JP2021524149A - デバイス製造のための遷移金属酸化物膜の選択エッチングおよび制御された原子層エッチング - Google Patents
デバイス製造のための遷移金属酸化物膜の選択エッチングおよび制御された原子層エッチング Download PDFInfo
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- JP2021524149A JP2021524149A JP2020530527A JP2020530527A JP2021524149A JP 2021524149 A JP2021524149 A JP 2021524149A JP 2020530527 A JP2020530527 A JP 2020530527A JP 2020530527 A JP2020530527 A JP 2020530527A JP 2021524149 A JP2021524149 A JP 2021524149A
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- transition metal
- metal oxide
- oxide film
- hard mask
- layer
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- H01—ELECTRIC ELEMENTS
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- 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
- H01L21/3105—After-treatment
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- H01L21/31105—Etching inorganic layers
- H01L21/31111—Etching inorganic layers by chemical means
- H01L21/31116—Etching inorganic layers by chemical means by dry-etching
- H01L21/31122—Etching inorganic layers by chemical means by dry-etching of layers not containing Si, e.g. PZT, Al2O3
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- H01L21/02—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
- H01L21/3105—After-treatment
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- H01L21/31144—Etching the insulating layers by chemical or physical means using masks
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- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76829—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers
- H01L21/76834—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers formation of thin insulating films on the sidewalls or on top of conductors
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- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76897—Formation of self-aligned vias or contact plugs, i.e. involving a lithographically uncritical step
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- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
- H01L23/5226—Via connections in a multilevel interconnection structure
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- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
- H01L23/532—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body characterised by the materials
- H01L23/5329—Insulating materials
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- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/024—Manufacture or treatment of FETs having insulated gates [IGFET] of fin field-effect transistors [FinFET]
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Abstract
Description
Claims (24)
- 膜をドライエッチングする方法であって、
潜在孔形成材料を中に有する遷移金属酸化物膜を形成する段階と、
前記遷移金属酸化物膜の前記潜在孔形成材料の表面部分を除去して、前記遷移金属酸化物膜の多孔性領域を形成する段階と、
前記遷移金属酸化物膜の前記多孔性領域を除去する段階と
を備える方法。 - 前記潜在孔形成材料の前記表面部分を前記除去する段階は、第1エッチングプロセスにおいて実行され、前記遷移金属酸化物膜の前記多孔性領域の前記除去することは、第2の異なるエッチングプロセスにおいて実行される、請求項1に記載の方法。
- 前記潜在孔形成材料の前記表面部分を前記除去する段階、および、前記遷移金属酸化物膜の前記多孔性領域を前記除去することは、同一のエッチングプロセスにおいて実行される、請求項1に記載の方法。
- 前記潜在孔形成材料の前記表面部分を前記除去する段階、および、前記遷移金属酸化物膜の前記多孔性領域を前記除去する段階は、1または複数のプラズマエッチングプロセスを使用して実行される、請求項1から3のいずれか一項に記載の方法。
- 前記潜在孔形成材料を中に有する前記遷移金属酸化物膜を形成する段階は、気相堆積プロセス中に共反応酸化物前駆体を含む、請求項1から4のいずれか一項に記載の方法。
- 前記遷移金属酸化物膜は、酸化ハフニウム、酸化ジルコニウム、酸化チタン、酸化ニオブ、酸化タンタルから成る群から選択される遷移金属酸化物材料を含む、請求項1から5のいずれか一項に記載の方法。
- 前記潜在孔形成材料は、酸化アルミニウム、酸化 ガリウム、酸化スズ、酸化コバルト、酸化ニッケル、および酸化ケイ素から成る群から選択される材料を含む、請求項6に記載の方法。
- 前記潜在孔形成材料は、前記遷移金属酸化物膜の総体積の10パーセントから25パーセントを有する、請求項1から7のいずれか一項に記載の方法。
- 前記潜在孔形成材料は、前記遷移金属酸化物膜の中でランダムに分散される、請求項1から8のいずれか一項に記載の方法。
- 前記潜在孔形成材料は、前記遷移金属酸化物膜の中の1または複数の積層平面層として分散される、請求項1から9のいずれか一項に記載の方法。
- 前記潜在孔形成材料は、前記遷移金属酸化物膜の中の1または複数のコンフォーマル層として分散される、請求項1から10のいずれか一項に記載の方法。
- 集積回路構造であって、
基板の上方の層間誘電層(ILD層)における複数の導電線と、
前記複数の導電線の上、および、前記ILD層の最上面の上のハードマスク層であって、前記ハードマスク層は、前記複数の導電線の前記最上面の上にある、前記複数の導電線の前記最上面と整合された第1ハードマスクコンポーネントと、前記ILD層の前記最上面の領域の上にある、前記ILD層の前記最上面の領域と整合された第2ハードマスクコンポーネントとを含み、前記第1ハードマスクコンポーネントおよび第2ハードマスクコンポーネントは、互いに組成が異なり、前記第1ハードマスクコンポーネントは、潜在孔形成材料を中に有する遷移金属酸化物膜を含む、ハードマスク層と、
前記ハードマスク層における、前記複数の導電線のうち1つの部分上の開口の中にある導電ビアと
を備える集積回路構造。 - 前記遷移金属酸化物膜は、酸化ハフニウム、酸化ジルコニウム、酸化チタン、酸化ニオブ、および酸化タンタルから成る群から選択される遷移金属酸化物材料を含む、請求項12に記載の集積回路構造。
- 前記潜在孔形成材料は、酸化アルミニウムおよび酸化ケイ素から成る群から選択される材料を含む、請求項13に記載の集積回路構造。
- 前記第1ハードマスクコンポーネントは、前記複数の導電線の前記最上面に制限される、請求項12から14のいずれか一項に記載の集積回路構造。
- 前記第1ハードマスクコンポーネントは、前記ILD層の前記最上面の部分に延在する、請求項12から15のいずれか一項に記載の集積回路構造。
- 前記導電ビアの部分は、前記ハードマスク層の前記第2ハードマスクコンポーネントの部分上にある、請求項12から16のいずれか一項に記載の集積回路構造。
- 前記第1ハードマスクコンポーネントは、前記第2ハードマスクコンポーネントの最上面と実質的に同一平面である最上面を有する、請求項12から17のいずれか一項に記載の集積回路構造。
- 前記ハードマスク層の上の第2ILD層を更に含み、前記導電ビアは更に前記第2ILD層の開口の中にある、請求項12から18のいずれか一項に記載の集積回路構造。
- 前記複数の導電線の1つは、下層導電ビア構造に結合され、前記下層導電ビア構造は、前記集積回路構造の下層メタライゼーション層に接続される、請求項12から19のいずれか一項に記載の集積回路構造。
- 集積回路構造であって、
基板の上のゲートスタックと、
前記ゲートスタックの第1面にある第1導電性トレンチコンタクト、および、第2面にある第2導電性トレンチコンタクトと、
前記ゲートスタックの最上面の上にある、前記ゲートスタックの前記最上面と整合された第1ハードマスクコンポーネントと、
第1導電性トレンチコンタクトおよび第2導電性トレンチコンタクトの上にあり、前記第1導電性トレンチコンタクトおよび前記第2導電性トレンチコンタクトと整合された第2ハードマスクコンポーネントであって、前記第1ハードマスクコンポーネントおよび前記第2ハードマスクコンポーネントは、互いに組成が異なり、前記第1ハードマスクコンポーネントは、潜在孔形成材料を中に有する遷移金属酸化物膜を含む、第2ハードマスクコンポーネントと、
前記第1ハードマスクコンポーネントにおける、前記ゲートスタックの部分上の開口にある導電ビアと
を備える集積回路構造。 - 前記遷移金属酸化物膜は、酸化ハフニウム、酸化ジルコニウム、酸化チタン、酸化ニオブ、および酸化タンタルから成る群から選択される遷移金属酸化物材料を含む、請求項21に記載の集積回路構造。
- 前記潜在孔形成材料は、酸化アルミニウムおよび酸化ケイ素から成る群から選択される材料を含む、請求項22に記載の集積回路構造。
- 前記導電ビアの部分は、前記第2ハードマスクコンポーネントの部分上にある、請求項21から23のいずれか一項に記載の集積回路構造。
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