JP6334631B2 - 金属インターコネクトのために絶縁積層体を選択的にエッチングする方法 - Google Patents
金属インターコネクトのために絶縁積層体を選択的にエッチングする方法 Download PDFInfo
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- JP6334631B2 JP6334631B2 JP2016176581A JP2016176581A JP6334631B2 JP 6334631 B2 JP6334631 B2 JP 6334631B2 JP 2016176581 A JP2016176581 A JP 2016176581A JP 2016176581 A JP2016176581 A JP 2016176581A JP 6334631 B2 JP6334631 B2 JP 6334631B2
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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
- 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
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31105—Etching inorganic layers
- H01L21/31111—Etching inorganic layers by chemical means
- H01L21/31116—Etching inorganic layers by chemical means by dry-etching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
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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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67248—Temperature monitoring
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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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/6831—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using electrostatic chucks
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- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- 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
- H01L21/76802—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 by forming openings in dielectrics
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- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- 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
- H01L21/76802—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 by forming openings in dielectrics
- H01L21/76807—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 by forming openings in dielectrics for dual damascene structures
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- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- 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
- H01L21/76802—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 by forming openings in dielectrics
- H01L21/76807—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 by forming openings in dielectrics for dual damascene structures
- H01L21/76811—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 by forming openings in dielectrics for dual damascene structures involving multiple stacked pre-patterned masks
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- H—ELECTRICITY
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- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- 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
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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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- 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
- H01L21/76832—Multiple layers
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Description
Claims (16)
- SiCOH含有層を含む絶縁層をパターニングする方法であって:
キャップ層、前記キャップ層を覆うSiCOH含有層、及び、前記SiCOH含有層を覆うハードマスクを有する膜積層体を基板上に準備する工程;及び
基板温度制御法に従って、プラズマエッチングシステム内の温度制御された基板ホルダを利用する一連のエッチング処理を前記プラズマエッチングシステム内で実行することによって、前記膜積層体を通してパターンを転写する工程;
を有し、
前記基板温度制御法は:
前記パターンを前記ハードマスクを通して転写するときに制御されたプロファイルと限界寸法(CD)を実現するために、及び任意に前記パターンを前記SiCOH含有層へ部分的に転写するために、第1エッチングプロセスにおいて第1基板温度を制御し、前記第1基板温度は、20℃未満である工程;
前記SiCOH含有層を通して前記パターンを転写するときに前記SiCOH含有層と前記ハードマスクとの間でエッチング選択性を実現するために、第2エッチングプロセスにおいて前記第1基板温度よりも高温である第2基板温度を制御する工程;及び、
前記キャップ層を通して前記パターンを転写するために、第3エッチングプロセスにおいて前記第2基板温度よりも低温である第3基板温度を制御する工程;
を有し、
ここで:
前記キャップ層は、シリコン窒化物(Si x N y )、シリコンカーバイド(Si x C y )、シリコン炭窒化物(SiC x N y )、又はSiC x N y H z 、又はこれらの2種以上の組み合わせを有し、
前記ハードマスクは、金属を含む少なくとも1層の層を有する、
方法。 - 前記基板温度制御法が:
前記第2エッチングプロセスにおいて第2基板温度を50℃より高い温度に制御する工程;及び、
前記第3エッチングプロセスにおいて第3基板温度を20℃未満の温度に制御する工程を有する、請求項1に記載の方法。 - 前記パターンを転写する工程が、トレンチを最初に形成する金属ハードマスク(TFMHM)集積法又はビアを最初に形成してトレンチを最後に形成する(VFTL)集積法の中に組み込まれる、請求項1に記載の方法。
- 前記膜積層体が、前記SiCOH含有層と前記キャップ層との間に設けられる平坦化層を有し、前記平坦化層が、Siと、O、C、及びNからなる群から選ばれる1種類以上の元素を含む層を有する、請求項1に記載の方法。
- 前記ハードマスクが複数の層を有する、請求項1に記載の方法。
- 前記キャップ層が複数の層を有する、請求項1に記載の方法。
- 前記SiCOH含有層が、気相成長法を用いて形成される、請求項1に記載の方法。
- 前記膜積層体を基板上に準備する工程が:
前記ハードマスクを覆うようにマスクを形成する工程であって、前記マスクは、反射防止コーティング(ARC)を覆う放射線感受性材料の層を含む工程;及び、
リソグラフィ法を用いて前記マスク内にパターンを形成する工程;
をさらに有する、
請求項1に記載の方法。 - 前記温度制御された基板ホルダが:
温度制御された熱流体を循環させる流体チャネルを内部に有する支持体底部;及び
前記支持体底部の上部と断熱材を介して結合する基板支持体;
を有し、
前記基板支持体は:
前記基板支持体内部に埋め込まれた1つ以上の加熱素子;
前記基板の背面と接触することで前記基板を支持する上面;
前記基板支持体の上面に前記基板を保持する静電固定電極;
を有する、
請求項1に記載の方法。 - 前記温度制御された基板ホルダは、前記基板支持体の上面に設けられた複数のオリフィス又はチャネルのうちの少なくとも1つを通って前記基板の背面へ伝熱ガスを供給するように構成される背面ガス供給システムをさらに有する、請求項9に記載の方法。
- 前記背面ガス供給システムの複数のオリフィスは、前記基板の背面の実質的な中心領域と前記基板の背面の実質的な端部領域との間で、半径方向に背圧を変化させるように、前記基板支持体の上面の複数の領域内に配置される、請求項10に記載の方法。
- 前記一連のエッチングプロセスが:
前記基板の実質的な中心領域に対応する第1内側設定温度及び前記基板の実質的な端部領域に対応する第1外側設定温度を有する第1設定温度に基板支持体を制御し、かつ、前記支持体底部を第1底部温度に制御することによって、前記第1エッチングプロセス中に第1温度プロファイルに前記基板を維持する工程;
前記第1エッチングプロセス後であって前記第2エッチングプロセス前に、前記基板を前記第1温度プロファイルから第2温度プロファイルへ修正する工程;
前記第1内側設定温度及び前記第1外側設定温度とは異なる第2内側設定温度及び第2外側設定温度を有する第2設定温度に前記基板支持体を制御し、かつ、前記支持体底部を第2底部温度に制御することによって、前記第2エッチングプロセス中に第2温度プロファイルに前記基板を維持する工程;
前記第2エッチングプロセス後であって前記第3エッチングプロセス前に、前記基板を前記第2温度プロファイルから第3温度プロファイルへ修正する工程;並びに、
前記第2内側設定温度及び前記第2外側設定温度とは異なる第3内側設定温度及び第3外側設定温度を有する第3設定温度に前記基板支持体を制御し、かつ、前記支持体底部を第3底部温度に制御することによって、前記第3エッチングプロセス中に第3温度プロファイルに前記基板を維持する工程;
を有する、請求項9に記載の方法。 - 基板上にトレンチ−ビア構造を準備する方法であって:
キャップ層、前記キャップ層を覆うSiCOH含有層、及び、前記SiCOH含有層を覆うハードマスクを有する膜積層体を基板上に準備する工程;
前記ハードマスク内にトレンチパターンを生成する工程;
前記トレンチパターンと位置合わせされたビアパターンを備えるビアパターニング層を、前記ハードマスクを覆うように準備する工程;
プラズマエッチングシステム内で第1エッチングプロセスを用いて、前記ビアパターニング層中のビアパターンを前記SiCOH含有層へ少なくとも部分的に転写する工程;
前記ビアパターニング層を除去する工程;
前記プラズマエッチングシステム内で第2エッチングプロセスを用いて、前記キャップ層を貫通させないようにしながら、前記ハードマスク層中のトレンチパターンを前記SiCOH含有層へ転写する工程;
前記プラズマエッチングシステム内で第3エッチングプロセスを用いて、前記SiCOH含有層中のビアパターンを前記キャップ層へ転写する工程;並びに、
前記トレンチパターンの転写中、基板温度制御法に従って前記プラズマエッチングシステム内で温度制御された基板ホルダを利用する工程;
を有し、
前記基板温度制御法は:
前記ビアパターンを前記SiCOH含有層へ転写するときに制御されたプロファイルと限界寸法(CD)を実現するために、前記第1エッチングプロセスにおいて第1基板温度を制御し、前記第1基板温度は、20℃未満である工程;
前記トレンチパターンを前記SiCOH含有層へ転写するときに、前記SiCOH含有層と前記ハードマスクとの間でエッチング選択性を実現するために第2エッチングプロセスにおいて前記第1基板温度よりも高温である第2基板温度を制御する工程;及び、
前記ビアパターンを前記キャップ層へ転写するために、第3エッチングプロセスにおいて前記第2基板温度よりも低温である第3基板温度を制御する工程;
を有し、
ここで:
前記キャップ層は、シリコン窒化物(Si x N y )、シリコンカーバイド(Si x C y )、シリコン炭窒化物(SiC x N y )、又はSiC x N y H z 、又はこれらの2種以上の組み合わせを有し、
前記ハードマスクは、金属を含む少なくとも1層の層を有する、
方法。 - 前記基板温度制御法が:
前記第2エッチングプロセスにおいて第2基板温度を50℃より高い温度に制御する工程;及び、
前記第3エッチングプロセスにおいて第3基板温度を20℃未満の温度に制御する工程を有する、請求項13に記載の方法。 - 前記SiCOH含有層と前記キャップ層との間に平坦化層を設ける工程;及び、
前記ビアパターンを前記平坦化層へ転写する工程;
をさらに有する、請求項13に記載の方法。 - 基板上にトレンチ−ビア構造を準備する方法であって:
キャップ層、前記キャップ層を覆うSiCOH含有層、及び、前記SiCOH含有層を覆うハードマスクを有する膜積層体を基板上に準備する工程;
前記ハードマスク内にビアパターンを生成する工程;
プラズマエッチングシステム内で第1エッチングプロセスを用いて、前記ハードマスク層中のビアパターンを前記SiCOH含有層へ少なくとも部分的に転写する工程;
前記ビアパターンと位置合わせされたトレンチパターンを備えるトレンチパターニング層を、前記ハードマスクを覆うように準備する工程;
前記トレンチパターニング層を前記ハードマスクへ転写する工程、
前記トレンチパターン層を除去する工程;
前記プラズマエッチングシステム内で第2エッチングプロセスを用いて、前記キャップ層を貫通させないようにしながら、前記ハードマスク層中のトレンチパターンを前記SiCOH含有層へ転写する工程;
前記プラズマエッチングシステム内で第3エッチングプロセスを用いて、前記SiCOH含有層中のビアパターンを前記キャップ層へ転写する工程;並びに、
前記トレンチパターンの転写中、基板温度制御法に従って前記プラズマエッチングシステム内で温度制御された基板ホルダを利用する工程;
を有し、
前記基板温度制御法は:
前記ビアパターンを前記SiCOH含有層へ転写するときに制御されたプロファイルと限界寸法(CD)を実現するために、前記第1エッチングプロセスにおいて第1基板温度を制御し、前記第1基板温度は、20℃未満である工程;
前記トレンチパターンを前記SiCOH含有層へ転写するときに前記SiCOH含有層と前記ハードマスクとの間でエッチング選択性を実現するために、前記第2エッチングプロセスにおいて前記第1基板温度よりも高温である第2基板温度を制御する工程;及び、
前記ビアパターンを前記キャップ層へ転写するために、前記第3エッチングプロセスにおいて前記第2基板温度よりも低温である第3基板温度を制御する工程;
を有し、
ここで:
前記キャップ層は、シリコン窒化物(Si x N y )、シリコンカーバイド(Si x C y )、シリコン炭窒化物(SiC x N y )、又はSiC x N y H z 、又はこれらの2種以上の組み合わせを有し、
前記ハードマスクは、金属を含む少なくとも1層の層を有する、
方法。
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DE112011101976B4 (de) | 2015-09-10 |
US20110306214A1 (en) | 2011-12-15 |
TW201218274A (en) | 2012-05-01 |
KR101769651B1 (ko) | 2017-08-18 |
US8435901B2 (en) | 2013-05-07 |
JP2013529838A (ja) | 2013-07-22 |
DE112011101976T5 (de) | 2013-05-16 |
KR20130075766A (ko) | 2013-07-05 |
TWI512823B (zh) | 2015-12-11 |
JP6285716B2 (ja) | 2018-02-28 |
JP2017005268A (ja) | 2017-01-05 |
WO2011156253A1 (en) | 2011-12-15 |
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