JP6501191B2 - マイクロ・ナノバブルによる洗浄方法及び洗浄装置 - Google Patents
マイクロ・ナノバブルによる洗浄方法及び洗浄装置 Download PDFInfo
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- JP6501191B2 JP6501191B2 JP2016562624A JP2016562624A JP6501191B2 JP 6501191 B2 JP6501191 B2 JP 6501191B2 JP 2016562624 A JP2016562624 A JP 2016562624A JP 2016562624 A JP2016562624 A JP 2016562624A JP 6501191 B2 JP6501191 B2 JP 6501191B2
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- micro
- gas
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- cleaning
- liquid
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Description
[1]本発明は、基板上にレジスト膜が付着した被処理基板若しくは表面が金属又は金属化合物で汚染された被処理基板に対して、氷包埋法によってクライオ透過型電子顕微鏡で測定したときの平均粒径が100nm以下である気体のマイクロ・ナノバブルを含有し、且つ、温度が30〜90℃に保たれている処理液を噴射することにより、前記レジスト膜の剥離若しくは前記金属又は金属化合物の除去を行うことを特徴とするマイクロ・ナノバブルによる洗浄方法を提供する。
[2]本発明は、前記気体のマイクロ・ナノバブルが、氷包埋法によってクライオ透過型電子顕微鏡で測定したときの平均粒径が30nm以下であることを特徴とする前記[1]に記載のマイクロ・ナノバブルによる洗浄方法を提供する。
[3]本発明は、前記処理液に含まれる気体のマイクロ・ナノバブルにおいて、氷包埋法によってクライオ透過型電子顕微鏡で測定したときの密度が1mlあたり108個以上であることを特徴とする前記[1]又は[2]に記載のマイクロ・ナノバブルによる洗浄方法を提供する。
[4]本発明は、前記気体のマイクロ・ナノバブルを含有する処理液が、溶存気体を含む溶液を、2以上の貫通小穴を周方向に有する筒の外部から該貫通小穴を通して大気圧以上の圧力で噴射させるときに、前記筒の径方向断面と平行な同一平面上で対向するように配置された前記2以上の貫通小穴のそれぞれの開口部から噴射した溶存液を前記筒の中心に水撃が集中するように衝突させることによって発生させた気体のマイクロ・ナノバブルを含有した処理液であることを特徴とする前記[1]〜[3]の何れかに記載のマイクロ・ナノバブルによる洗浄方法を提供する。
[5]本発明は、前記気体がオゾン又は酸素であり、前記処理液が、オゾン又は酸素のマイクロ・ナノバブルを含有する純水であることを特徴とする前記[1]〜[4]の何れかに記載のマイクロ・ナノバブルによる洗浄方法を提供する。
[6]本発明は、前記気体が、オゾン又は酸素に加えて、二酸化炭素及び過酸化水素の少なくとも何れかを含む気体であることを特徴とする前記[1]〜[5]の何れかに記載のマイクロ・ナノバブルによる洗浄方法を提供する。
[7]本発明は、前記処理液を噴霧する前に、前記非処理基板の上の水滴及び水分を乾燥させる工程を有することを特徴とする前記[1]〜[6]の何れかに記載のマイクロ・ナノバブルによる洗浄方法を提供する。
[8]本発明は、前記気体のマイクロ・ナノバブルを含有する処理液を、洗浄対象物である前記被処理基板に超音波振動を与えながら噴射させることを特徴とする前記[1]〜[7]の何れかに記載のマイクロ・ナノバブルによる洗浄方法を提供する。
[9]本発明は、前記非処理基板と前記処理液を噴射するノズルヘッダーの近くに配置する電極との間に電圧を印加することを特徴とする前記[1]〜[7]の何れかに記載のマイクロ・ナノバブルによる洗浄方法を提供する。
[10]本発明は、前記処理液の温度が、50℃を超え85℃以下であることを特徴とする前記[1]〜[9]の何れかに記載のマイクロ・ナノバブルによる洗浄方法。
[11]本発明は、気体及び液体をそれぞれ吸引する手段と、前記気体及び前記液体を同時に加圧して搬送する手段と、該搬送された前記気体を含む前記液体を新たな気体と混合させることによって溶存気体を富化させるための気液混合槽と、該加熱装置によって加熱された溶存液を用いてマイクロ・ナノバブルを発生させるために、空洞の筒、該筒の周方向に2以上の貫通小穴のそれぞれの開口部が前記筒の径方向断面と平行な同一平面上で対向するように配置された前記2以上の貫通小穴、及び前記筒の少なくとも片端部にマイクロ・ナノバブル吐出口を有し、前記貫通小穴は該貫通小穴の断面中心部を通る延長線のすべてが前記筒の中心で交差するように配置される噴射ノズルと、前記気体のマイクロ・ナノバブルを含有する処理液を、表面にレジスト膜が付着した被処理基板又は表面が金属化合物で汚染された被処理基板に噴射するために前記噴射ノズルに接続されたノズルヘッダーと、を有するマイクロ・ナノバブル発生装置を備え、さらに、被処理基板支持を支持するために前記ノズルヘッダーに対向して設けるホルダー、及び前記気体のマイクロ・ナノバブルを含有する処理液を30〜90℃に加熱するための加熱手段を備えることを特徴とするマイクロ・ナノバブルによる洗浄装置を提供する。
[12]本発明は、前記加熱装置が、前記気液混合槽から送出された直後の前記気液混合の状態にある溶存液を加熱するために備える加熱装置であることと特徴とする前記[11]に記載のマイクロ・ナノバブルによる洗浄装置を提供する。
[13]本発明は、前記加熱装置が、前記気液混合槽の底部及び側部の少なくとも何れかの場所にヒータとして具備されていることを特徴とする前記[12]に記載のマイクロ・ナノバブルによる洗浄装置を提供する。
[14]本発明は、前記[11]〜[13]の何れかに記載のマイクロ・ナノバブルによる洗浄装置が、さらに、前記非処理基板の上の水滴及び水分を乾燥させる乾燥手段を有することを特徴とするマイクロ・ナノバブルによる洗浄装置を提供する。
[15]本発明は、前記ホルダーが、前記被処理基板に超音波振動を与えることができる超音波発生装置と接続していることを特徴とする前記[11]〜[14]の何れかに記載のマイクロ・ナノバブルによる洗浄装置を提供する。
[16]本発明は、前記非処理基板を支持するホルダーと前記処理液を噴射するノズルヘッダーの近くに配置する電極との間に電圧を印加する電圧印加手段を有することを特徴とする前記[11]〜[14]の何れかに記載のマイクロ・ナノバブルによる洗浄装置を提供する。
[17]本発明は、前記加熱装置が、さらに、前記ノズルヘッダー及び前記ホルダーの少なくとも何れかを加熱するための加熱装置又は温風発生装置を具備することを特徴とする前記[11]〜[16]の何れかに記載のマイクロ・ナノバブルによる洗浄装置を提供する。
[18]本発明は、前記加熱装置が、さらに、前記ノズルヘッダー及び前記ホルダーを一つの部屋として囲み、前記部屋の内部を30〜90℃の温度に制御するための空調機を備えることを特徴とする前記[11]〜[17]の何れかに記載のマイクロ・ナノバブルによる洗浄装置を提供する。
[19]本発明は、前記加熱するときの温度が50〜85℃であることを特徴とする前記[11]〜[18]の何れかに記載のマイクロ・ナノバブルによる洗浄装置を提供する。
前記特許文献4に開示された方法に従ってナノバブル水作製装置ΣPM-5(ベローズポンプ式) (シグマテクノロジー有限会社製)により空気ナノバブル水を作製し、純水によって100倍に希釈して測定用試料として用いた。また、参考用試料としてナノバブル作製前の純水を用いた。ナノバブル作製前の純水は、ナノバブルを含まない水に相当する。
前記特許文献4に開示された方法に従ってナノバブル水作製装置ΣPM-5 (べローズポンプ式) (シグマテクノロジー有限会社製)によりオゾンナノバブル水を作製した後、半月程度時間を経たオゾンナノバブルを純水によって100倍に希釈したものを測定試料として用いた。試料厚さは200nmである。この試料を実施例1と同じ試料急速凍結装置で急速凍結させた後、実施例1と同じクライオ透過型電子顕微によって試料温度約80Kにおいてアモルファス氷中に包埋されたナノバブルを直接観察した。観察に用いる電子線は、Low dose技術によって20電子/Å2程度であり、撮影中の試料温度の上昇はほとんどなかった。
オゾンを含むナノバブルに加え、さらに二酸化炭素の気体(炭酸ガス)を含ませた純水を処理液として使用した。被処理基板として実施例2と同じサイズの半導体ウエハを用いて、図1に示す洗浄装置に適用し、実施例2と同様の方法で半導体のウェハ基板上に付着している残渣レジスト膜の洗浄を行った。本実施例で使用するナノバブルを有する純水は、溶存気体富化工程においてオゾン発生器によって発生させたオゾンと炭酸ガス(オゾン量の約1/5の量)を導入し、溶存オゾン濃度を200ppm以上に調製したものを用いて、前記ナノバブル水作製装置ΣPM-5によって作製した。このようにして作製した処理液を数日間放置した後、オゾンと炭酸ガスとを含むナノバブルを実施例1と同じ方法で測定した結果、平均粒径が30nm未満で、処理液1mlあたりの密度も1016個/cc (ml)以上であることが確認された。この処理液は放置日数が前記実施例2に比べて短いため、図11に示す結果と比べてより微細粒径のナノバブル粒子を有し、また、ナノバブル粒子の密度もより高くなる傾向にあった。
前記実施例2で作製したオゾンのナノバブルを含む処理液と、被処理基板として実施例2と同じサイズの半導体ウエハとを用いて、図8に示す洗浄装置に適用し、前記処理液の温度条件を65〜70℃に代えて50〜55℃に変更したこと以外は、実施例2と同様の方法で半導体のウェハ基板上に付着している残渣レジスト膜の洗浄を行った。図8に示す乾燥手段27としては、カセット方式のスピンドライヤーを使用し、半導体ウエハーである被処理基板7を投入した後、環境エアを取り込む遠心力+吸気乾燥方式で乾燥を5分間行った。次いで、乾燥後の被処理基板7(半導体ウエハー)を取出して、図中の点線で示すように、回転機構を有するホルダー6に支持した。そして、ホルダー6により被処理基板7は回転させながらノズルヘッダー5からオゾンマイクロ・ナノバブルを有する処理液を図中の↓で示すように発射し、マイクロ・ナノバブルを発生させながら洗浄を行った。オゾンナノバブルを含む処理液の加熱は、瞬間的に加熱処理ができる加熱処理装置4によって約60℃まで温度を上げ、ノズルヘッダー5を通過する前記処理液の温度を50〜55℃に調整した。
前記実施例2で作製したオゾンナノバブルを含む純水を使用した処理液と、被処理基板として実施例2と同じサイズの半導体ウエハとを用いて、図1に示すように超音波発生装置8を有する洗浄装置に適用した。処理液の温度条件を65〜70℃に代えて50〜55℃に変更したこと以外は、実施例2と同様の方法で半導体のウェハ基板上に付着している残渣レジスト膜の洗浄を行った。本実施例は、超音波発生装置8によって被処理基板7に超音波振動を与えながらオゾンのナノバブルを含む処理液を噴射させる点で、前記実施例2に示す洗浄方法とは異なる。超音波振動の周波数は50kHzとした。
前記実施例2で作製したオゾンナノバブルを含む純水を使用した処理液と、被処理基板として実施例2と同じサイズの半導体ウエハとを用いて、図9に示す洗浄装置に適用した。処理液の温度条件を65〜70℃に代えて50〜55℃に変更したこと以外は、実施例2と同様の方法で半導体のウェハ基板上に付着している残渣レジスト膜の洗浄を行った。本実施例は、被処理基板7の洗浄において電圧印加手段31によって被処理基板7に電圧を印加しながらオゾンナノバブルを含む処理液を噴射させる点で、前記実施例2に示す洗浄方法とは異なる。図9に示す洗浄装置において、電源30として誘導性パルスパワー電源を使用し、ノズルヘッダーの近くに配置する電極29と被処理基板7を支持するホルダー6とを電源30の(+)側及び(−)側にそれぞれ接続し、電圧及び周波数をそれぞれ32V及び20kHzに設定したパルス電圧を印加しながら洗浄を行った。
Claims (17)
- 基板上にレジスト膜が付着した被処理基板若しくは表面が金属又は金属化合物で汚染された被処理基板に対して、氷包埋法によってクライオ透過型電子顕微鏡で測定したときの平均粒径及び密度がそれぞれ30nm以下及び1mlあたり1016個以上である気体のマイクロ・ナノバブルを含有し、且つ、温度が30〜90℃に保たれている処理液を噴射することにより、前記レジスト膜の剥離若しくは前記金属又は金属化合物の除去を行うことを特徴とするマイクロ・ナノバブルによる洗浄方法。
- 前記気体のマイクロ・ナノバブルを含有する処理液が、溶存気体を含む溶液を、2以上の貫通小穴を周方向に有する筒の外部から該貫通小穴を通して大気圧以上の圧力で噴射させるときに、前記筒の径方向断面と平行な同一平面上で対向するように配置された前記2以上の貫通小穴のそれぞれの開口部から噴射した溶存液を前記筒の中心に水撃が集中するように衝突させることによって発生させた気体のマイクロ・ナノバブルを含有した処理液であることを特徴とする請求項1に記載のマイクロ・ナノバブルによる洗浄方法。
- 前記気体がオゾン又は酸素であり、前記処理液が、前記オゾン又は酸素のマイクロ・ナノバブルを含有する純水であることを特徴とする請求項1又は4に記載のマイクロ・ナノバブルによる洗浄方法。
- 前記気体が、オゾン又は酸素に加えて、二酸化炭素及び過酸化水素の少なくとも何れかを含む気体であることを特徴とする請求項1、4及び5の何れかに記載のマイクロ・ナノバブルによる洗浄方法。
- 前記処理液を噴霧する前に、前記非処理基板上の水滴及び水分を乾燥させる工程を有することを特徴とする請求項1、4、5及び6の何れかに記載のマイクロ・ナノバブルによる洗浄方法
- 前記気体のマイクロ・ナノバブルを含有する処理液を、洗浄対象物である前記被処理基板に超音波振動を与えながら噴射させることを特徴とする請求項1、4、5、6及び7の何れかに記載のマイクロ・ナノバブルによる洗浄方法。
- 前記非処理基板と前記処理液を噴射するノズルヘッダーの近くに配置する電極との間に電圧を印加することを特徴とする請求項1、4、5、6及び7の何れかに記載のマイクロ・ナノバブルによる洗浄方法。
- 前記処理液の温度が、50℃を超え85℃以下であることを特徴とする請求項1、4、5、6、7、8及び9の何れかに記載のマイクロ・ナノバブルによる洗浄方法。
- 気体及び液体をそれぞれ吸引する手段と、前記気体及び前記液体を同時に加圧して搬送する手段と、
該搬送された前記気体を含む前記液体を新たな気体と混合させることによって溶存気体を富化させるための気液混合槽と、
該気液混合槽において気液混合の状態にある溶存液を用いて、氷包埋法によってクライオ透過型電子顕微鏡で測定したときの平均粒径及び密度がそれぞれ30nm以下及び1mlあたり1016個以上である気体のマイクロ・ナノバブルを発生させるために、空洞の筒、該筒の周方向に2以上の貫通小穴のそれぞれの開口部が前記筒の径方向断面と平行な同一平面上で対向するように配置された前記2以上の貫通小穴、及び前記筒の少なくとも片端部にマイクロ・ナノバブル吐出口を有し、前記貫通小穴は該貫通小穴の断面中心部を通る延長線のすべてが前記筒の中心で交差するように配置される噴射ノズルと、
前記気体のマイクロ・ナノバブルを含有する処理液を、基板上にレジスト膜が付着した被処理基板又は表面が金属化合物で汚染された被処理基板に噴射するため前記噴射ノズルに接続されたノズルヘッダーと、を有するマイクロ・ナノバブル発生装置を備え、さらに、
被処理基板を支持するために前記ノズルヘッダーに対向して設けるホルダー、及び前記気体のマイクロ・ナノバブルを含有する処理液を30〜90℃に加熱するための加熱手段を備えることを特徴とするマイクロ・ナノバブルによる洗浄装置。 - 前記加熱装置が、前記気液混合槽から送出された直後の前記気液混合の状態にある溶存液を加熱するために備える加熱装置であることと特徴とする請求項11に記載のマイクロ・ナノバブルによる洗浄装置。
- 前記加熱装置が、前記気液混合槽の底部及び側部の少なくとも何れかの場所にヒータとして具備されていることを特徴とする請求項12に記載のマイクロ・ナノバブルによる洗浄装置。
- 請求項11〜13の何れかに記載のマイクロ・ナノバブルによる洗浄装置が、さらに、前記非処理基板の上の水滴及び水分を乾燥させる乾燥手段を有することを特徴とするマイクロ・ナノバブルによる洗浄装置。
- 前記ホルダーは、前記被処理基板に超音波振動を与えることができる超音波発生装置と接続していることを特徴とする請求項11〜14の何れかに記載のマイクロ・ナノバブルによる洗浄装置。
- 前記非処理基板を支持するホルダーと前記処理液を噴射するノズルヘッダーの近くに配置する電極との間に、電圧を印加する電圧印加手段を有することを特徴とする請求項11〜14の何れかに記載のマイクロ・ナノバブルによる洗浄装置。
- 前記加熱装置が、さらに、前記ノズルヘッダー及び前記ホルダーの少なくとも何れかを加熱するための加熱装置又は温風発生装置を具備することを特徴とする請求項11〜16の何れかに記載のマイクロ・ナノバブルによる洗浄装置。
- 前記加熱装置が、さらに、前記ノズルヘッダー及び前記ホルダーを一つの部屋として囲み、前記部屋の内部を30〜90℃の温度に制御するための空調機を備えることを特徴とする請求項11〜17の何れかに記載のマイクロ・ナノバブルによる洗浄装置。
- 前記加熱するときの温度が50〜85℃であることを特徴とする請求項11〜18の何れかに記載のマイクロ・ナノバブルによる洗浄装置。
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2015
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- 2015-12-01 WO PCT/JP2015/083678 patent/WO2016088731A1/ja not_active Ceased
- 2015-12-01 CN CN201580033097.9A patent/CN106463387B/zh active Active
- 2015-12-01 KR KR1020167035300A patent/KR101934627B1/ko active Active
- 2015-12-01 EP EP15865774.2A patent/EP3144962A4/en not_active Withdrawn
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|---|---|
| JPWO2016088731A1 (ja) | 2017-10-05 |
| US10632506B2 (en) | 2020-04-28 |
| EP3144962A4 (en) | 2018-01-10 |
| KR20170008813A (ko) | 2017-01-24 |
| CN106463387A (zh) | 2017-02-22 |
| US20180161737A1 (en) | 2018-06-14 |
| KR101934627B1 (ko) | 2019-03-25 |
| CN106463387B (zh) | 2019-06-28 |
| US20190329520A1 (en) | 2019-10-31 |
| EP3144962A1 (en) | 2017-03-22 |
| US20200238654A9 (en) | 2020-07-30 |
| WO2016088731A1 (ja) | 2016-06-09 |
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