JP7524343B2 - 選択的な金属化合物除去のためのシステム及び方法 - Google Patents
選択的な金属化合物除去のためのシステム及び方法 Download PDFInfo
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- JP7524343B2 JP7524343B2 JP2022562308A JP2022562308A JP7524343B2 JP 7524343 B2 JP7524343 B2 JP 7524343B2 JP 2022562308 A JP2022562308 A JP 2022562308A JP 2022562308 A JP2022562308 A JP 2022562308A JP 7524343 B2 JP7524343 B2 JP 7524343B2
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- hydrogen
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- 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
- 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
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/3213—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
- H01L21/32133—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only
- H01L21/32135—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only by vapour etching only
- H01L21/32136—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only by vapour etching only using plasmas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- 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
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- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
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- C23F1/10—Etching compositions
- C23F1/12—Gaseous compositions
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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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
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- H01L21/31122—Etching inorganic layers by chemical means by dry-etching of layers not containing Si, e.g. PZT, Al2O3
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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
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
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- H01L21/32133—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only
- H01L21/32135—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only by vapour etching only
- H01L21/32138—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only by vapour etching only pre- or post-treatments, e.g. anti-corrosion processes
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Description
Claims (21)
- エッチング方法であって、
半導体処理チャンバの遠隔プラズマ領域内へとフッ素含有前駆体及び水素含有前駆体を流すことであって、前記水素含有前駆体が前記フッ素含有前駆体の流量に対して少なくとも2:1の流量で流される、フッ素含有前駆体及び水素含有前駆体を流すことと、
前記フッ素含有前駆体及び前記水素含有前駆体のプラズマを形成して、プラズマ放出物を発生させることと、
前記プラズマ放出物を、基板を収容する基板処理領域内へと流すことであって、前記基板が、タンタル材料又はチタン材料の露出領域と、ケイ素含有材料の露出領域と、を含む、前記プラズマ放出物を流すことと、
前記基板と前記プラズマ放出物とを接触させることと、
前記タンタル材料又は前記チタン材料を、前記ケイ素含有材料に対して選択的に除去することと、
を含む、エッチング方法。 - 前記タンタル材料又は前記チタン材料が、タンタル金属若しくはチタン金属、又は、タンタル若しくはチタンの酸化物若しくは窒化物を含む、請求項1に記載のエッチング方法。
- 前記基板は、タングステン、コバルト、又は銅を含む金属の露出領域をさらに含む、請求項1に記載のエッチング方法。
- プラズマ出力が、1000W以下に維持される、請求項1に記載のエッチング方法。
- 前記エッチング方法が、150℃以上の温度で実行される、請求項1に記載のエッチング方法。
- 前記エッチング方法が、10Torr以下の圧力で実行される、請求項1に記載のエッチング方法。
- 前記フッ素含有前駆体を流す前に行われる前処理をさらに含み、前記前処理が、前記基板と、酸素、水素、水蒸気、又は窒素のうちの1つ以上を含むプラズマと、を接触させることを含む、請求項1に記載のエッチング方法。
- 前記エッチング方法の後に行われる後処理をさらに含み、前記後処理が、前記基板と、水素、窒素、酸素、又は水蒸気のうちの1つ以上を含むプラズマと、を接触させることを含む、請求項1に記載のエッチング方法。
- 前記半導体処理チャンバから前記基板を取り出すことと、
前記半導体処理チャンバのチャンバ壁から残留物を除去することと、
をさらに含む、請求項1に記載のエッチング方法。 - 前記残留物を除去することが、塩素を含有する前駆体若しくはプラズマ放出物、又は、臭素を含有する前駆体若しくはプラズマ放出物を提供することを含む、請求項9に記載のエッチング方法。
- エッチング方法であって、
酸素、水素、又は窒素のうちの1つ以上を含む処理前駆体のプラズマを形成して、処理プラズマ放出物を発生させることと、
半導体処理チャンバの基板処理領域内へと前記処理プラズマ放出物を流すことと、
前記基板処理領域内に収容された基板と、前記処理プラズマ放出物と、を接触させることであって、前記基板が、タンタル材料又はチタン材料の露出領域と、ケイ素含有材料の露出領域と、を画定する、基板と前記処理プラズマ放出物とを接触させることと、
前記タンタル材料又は前記チタン材料の表面から炭素含有材料を除去することと、
フッ素含有前駆体及び水素含有前駆体のプラズマを形成することであって、前記水素含有前駆体が前記フッ素含有前駆体に対して2:1以上の流量で流される、プラズマを形成することと、
前記基板とプラズマ放出物とを接触させることと、
前記タンタル材料又は前記チタン材料を、前記ケイ素含有材料に対して選択的に除去することと、
を含む、エッチング方法。 - 前記フッ素含有前駆体のプラズマを形成する間のプラズマ出力が、1000W以下に維持される、請求項11に記載のエッチング方法。
- 前記エッチング方法が、300℃以上の温度で実行される、請求項11に記載のエッチング方法。
- 前記エッチング方法が、10Torr以下の圧力で実行される、請求項11に記載のエッチング方法。
- 前記エッチング方法の後に行われる後処理をさらに含み、前記後処理が、前記基板と、水素を含むプラズマと、を接触させることを含む、請求項11に記載のエッチング方法。
- 前記半導体処理チャンバから前記基板を取り出すことと、
前記半導体処理チャンバのチャンバ壁から残留物を除去することと、
をさらに含む、請求項11に記載のエッチング方法。 - エッチング方法であって、
半導体処理チャンバの遠隔プラズマ領域内へとフッ素含有前駆体及び水素含有前駆体を流すことであって、前記水素含有前駆体が前記フッ素含有前駆体の流量に対して少なくとも2:1の流量で流される、フッ素含有前駆体及び水素含有前駆体を流すことと、
前記フッ素含有前駆体及び前記水素含有前駆体のプラズマを形成して、プラズマ放出物を発生させることと、
前記プラズマ放出物を、基板を収容する基板処理領域内へと流すことであって、前記基板が、タンタル材料又はチタン材料の露出領域と、ケイ素含有材料の露出領域と、を含む、前記プラズマ放出物を流すことと、
前記基板と前記プラズマ放出物とを接触させることと、
前記タンタル材料又は前記チタン材料を、前記ケイ素含有材料に対して選択的に除去することと、
水素を含む処理前駆体のプラズマを形成して、処理プラズマ放出物を発生させることと、
前記基板と前記処理プラズマ放出物とを接触させることと、
を含む、エッチング方法。 - 前記処理プラズマ放出物が、前記基板又は前記半導体処理チャンバのうちの1つ以上から残留フッ素を除去するよう構成される、請求項17に記載のエッチング方法。
- 前記半導体処理チャンバから前記基板を取り出すことと、
塩素含有前駆体によって、前記半導体処理チャンバのチャンバ壁から残留物を除去することと、
をさらに含む、請求項17に記載のエッチング方法。 - 前記水素含有前駆体は、炭化水素又は過酸化水素である、請求項1に記載のエッチング方法。
- 前記タンタル材料又はチタン材料は、タンタル材料である、請求項1に記載のエッチング方法。
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