JP4350732B2 - 基板上に炭素ナノチューブを形成させる方法、これを利用した導線形成方法及びこれを利用したインダクター素子製造方法 - Google Patents
基板上に炭素ナノチューブを形成させる方法、これを利用した導線形成方法及びこれを利用したインダクター素子製造方法 Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 158
- 239000002041 carbon nanotube Substances 0.000 title claims description 134
- 229910021393 carbon nanotube Inorganic materials 0.000 title claims description 134
- 238000000034 method Methods 0.000 title claims description 93
- 239000000758 substrate Substances 0.000 title claims description 47
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 118
- 239000002184 metal Substances 0.000 claims description 118
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 24
- 239000002904 solvent Substances 0.000 claims description 24
- 238000000059 patterning Methods 0.000 claims description 22
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 21
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 21
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 21
- 238000011049 filling Methods 0.000 claims description 20
- 238000001704 evaporation Methods 0.000 claims description 14
- NQBXSWAWVZHKBZ-UHFFFAOYSA-N 2-butoxyethyl acetate Chemical compound CCCCOCCOC(C)=O NQBXSWAWVZHKBZ-UHFFFAOYSA-N 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000002071 nanotube Substances 0.000 claims description 3
- 239000010409 thin film Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 description 16
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- 239000002109 single walled nanotube Substances 0.000 description 12
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 235000012239 silicon dioxide Nutrition 0.000 description 6
- 238000009713 electroplating Methods 0.000 description 5
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- 150000002739 metals Chemical class 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
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- 150000003624 transition metals Chemical class 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- XMWRBQBLMFGWIX-UHFFFAOYSA-N C60 fullerene Chemical compound C12=C3C(C4=C56)=C7C8=C5C5=C9C%10=C6C6=C4C1=C1C4=C6C6=C%10C%10=C9C9=C%11C5=C8C5=C8C7=C3C3=C7C2=C1C1=C2C4=C6C4=C%10C6=C9C9=C%11C5=C5C8=C3C3=C7C1=C1C2=C4C6=C2C9=C5C3=C12 XMWRBQBLMFGWIX-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 150000001721 carbon Chemical group 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
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- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
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- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
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- 229910052905 tridymite Inorganic materials 0.000 description 1
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Description
レーザ アブレーション(Laser ablation)法は、SWNTのみを合成することができるし、他の方法と比較してかなり高い純度を得ることができる。この方法は、1、200℃に加熱された溶炉石英管内側に転移金属と黒鉛パウダーを一定比率で混合して作った試験片を外部でレーザを利用して気化させた後、バッファー気体であるアルゴンを通じて冷却器に移動された後、収集される。
図1に示すように、従来の化学気象蒸着法を利用した工程の構造は、基板1、金属触媒2、モールド3及び炭素ナノチューブ5からなる。
前述のように、従来の化学気象蒸着法を利用した工程は、金属触媒2上面に垂直方向のみに炭素ナノチューブが形成される問題点があり、金属触媒2が必須である点で応用分野に限界がある。
ここで、前記炭素ナノチューブは所定の溶剤に分散している状態であることが可能である。
前記炭素ナノチューブは所定の溶剤に分散している状態であるものを含むことが可能である。
<半導体基板上に炭素ナノチューブを形成させる方法>
図4は、本発明による炭素ナノチューブを備えた電極を用いた半導体素子を製造する方法を順に示す工程図である。
図6は、本発明を利用したインダクター素子製造方法を順に示す断面図である。
段階600Aは、基板10上に電解メッキをするための第1金属電極層60aを形成する段階である。第1金属電極層60aはスパッタリング(sputtering)法または蒸着法(evaporation)で形成させた後、第1金属電極層60a上面に第1モールド20aを、従来の写真、蝕刻工程で3次元形状の第1モールド20aにパターニングする。第1モールド20aには、インダクターを支持するためのヴィアホール(via hole)及び炭素ナノチューブ30が満たされる溝が形成される。
図7は、本発明によるインダクター素子製造方法の他の実施形態を順に示す断面である。
段階700Aは、基板10上に炭素ナノチューブ30を形成するために第1モールド20aを3次元形状にパターニングする段階である。この時、第1モールド20aの間にインダクターを支持するためのヴィアホール及び炭素ナノチューブ30が満たされる溝が形成される。
20b : 第2 モールド 30 : 炭素ナノチューブ
40: ドロッパ 50 : 道具
60a : 第1金属電極層 60b: 第2金属電極層
60c : 第3金属電極層 60d: 第4金属電極層
60 : 液体
Claims (15)
- (a)基板上にモールドをパターニングして溝を形成する段階と、
(b)パターニングされた前記溝及び前記モールド上に炭素ナノチューブを塗布する段階と、
(c)前記モールド上に塗布された炭素ナノチューブを前記溝に満たして入れる段階と、
(d)前記モールドを取り除く段階と、
を含むことを特徴とする、基板上に炭素ナノチューブを形成させる方法。 - 前記炭素ナノチューブは溶剤に分散している状態であることを特徴とする、請求項1記載の基板上に炭素ナノチューブを形成させる方法。
- 前記溶剤は、水、アセトン、エタノール(ethanol)、メタノール、イソプロフィルアルコールまたはブチルセロソルブアセテート(butyl cellosolve acetate)内の何れかの一つであることを特徴とする、請求項2記載の基板上に炭素ナノチューブを形成させる方法。
- 前記(c)段階以後に、前記溶剤を蒸発させる段階をさらに含むことを特徴とする、請求項2記載の基板上に炭素ナノチューブを形成させる方法。
- 前記(c)段階以後に、前記炭素ナノチューブが満たされた前記溝に液体を入れ込む段階と、前記液体を蒸発させる段階と、をさらに含むことを特徴とする、請求項2記載の基板上に炭素ナノチューブを形成させる方法。
- 前記液体は、水、アセトン、エタノール、メタノール、イソプロフィルアルコールまたはブチルセロソルブアセテート内の何れの一つのことを特徴とする、請求項5記載の基板上に炭素ナノチューブを形成させる方法。
- (a)基板上に第1 モールドをパターニングして溝を形成して、前記第1 モールドがパターニングされた基板上に第1金属を形成する段階と、
(b)前記第1金属上に炭素ナノチューブを塗布する段階と、
(c)前記第1金属上に塗布された前記炭素ナノチューブを前記溝に満たして入れて前記第1金属上に第2モールドを形成する段階と、
(d)前記溝に満たされた炭素ナノチューブ構造体上に第2金属を形成する段階と、
(e)前記第1 モールド、前記第2モールド、並びに、前記第1及び第2モールドで挟まれた部分の前記第1金属を取り除く段階と、
を含むことを特徴とする、炭素ナノチューブを利用した導線形成方法。 - 前記炭素ナノチューブは溶剤に分散している状態であることを特徴とする、請求項7記載の炭素ナノチューブを利用した導線形成方法。
- 前記(d)段階で
前記第1金属と前記第2金属が電気的に接続されることを特徴とする、請求項7記載の炭素ナノチューブを利用した導線形成方法。 - 前記(d)段階で
前記炭素ナノチューブ構造体の間に前記第2金属を満たして入れるか、または、前記炭素ナノチューブ構造体を取り囲むように前記第2金属が金属薄膜を形成することを特徴とする、請求項7記載の炭素ナノチューブを利用した導線形成方法。 - 前記第1モールドと前記第2モールドは同じ形状であることを特徴とする、請求項8記載の炭素ナノチューブを利用した導線形成方法。
- (a)基板上に第1金属を形成した後、前記第1金属上に第1モールドをパターニングして溝及びヴィアホールを形成する段階と、
(b)前記ヴィアホール内部に第2金属を形成する段階と、
(c)前記(b)段階による基板の上に第3金属を形成する段階と、
(d)前記(c)段階による基板の上に炭素ナノチューブを塗布した後、前記塗布した炭素ナノチューブを前記溝に満たして入れて炭素ナノチューブ構造体を形成して、前記溝に液体を入れる段階と、
(e)前記(d)段階による基板の上に第2モールドをパターニングする段階と、
(f)前記炭素ナノチューブ構造体上に第4金属を形成する段階と、
(g)前記第1モールド、前記第2モールド、前記第1モールドと基板に挟まれた部分の前記第1金属、及び、前記第1モールドと第2モールドで挟まれた部分の前記第3金属を取り除く段階と、を含み、
前記炭素ナノチューブは溶剤に分散している状態であることを特徴とする、炭素ナノチューブを利用したインダクター素子製造方法。 - 前記第1モールドと前記第2モールドは同じ形状であることを特徴とする、請求項12記載の炭素ナノチューブを利用したインダクター素子製造方法。
- (a)基板上に第1モールドをパターニングして溝及びヴィアホールを形成する段階と、
(b)前記(a)段階による基板の上に第1金属を形成する段階と、
(c)前記(b)段階による基板の上に炭素ナノチューブを塗布した後、前記溝に満たして入れて炭素ナノチューブ構造体を形成して、前記溝に液体を入れる段階と、
(d)前記第1金属上に第2モールドを形成する段階と、
(e)前記炭素ナノチューブ構造体上に第2金属を形成する段階と、
(f)前記第1モールド、前記第2モールド、及び、前記第1モールドと第2モールドで挟まれた部分の前記第1金属を取り除く段階と、
を含むことを特徴とする、炭素ナノチューブを利用したインダクター素子製造方法。 - 前記第1 モールドと前記第2モールドは同じ形状であることを特徴とする、請求項14記載の炭素ナノチューブを利用したインダクター素子製造方法。
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