JP7115295B2 - (メタ)アクリレート化合物、重合体、レジスト材料及び(メタ)アクリレート化合物の製造方法 - Google Patents
(メタ)アクリレート化合物、重合体、レジスト材料及び(メタ)アクリレート化合物の製造方法 Download PDFInfo
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Description
下記一般式(1)で表される。
こととしてもよい。
下記一般式(1a)で表される繰り返し単位を含有し、
重量平均分子量が2,000~100,000である。
こととしてもよい。
上記本発明の第2の観点に係る重合体と、
酸発生剤と、
有機溶剤と、
を含む。
下記一般式(2)で表される3-ヒドロキシ-シクロブタン-1-オンをエステル化するステップを含む。
本実施の形態に係る(メタ)アクリレート化合物は、シクロブタノン構造を有する。当該(メタ)アクリレート化合物は上記の一般式(1)で表される。例えば、(メタ)アクリレート化合物は、以下説明する2段階の合成法で製造できる。なお、(メタ)アクリレートとは、アクリレート又はメタクリレートを表す。
本実施の形態に係るレジスト材料は、上記実施の形態1に係る重合体と、酸発生剤と、有機溶剤と、を含む。酸発生剤としては、光酸発生剤及び熱酸発生剤等が使用できる。光酸発生剤は、光を照射されることにより酸を発生する化合物であればよく、好ましくは、300nm以下の高エネルギー線又は電子線の照射により酸を発生する化合物である。当該光酸発生剤と上記実施の形態1に係る重合体と、有機溶剤と、を含むレジスト材料が均一溶液で、均一な塗布、製膜が可能であれば、いかなる酸発生剤でもよい。
Mw及びMnは、次のようにゲルパーミエーションクロマトグラフィ(GPC)分析で決定した。GPCカラム(東ソー社製、G2000HXL:2本及びG4000HXL:2本)を用い、流量:1.0mL/分、溶出溶媒:テトラヒドロフラン、試料濃度:0.3質量%、試料注入量:50μL、カラム温度:40℃、検出器:示差屈折計の分析条件で、単分散ポリスチレンを標準とするGPCにより各重合体のMw及びMnを測定した。各重合体のMw/Mnは、Mw及びMnの測定結果より算出した。
各重合体における各構造単位の含有割合(mol%)は、JNM-ECP400(日本電子社製)を用い、測定溶媒として重クロロホルムを使用した13C-NMR分析により求めた。
以下の工程I~IIIにより、2,2,4,4-テトラメチル-3-オキソシクロブチルメタクリレートを合成した。
2,2,4,4-テトラメチルシクロブタン-1,3-ジオン(150g,1.1mol)をメタノール(1500g)に溶解させ-30℃に冷却した。水素化ホウ素ナトリウム(10.2g、0.27mol)を少しずつ加えた。反応終了後、反応混合物に濃塩酸(28.8g)を加えた。続いて減圧濃縮することにより、3-ヒドロキシ-2,2,4,4-テトラメチルシクロブタン-1-オンの粗体を得た。
工程Iで得た3-ヒドロキシ-2,2,4,4-テトラメチルシクロブタン-1-オンの粗体をトルエン(450ml)に溶解させ、不溶物をろ過後、-10℃に冷却し、ヘプタン(250ml)を加えた。析出した結晶を吸引ろ過で集めることにより無色固体(123g、0.86mol)を得た。
工程IIで得た3-ヒドロキシ-2,2,4,4-テトラメチルシクロブタン-1-オン(150g,1.1mol)、メタクリル酸無水物(212g,1.4mol)及びIrganox1076(0.21g)を酢酸エチル(1350g)に溶解させ40℃に加温し、トリエチルアミン(145g,1.4mol)を滴下した。混合物を40℃に保ったまま5時間撹拌した。反応液をGCで分析したところ、反応転化率98.7%であった。
実施例1及び比較例1、2の重合体それぞれについて、重合体0.50g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5.0gと混合して、重合体濃度14重量%の溶液を調製した。実施例1の重合体は、プロピレングリコールモノメチルエーテルアセテートに完全に溶解した。一方、比較例1の重合体及び比較例2の重合体は、プロピレングリコールモノメチルエーテルアセテートに完全には溶解しなかった。
実施例1の重合体0.50gをシクロペンタノン3.0gに溶解したのち、0.2μmのテフロン(登録商標)フィルターを用いて濾過した。得られた溶液を石英基板上にNo.36のバーコーターを用いて塗布し、ホットプレートで90℃、180秒間の熱処理を施して、膜厚10μmの薄膜を形成した。比較例1及び比較例2についても同様にバーコーターを用いて、それぞれ膜厚10μm及び9μmの薄膜を形成した。これら薄膜について、ヘーズメーター(日本電色工業株式会社製、NDH4000)を用いてヘーズ値を測定した。なお、ヘーズ値が低いほど、分子間或いは分子内での組成分布が小さく、ランダム性の高い共重合体であることを示す。
実施例1及び比較例1、2の重合体それぞれについて、上記と同様に薄膜を形成した。当該薄膜について、紫外可視分光光度計を用いて193nmにおける1μmあたりの透過率を測定した。
Claims (6)
- 下記一般式(1)で表される(メタ)アクリレート化合物。
- 前記一般式(1)中、R1及び/又はR2が水素又はメチル基であり、同一の炭素に結合した2個のR3の炭素同士が結合しない場合のR3 が塩素、メチル基、エチル基又は4-ヒドロキシシクロヘキシル基であり、同一の炭素に結合した2個のR3の炭素同士が結合して環を形成する場合の環が前記同一の炭素をスピロ原子とするシクロペンチル又はシクロヘキシルである、
請求項1に記載の(メタ)アクリレート化合物。 - 下記一般式(1a)で表される繰り返し単位を含有し、
重量平均分子量が2,000~100,000である、
(メタ)アクリレート化合物の重合体。
- 前記繰り返し単位のモル分率が少なくとも5%である、
請求項3に記載の重合体。 - 請求項3又は4に記載の重合体と、
酸発生剤と、
有機溶剤と、
を含む、レジスト材料。 - 下記一般式(2)で表される3-ヒドロキシ-シクロブタン-1-オンをエステル化するステップを含む、
請求項1又は2に記載の(メタ)アクリレート化合物、の製造方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2018240956A JP7115295B2 (ja) | 2018-12-25 | 2018-12-25 | (メタ)アクリレート化合物、重合体、レジスト材料及び(メタ)アクリレート化合物の製造方法 |
US16/719,921 US11021433B2 (en) | 2018-12-25 | 2019-12-18 | (Meth)acrylate compound, polymer, resist material, and method for producing (meth)acrylate compound |
KR1020190170952A KR20200079432A (ko) | 2018-12-25 | 2019-12-19 | (메타)아크릴레이트 화합물, 중합체, 레지스트 재료 및 (메타)아크릴레이트 화합물의 제조 방법 |
CN201911317769.5A CN111377818A (zh) | 2018-12-25 | 2019-12-19 | (甲基)丙烯酸酯化合物、聚合物、抗蚀剂材料及(甲基)丙烯酸酯化合物的制造方法 |
TW108147090A TW202024016A (zh) | 2018-12-25 | 2019-12-20 | (甲基)丙烯酸酯化合物、聚合物、抗蝕劑材料及(甲基)丙烯酸酯化合物的製造方法 |
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