JP7498384B2 - 高アスペクト構造からのデブリ除去 - Google Patents
高アスペクト構造からのデブリ除去 Download PDFInfo
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- JP7498384B2 JP7498384B2 JP2018539846A JP2018539846A JP7498384B2 JP 7498384 B2 JP7498384 B2 JP 7498384B2 JP 2018539846 A JP2018539846 A JP 2018539846A JP 2018539846 A JP2018539846 A JP 2018539846A JP 7498384 B2 JP7498384 B2 JP 7498384B2
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Description
この特許出願は、2007年9月17日出願の米国特許出願第11/898,836号(米国特許第8,287,653号として交付)の継続出願である2012年10月15日出願の米国特許出願第13/652,114号(米国特許第8,696,818号として交付)の分割出願である2014年2月28日出願の現在特許出願中の米国特許出願第14/193,725号の一部継続出願であり、かつその優先権利益を主張するものであり、これらの全ては、その全体が引用により本明細書に組み込まれている。
G(p,T)=U+pV-TS
として与えられるGibbの自由エネルギであり、ここで
U=内部エネルギ
p=圧力
V=容積
T=温度、及び
S=エントロピー
である。現行の慣例では、圧力、容積、及び温度を変えないので(これらのパラメータも同等に操作して望ましい効果を得ることが同様に可能なので、そうである必要はないが)、それらは詳細には議論されない。すなわち、上述の式中で操作される項は、内部エネルギと以下で議論する方法における駆動機構としてのエントロピーだけであることになる。エントロピーは、プローブ先端面は洗浄されている基板よりも清浄であることになる(すなわち、デブリ及び意図しない面汚染がない)と意図されるので、当然のことながら、基板の上の先端面を選択的に汚染する(及び、次に、その後に軟質材料の洗浄機パレットを汚染する)熱力学的駆動機構である。内部エネルギは、パレット、先端、デブリ、及び基板面の間でそれらのそれぞれの表面エネルギによって特徴付けられる熱力学特性によって操作される。微分表面エネルギをGibbs自由エネルギに関連付ける1つの方法は、単軸張力Pの下で半径r及び長さlの円柱に対する高温(すなわち、それらの融点温度の有意な画分)での工学材料のクリープ特性に関する理論的展開を考察することである:
dG=-P*dl+γ*dA、
ここで、
γ=表面エネルギ密度[J/m2]、及び
A=面積[m2]。
物体の応力及び外因性表面エネルギがそのGibbs自由エネルギにおけるファクタであるという知見は、これらのファクタ(表面エネルギ密度γに加えて)を同じく操作して先端(基板に対する)及びその後に続けて軟質パレットへのデブリの可逆的選択的接着を実行することができるであろうと信じさせる。これを行う手段は、印加応力(外的又は内的印加に関わらず)及び温度を含む。この駆動過程は、選択的に基板を洗浄して引き続き軟質パレットを選択的に汚染するための微分表面エネルギ勾配を与えるために正味ΔG<0による一連の面相互作用を常にもたらすことになることが意図されることに注意しなければならない。これは、斜面をより低いエネルギ状態へと選択的に転がり落ちるボールに類似していると考えることができるであろう(但し、ここでは、熱力学的表面エネルギにおける勾配は、全体系での全体的無秩序又はエントロピーも含む)。図6は、本明細書に説明する方法が選択的に汚染を除去して選択的に軟質パッチ上にそれを堆積させるために下り熱力学的Gibbs自由エネルギ勾配を与えることができると考えられる面相互作用の1つの可能なセットを示している。このシーケンスは、低表面エネルギフッ化炭素材料をダイヤモンドのような中から低程度の表面エネルギ先端材料と共に使用する現行の慣例態様を担うと考えられている理論的機構の1つである。
なお、好ましい構成態様として、本発明を次のように構成することもできる。
1. 基板の面からデブリを除去するためのシステムであって、
片持ちアームと、
近位部分と遠位部分とを有する先端であって、該先端の該近位部分で前記片持ちアームによって支持される前記先端と、
を含み、
少なくとも1つのナノフィブリルが、前記先端の前記遠位部分から延び、該ナノフィブリルは、前記デブリ又は前記基板の前記面に対して又はその周りで弾性的に変形するように構成される、
ことを特徴とするシステム。
2. 前記基板の前記面は、ナノ機械加工をその上に行うことができる面であることを特徴とする上記1に記載のシステム。
3. 前記基板は、フォトリソグラフィマスク又は半導体基板/ウェーハであることを特徴とする上記1に記載のシステム。
4. 前記基板は、膜、ペリクルフィルム、マイクロ電子機械システム(MEMS)、又はナノ電子機械システム(NEMS)であることを特徴とする上記1に記載のシステム。
5. 前記少なくとも1つのナノフィブリルは、硬性フィブリルであり、かつ0.5GPa以上の降伏応力を有することを特徴とする上記1に記載のシステム。
6. 前記少なくとも1つのナノフィブリルは、巻き付けフィブリルであり、かつ0.5GPaよりも小さい降伏応力を有することを特徴とする上記1に記載のシステム。
7. 前記巻き付けフィブリルは、デオキシリボ核酸、リボ核酸、アクチン、アミロイドナノ構造、及びイオノマーのうちの1又は2以上で作られることを特徴とする上記6に記載のシステム。
8. 前記巻き付けフィブリルは、水溶液に前記先端の少なくとも一部分を浸すこと、又はデオキシリボ核酸を含有する面に該先端の少なくともその部分を接触させることによって形成されることを特徴とする上記6に記載のシステム。
9. 前記デブリは、複数のナノ粒子を含むことを特徴とする上記1に記載のシステム。
10. 前記少なくとも1つのナノフィブリルは、少なくとも2つの硬性フィブリルを含み、該2つの硬性フィブリルは、該2つの硬性フィブリルが前記デブリの直径よりも小さい距離で離間するように前記先端に取り付けられることを特徴とする上記1に記載のシステム。
11. 前記少なくとも2つの硬性フィブリルは、0.5GPa以上の降伏応力を有することを特徴とする上記11に記載のシステム。
12. 前記少なくとも2つの硬性フィブリルは、等しくない長さを有することを特徴とする上記11に記載のシステム。
13. 前記少なくとも1つのナノフィブリルは、少なくとも2つの巻き付けフィブリルを含み、該少なくとも2つの巻き付けフィブリルは、少なくとも1つのナノ粒子の周りに巻き付くように構成されることを特徴とする上記1に記載のシステム。
14. 前記少なくとも2つの巻き付けフィブリルは、0.5GPaよりも小さい降伏応力を有することを特徴とする上記13に記載のシステム。
15. 前記先端は、前記デブリを結び付けるように構成された開放キャビティを有する非環状化合物を含む分子ピンセットで被覆されることを特徴とする上記1に記載のシステム。
16. 前記デブリは、ナノ粒子を含むことを特徴とする上記1に記載のシステム。
17. 前記分子ピンセットは、非共有結合、金属配位、疎水力、ファンデルワールス力、π-π相互作用、及び静電効果のうちの1又は2以上を通じてナノ粒子を結び付けることを特徴とする上記16に記載のシステム。
18. 前記少なくとも1つのナノフィブリルは、硬性及び巻き付けフィブリルの両方の組合せを含むことを特徴とする上記1に記載のシステム。
2 粒子
3 基板
4 軟質パッチ
5 先端
Claims (7)
- デブリを基板の表面から除去する方法であって、
前記基板上のデブリに隣接して先端を位置決めする工程と、
デブリを拘束するために、前記先端の表面上の流体コーティングを、荷電粒子ビームによって流体から固体に変化させ、デブリを取り囲んで、前記先端の表面に機械的に捕捉することにより、デブリを前記先端の表面で捕捉する工程と、
前記先端を前記基板から離れるように動かすことにより、前記基板の表面からデブリを除去する工程と、
を有し、
前記基板は極端紫外線リソグラフィフォトマスクであることを特徴とするデブリ除去方法。 - さらに、前記基板上の前記デブリを特定する工程、及び/又は前記デブリを除去した後、前記基板の表面を洗浄する工程を有する請求項1記載のデブリ除去方法。
- デブリを基板の表面から除去する方法であって、
前記デブリを捕捉する流体コーティングを有する先端を、前記基板上の前記デブリに隣接して位置決めする工程と、
前記流体コーティングを前記デブリに接触させる工程と、
前記先端の表面で前記デブリを取り囲んで捕捉するために、前記流体コーティングの材料が流体から固体に変化するように外部エネルギ源からエネルギーを付与する工程と、
前記先端を前記基板から離れるように動かすことにより、前記基板の前記表面から前記デブリを除去する工程と、
を有し、
前記基板は極端紫外線リソグラフィフォトマスクであることを特徴とするデブリ除去方法。 - 前記外部エネルギ源は、荷電粒子ビームである請求項3記載のデブリ除去方法。
- さらに、前記基板上の前記デブリを特定する工程、及び/又は前記デブリを除去した後、前記基板の表面を洗浄する工程を有する請求項3記載のデブリ除去方法。
- 基板の表面からデブリを除去するデブリ除去装置であって、
先端を前記基板上のデブリに隣接して位置決めする手段と、
エネルギーを付与することにより、前記先端の流体コーティングを流体から固体へ相変化させ、前記デブリを取り囲んで前記デブリを前記先端の表面に捕捉する外部エネルギ源と、
前記先端を前記基板から離れるように動かすことにより、前記基板の前記表面から前記デブリを除去する手段と、
を有し、
前記基板は極端紫外線リソグラフィフォトマスクであることを特徴とするデブリ除去装置。 - 前記外部エネルギ源は、荷電粒子ビームである請求項6記載のデブリ除去装置。
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EP3748431B1 (en) | 2021-09-08 |
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KR20180107184A (ko) | 2018-10-01 |
EP3748431A1 (en) | 2020-12-09 |
JP7495087B2 (ja) | 2024-06-04 |
DK3748431T3 (da) | 2021-12-06 |
EP3408707A1 (en) | 2018-12-05 |
US20240398508A1 (en) | 2024-12-05 |
KR102306619B1 (ko) | 2021-10-01 |
JP2023022833A (ja) | 2023-02-15 |
PL3748431T3 (pl) | 2022-01-24 |
WO2017132331A1 (en) | 2017-08-03 |
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