JP2011022348A - 感放射線性樹脂組成物及びそれに用いられる重合体 - Google Patents
感放射線性樹脂組成物及びそれに用いられる重合体 Download PDFInfo
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- JP2011022348A JP2011022348A JP2009167220A JP2009167220A JP2011022348A JP 2011022348 A JP2011022348 A JP 2011022348A JP 2009167220 A JP2009167220 A JP 2009167220A JP 2009167220 A JP2009167220 A JP 2009167220A JP 2011022348 A JP2011022348 A JP 2011022348A
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- 239000007983 Tris buffer Substances 0.000 description 1
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- RVIZJROSQMQZCG-UHFFFAOYSA-N adamantane-1,2-diol Chemical compound C1C(C2)CC3CC1C(O)C2(O)C3 RVIZJROSQMQZCG-UHFFFAOYSA-N 0.000 description 1
- MOLCWHCSXCKHAP-UHFFFAOYSA-N adamantane-1,3-diol Chemical compound C1C(C2)CC3CC1(O)CC2(O)C3 MOLCWHCSXCKHAP-UHFFFAOYSA-N 0.000 description 1
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- 125000002704 decyl group Chemical group [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])* 0.000 description 1
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- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 1
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- 125000003136 n-heptyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001298 n-hexoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
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- 125000001820 oxy group Chemical group [*:1]O[*:2] 0.000 description 1
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- 125000003854 p-chlorophenyl group Chemical group [H]C1=C([H])C(*)=C([H])C([H])=C1Cl 0.000 description 1
- 125000001037 p-tolyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1*)C([H])([H])[H] 0.000 description 1
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- 230000000704 physical effect Effects 0.000 description 1
- PJGSXYOJTGTZAV-UHFFFAOYSA-N pinacolone Chemical compound CC(=O)C(C)(C)C PJGSXYOJTGTZAV-UHFFFAOYSA-N 0.000 description 1
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- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
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- 125000003548 sec-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000019795 sodium metasilicate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- IXXMVXXFAJGOQO-UHFFFAOYSA-N tert-butyl 2-hydroxypropanoate Chemical compound CC(O)C(=O)OC(C)(C)C IXXMVXXFAJGOQO-UHFFFAOYSA-N 0.000 description 1
- 125000001973 tert-pentyl group Chemical group [H]C([H])([H])C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000001544 thienyl group Chemical group 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
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- PXXNTAGJWPJAGM-UHFFFAOYSA-N vertaline Natural products C1C2C=3C=C(OC)C(OC)=CC=3OC(C=C3)=CC=C3CCC(=O)OC1CC1N2CCCC1 PXXNTAGJWPJAGM-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1803—C3-(meth)acrylate, e.g. (iso)propyl (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
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Abstract
Description
本発明の感放射線性樹脂組成物は、繰り返し単位(1)、並びに繰り返し単位(2)、繰り返し単位(3)、及び繰り返し単位(4)からなる群より選択される少なくとも一種の繰り返し単位を含有する重合体(A)と、溶剤(B)と、を含む組成物である。以下、その詳細について説明する。
本発明の重合体(A)は、繰り返し単位(1)、並びに繰り返し単位(2)、繰り返し単位(3)、及び繰り返し単位(4)からなる群より選択される少なくとも一種の繰り返し単位を含有する重合体である。
重合体(A)に含有される繰り返し単位(1)は、下記一般式(1)で表される、放射線照射により酸を発生する機能を有する感放射線性酸発生基を含む繰り返し単位である。
繰り返し単位(1−1)は、下記一般式(1−1)で表される構造を有することが好ましい。
繰り返し単位(1−2)は、下記一般式(1−2)で表される構造を有することが好ましい。
重合体(A)に含有されることがある繰り返し単位(2)は、下記一般式(2)で表される、環状カーボネート構造を含む繰り返し単位である。繰り返し単位(3)は、下記一般式(3)で表される、ラクトン構造を含む繰り返し単位である。繰り返し単位(4)は、下記一般式(4)で表される、ラクトン構造を含む繰り返し単位である。
重合体(A)は、下記一般式(5)で表される繰り返し単位(5)を、更に含有するものであることが好ましい。
重合体(A)は、前述の繰り返し単位(1)〜(5)以外に、その他の繰り返し単位を含有していてもよい。
重合体(A)は、所定の各繰り返し単位を与える重合性不飽和単量体を、例えば、ヒドロパーオキシド類、ジアルキルパーオキシド類、ジアシルパーオキシド類、アゾ化合物等のラジカル重合開始剤を使用し、必要に応じて連鎖移動剤の存在下、適当な溶媒中で重合することにより調製することができる。
本発明の感放射線性樹脂組成物は、溶剤(B)により重合体(A)を溶解した樹脂組成物溶液として調整される。
ルアセテート、プロピレングリコールモノ−i−プロピルエーテルアセテート、プロピレングリコールモノ−n−ブチルエーテルアセテート、プロピレングリコールモノ−i−ブチルエーテルアセテート、プロピレングリコールモノ−sec−ブチルエーテルアセテート、プロピレングリコールモノ−t−ブチルエーテルアセテート等のプロピレングリコールモノアルキルエーテルアセテート類;2−ヒドロキシプロピオン酸メチル、2−ヒドロキシプロピオン酸エチル、2−ヒドロキシプロピオン酸n−プロピル、2−ヒドロキシプロピオン酸i−プロピル、2−ヒドロキシプロピオン酸n−ブチル、2−ヒドロキシプロ
ピオン酸i−ブチル、2−ヒドロキシプロピオン酸sec−ブチル、2−ヒドロキシプロピオン酸t−ブチル等の2−ヒドロキシプロピオン酸アルキル類;3−メトキシプロピオン酸メチル、3−メトキシプロピオン酸エチル、3−エトキシプロピオン酸メチル、3−エトキシプロピオン酸エチル等の3−アルコキシプロピオン酸アルキル類の他、
本発明の感放射線性樹脂組成物は、添加物として、窒素含有化合物(C)を含んでいることが好ましい。
本発明の感放射線性樹脂組成物は、重合体(A)中の感放射線性酸発生基の他に、添加物として、感放射線性酸発生剤(以下、「他の酸発生剤(D)」と記載する。)を含むことができる。
本発明の感放射線性樹脂組成物は、特に化学増幅型レジストとして有用である。前記化学増幅型レジストにおいては、露光により感放射線性酸発生基から発生した酸の作用によって、重合体(A)に含有される繰り返し単位(1)中の酸解離性基が解離して、カルボキシル基が生じる。その結果、レジストの露光部のアルカリ現像液に対する溶解性が高くなるため、露光部はアルカリ現像液によって溶解、除去され、ポジ型のレジストパターンが得られる。
東ソー社製GPCカラム(以下商品名で「G2000HXL」2本、「G3000HXL」1本、「G4000HXL」1本)を用い、流速が1.0ml/分、溶出溶媒としてテトラヒドロフラン、カラム温度が40℃の分析条件で、単分散ポリスチレンを標準とするゲルパーミエーションクロマトグラフィ(GPC)により測定した。また、分散度Mw/Mnは測定結果より算出した。
ジーエルサイエンス社製の商品名「Inertsil ODS−25μmカラム(内径4.6mmφ×長さ250mm)」を用い、流量が1.0ml/分、溶出溶媒としてアクリロニトリルの0.1質量%リン酸水溶液の分析条件で、高速液体クロマトグラフィー(HPLC)により測定した。
重合体(A−1)〜(A−13)の合成に用いた、各重合性単量体を下記式(M1−1)〜(M5−5)で示す。
下記表2に示す割合で、重合体(A)、溶剤(B)、及び含窒素化合物(C)を混合し、実施例1〜10の感放射線性樹脂組成物を調製した。一方、重合体(A)、溶剤(B)及び含窒素化合物(C)に加え他の酸発生剤(D)を混合し、比較例1〜3の感放射線性樹脂組成物を調製した。尚、表2中の、各重合体(A−1)〜(A−13)は、表1中の各重合体(A−1)〜(A−13)であり、溶剤(B)、含窒素化合物(C)、及び他の酸発生剤(D)はそれぞれ下記に示す化合物である。
(B−1):プロピレングリコールモノメチルエーテルアセテート
(C−1):N−t−ブトキシカルボニル−4−ヒドロキシピペリジン
(D−1):トリフェニルスルホニウム−ノナフルオロ−n−ブタンスルホネート
実施例1〜10及び比較例1〜3の各感放射線性樹脂組成物について、下記(1)〜(3)の各種評価を行った。これらの評価結果を下記表3に示す。
基板として、表面に膜厚77nmの下層反射防止膜(商品名「ARC29A」、ブルワー・サイエンス社製)を形成した8インチシリコンウェハを用いた。尚、この反射防止膜の形成には、商品名「CLEAN TRACK ACT8」(東京エレクトロン社製)を用いた。前記基板上に、表2の感放射線性樹脂組成物を前記商品名「CLEAN TRACK ACT8」を用いてスピンコートし、表3に記載の条件でPBを行うことにより、膜厚100nmのレジスト被膜を形成した。このレジスト被膜に、ArFエキシマレーザー露光装置(商品名「NSR S306C」、NIKON社製、照射条件:NA=0.78、シグマCONVENTIONAL)により、マスクパターンを介して露光した。その後、下記表3に示す条件でPEBを行った後、2.38質量%のテトラメチルアンモニウムヒドロキシド水溶液を用いて、23℃で30秒間現像した後、水洗し、乾燥して、ポジ型のレジストパターンを形成した。このとき、設計寸法が150nmLの1対1ラインアンドスペースのマスクを介して形成したパターンが、線幅が150nmLの1対1ラインアンドスペースとなる露光量(mJ/cm2)を最適露光量とし、この最適露光量を「感度(mJ/cm2)」とした。尚、この測長には走査型電子顕微鏡(商品名「S−9380」、日立ハイテクノロジーズ社製)を用いた。
最適露光量にて115nmS/1150nmPのマスクパターンで解像される90nmS/1150nmPのパターン寸法が、81〜99nmS/1150nmPの範囲内となる場合のフォーカスの振れ幅を孤立スペース焦点深度(μm)とした。尚、パターン寸法の観測には前記走査型電子顕微鏡を用いた。
最適露光量において、5種類のマスクサイズ(85.0nmL/180nmP、87.5nmL/180nmP、90.0nmL/180nmP、92.5nmL/180nmP、95.0nmL/180nmP)で解像されるパターン寸法を測定した。得られた測定結果を、横軸をマスクサイズ、縦軸を線幅としてプロットし、最小二乗法により得られたグラフの傾きを求めた。この傾きをMEEFとした。尚、パターン寸法の観測には前記走査型電子顕微鏡を用いた。
Claims (5)
- 下記一般式(1)で表される繰り返し単位(1)、並びに下記一般式(2)で表される繰り返し単位(2)、下記一般式(3)で表される繰り返し単位(3)、及び下記一般式(4)で表される繰り返し単位(4)からなる群より選択される少なくとも一種の繰り返し単位を含有する重合体(A)と、
溶剤(B)と、
を含む感放射線性樹脂組成物。
- 前記繰り返し単位(1)が、下記一般式(1−1)で表される繰り返し単位(1−1)及び下記一般式(1−2)で表される繰り返し単位(1−2)の少なくともいずれかの繰り返し単位である、請求項1に記載の感放射線性樹脂組成物。
- 窒素含有化合物(C)を更に含む請求項1〜3のいずれか一項に記載の感放射線性樹脂組成物。
- 下記一般式(1)で表される繰り返し単位(1)、並びに下記一般式(2)で表される繰り返し単位(2)、下記一般式(3)で表される繰り返し単位(3)、及び下記一般式(4)で表される繰り返し単位(4)からなる群より選択される少なくとも一種の繰り返し単位を含有する重合体。
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JP6093614B2 (ja) * | 2013-03-25 | 2017-03-08 | 東京応化工業株式会社 | レジスト組成物及びレジストパターン形成方法 |
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US10571805B2 (en) | 2015-06-26 | 2020-02-25 | Sumitomo Chemical Company, Limited | Resist composition |
JPWO2021106535A1 (ja) * | 2019-11-29 | 2021-06-03 | ||
JPWO2021106536A1 (ja) * | 2019-11-29 | 2021-06-03 | ||
WO2021106536A1 (ja) * | 2019-11-29 | 2021-06-03 | 富士フイルム株式会社 | レジスト下層膜形成用組成物、パターン形成方法、及び、電子デバイスの製造方法 |
WO2021106537A1 (ja) * | 2019-11-29 | 2021-06-03 | 富士フイルム株式会社 | レジスト下層膜形成用組成物、パターン形成方法、及び、電子デバイスの製造方法 |
WO2021106535A1 (ja) * | 2019-11-29 | 2021-06-03 | 富士フイルム株式会社 | 感活性光線性又は感放射線性樹脂組成物、パターン形成方法、及び、電子デバイスの製造方法 |
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JP7309907B2 (ja) | 2019-11-29 | 2023-07-18 | 富士フイルム株式会社 | 感活性光線性又は感放射線性樹脂組成物、パターン形成方法、及び、電子デバイスの製造方法 |
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