JP2022515349A - 照射されたエッチング溶液を使用した材料の粗さ低減方法 - Google Patents
照射されたエッチング溶液を使用した材料の粗さ低減方法 Download PDFInfo
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- JP2022515349A JP2022515349A JP2021533450A JP2021533450A JP2022515349A JP 2022515349 A JP2022515349 A JP 2022515349A JP 2021533450 A JP2021533450 A JP 2021533450A JP 2021533450 A JP2021533450 A JP 2021533450A JP 2022515349 A JP2022515349 A JP 2022515349A
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- etching solution
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- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
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- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
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- H01L21/3213—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
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- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
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Abstract
Description
本出願は、次の出願、すなわち、2018年12月14日に申請され、「ROUGHNESS REDUCTION METHODS FOR WET ETCH OF POLYCRYSTALLINE MATERIALS」と題された、米国仮特許出願第62/779,604号、及び2019年2月27日に申請され、「ROUGHNESS REDUCTION METHODS FOR MATERIALS USING ILLUMINATED ETCH SOLUTIONS」と題された、米国特許出願第16/287,669号の優先権を主張し、その全体は、参照により本明細書に援用される。
Claims (27)
- 超小型電子ワークピース用の基板を処理する方法であって、
基板の表面からエッチングすべき材料を有する、超小型電子ワークピース用の前記基板を受け取ることと、
前記基板の前記表面にエッチング溶液を塗布することであって、前記エッチング溶液は、前記材料に対する第1のレベルの反応物質を有することと、
前記エッチング溶液及び前記材料の前記表面を照射に露光して、前記材料の前記表面上に材料の改質層を形成することであって、前記露光により、前記エッチング溶液が、前記第1のレベルよりも大きい前記材料に対する第2のレベルの反応物質を有するようになることと、
材料の前記改質層を除去することと、
を含む、方法。 - 前記エッチング溶液は、気体エッチング溶液、液体エッチング溶液、又はそれらの組み合わせのうちの少なくとも1つを含む、請求項1に記載の方法。
- 前記材料をエッチングするために前記露光及び除去を周期的に繰り返すことを更に含む、請求項1に記載の方法。
- 前記露光及び除去は、単一処理工程又は異なる処理工程のうちの少なくとも1つで行われる、請求項1に記載の方法。
- 前記エッチング溶液は、液体エッチング溶液を含み、前記露光は、前記材料の前記表面を酸化させて、前記改質層として酸化物を形成する、請求項1に記載の方法。
- 酸化物の均一層が形成され、前記除去は、前記酸化物を溶解するために別個の処理工程で前記液体エッチング溶液を使用することを含む、請求項5に記載の方法。
- 前記エッチング溶液は、過酸化水素を含む水溶液を含み、前記除去は、錯化剤を含む水溶液を使用することを含む、請求項5に記載の方法。
- 前記錯化剤は、クエン酸塩、エチレンジアミン、エチレンジアミン四酢酸塩(EDTA)、リンゴ酸、シュウ酸、グリシン、アラニン、又はイミノ二酢酸のうちの少なくとも1つを含む、請求項7に記載の方法。
- 前記除去は、前記酸化と同時に前記液体エッチング溶液を使用して前記酸化物を溶解することを含み、前記酸化は、前記溶解の溶解速度定数よりも大きい酸化速度定数を有する、請求項5に記載の方法。
- 前記液体エッチング溶液は、過酸化水素及びクエン酸塩を含む水溶液を含む、請求項9に記載の方法。
- エッチングすべき前記材料は、多結晶金属を含み、前記多結晶金属はコバルトを含む、請求項5に記載の方法。
- 前記液体エッチング溶液は過酸化水素を含む、請求項5に記載の方法。
- 前記過酸化水素の前記照射により、前記液体エッチング溶液内にヒドロキシルラジカルの形成が生じ、反応物質の前記第2のレベルは、少なくとも部分的に前記ヒドロキシルラジカルの前記形成によって生じ、前記ヒドロキシルラジカルは、前記材料を酸化させる、請求項12に記載の方法。
- 前記照射は、560nm未満の波長又は10nm~400nmの波長のうちの少なくとも1つを有する光で前記液体エッチング溶液を照射することを含む、請求項13に記載の方法。
- 前記露光は、前記エッチング溶液を選択的に照射することを含む、請求項1に記載の方法。
- 前記選択的に照射することは、1つ又は複数のオン/オフパターンで、紫外線(UV)光で照射することを含む、請求項15に記載の方法。
- 前記選択的に照射することは、2つ以上の異なる色の光で照射することを含み、前記除去は、2つ以上の異なる色の光を使用して、材料の前記改質層を照射することを含む、請求項15に記載の方法。
- 前記選択的に照射することは、改質層が望まれる前記エッチング溶液の1つ又は複数の領域を照射し、前記エッチング溶液の他の領域を照射しないことを含む、請求項15に記載の方法。
- 前記エッチング溶液は、オゾン又は次亜塩素酸のうちの少なくとも1つを含む水溶液を含む、請求項1に記載の方法。
- 前記エッチング溶液の異なる領域が異なる方法で露光されて、前記異なる領域内に異なる量のエッチングを提供するように、前記露光を調節することを更に含む、請求項1に記載の方法。
- フィードフォワード制御を提供するために、前記材料を測定し、前記測定に基づいて前記調節を制御することを更に含み、前記測定は、前記材料の表面のトポロジ又は前記材料の厚さのうちの少なくとも1つを測定することを含む、請求項20に記載の方法。
- 超小型電子ワークピース用の基板を処理する方法であって、
基板の表面からエッチングすべき多結晶金属を有する、超小型電子ワークピース用の前記基板を受け取ることと、
前記基板の前記表面に過酸化水素を含む液体エッチング溶液を塗布することであって、前記液体エッチング溶液は、前記多結晶金属に対する第1のレベルの反応物質を有することと、
前記液体エッチング溶液を照射して、前記過酸化水素からのヒドロキシルラジカルの形成を生じさせることであって、ヒドロキシルラジカルの前記形成により、少なくとも部分的に、前記液体エッチング溶液が前記多結晶金属に対する第2のレベルの反応物質を有するようになり、反応物質の前記第2のレベルは反応物質の前記第1のレベルよりも大きいことと、
前記液体エッチング溶液で前記多結晶金属を酸化させて、酸化金属を形成することと、
前記酸化金属を除去することと、
を含む、方法。 - 前記多結晶金属をエッチングするために前記照射、酸化、及び除去を繰り返すことを更に含む、請求項22に記載の方法。
- 前記除去は、前記酸化と同時に前記液体エッチング溶液を使用して前記酸化金属を溶解することを含み、前記酸化は、前記溶解の溶解速度定数よりも大きい酸化速度定数を有する、請求項22に記載の方法。
- 材料の表面を研磨する方法であって、
研磨すべき材料を受け取ることと、
前記材料の表面にエッチング溶液を塗布することであって、前記エッチング溶液は、前記材料に対する第1のレベルの反応物質を有することと、
前記エッチング溶液及び前記材料の前記表面を照射に露光して、前記材料の前記表面上に材料の改質層を形成することであって、前記露光により、前記エッチング溶液が、前記第1のレベルよりも大きい前記材料に対する第2のレベルの反応物質を有するようになることと、
材料の前記改質層を除去して、前記材料が研磨面を有するようにすることであって、前記研磨面は、前記露光及び除去の前の前記材料の前記表面よりも小さい表面変動を有することと、
を含む、方法。 - 前記エッチング溶液は、気体エッチング溶液、液体エッチング溶液、又はそれらの組み合わせのうちの少なくとも1つを含む、請求項25に記載の方法。
- 前記材料を研磨するために前記露光及び除去を周期的に繰り返すことを更に含む、請求項25に記載の方法。
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US62/779,604 | 2018-12-14 | ||
US16/287,669 US10896824B2 (en) | 2018-12-14 | 2019-02-27 | Roughness reduction methods for materials using illuminated etch solutions |
US16/287,669 | 2019-02-27 | ||
PCT/US2019/065484 WO2020123510A1 (en) | 2018-12-14 | 2019-12-10 | Roughness reduction methods for materials using illuminated etch solutions |
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US8372757B2 (en) * | 2003-10-20 | 2013-02-12 | Novellus Systems, Inc. | Wet etching methods for copper removal and planarization in semiconductor processing |
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US7921859B2 (en) * | 2004-12-16 | 2011-04-12 | Sematech, Inc. | Method and apparatus for an in-situ ultraviolet cleaning tool |
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