホールをエッチングマスクで被覆して、前記アモルファスシリコン層に達するまでエッチングを行う工程、
を含む。
前記ビアホールをエッチングマスク(560)で被覆して、前記アモルファスシリコン層(530)に達するまでエッチングを行い、前記マスクを除去する工程、および
前記金属層(570)を堆積させ、続いて前記第二導電層上に存在する前記触媒複合体が除去されるように化学的−機械的研磨を行い、前記触媒複合体を前記ビアホールの底部に局在化させる工程、を含んでなる。
使用した基板は、アルゴンイオン照射によって酸化した単結晶シリコンであった。触媒系は、アルゴンイオンビームスパッタリング手段によって酸化したシリコン上に堆積した1nmの鉄層からなるものであった。
本例は、鉄層の堆積方法が異なる以外は上記と同様である。シリコンをフッ化水素酸でウエットエッチングした後、電子ビーム蒸着によって鉄層を堆積させた。その後の成長行程は例1と同様にして行った。得られた結果は上記で得られた結果と非常に近似している。
基板として窒化タンタル(TiN)を用いた。本例の触媒系は、5nmのアモルファスシリコン上に2nmの鉄層を設けたものであった。アモルファスシリコン層および鉄層を、同じ真空サイクルによって、イオンビームスパッタリング手段により堆積させた。
Claims (14)
- 導体または半導体基板(510)上にカーボンナノチューブマットを製造する方法であって、
少なくとも一層以上の金属層(570)を含んでなる触媒複合体(520,570)を、前記基板上に堆積させる工程、
前記金属層(570)の酸化処理を行う工程、および
前記酸化処理された金属層上にカーボンナノチューブ(580)を成長させる工程、
を含んでなることを特徴とする、方法。 - 前記酸化処理が、プラズマによる酸化手段または連続プラズマによる酸化手段により行われる、請求項1に記載の方法。
- 前記酸化処理が、第一の圧力および第一のエネルギーで第一のプラズマを用いる第一酸化工程と、前記第一の圧力よりも高い第二の圧力および前記第一のエネルギーよりも低い第二のエネルギーで第二のプラズマを用いる第二酸化工程と、を含んでなる、請求項2に記載の方法。
- 前記プラズマ誘起による酸化が室温において行われる、請求項2または3に記載の方法。
- 前記触媒複合体が、アモルファスシリコン層(530)上に堆積した金属層(570)を含んでなり、前記アモルファスシリコン層は前記導体基板(510)上に堆積している、請求項1〜3のいずれか一項に記載の方法。
- 前記基板が窒化チタンまたは窒化タンタルからなる、請求項5に記載の方法。
- 前記金属層が鉄またはコバルトからなる、請求項1〜6のいずれか一項に記載の方法。
- 第一および第二導電層を相互接続するためのビアを製造する方法であって、
前記第一導電層(510)上に拡散バリア(520)を堆積させる工程、
第一アモルファスシリコン層(530)と前記拡散バリア(520)上に堆積した金属層(570)とを含んでなる触媒複合体を、ビアホールの底部に形成する工程、
前記金属層(570)の酸化処理を行う工程、および
前記酸化処理された金属層上にカーボンナノチューブ(580)を成長させる工程、を含んでなり、
前記成長時間が、前記カーボンナノチューブの長さが前記ビアホールの深さよりも大きくなるように決定される、ことを特徴とする、方法。 - 前記拡散バリア(520)上に前記アモルファスシリコン層(530)を堆積させる工程、
前記アモルファスシリコン層上に誘電体層(540)を堆積させ、続いて前記誘電体層上に前記第二導電層(550)を堆積させる工程、および
前記ビアホールをエッチングマスク(560)で被覆して、前記アモルファスシリコン層(530)に達するまでエッチングを行う工程、
を含んでなる、請求項1に記載の方法。 - 前記ビアホールをエッチングする工程に続いて、前記金属層(570)を堆積させ、前記マスク(560)を除去して、前記触媒複合体を前記ビアホールの底部に局在化させる、請求項9に記載の方法。
- 前記ビアホールをエッチングする工程に続いて、前記マスク(560)を除去し、前記金属層(570)を堆積させて、前記触媒複合体を前記ビアホールの底部に局在化させ、前記第二導電層(550)を前記金属層(571)で被覆する、請求項9に記載の方法。
- 前記拡散バリア(520)上に誘電体層(540)を堆積させ、続いて前記誘電体層上に第二導電層(550)を堆積させる工程、
前記ビアホールをエッチングマスク(560)で被覆して、前記アモルファスシリコン層(530)に達するまでエッチングを行い、前記マスクを除去する工程、および
前記金属層(570)を堆積させ、続いて前記第二導電層上に存在する前記触媒複合体が除去されるように化学的−機械的研磨を行い、前記触媒複合体を前記ビアホールの底部に局在化させる工程、を含んでなる、請求項8に記載の方法。 - 前記金属層を、イオンビームスパッタリング手段によって堆積させる、請求項8〜12のいずれか一項に記載の方法。
- 前記酸化処理が、プラズマによる酸化手段または連続プラズマによる酸化手段により、室温において行われる、請求項8〜13のいずれか一項に記載の方法。
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JP2013040061A (ja) * | 2011-08-12 | 2013-02-28 | Tokyo Electron Ltd | カーボンナノチューブの加工方法及び加工装置 |
JP2013520002A (ja) * | 2010-02-11 | 2013-05-30 | コミッサリア ア レネルジー アトミーク エ オ ゼネルジ ザルタナテイヴ | 方向転換されたカーボンナノチューブで作られた相互接続構造 |
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JP5769916B2 (ja) | 2015-08-26 |
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