JP6333050B2 - 化合物、光硬化性組成物、硬化物、これを用いた、パターン形状を有する膜の製造方法、光学部品の製造方法、回路基板の製造方法、電子部品の製造方法 - Google Patents
化合物、光硬化性組成物、硬化物、これを用いた、パターン形状を有する膜の製造方法、光学部品の製造方法、回路基板の製造方法、電子部品の製造方法 Download PDFInfo
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- JP6333050B2 JP6333050B2 JP2014096145A JP2014096145A JP6333050B2 JP 6333050 B2 JP6333050 B2 JP 6333050B2 JP 2014096145 A JP2014096145 A JP 2014096145A JP 2014096145 A JP2014096145 A JP 2014096145A JP 6333050 B2 JP6333050 B2 JP 6333050B2
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- ODHXBMXNKOYIBV-UHFFFAOYSA-N triphenylamine Chemical compound C1=CC=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 ODHXBMXNKOYIBV-UHFFFAOYSA-N 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000001018 xanthene dye Substances 0.000 description 1
- 150000007964 xanthones Chemical class 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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Description
(A)重合性化合物
(B)光重合開始剤
(C)下記一般式(1)に示される水素供与体
成分(A)は重合性化合物である。ここで、本実施形態および本発明において、重合性化合物とは、光重合開始剤(後述する成分(B))から発生した重合因子(ラジカル等)と反応し、連鎖反応(重合反応)によって高分子化合物からなる膜を形成する化合物である。
成分(B)は、光重合開始剤である。
成分(C)は、水素供与体である。
−(OCH2CH2)a−
(aは、1以上100以下の整数である。)
−(OCH2CH(CH3))b−
(bは、1以上100以下の整数である。)
Rf1−Rc−X
(一般式(9)において、Rf1は、フッ素原子及び炭素原子のみで構成される基、または、フッ素原子及び炭素原子及び水素原子のみで構成される基であり、Rcは、ポリエチレンオキサイド基、ポリプロピレンオキサイド基およびアルキレン基のうちの少なくとも一つで構成される基であり、Xはアミノ基である。)
本実施形態の光硬化性組成物は、前述した、成分(A)、成分(B)、成分(C)の他に、種々の目的に応じ、本発明の効果を損なわない範囲で、更なる添加成分を含有していてもよい。このような添加成分としては、離型剤、界面活性剤、増感剤、酸化防止剤、溶剤、ポリマー成分等が挙げられる。
本実施形態の光硬化性組成物を調製する際には、少なくとも成分(A)、成分(B)、成分(C)を所定の温度条件下で混合・溶解させる。具体的には、0℃以上100℃以下の範囲で行う。
本実施形態の光硬化性組成物の粘度は、溶剤を除く成分の混合物について23℃での粘度が、好ましくは、1cP以上100cP以下であり、より好ましくは、5cP以上50cP以下であり、さらに好ましくは、6cP以上20cP以下である。
本実施形態の光硬化性組成物の表面張力は、溶剤を除く成分の混合物について23℃での表面張力が、好ましくは、5mN/m以上70mN/m以下であり、より好ましくは、7mN/m以上35mN/m以下であり、さらに好ましくは、10mN/m以上32mN/m以下である。ここで、表面張力が5mN/mより低いと、光硬化性組成物をモールドに接触させる際にモールド上の微細パターンのうち凹部に組成物が充填するのに長い時間が必要となることがある。一方、表面張力が70mN/mより高いと、表面平滑性が低くなることがある。
本実施形態の光硬化性組成物は、できる限り不純物を含まないことが好ましい。ここで記載する不純物とは、前述した成分(A)、成分(B)、成分(C)および添加成分以外のものを意味する。
[1]基板上に、前述の本実施形態の光硬化性組成物を配置する配置工程と、
[2]前記光硬化性組成物とモールドとを接触させる型接触工程と、
[3]前記光硬化性組成物に光を照射する光照射工程と、
[4][3]の工程によって得られた硬化物とモールドとを引き離す離型工程と、
を有する。
本工程(配置工程)では、図1(a)に示す通り、前述した本実施形態の光硬化性組成物1を基板2上に配置(塗布)して塗布膜を形成する。
次に、図1(b)に示すように、前工程(配置工程)で形成された光硬化性組成物1からなる塗布膜にパターン形状を転写するための原型パターンを有するモールドを接触させる。本工程で、光硬化性組成物1(被形状転写層)にモールド3を接触させる(図1(b−1))ことにより、モールド3が表面に有する微細パターンの凹部に光硬化性組成物1からなる塗布膜(の一部)が充填されて、モールドの微細パターンに充填された塗布膜4となる(図1(b−2))。
次に、図1(c)に示すように、光硬化性組成物の前記モールドとの接触部分に、より詳細には、モールドの微細パターンに充填された塗布膜4に、モールド3を介して光を照射する(図1(c−1))。これにより、モールドの微細パターンに充填された塗布膜4は、照射される光によって硬化して硬化膜6となる(図1(c−2))。
次に、硬化膜6とモールド3と引き離し、基板2上に所定のパターン形状を有する硬化膜7を形成する。
工程[4]である離型工程により得られる硬化膜は、特定のパターン形状を有するものの、このパターン形状が形成される領域以外の領域においても膜の一部が残る場合がある(以降の記載において、このような膜の一部を残膜と呼ぶ場合がある)。そのような場合は、図1(e)に示すように、得られたパターン形状を有する硬化膜のうちの除去すべき領域にある硬化膜(残膜)を除去して所望の凹凸パターン形状(モールド3の凹凸形状に因むパターン形状)を有する硬化物パターン8を得ることができる。
本実施形態のパターン形状を有する膜の製造方法によって得られる、凹凸パターン形状を有する硬化物パターン8は、例えば、LSI、システムLSI、DRAM、SDRAM、RDRAM、D−RDRAM等の半導体素子に代表される電子部品に含まれる層間絶縁膜用膜として利用することも可能であり、半導体素子製造時におけるレジスト膜として利用することも可能である。
(1)光硬化性組成物(a−1)の調整
まず、下記に示される成分(A)、成分(B)、成分(C)、及び界面活性剤成分を配合して光硬化性組成物を調整した。
<A−1>イソボルニルアクリレート(共栄社化学製、商品名:IB−XA):61.6重量部
<A−2>(2−メチル−2−エチル−1,3−ジオキソラン−4−イル)メチルアクリレート(大阪有機化学工業製、商品名:MEDOL−10):10重量部
<A−3>ヘキサンジオールジアクリレート(大阪有機化学工業製、商品名:ビスコート#230):22.4重量部
(1−2)成分(B):合計3重量部
<B−1>Irgacure651(BASF製):3重量部
(1−3)成分(C):下記式(C−1)に示される水素供与体NIT−34 0.5重量部
調製した光硬化性組成物(a−1)を約10μLとり、これを減衰全反射赤外分光装置上のダイヤモンドATR結晶上に滴下して塗布膜を形成した。次に、厚さ1mmの石英ガラスを、光硬化性組成物(a−1)の塗布膜上にかぶせた。
次に、下記に示される方法により、離型力を測定した。
インクジェット法により、密着層として厚さ3nmの密着促進層が形成された300mmシリコンウエハ上に、光硬化性組成物(a−1)の液滴(液滴1個当たり11pL)を合計1440滴滴下した。尚、各液滴をそれぞれ滴下する際に、縦26mm、横33mmの領域に各液滴の間隔がほぼ均等になるように滴下した。
次に、上記シリコンウエハ上の光硬化性組成物(a−1)に対して、28nmライン・アンド・スペース(L/S)パターンが形成され、表面処理はされていない石英モールド(縦26mm、横33mm)を接触させた。
次に、石英モールドを、0.5mm/sの条件で引き上げて光硬化膜からモールドを離した。引張圧縮両用型小型ロードセル(LUR−A−200NSA1、共和電業製)を用いて、離型に要した力を測定した。実際に測定を行なう際は、同一条件で離型力測定を3回行い、各回の測定データから平均値を算出した。測定の結果、平均離型力は59.0Nであり、後述する比較例1にて光硬化性組成物(b−1)から作製した光硬化物よりも低い値であった。
実施例1において、(C)成分(水素供与体)を添加しなかったこと以外は、実施例1と同様の方法により光硬化性組成物(b−1)を調製した。
実施例1において、(C)成分(水素供与体)に変えて、公知の水素供与体N−フェニルグリシンを0.5重量部添加したこと以外は、実施例1と同様の方法により光硬化性組成物(b−2)を調製した。
Claims (15)
- 前記一般式(5)における、前記bが、1以上5以下の整数から選ばれることを特徴とする請求項1に記載の化合物。
- 重合性化合物と、光重合開始剤と、請求項1または2に記載の化合物と、を有する光硬化性組成物。
- 光ナノインプリント用組成物であることを特徴とする請求項3に記載の光硬化性組成物。
- 請求項3または4に記載の光硬化性組成物を硬化した硬化物。
- 基板上に、請求項3または4に記載の光硬化性組成物を配置する配置工程と、前記光硬化性組成物とパターン形状を転写するための原型パターンを有するモールドとを接触させる型接触工程と、
前記光硬化性組成物に光を照射して硬化膜とする光照射工程と、
前記硬化膜と前記モールドとを引き離す離型工程と、
を有することを特徴とするパターン形状を有する膜の製造方法。 - 前記モールドの原型パターンの表面がヒドロキシル基を有することを特徴とする請求項6に記載のパターン形状を有する膜の製造方法。
- 前記モールドの原型パターンの表面が石英であることを特徴とする請求項6または7に記載のパターン形状を有する膜の製造方法。
- 前記型接触工程が、凝縮性ガスを含む気体の雰囲気下で行われることを特徴とする請求項6〜8のいずれか一項に記載のパターン形状を有する膜の製造方法。
- 前記凝縮性ガスを含む気体が、ヘリウムと凝縮性ガスとの混合気体であることを特徴とする請求項9に記載のパターン形状を有する膜の製造方法。
- 前記凝縮性ガスが、1,1,1,3,3−ペンタフルオロプロパンであることを特徴とする請求項9または10に記載のパターン形状を有する膜の製造方法。
- 請求項6〜11のいずれか一項に記載のパターン形状を有する膜の製造方法により、基板上にパターン形状を有する膜を得る工程を有することを特徴とする光学部品の製造方法。
- 請求項6〜11のいずれか一項に記載のパターン形状を有する膜の製造方法によりパターン形状を有する膜を得る工程と、得られた膜のパターン形状をマスクとして基板にエッチング又はイオン注入を行う工程と、を有することを特徴とする光学部品の製造方法。
- 請求項6〜11のいずれか一項に記載のパターン形状を有する膜の製造方法によりパターン形状を有する膜を得る工程と、得られた膜のパターン形状をマスクとして基板にエッチング又はイオン注入を行う工程と、前記基板に電子部材を形成する工程と、を有することを特徴とする回路基板の製造方法。
- 請求項14に記載の回路基板の製造方法により回路基板を得る工程と、前記回路基板と前記回路基板を制御する制御機構とを接続する工程と、を有することを特徴とする電子部品の製造方法。
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