JP2022529610A - 多重スペーサパターニングのスキーム - Google Patents
多重スペーサパターニングのスキーム Download PDFInfo
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- JP2022529610A JP2022529610A JP2021560250A JP2021560250A JP2022529610A JP 2022529610 A JP2022529610 A JP 2022529610A JP 2021560250 A JP2021560250 A JP 2021560250A JP 2021560250 A JP2021560250 A JP 2021560250A JP 2022529610 A JP2022529610 A JP 2022529610A
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/033—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers
- H01L21/0334—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/0338—Process specially adapted to improve the resolution of the mask
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/033—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers
- H01L21/0334—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/0337—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane characterised by the process involved to create the mask, e.g. lift-off masks, sidewalls, or to modify the mask, e.g. pre-treatment, post-treatment
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- 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
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- 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
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- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
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- H01L21/31116—Etching inorganic layers by chemical means by dry-etching
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- 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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Abstract
【選択図】図3
Description
[0001]本開示の例は概して、膜層中にナノ構造物を形成することに関する。具体的には、本開示の実施形態は、正確な寸法制御を伴い、かつリソグラフィ関連エラーが最小である、微小寸法を有するフィーチャ(特徴部)を形成するための方法を提供する。
[0002]集積回路(IC)又はチップの製造においては、チップ設計者によって、チップの種々の層を表すパターンが作成される。製造プロセスにおいて各チップ層の設計を半導体基板上に転写するために、これらのパターンから、一連の再利用可能なマスク(又はフォトマスク)が作成される。マスクパターン生成システムでは、チップの各層の設計をそれぞれのマスク上に画像化するために、精密なレーザ又は電子ビームが使用される。かかるマスクは次いで、(写真のネガフィルムと同様に)各層の回路パターンを半導体基板上に転写するために使用される。これらの層は、プロセスのシーケンスを使用して構築され、微小トランジスタ及び電気回路(これらが完成した各チップを構成する)に転写される。ゆえに、マスクに欠陥があればそれがチップに転写されることがあり、性能に悪影響を与える可能性がある。非常に深刻な欠陥であれば、マスクを完全に役に立たなくすることもある。典型的には、1セット15~100のマスクがチップを構築するために使用され、これらは繰り返し使用されうる。
Claims (15)
- 基板上にフィーチャを形成するための方法であって、
基板上にマンドレル層を形成することと、
前記マンドレル層上にスペーサ層を共形形成することであって、前記スペーサ層はドープされたケイ素材料である、スペーサ層を共形形成することと、
前記スペーサ層をパターニングすることと、を含む、方法。 - 前記スペーサ層をパターニングすることが、
ハロゲン含有ガスを含む第1混合ガスを供給することと、
前記第1混合ガス中に第1RFソース電力設定を適用することと、を更に含む、請求項1に記載の方法。 - 前記第1混合ガスを供給している間に前記第1RFソース電力設定を第2RFソース電力設定に切り替えることであって、前記第2RFソース電力設定が前記第1RFソース電力設定を上回る、RFソース電力設定を切り替えることを更に含む、請求項2に記載の方法。
- 前記第1混合ガス中に第1RFバイアス電力設定を適用することと、
前記第1混合ガスを供給している間に前記第1RFバイアス電力設定を第2RFバイアス電力設定に切り替えることであって、前記第2RFバイアス電力設定が前記第1RFバイアス電力設定を下回る、RFバイアス電力設定を切り替えることと、を更に含む、請求項2に記載の方法。 - 酸素含有ガスを含む第2混合ガスを供給することを更に含む、請求項2に記載の方法。
- 前記第2混合ガスを供給している間に第3RFソース電力設定を適用することであって、前記第3RFソース電力設定が、前記第1混合ガスを供給している間の前記第1ソース電力設定及び第2ソース電力設定を上回る、第3RFソース電力設定を適用することを更に含む、請求項5に記載の方法。
- 前記スペーサ層の前記ドープされたケイ素材料は、III族、IV族、又はV族がドープされたケイ素材料からなる群から選択される、請求項1に記載の方法。
- 前記スペーサ層の前記ドープされたケイ素材料は、ホウ素がドープされたケイ素材料である、請求項1に記載の方法。
- 前記マンドレル層が有機材料から形成されたフォトレジスト層を含む、請求項1に記載の方法。
- パターニングされた前記スペーサ層上にライナ層を形成することであって、前記ライナ層が前記スペーサ層とは異なる材料から製造される、ライナ層を形成することを更に含む、請求項1に記載の方法。
- 前記ライナ層が酸化ケイ素層である、請求項10に記載の方法。
- 基板上にフィーチャを形成するための方法であって、
基板上のマンドレル層上にスペーサ層を共形形成することであって、前記スペーサ層はドープされたケイ素材料である、スペーサ層を共形形成することと、
第1混合ガスを使用して、前記スペーサ層の一部分を選択的に除去することと、
前記第1混合ガスとは異なる第2混合ガスを使用して、前記マンドレル層を選択的に除去することと、を含む、方法。 - 前記スペーサ層の前記一部分を選択的に除去することが、
前記第1混合ガスを供給している間に、第1RFソース電力設定を適用することと、
その後、前記第1混合ガスを供給し続けている間に、第1RFソース電力とは異なる第2RFソース電力設定を適用することであって、前記第2RFソース電力が前記第1RFソース電力よりも大きい、第2RFソース電力設定を適用することと、を更に含む、請求項12に記載の方法。 - 前記スペーサ層の前記一部分を選択的に除去することが、
前記第1混合ガスを供給している間に、第1RFバイアス電力設定を適用することと、
その後、前記第1混合ガスを供給し続けている間に、第1RFソース電力とは異なる第2RFバイアス電力設定を適用することであって、前記第2RFバイアス電力が前記第1RFバイアス電力よりも小さい、第2RFバイアス電力設定を適用することと、を更に含む、請求項12に記載の方法。 - 基板上にフィーチャを形成するための方法であって、
基板上のマンドレル層上にスペーサ層を共形形成することであって、前記スペーサ層はドープされたケイ素材料であり、前記マンドレル層は、最高で摂氏200度の熱プロセスのもとで耐久性を有する有機材料から製造される、スペーサ層を共形形成することと、
第1混合ガスを使用して、前記スペーサ層の一部分を選択的に除去することと、
前記第1混合ガスとは異なる第2混合ガスを使用して、前記マンドレル層を選択的に除去することと、を含む、方法。
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US20220367251A1 (en) * | 2021-05-12 | 2022-11-17 | Taiwan Semiconductor Manufacturing Co., Ltd. | Semiconductor Devices and Methods of Manufacture |
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