JP2013010956A - ポリマー組成物およびこれを含むフォトレジスト - Google Patents
ポリマー組成物およびこれを含むフォトレジスト Download PDFInfo
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Abstract
Description
本明細書において開示されるのは狭い多分散度(例えば、Mw/Mn<2.0)の(メタ)アクリラートベースのポリマーであり、これは重合性(メタ)アクリラートモノマーとして導入されてかつこのポリマー鎖に結合したイオン性光酸発生剤(PAG)を含む。このPAGは好ましくは結合基(tethering group)によってアニオンに結合される。このポリマーは、塩基反応性官能基、例えば、カルボン酸基などをマスクする高活性化エネルギー(Ea)酸感受性保護基(場合によっては本明細書において「脱離基」と称される)を有するモノマー;塩基可溶性基、例えば、ヘキサフルオロイソプロパノール基、フェノール系OHなどを有するモノマー;並びにラクトン含有モノマーをさらに含む。
1,1−ジフルオロ−2−(メタクリロイルオキシ)エタン−1−スルホン酸トリエチルアンモニウム(4.00g、12.1mmol)および臭化フェニルジベンゾチオフェニウム(4.50g、31.2mmol)が、30mLのジクロロメタンおよび30mLの蒸留脱イオン水と共に、100mL丸底フラスコに入れられた。この混合物は激しく一晩攪拌された。攪拌が停止させられ、この混合物は2つの透明な層に別れ、有機相は30mLの1%塩酸水溶液で2回洗浄され、そして30mLの蒸留脱イオン水で5回洗浄された。ヒドロキノン(1mg)が添加され、ロータリーエバポレーションによってジクロロメタンが除かれ、固体として生成物を得た(3.9g、80%収率)。1H NMR(500MHz、CDCl3)δ8.2(m,4H)、7.8(t,2H)、7.7(d,2H)、7.6(m,3H)、7.5(t,2H)、6.2(s,1H)、5.6(s,1H)、4.9(m,2H)、1.9(s,3H)。19F NMR(300MHz、アセトン−d6)δ−115.8(s,2F)。
248nm(DUV)および13.4nm(EUV)波長でのリソグラフィデータを得るために、以下の表1に示される組成物について、配合物実施例1および2(CEx1および2)並びに配合物比較例1〜3(CFEx1〜3)が準備された。
ポリマー、0.5または1重量%で乳酸エチル(EL)に溶かされたテトラヒドロキシイソプロピルエチレンジアミンクエンチャー溶液、乳酸エチルに溶かされた0.5重量%のOmnova(オムノバ)PF656界面活性剤(オムノバから入手可能)、並びに追加のELおよびメチル2−ヒドロキシブチラート(HBM)溶媒を表1に示された量で一緒にすることによって、ポジティブトーンフォトレジスト組成物が製造された。この配合された溶液は0.2μmPTFEフィルタを通された。
フォトスピードは248nm露光で得られた;クリアのための線量(ドース ツー クリア;dose to clear)値(E0)(ミリジュール/平方センチメートル、mJ/cm2)は表2に示される。現像後の未露光膜厚さ損失(unexposed film thickness loss;UFTL)も得られた;UFTL値(nm)は表2に示される。
以下の表2に示されるように、フォトスピード(クリアのための線量(E0);測定されたライン幅についてのドース−ツー−サイズ(dose−to−size)、Es)、測定されたライン幅(nm)およびLWRデータが、28nmフィーチャサイズ(CD)を目標にするライン/スペースフィーチャ(1:1ピッチ)について得られた。
Claims (11)
- 式(I)を有する酸脱保護性モノマーと、式(II)を有する塩基可溶性モノマーと、式(III)のラクトン含有モノマーと、式(IV)の光酸発生モノマーとを含むモノマー、
式(IX)の連鎖移動剤、並びに
場合によっては開始剤
の重合生成物を含むポリマー:
Rbは独立してC1−20アルキル、C3−20シクロアルキル、C6−20アリールまたはC7−20アラルキルであり、および各Rbは別々に分かれているかまたは少なくとも1つのRbが隣のRbに結合されて環構造を形成しており、
Q1はエステル含有もしくはエステル非含有のC1−20アルキル、C3−20シクロアルキル、C6−20アリールまたはC7−20アラルキルであり、
Wは−C(=O)−OH、−C(CF3)2OH、−NH−SO2−Y1(式中、Y1はFまたはC1−4ペルフルオロアルキルである)、芳香族−OH、または前記のもののいずれかとビニルエーテルとの付加物を含む塩基反応性基であり、
aは1〜3の整数であり、
Lは単環式、多環式または縮合多環式C4−20ラクトン含有基であり、
Q2はエステル含有もしくはエステル非含有であって、かつフッ素化されているかもしくはフッ素化されていない、C1−20アルキル、C3−20シクロアルキル、C6−20アリールまたはC7−20アラルキル基であり、
Aはエステル含有もしくはエステル非含有であって、かつフッ素化されているかもしくはフッ素化されていない、C1−20アルキル、C3−20シクロアルキル、C6−20アリールまたはC7−20アラルキルであり、
Zはスルホナート、スルホンアミドのアニオン、またはスルホンイミドのアニオンを含むアニオン性部分であり、
Gは式(V)を有しており:
Zはy価のC1−20有機基であり、
xは0または1であり、
Rdは置換もしくは非置換のC1−20アルキル、C3−20シクロアルキル、C6−20アリール、またはC7−20アラルキルである。 - Aが−[(C(Re)2)xC(=O)O]c−(C(Rf)2)y(CF2)z−基、またはo−、m−もしくはp−置換−C6Rg 4−基であり、式中、各Re、RfおよびRgはそれぞれ独立してH、F、C1−6フルオロアルキルまたはC1−6アルキルであり、cは0または1であり、xは1〜10の整数であり、yおよびzは独立して0〜10の整数であり、並びに合計y+zは少なくとも1である、
請求項1〜3のいずれか1項に記載のポリマー。 - Gが式(VI)、(VII)または(VIII)を有する請求項1〜5のいずれか1項に記載のポリマー:
- 請求項1〜8のいずれか1項に記載のポリマーを含むフォトレジスト組成物。
- (a)基体表面上のパターン形成される1以上の層を有する基体、および
(b)パターン形成される1以上の層上の、請求項9に記載のフォトレジスト組成物の層、
を含むコーティングされた基体。 - 請求項1〜8のいずれか1項に記載の前記モノマーを、前記連鎖移動剤の存在下でラジカル的にまたは熱的に開始させることを含む、ポリマーを形成する方法。
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JP2015129273A (ja) * | 2013-12-19 | 2015-07-16 | ローム アンド ハース エレクトロニック マテリアルズ エルエルシーRohm and Haas Electronic Materials LLC | 酸不安定基を有する共重合体、フォトレジスト組成物、塗布基板、および電子デバイス形成方法 |
JP2017036435A (ja) * | 2015-07-29 | 2017-02-16 | ローム アンド ハース エレクトロニック マテリアルズ エルエルシーRohm and Haas Electronic Materials LLC | ナノ粒子ポリマーレジスト |
WO2019181228A1 (ja) * | 2018-03-19 | 2019-09-26 | 株式会社ダイセル | フォトレジスト用樹脂、フォトレジスト用樹脂の製造方法、フォトレジスト用樹脂組成物、及びパターン形成方法 |
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EP3339957B1 (en) * | 2016-12-20 | 2019-02-27 | GenISys GmbH | Process dose and process bias determination for beam lithography |
KR102164614B1 (ko) * | 2017-11-24 | 2020-10-12 | 주식회사 엘지화학 | 포토레지스트 조성물 및 이를 이용한 포토레지스트 필름 |
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US20120328983A1 (en) | 2012-12-27 |
US10025181B2 (en) | 2018-07-17 |
KR20130001707A (ko) | 2013-01-04 |
CN102850484B (zh) | 2015-11-25 |
JP5961458B2 (ja) | 2016-08-02 |
CN102850484A (zh) | 2013-01-02 |
KR101400767B1 (ko) | 2014-05-29 |
TW201307404A (zh) | 2013-02-16 |
EP2540750A1 (en) | 2013-01-02 |
TWI448477B (zh) | 2014-08-11 |
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