JP2021524150A - 導電面上での選択的なポリマ形成のための多機能分子および導電面上での選択的なポリマ形成から得られる構造 - Google Patents
導電面上での選択的なポリマ形成のための多機能分子および導電面上での選択的なポリマ形成から得られる構造 Download PDFInfo
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Abstract
Description
Claims (23)
- 基板よりも上の交互に設けられた金属線および誘電体線を有する下側金属被覆層と、
前記下側金属被覆層の前記金属線上の分子ブラシ層であって、多機能分子を有する、分子ブラシ層と、
前記下側金属被覆層よりも上のトリブロック共重合体層であって、
前記下側金属被覆層の前記誘電体線よりも上の第1の分離ブロックコンポーネントと、
前記下側金属被覆層の前記金属線の前記分子ブラシ層上の交互に設けられた第2の分離ブロックコンポーネントおよび第3の分離ブロックコンポーネントであって、前記第3の分離ブロックコンポーネントは感光性である、交互に設けられた第2の分離ブロックコンポーネントおよび第3の分離ブロックコンポーネントと
を有する、トリブロック共重合体層と
を備える集積回路構造。 - 前記第3の分離ブロックコンポーネントの一箇所における導電ビアであって、前記金属線のうちの1つの上にある、導電ビア
をさらに備える、請求項1に記載の集積回路構造。 - 前記下側金属被覆層の前記誘電体線上の第2の異なる分子ブラシ層であって、前記第1の分離ブロックコンポーネントは、前記第2の異なる分子ブラシ層上にある、第2の異なる分子ブラシ層
をさらに備える、請求項1または2に記載の集積回路構造。 - 前記第2の異なる分子ブラシ層は、単一の機能ポリマ材料を有する、請求項3に記載の集積回路構造。
- 前記トリブロック共重合体層は、ポリスチレンおよび他のポリビニルアレーンと、ポリイソプレンおよび他のポリオレフィンと、ポリメタクリル酸および他のポリエステルと、ポリジメチルシロキサン(PDM)および関連するSiベースポリマと、ポリフェルセニルシランと、酸化ポリエチレン(PEO)ならびに関連するポリエーテルおよびポリビニルピリジンとのうちの任意の3つから成る群から選択されるトリブロック共重合体種を有する、
請求項1から4のいずれか一項に記載の集積回路構造。 - 交互に設けられた前記第2の分離ブロックコンポーネントおよび前記第3の分離ブロックコンポーネントは、約1:1という比を有する、請求項1から5のいずれか一項に記載の集積回路構造。
- 交互に設けられた前記第2の分離ブロックコンポーネントおよび前記第3の分離ブロックコンポーネントは、第2の分離ブロックコンポーネント対第3の分離ブロックコンポーネントがX:1という比を有し、Xは、1よりも大きく、前記第3の分離ブロックコンポーネントは、前記第2の分離ブロックコンポーネントに囲まれた柱状構造を含む、請求項1から6のいずれか一項に記載の集積回路構造。
- 前記下側金属被覆層の前記交互に設けられた金属線および誘電体線は、一定のピッチの格子パターンを有する、請求項1から7のいずれか一項に記載の集積回路構造。
- 前記トリブロック共重合体層の前記第3の分離ブロックコンポーネントは、極紫外線(EUV)源または電子ビーム源に対して感光性である、請求項1から8のいずれか一項に記載の集積回路構造。
- 基板よりも上の交互に設けられた金属線および誘電体線を含む下側金属被覆層を形成する段階と、
前記下側金属被覆層の前記金属線上に分子ブラシ層を形成する段階であって、前記分子ブラシ層は、多機能分子を含む、段階と、
前記下側金属被覆層よりも上にトリブロック共重合体層を形成する段階と、
前記トリブロック共重合体層を分離して、前記下側金属被覆層の前記誘電体線よりも上に第1の分離ブロックコンポーネントを形成し、かつ、前記下側金属被覆層の前記金属線上の前記分子ブラシ層上の交互に設けられた第2の分離ブロックコンポーネントおよび第3の分離ブロックコンポーネントを形成する段階であって、前記第3の分離ブロックコンポーネントは感光性である、段階と、
前記第3の分離ブロックコンポーネントの選択位置を照射および現像して、前記下側金属被覆層の前記金属線よりも上にビア開口を設ける段階と
を備える、集積回路構造を製造する方法。 - 前記第3の分離ブロックコンポーネントの選択位置を照射および現像して、ビア開口を設ける段階の後に、得られたパターニング済みのトリブロック共重合体層を足場材料として用いて、第1のレベルの交互に設けられた金属線および誘電体線よりも上に、前記第1のレベルの交互に設けられた金属線および誘電体線に結合された、かつ、前記第1のレベルの交互に設けられた金属線および誘電体線と直交する第2のレベルの交互に設けられた金属線および誘電体線を形成する段階
をさらに備える、請求項10に記載の方法。 - 前記トリブロック共重合体層を形成する段階の前に、前記下側金属被覆層の前記誘電体線上に第2の分子ブラシ層を形成する段階
をさらに備える、請求項10または11に記載の方法。 - 前記第2の分子ブラシ層は、単一の機能ポリマ材料を用いて形成される、請求項12に記載の方法。
- 前記トリブロック共重合体層を形成する段階は、ポリスチレンおよび他のポリビニルアレーンと、ポリイソプレンおよび他のポリオレフィンと、ポリメタクリル酸および他のポリエステルと、ポリジメチルシロキサン(PDM)および関連するSiベースポリマと、ポリフェルセニルシランと、酸化ポリエチレン(PEO)ならびに関連するポリエーテルおよびポリビニルピリジンとのうちの任意の3つから成る群から選択されるトリブロック共重合体種を提供する段階を有する、請求項10から13のいずれか一項に記載の方法。
- 前記下側金属被覆層の前記交互に設けられた金属線および誘電体線を形成する段階は、一定のピッチを有する格子パターンを形成する段階を有する、請求項10から14のいずれか一項に記載の方法。
- 前記第3の分離ブロックコンポーネントの前記選択位置を照射および現像する段階は、前記第3の分離ブロックコンポーネントの前記選択位置を極紫外線(EUV)源または電子ビーム源へ露出させる段階を有する、請求項10から15のいずれか一項に記載の方法。
- 交互に設けられた前記第2の分離ブロックコンポーネントおよび前記第3の分離ブロックコンポーネントは、約1:1という比を有する、請求項10から16のいずれか一項に記載の方法。
- 交互に設けられた前記第2の分離ブロックコンポーネントおよび前記第3の分離ブロックコンポーネントは、第2の分離ブロックコンポーネント対第3の分離ブロックコンポーネントがX:1という比を有し、Xは、1よりも大きく、前記第3の分離ブロックコンポーネントは、前記第2の分離ブロックコンポーネントに囲まれた柱状構造を含む、請求項10から17のいずれか一項に記載の方法。
- 基板よりも上の層間誘電体層(ILD層)に複数の導電線を形成する段階と、
前記ILD層の最上面に対して、前記複数の導電線のうちの1つおきに設けられた導電線を凹ませる段階と、
前記複数の導電線のうちの前記1つおきに設けられた導電線の各々よりも上の凹領域内で、前記複数の導電線のうちの前記1つおきに設けられた導電線上に誘電体キャッピング層を形成する段階と、
前記誘電体キャッピング層よりも上ではなく、前記複数の導電線のうちの凹んでいないものよりも上に、前記誘電体キャッピング層とは組成が異なるハードマスク層を形成する段階であって、前記ハードマスク層を形成する段階は、前記誘電体キャッピング層上ではなく、前記複数の導電線のうちの前記凹んでいないもの上に、多機能分子を含むブラシ層を形成する段階を有する、段階と、
前記複数の導電線のうちの前記1つおきに設けられた導電線のうちの1つよりも上の前記誘電体キャッピング層に開口を形成する段階と、
前記誘電体キャッピング層における前記開口内、および、前記複数の導電線のうちの前記凹んでいないもののうちの1つよりも上の前記ハードマスク層の部分上に、導電ビアを形成する段階と
を備える、集積回路構造を製造する方法。 - 前記ハードマスク層を形成する段階は、
前記ブラシ層の細孔またはスペーシングをハードマスク材料またはハードマスク前駆体で充填する段階と、
前記ブラシ層の実質的に全部を除去する段階であって、前記ハードマスク層は、前記ブラシ層の実質的に全部の除去中または除去後に、前記ハードマスク材料または前記ハードマスク前駆体から形成される、段階と
をさらに有する、
請求項19に記載の方法。 - 前記ブラシ層の実質的に全部を除去する段階は、前記ブラシ層の分子層をアッシングする段階を有する、請求項20に記載の方法。
- 前記ハードマスク層と前記誘電体キャッピング層とは、エッチング選択比が異なる、請求項19から21のいずれか一項に記載の方法。
- 前記複数の導電線を形成する段階は、ピッチ分割パターニング処理を用いる段階を有する、請求項19から22のいずれか一項に記載の方法。
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