JP6346115B2 - パターン形成方法 - Google Patents
パターン形成方法 Download PDFInfo
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- JP6346115B2 JP6346115B2 JP2015061796A JP2015061796A JP6346115B2 JP 6346115 B2 JP6346115 B2 JP 6346115B2 JP 2015061796 A JP2015061796 A JP 2015061796A JP 2015061796 A JP2015061796 A JP 2015061796A JP 6346115 B2 JP6346115 B2 JP 6346115B2
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- phase
- block copolymer
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- 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
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Description
本実施形態のパターン形成方法は、基板上に、第1の重合体と、第1の重合体より低い表面エネルギーを有する第2の重合体とを含むブロック共重合体層を形成し、ブロック共重合体層を熱処理し、ブロック共重合体層を、第1の重合体を含む第1の相と、第2の重合体を含む第2の相とに相分離させ、原子堆積法を用いて、第1の相上に選択的に金属層を形成し、且つ、第2の相を選択的に除去する。
本実施形態のパターン形成方法は、基板上に、第1の重合体と、第1の重合体より低い表面エネルギーを有する第2の重合体とを含むブロック共重合体層を形成し、ブロック共重合体層を熱処理し、ブロック共重合体層を、第1の重合体を含む第1の相と、第2の重合体を含む第2の相とに相分離させ、原子堆積法を用いて、第1の相上に選択的に酸化物層を形成し、且つ、第2の相を選択的に除去する。
本実施形態のパターン形成方法は、基板上に、第1の重合体と、第1の重合体より低い表面エネルギーを有する第2の重合体とを含むブロック共重合体層を形成し、ブロック共重合体層を熱処理し、ブロック共重合体層を、第1の重合体を含む第1の相と、第2の重合体を含む第2の相とに相分離させ、原子堆積法を用いて、第1の相上に選択的に酸化物層を形成し、且つ、第2の相を選択的に除去する。
本実施形態のパターン形成方法は、基板上に、第1の重合体と、第1の重合体より低い表面エネルギーを有する第2の重合体とを含むブロック共重合体層を形成し、ブロック共重合体層を熱処理し、ブロック共重合体層を、第1の重合体を含む第1の相と、第2の重合体を含む第2の相とに相分離させ、原子堆積法を用いて、第1の相上に選択的に酸化物層を形成し、且つ、第2の相を選択的に除去する。
第1の実施形態のパターン形成方法の実施例を以下説明する。
ガイドパターン作製材料をPHS−OHとPHS−r−PMMA−OHからヒドロキシル基末端のポリ(2−ビニルピリジン)(P2VP−OH)とポリスチレン−ポリ(2−ビニルピリジン)ランダムコポリマー(PS−r−P2VP−OH)に変更し、ブロック共重合体材料をPHS−b−PMMAからPS−P2VPブロック共重合体(PS−b−P2VP)に変更した以外は実施例1と同様の処理を行った。なお、P2VP−OHの分子量Mn=50,000、多分散度Mw/Mn=1.05で、PS−r−P2VP−OHの分子量Mn=50,000、多分散度Mw/Mn=1.05、体積分率fPS=0.5で、PS−b−P2VPの分子量Mn=122,000、多分散度Mw/Mn=1.08、体積分率fPHS=0.5である。
第2の実施形態のパターン形成方法の実施例を以下説明する。
ガイドパターン作製材料をPHS−OHとPHS−r−PMMA−OHからヒドロキシル基末端のポリ(2−ビニルピリジン)(P2VP−OH)とポリスチレン−ポリ(2−ビニルピリジン)ランダムコポリマー(PS−r−P2VP−OH)に変更した以外は実施例3と同様の処理を行った。
第3の実施形態のパターン形成方法の実施例を以下説明する。
ガイドパターン作製材料をPHS−OHとPHS−r−PMMA−OHからヒドロキシル基末端のポリ(2−ビニルピリジン)(P2VP−OH)とポリスチレン−ポリ(2−ビニルピリジン)ランダムコポリマー(PS−r−P2VP−OH)に変更し、ブロック共重合体材料をPHS−b−PMMAからPS−P2VPブロック共重合体(PS−b−P2VP)に変更した以外は実施例5と同様の処理を行った。なお、P2VP−OHの分子量Mn=50,000、多分散度Mw/Mn=1.05で、PS−r−P2VP−OHの分子量Mn=50,000、多分散度Mw/Mn=1.05、体積分率fPS=0.5で、PS−b−P2VPの分子量Mn=122,000、多分散度Mw/Mn=1.08、体積分率fPHS=0.5である。
PHS−b−PMMAでL&Sパターン形成するところまでは実施例1と同様の処理を行う。
ガイドパターン作製材料をPHS−OHとPHS−r−PMMA−OHからヒドロキシル基末端のポリ(2−ビニルピリジン)(P2VP−OH)とポリスチレン−ポリ(2−ビニルピリジン)ランダムコポリマー(PS−r−P2VP−OH)に変更し、ブロック共重合体材料をPHS−b−PMMAからPS−P2VPブロック共重合体(PS−b−P2VP)に変更した以外は実施例7と同様の処理を行った。なお、P2VP−OHの分子量Mn=50,000、多分散度Mw/Mn=1.05で、PS−r−P2VP−OHの分子量Mn=50,000、多分散度Mw/Mn=1.05、体積分率fPS=0.5で、PS−b−P2VPの分子量Mn=122,000、多分散度Mw/Mn=1.08、体積分率fPHS=0.5である。
PHS−b−PMMAでL&Sパターン形成するところまでは実施例3と同様な処理を行う。
ガイドパターン作製材料をPHS−OHとPHS−r−PMMA−OHからヒドロキシル基末端のポリ(2−ビニルピリジン)(P2VP−OH)とポリスチレン−ポリ(2−ビニルピリジン)ランダムコポリマー(PS−r−P2VP−OH)に変更し、ブロック共重合体材料をPHS−b−PMMAからPS−P2VPブロック共重合体(PS−b−P2VP)に変更した以外は実施例9と同様の処理を行った。
なお、P2VP−OHの分子量Mn=50,000、多分散度Mw/Mn=1.05で、PS−r−P2VP−OHの分子量Mn=50,000、多分散度Mw/Mn=1.05、体積分率fPS=0.5で、PS−b−P2VPの分子量Mn=122,000、多分散度Mw/Mn=1.08、体積分率fPHS=0.5である。
第4の実施形態のパターン形成方法の実施例を以下説明する。
PS−b−P2VPの分子量Mn=122,000、多分散度Mw/Mn=1.08、体積分率fPHS=0.75である。
14 ブロック共重合体層
14a 第1の相
14b 第2の相
16 金属層
Claims (18)
- 基板の上に、第1の重合体と、前記第1の重合体より低い表面エネルギーを有する第2の重合体とを含むブロック共重合体層を形成し、
前記ブロック共重合体層を熱処理し、前記ブロック共重合体層を、前記第1の重合体を含む第1の相と、前記第2の重合体を含む第2の相とに相分離させ、
原子堆積法を用いて、前記第1の相の上に選択的に金属層を形成し、且つ、前記第2の相を選択的に除去するパターン形成方法。 - 前記第2の相を除去した領域に絶縁物層を形成する請求項1記載のパターン形成方法。
- 前記第1の重合体は、側鎖にヒドロキシル基、カルボキシル基、アミノ基、アミド基、イソシアネート基、ピリジン環の群から選ばれる官能基を含み、前記第2の重合体は、側鎖にヒドロキシル基、カルボキシル基、アミノ基、アミド基、イソシアネート基、ピリジン環の群から選ばれる官能基を含まない請求項1又は請求項2記載のパターン形成方法。
- 前記ブロック共重合体層は、ポリスチレン誘導体とポリメタクリレート誘導体、ポリスチレン誘導体とポリアクリレート誘導体、ポリメタクリレート誘導体とポリアクリレート誘導体、ポリスチレン誘導体とポリスチレン誘導体、ポリメタクリレート誘導体とポリメタクリレート誘導体、ポリアクリレート誘導体とポリアクリレート誘導体のいずれかの組み合わせから構成される請求項1ないし請求項3いずれか一項記載のパターン形成方法。
- 前記原子堆積法は、成膜用のガスとしてオゾンと水素を用いる請求項1ないし請求項4いずれか一項記載のパターン形成方法。
- 前記原子堆積法は、水素プラズマを用いる請求項1ないし請求項4いずれか一項記載のパターン形成方法。
- 前記ブロック共重合体層を形成する前に、前記基板の上に、第1の方向に伸長する第1の領域と、前記第1の領域よりも低い表面エネルギーを有し前記第1の方向に伸長する第2の領域とが交互に配列するガイド層を形成し、
前記ガイド層の上に前記ブロック共重合体層を形成し、
前記熱処理により、前記ブロック共重合体層を前記第1の方向に伸長する前記第1の相と前記第1の方向に伸長する前記第2の相が交互に配列するよう相分離させる請求項1ないし請求項6いずれか一項記載のパターン形成方法。 - 前記ブロック共重合体層を形成する前に、開口部を有したガイド層を形成し、
前記開口部内に前記ブロック共重合体層を形成し、
前記熱処理により、前記ブロック共重合体層を前記第1の相と、前記第1の相に囲まれる前記第2の相に相分離させる請求項1ないし請求項6いずれか一項記載のパターン形成方法。 - 前記第1の相をマスクに、前記基板をエッチングする請求項1記載のパターン形成方法。
- 基板の上に、第1の重合体と、前記第1の重合体より低い表面エネルギーを有する第2の重合体とを含むブロック共重合体層を形成し、
前記ブロック共重合体層を熱処理し、前記ブロック共重合体層を、前記第1の重合体を含む第1の相と、前記第2の重合体を含む第2の相とに相分離させ、
原子堆積法を用いて、前記第1の相の上に選択的に酸化物層を形成し、且つ、前記第2の相を選択的に除去するパターン形成方法。 - 前記第2の相を除去した領域に金属層を形成する請求項10記載のパターン形成方法。
- 前記第1の重合体は、側鎖にヒドロキシル基、カルボキシル基、アミノ基、アミド基、イソシアネート基、ピリジン環の群から選ばれる官能基を含み、前記第2の重合体は、側鎖にヒドロキシル基、カルボキシル基、アミノ基、アミド基、イソシアネート基、ピリジン環の群から選ばれる官能基を含まない請求項10又は請求項11記載のパターン形成方法。
- 前記ブロック共重合体層は、ポリスチレン誘導体とポリメタクリレート誘導体、ポリスチレン誘導体とポリアクリレート誘導体、ポリメタクリレート誘導体とポリアクリレート誘導体、ポリスチレン誘導体とポリスチレン誘導体、ポリメタクリレート誘導体とポリメタクリレート誘導体、ポリアクリレート誘導体とポリアクリレート誘導体のいずれかの組み合わせから構成される請求項10ないし請求項12いずれか一項記載のパターン形成方法。
- 前記原子堆積法は、酸化剤としてオゾンを用いる請求項10ないし請求項13いずれか一項記載のパターン形成方法。
- 前記原子堆積法は、酸素プラズマを用いる請求項10ないし請求項13いずれか一項記載のパターン形成方法。
- 前記ブロック共重合体層を形成する前に、前記基板の上に、第1の方向に伸長する第1の領域と、前記第1の領域よりも低い表面エネルギーを有し前記第1の方向に伸長する第2の領域とが交互に配列するガイド層を形成し、
前記ガイド層の上に前記ブロック共重合体層を形成し、
前記熱処理により、前記ブロック共重合体層を前記第1の方向に伸長する前記第1の相と前記第1の方向に伸長する前記第2の相が交互に配列するよう相分離させる請求項10ないし請求項15いずれか一項記載のパターン形成方法。 - 前記ブロック共重合体層を形成する前に、開口部を有したガイド層を形成し、
前記開口部内に前記ブロック共重合体層を形成し、
前記熱処理により、前記ブロック共重合体層を前記第1の相と、前記第1の相に囲まれる前記第2の相に相分離させる請求項10ないし請求項15いずれか一項記載のパターン形成方法。 - 前記第1の相をマスクに、前記基板をエッチングする請求項10記載のパターン形成方法。
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