JP7025422B2 - 重合体、有機膜組成物およびパターン形成方法 - Google Patents
重合体、有機膜組成物およびパターン形成方法 Download PDFInfo
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- JP7025422B2 JP7025422B2 JP2019524024A JP2019524024A JP7025422B2 JP 7025422 B2 JP7025422 B2 JP 7025422B2 JP 2019524024 A JP2019524024 A JP 2019524024A JP 2019524024 A JP2019524024 A JP 2019524024A JP 7025422 B2 JP7025422 B2 JP 7025422B2
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/34—Condensation polymers of aldehydes or ketones with monomers covered by at least two of the groups C09D161/04, C09D161/18 and C09D161/20
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Description
A1は、下記の化学式Xで表されるモイエティ(moiety)であり、
A2は、置換または非置換のC6~C30の芳香族環であり、前記A1と異なる構造を有し、
B1およびB2は、それぞれ独立して、置換または非置換のC6~C30の芳香族環であり、
*は、連結地点である:
Arは、置換もしくは非置換の4員環、置換もしくは非置換の5員環、置換もしくは非置換の6員環、またはこれらの縮合環(fused ring)であり、
Raは、水素原子、ヒドロキシ基、ハロゲン基、置換もしくは非置換のC1~C30アルコキシ基、置換もしくは非置換のC1~C30アルキル基、置換もしくは非置換のC2~C30アルケニル基、置換もしくは非置換のC2~C30アルキニル基、置換もしくは非置換のC6~C30アリール基、置換もしくは非置換のC1~C30ヘテロアルキル基、置換もしくは非置換のC2~C30ヘテロアリール基、またはこれらの組み合わせであり、
Zaは、それぞれ独立して、ヒドロキシ基、ハロゲン基、置換もしくは非置換のC1~C30アルコキシ基、置換もしくは非置換のC1~C30アルキル基、置換もしくは非置換のC2~C30アルケニル基、置換もしくは非置換のC2~C30アルキニル基、置換もしくは非置換のC6~C30アリール基、置換もしくは非置換のC1~C30ヘテロアルキル基、置換もしくは非置換のC2~C30ヘテロアリール基、またはこれらの組み合わせであり、
mは、0または1である。
R1およびR2は、それぞれ独立して、水素原子、ヒドロキシ基、ハロゲン基、置換もしくは非置換のC1~C30アルコキシ基、置換もしくは非置換のC1~C30アルキル基、置換もしくは非置換のC2~C30アルケニル基、置換もしくは非置換のC2~C30アルキニル基、置換もしくは非置換のC6~C30アリール基、置換もしくは非置換のC1~C30ヘテロアルキル基、置換もしくは非置換のC2~C30ヘテロアリール基、またはこれらの組み合わせである:
ただし、前記グループ2において、各モイエティ(moiety)内の水素原子は、それぞれ独立して、ヒドロキシ基、ハロゲン基、置換もしくは非置換のC1~C30アルコキシ基、置換もしくは非置換のC1~C30アルキル基、置換もしくは非置換のC2~C30アルケニル基、置換もしくは非置換のC2~C30アルキニル基、置換もしくは非置換のC6~C30アリール基、置換もしくは非置換のC1~C30ヘテロアルキル基、置換もしくは非置換のC2~C30ヘテロアリール基、またはこれらの組み合わせで置換もしくは非置換されたものである。
A1は、下記の化学式Xで表されるモイエティ(moiety)であり、
A2は、置換または非置換のC6~C30芳香族環であり、前記A1と異なる構造を有し、
B1およびB2は、それぞれ独立して、置換または非置換のC6~C30の芳香族環であり、
*は、連結地点である:
Arは、置換もしくは非置換の4員環、置換もしくは非置換の5員環、置換もしくは非置換の6員環、またはこれらの縮合環(fused ring)であり、
Raは、水素原子、ヒドロキシ基、ハロゲン基、置換もしくは非置換のC1~C30アルコキシ基、置換もしくは非置換のC1~C30アルキル基、置換もしくは非置換のC2~C30アルケニル基、置換もしくは非置換のC2~C30アルキニル基、置換もしくは非置換のC6~C30アリール基、置換もしくは非置換のC1~C30ヘテロアルキル基、置換もしくは非置換のC2~C30ヘテロアリール基、またはこれらの組み合わせであり、
Zaは、それぞれ独立して、ヒドロキシ基、ハロゲン基、置換もしくは非置換のC1~C30アルコキシ基、置換もしくは非置換のC1~C30アルキル基、置換もしくは非置換のC2~C30アルケニル基、置換もしくは非置換のC2~C30アルキニル基、置換もしくは非置換のC6~C30アリール基、置換もしくは非置換のC1~C30ヘテロアルキル基、置換もしくは非置換のC2~C30ヘテロアリール基、またはこれらの組み合わせであり、
mは、0または1である。
R1およびR2は、それぞれ独立して、水素原子、ヒドロキシ基、ハロゲン基、置換もしくは非置換のC1~C30アルコキシ基、置換もしくは非置換のC1~C30アルキル基、置換もしくは非置換のC2~C30アルケニル基、置換もしくは非置換のC2~C30アルキニル基、置換もしくは非置換のC6~C30アリール基、置換もしくは非置換のC1~C30ヘテロアルキル基、置換もしくは非置換のC2~C30ヘテロアリール基、またはこれらの組み合わせである:
ただし、前記グループ2において、各モイエティ(moiety)内の水素原子は、それぞれ独立して、ヒドロキシ基、ハロゲン基、置換もしくは非置換のC1~C30アルコキシ基、置換もしくは非置換のC1~C30アルキル基、置換もしくは非置換のC2~C30アルケニル基、置換もしくは非置換のC2~C30アルキニル基、置換もしくは非置換のC6~C30アリール基、置換もしくは非置換のC1~C30ヘテロアルキル基、置換もしくは非置換のC2~C30ヘテロアリール基、またはこれらの組み合わせで置換または非置換されたものである。
合成例1
機械式攪拌機と冷却管を備えた500mlの2つ口フラスコに、1-ナフトール(1-naphthol)61.5g(0.43モル)、インドール(Indole)50.0g(0.43モル)、1-ナフトアルデヒド(1-naphthaldehyde)133g(0.85モル)、およびメタンスルホン酸(Methanesulfonic acid)41.0g(0.43モル)を、285.9gの1,4-ジオキサン(1,4-Dioxane)に入れてよくかき混ぜた後、温度を100℃に上げて24時間攪拌した。反応終了後、内部温度を60~70℃に下げた後、テトラヒドロフラン300gを入れて化合物が固まらないようにした後に、7%の重炭酸ナトリウム水溶液(Sodium bicarbonate)で化合物のpHを5~6となるようにする。そして、酢酸エチル1000mlを注ぎ続けて攪拌した後、分別漏斗を用いて有機層のみを抽出する。再び水500mlを分別漏斗に入れて振って、残っている酸とナトリウム塩を除去する過程を3回以上繰り返した後、有機層を最終的に抽出する。次いで、有機溶液を蒸発器にて濃縮し、得られた化合物にテトラヒドロフラン1Lを添加して溶液を得た。
合成例1においてインドールの代わりに1H-ベンゾインドール(1H-Benzoindole)を用いたことを除き、同様の方法を使用して、化学式2aで表される構造単位を含む重合体を得た。
合成例1においてインドールの代わりに、1H,1H’-3,3’-ビインドール(1H,1H’-3,3’-biindole)を用いたことを除き、同様な方法を使用して、化学式3aで表される構造単位を含む重合体を得た。
合成例1において、インドールの代わりに1H-ジベンゾ[e,g]インドール(1H-dibenzo[e,g]indole)を用いたことを除き、同様の方法を使用して、化学式4aで表される構造単位を含む重合体を得た。
合成例1において、1-ナフトールの代わりにフェナントレン-9-オール(Phenanthren-9-ol)を用いたことを除き、同様な方法を使用して化学式5aで表される構造単位を含む重合体を得た。
合成例5において、1-ナフトアルデヒドの代わりに9-フェナントレンカルバルデヒド(9-phenanthrene carbaldehyde)を用いたことを除き、同様の方法を使用して、化学式6aで表される構造単位を含む重合体を得た。
合成例6において、フェナントレン-9-オールの代わりに1-ヒドロキシピレン(1-hydroxypyrene)を用い、9-フェナントレンカルバルデヒドの代わりにピレン-1-カルバルデヒド(Pyrene-1-carbaldehyde)を用いたことを除き、同様な方法を使用して化学式7aで表される構造単位を含む重合体を得た。
合成例7において、インドールの代わりに1H-ベンゾインドール(1H-Benzoindole)を用いたことを除き、同様の方法を使用して、化学式8aで表される構造単位を含む重合体を得た。
合成例7において、インドールの代わりに1-フェニル-1H-インドール(1-Phenyl-1H-indole)を用いたことを除き、同様の方法を使用して、化学式9aで表される構造単位を含む重合体を得た。
機械式攪拌機を備えた500mlの2つ口フラスコに、合成例1で得られた重合体27.0gとジメチルホルムアミド(Dimethylformamide)200gを入れて攪拌する。重合体が全部溶けたことを確認した後、フラスコを氷で満たされた冷却水槽に入れて攪拌する。その後、水素化ナトリウム(Sodium hydride)6gをゆっくりフラスコに滴加し攪拌する。攪拌30分後にプロパルギルブロミド(Propargyl bromide)17.8gをゆっくり投入し8時間攪拌した。反応終了後、フラスコ内にエタノール50mlをゆっくり投入し、10分経過後、2Lのビーカーに入れて攪拌している水1.5Lに反応液をゆっくり投入する。完全に投入した後、2時間攪拌を行う。沈殿が形成された固体をろ過して水分を除去した後、水500mlとエタノール200mlを混合した溶液で洗浄する過程を3回以上繰り返し、固体を乾燥して、化学式10aで表される構造単位を含む重合体を得た。
500mlのフラスコに、1-ヒドロキシアントラセン20g(0.103モル)、およびパラホルムアルデヒド3.08g(0.103モル)を順次入れてプロピレングリコールモノメチルエーテルアセテート(PGMEA)42gに溶かした後、パラトルエンスルホン酸0.4g(0.002モル)を投入し、90~120℃で5~10時間程度攪拌した。1時間間隔で前記重合反応物から試料を取って、その試料の重量平均分子量が3,000~4,200となった時点で反応を完了して、化学式Aで表される構造単位を含む重合体を得た。
500mlのフラスコに、インドール(Indole)33g(0.23モル)、1-ナフトアルデヒド(1-Naphthaldehyde)35.9g(0.23モル)を順次入れ、プロピレングリコールモノメチルエーテルアセテート(PGMEA)200gに溶かした後、パラトルエンスルホン酸1g(0.005モル)を投入した後、90~120℃で8時間程度攪拌した。1時間間隔で前記重合反応物から試料を取って、その試料の重量平均分子量が3,000~4,000となった時点で反応を完了して、化学式Bで表される構造単位を含む重合体を得た。
合成例1において、インドールの代わりにカルバゾールを用いたことを除き、同様の方法を使用して、化学式Cで表される構造単位を含む重合体を得た。
合成例4において、インドールの代わりに1,3-ジヒドロインドロ[2,3-b]カルバゾール(1,3-dihydroindolo[2,3-b]carbazole)を用いたことを除き、同様の方法を使用して、化学式Dで表される構造単位を含む重合体を得た。
実施例1
合成例1で得られた重合体を、プロピレングリコールモノメチルエーテルアセテート(propylene glycol monomethyl ether acetate、PGMEA)およびシクロヘキサノン(cyclohexanone)(7:3(v/v))の混合溶媒に溶かした後、0.1μmのテフロンフィルターでろ過して、ハードマスク組成物を製造した。目的とする厚さにより、前記重合体の重量は、前記ハードマスク組成物の総重量に対して5.0重量%~20.0重量%に調節した。
合成例1で得られた重合体の代わりに、合成例2で得られた化合物を使用したことを除き、実施例1と同様の方法で、ハードマスク組成物を製造した。
合成例1で得られた重合体の代わりに、合成例3で得られた化合物を使用したことを除き、実施例1と同様の方法で、ハードマスク組成物を製造した。
合成例1で得られた重合体の代わりに、合成例4で得られた化合物を使用したことを除き、実施例1と同様の方法で、ハードマスク組成物を製造した。
合成例1で得られた重合体の代わりに、合成例5で得られた化合物を使用したことを除き、実施例1と同様の方法で、ハードマスク組成物を製造した。
合成例1で得られた重合体の代わりに、合成例6で得られた化合物を使用したことを除き、実施例1と同様の方法で、ハードマスク組成物を製造した。
合成例1で得られた重合体の代わりに、合成例7で得られた化合物を使用したことを除き、実施例1と同様の方法で、ハードマスク組成物を製造した。
合成例1で得られた重合体の代わりに、合成例8で得られた化合物を使用したことを除き、実施例1と同様の方法で、ハードマスク組成物を製造した。
合成例1で得られた重合体の代わりに、合成例9で得られた化合物を使用したことを除き、実施例1と同様の方法で、ハードマスク組成物を製造した。
合成例1で得られた重合体の代わりに、合成例10で得られた化合物を使用したことを除き、実施例1と同様の方法で、ハードマスク組成物を製造した。
合成例1で得られた重合体の代わりに、比較合成例1で得られた化合物を使用したことを除き、実施例1と同様の方法で、ハードマスク組成物を製造した。
合成例1で得られた重合体の代わりに、比較合成例2で得られた化合物を使用したことを除き、実施例1と同様の方法で、ハードマスク組成物を製造した。
合成例1で得られた重合体の代わりに、比較合成例3で得られた化合物を使用したことを除き、実施例1と同様の方法で、ハードマスク組成物を製造した。
合成例1で得られた重合体の代わりに、比較合成例4で得られた化合物を使用したことを除き、実施例1と同様の方法で、ハードマスク組成物を製造した。
評価1:耐エッチング性
シリコンウエハーの上に、実施例1~10および比較例1~4のハードマスク組成物を4,000Å厚さにスピンオンコーティングした後、ホットプレートの上で、240℃で1分間熱処理して薄膜を形成した。
シリコンウエハーの上に、実施例1~10および比較例1~4のハードマスク組成物をスピンオンコーティングし、ホットプレートの上で、240℃で1分間熱処理して厚さ1,000Åの薄膜を形成した。
Claims (15)
- 下記の化学式1で表される構造単位と、
下記の化学式2で表される構造単位と、を含む、重合体:
前記化学式1および2において、
A1は、下記グループ2に列記されたモイエティ(moiety)のうちいずれか一つであり、
A2は、少なくとも一つのヒドロキシ基により置換された下記グループ1’に列記されたモイエティ(moiety)のうちいずれか一つであり、
B1およびB2は、それぞれ独立して、置換または非置換のC6~C30の芳香族環であり、
*は、連結地点である:
前記グループ2において、
R 1 およびR 2 は、それぞれ独立して、水素原子、置換もしくは非置換のC1~C30アルキル基、置換もしくは非置換のC2~C30アルキニル基、置換もしくは非置換のC6~C30アリール基、またはこれらの組み合わせである:
ただし、前記グループ2において、各モイエティ(moiety)内の水素原子は、それぞれ独立して、ヒドロキシ基、ハロゲン基、置換もしくは非置換のC1~C30アルコキシ基、置換もしくは非置換のC1~C30アルキル基、置換もしくは非置換のC2~C30アルケニル基、置換もしくは非置換のC2~C30アルキニル基、置換もしくは非置換のC6~C30アリール基、置換もしくは非置換のC1~C30ヘテロアルキル基、置換もしくは非置換のC2~C30ヘテロアリール基、またはこれらの組み合わせで置換もしくは非置換されたものである。
- 前記化学式1および2において、B1およびB2は、置換または非置換のC6~C30芳香族環であり、互いに同じ構造を有する、請求項1または2に記載の重合体。
- 重量平均分子量が1,000~200,000である、請求項1~3のいずれか1項に記載の重合体。
- 下記の化学式1で表される構造単位、および下記の化学式2で表される構造単位を含む重合体と、
溶媒と、を含む、有機膜組成物:
前記化学式1および2において、
A1は、下記グループ2に列記されたモイエティ(moiety)のうちいずれか一つであり、
A2は、少なくとも一つのヒドロキシ基により置換された下記グループ1’に列記されたモイエティ(moiety)のうちいずれか一つであり、
B1およびB2は、それぞれ独立して、置換または非置換のC6~C30の芳香族環であり、
*は、連結地点である:
前記グループ2において、
R 1 およびR 2 は、それぞれ独立して、水素原子、置換もしくは非置換のC1~C30アルキル基、置換もしくは非置換のC2~C30アルキニル基、置換もしくは非置換のC6~C30アリール基、またはこれらの組み合わせである:
ただし、前記グループ2において、各モイエティ(moiety)内の水素原子は、それぞれ独立して、ヒドロキシ基、ハロゲン基、置換もしくは非置換のC1~C30アルコキシ基、置換もしくは非置換のC1~C30アルキル基、置換もしくは非置換のC2~C30アルケニル基、置換もしくは非置換のC2~C30アルキニル基、置換もしくは非置換のC6~C30アリール基、置換もしくは非置換のC1~C30ヘテロアルキル基、置換もしくは非置換のC2~C30ヘテロアリール基、またはこれらの組み合わせで置換もしくは非置換されたものである。
- 前記化学式1および2において、B1およびB2は、置換または非置換のC6~C30芳香族環であり、互いに同じ構造を有する、請求項5に記載の有機膜組成物。
- 前記重合体の重量平均分子量が1,000~200,000である、請求項5または6に記載の有機膜組成物。
- 前記重合体は、前記有機膜組成物の総量に対して、0.1重量%~30重量%で含まれる、請求項5~7のいずれか1項に記載の有機膜組成物。
- 下記の化学式1で表される構造単位と、
下記の化学式2で表される構造単位と、を含む、重合体:
前記化学式1および2において、
A1は、下記の化学式Xで表されるモイエティ(moiety)であり、
A2は、置換または非置換のC6~C30の芳香族環であり、前記A1と異なる構造を有し、B1およびB2は、それぞれ独立して、下記化学式11で表される芳香族環であり、
*は、連結地点である:
前記化学式Xにおいて、
Arは、置換もしくは非置換の6員環、またはC14以下の縮合環(fused ring)であり、
Raは、水素原子、置換もしくは非置換のC1~C30アルキル基、置換もしくは非置換のC2~C30アルキニル基、置換もしくは非置換のC6~C30アリール基、またはこれらの組み合わせであり、
Zaは、置換または非置換のインドリル基であり、
mは、0または1である。 - 下記の化学式1で表される構造単位と、
下記の化学式2で表される構造単位と、を含む、重合体:
前記化学式1および2において、
A1は、下記の化学式Xで表されるモイエティ(moiety)であり、
A2は、下記化学式11で表されるモイエティであり、
B1およびB2は、それぞれ独立して、置換または非置換のC6~C30の芳香族環であり、
*は、連結地点である:
前記化学式Xにおいて、
Arは、置換もしくは非置換の6員環、またはC14以下の縮合環(fused ring)であり、
Raは、水素原子、置換もしくは非置換のC1~C30アルキル基、置換もしくは非置換のC2~C30アルキニル基、置換もしくは非置換のC6~C30アリール基、またはこれらの組み合わせであり、
Zaは、置換または非置換のインドリル基であり、
mは、0または1である。 - 下記の化学式1で表される構造単位と、下記の化学式2で表される構造単位と、を含む、重合体と、
溶媒と、を含む、有機膜組成物:
前記化学式1および2において、
A1は、下記の化学式Xで表されるモイエティ(moiety)であり、
A2は、置換または非置換のC6~C30の芳香族環であり、前記A1と異なる構造を有し、B1およびB2は、それぞれ独立して、下記化学式11で表される芳香族環であり、
*は、連結地点である:
前記化学式Xにおいて、
Arは、置換もしくは非置換の6員環、またはC14以下の縮合環(fused ring)であり、
Raは、水素原子、置換もしくは非置換のC1~C30アルキル基、置換もしくは非置換のC2~C30アルキニル基、置換もしくは非置換のC6~C30アリール基、またはこれらの組み合わせであり、
Zaは、置換または非置換のインドリル基であり、
mは、0または1である。 - 下記の化学式1で表される構造単位と、下記の化学式2で表される構造単位と、を含む、重合体と、
溶媒と、を含む、有機膜組成物:
前記化学式1および2において、
A1は、下記の化学式Xで表されるモイエティ(moiety)であり、
A2は、下記化学式11で表されるモイエティであり、
B1およびB2は、それぞれ独立して、置換または非置換のC6~C30の芳香族環であり、
*は、連結地点である:
前記化学式Xにおいて、
Arは、置換もしくは非置換の6員環、またはC14以下の縮合環(fused ring)であり、
Raは、水素原子、置換もしくは非置換のC1~C30アルキル基、置換もしくは非置換のC2~C30アルキニル基、置換もしくは非置換のC6~C30アリール基、またはこれらの組み合わせであり、
Zaは、置換または非置換のインドリル基であり、
mは、0または1である。 - 基板上に材料層を提供する段階と、
前記材料層の上に請求項5~8、および請求項11~12のいずれか1項に記載の有機膜組成物を適用する段階と、
前記有機膜組成物を熱処理してハードマスク層を形成する段階と、
前記ハードマスク層の上にシリコン含有薄膜層を形成する段階と、
前記シリコン含有薄膜層の上にフォトレジスト層を形成する段階と、
前記フォトレジスト層を露光および現像してフォトレジストパターンを形成する段階と、
前記フォトレジストパターンを用いて前記シリコン含有薄膜層および前記ハードマスク層を選択的に除去し、前記材料層の一部を露出する段階と、
前記材料層の露出した部分をエッチングする段階と、を含む、パターン形成方法。 - 前記有機膜組成物を適用する段階は、スピンオンコーティング法で行う、請求項13に記載のパターン形成方法。
- 前記フォトレジスト層を形成する段階の前に、底面反射防止層(BARC)を形成する段階をさらに含む、請求項13または14に記載のパターン形成方法。
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