JP6853308B2 - 重合体、有機膜形成用組成物、およびパターン形成方法 - Google Patents
重合体、有機膜形成用組成物、およびパターン形成方法 Download PDFInfo
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- JP6853308B2 JP6853308B2 JP2019131730A JP2019131730A JP6853308B2 JP 6853308 B2 JP6853308 B2 JP 6853308B2 JP 2019131730 A JP2019131730 A JP 2019131730A JP 2019131730 A JP2019131730 A JP 2019131730A JP 6853308 B2 JP6853308 B2 JP 6853308B2
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- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 125000002676 chrysenyl group Chemical group C1(=CC=CC=2C3=CC=C4C=CC=CC4=C3C=CC12)* 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 125000004093 cyano group Chemical group *C#N 0.000 description 1
- 125000000392 cycloalkenyl group Chemical group 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 125000005509 dibenzothiophenyl group Chemical group 0.000 description 1
- DENRZWYUOJLTMF-UHFFFAOYSA-N diethyl sulfate Chemical compound CCOS(=O)(=O)OCC DENRZWYUOJLTMF-UHFFFAOYSA-N 0.000 description 1
- 229940008406 diethyl sulfate Drugs 0.000 description 1
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- CCIVGXIOQKPBKL-UHFFFAOYSA-M ethanesulfonate Chemical compound CCS([O-])(=O)=O CCIVGXIOQKPBKL-UHFFFAOYSA-M 0.000 description 1
- BQUDLWUEXZTHGM-UHFFFAOYSA-N ethyl propaneperoxoate Chemical compound CCOOC(=O)CC BQUDLWUEXZTHGM-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- GVEPBJHOBDJJJI-UHFFFAOYSA-N fluoranthrene Natural products C1=CC(C2=CC=CC=C22)=C3C2=CC=CC3=C1 GVEPBJHOBDJJJI-UHFFFAOYSA-N 0.000 description 1
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 125000002541 furyl group Chemical group 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 125000004404 heteroalkyl group Chemical group 0.000 description 1
- 125000004446 heteroarylalkyl group Chemical group 0.000 description 1
- 125000000717 hydrazino group Chemical group [H]N([*])N([H])[H] 0.000 description 1
- 125000005638 hydrazono group Chemical group 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 125000003454 indenyl group Chemical group C1(C=CC2=CC=CC=C12)* 0.000 description 1
- 125000001041 indolyl group Chemical group 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 125000002183 isoquinolinyl group Chemical group C1(=NC=CC2=CC=CC=C12)* 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- AUHZEENZYGFFBQ-UHFFFAOYSA-N mesitylene Substances CC1=CC(C)=CC(C)=C1 AUHZEENZYGFFBQ-UHFFFAOYSA-N 0.000 description 1
- 125000001827 mesitylenyl group Chemical group [H]C1=C(C(*)=C(C([H])=C1C([H])([H])[H])C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229940098779 methanesulfonic acid Drugs 0.000 description 1
- 125000001434 methanylylidene group Chemical group [H]C#[*] 0.000 description 1
- UZKWTJUDCOPSNM-UHFFFAOYSA-N methoxybenzene Substances CCCCOC=C UZKWTJUDCOPSNM-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000002950 monocyclic group Chemical group 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- AICOOMRHRUFYCM-ZRRPKQBOSA-N oxazine, 1 Chemical compound C([C@@H]1[C@H](C(C[C@]2(C)[C@@H]([C@H](C)N(C)C)[C@H](O)C[C@]21C)=O)CC1=CC2)C[C@H]1[C@@]1(C)[C@H]2N=C(C(C)C)OC1 AICOOMRHRUFYCM-ZRRPKQBOSA-N 0.000 description 1
- 125000002971 oxazolyl group Chemical group 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- 229920002866 paraformaldehyde Polymers 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- 125000005561 phenanthryl group Chemical group 0.000 description 1
- 125000001791 phenazinyl group Chemical group C1(=CC=CC2=NC3=CC=CC=C3N=C12)* 0.000 description 1
- 229940044654 phenolsulfonic acid Drugs 0.000 description 1
- 125000001484 phenothiazinyl group Chemical group C1(=CC=CC=2SC3=CC=CC=C3NC12)* 0.000 description 1
- RLOWWWKZYUNIDI-UHFFFAOYSA-N phosphinic chloride Chemical compound ClP=O RLOWWWKZYUNIDI-UHFFFAOYSA-N 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000307 polymer substrate Polymers 0.000 description 1
- 239000002954 polymerization reaction product Substances 0.000 description 1
- 125000003373 pyrazinyl group Chemical group 0.000 description 1
- 125000003226 pyrazolyl group Chemical group 0.000 description 1
- MFUFBSLEAGDECJ-UHFFFAOYSA-N pyren-2-ylamine Natural products C1=CC=C2C=CC3=CC(N)=CC4=CC=C1C2=C43 MFUFBSLEAGDECJ-UHFFFAOYSA-N 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- ZDYVRSLAEXCVBX-UHFFFAOYSA-N pyridinium p-toluenesulfonate Chemical compound C1=CC=[NH+]C=C1.CC1=CC=C(S([O-])(=O)=O)C=C1 ZDYVRSLAEXCVBX-UHFFFAOYSA-N 0.000 description 1
- 125000000168 pyrrolyl group Chemical group 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 125000002943 quinolinyl group Chemical group N1=C(C=CC2=CC=CC=C12)* 0.000 description 1
- 125000001567 quinoxalinyl group Chemical group N1=C(C=NC2=CC=CC=C12)* 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 125000001935 tetracenyl group Chemical group C1(=CC=CC2=CC3=CC4=CC=CC=C4C=C3C=C12)* 0.000 description 1
- 125000000335 thiazolyl group Chemical group 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 125000004306 triazinyl group Chemical group 0.000 description 1
- 125000001425 triazolyl group Chemical group 0.000 description 1
- ITMCEJHCFYSIIV-UHFFFAOYSA-N triflic acid Chemical compound OS(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-N 0.000 description 1
- 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
- 239000008096 xylene Substances 0.000 description 1
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- C08G8/04—Condensation polymers of aldehydes or ketones with phenols only of aldehydes
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- C08G16/0212—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes with acyclic or carbocyclic organic compounds
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- C08G16/0237—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes with acyclic or carbocyclic organic compounds containing atoms other than carbon and hydrogen containing sulfur
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- 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
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Description
XはO、S、またはNR(ただし、Rは水素原子または置換もしくは非置換の炭素数1〜30のアルキル基)であり、
Ar1およびAr2は、それぞれ独立して、置換または非置換の炭素数6〜30の芳香環基であり、
n1およびn2は、それぞれ独立して、1〜3の整数であり;
Ar3は、少なくとも2個の環が縮合した置換または非置換の炭素数10〜30の縮合芳香環基であり、
mは、1〜3の整数である。
Xは、それぞれ独立して、O、S、またはNR(ただし、Rは水素原子または置換もしくは非置換の炭素数1〜30のアルキル基)であり、
R1〜R15は、それぞれ独立して、水素原子、ヒドロキシ基、または炭素数1〜5のアルコキシ基である。
Xは、O、S、またはNR(ただし、Rは水素原子または置換もしくは非置換の炭素数1〜30のアルキル基)であり、
Ar1およびAr2は、それぞれ独立して、置換または非置換の炭素数6〜30の芳香環基であり、
n1およびn2は、それぞれ独立して、1〜3の整数であり;
Ar3は、少なくとも2個の環が縮合した置換または非置換の炭素数10〜30の縮合芳香環基であり、
mは、1〜3の整数である。
Xは、それぞれ独立して、O、S、またはNR(ただし、Rは水素原子または置換もしくは非置換の炭素数1〜30のアルキル基)であり、
R1〜R15は、それぞれ独立して、水素原子、ヒドロキシ基、または炭素数1〜5のアルコキシ基である。
合成例1:化合物1の合成
第1段階:化合物1aの合成
フラスコに1−ヒドロキシピレン(43.6g、0.2mol)および1−ブロモピレン(28.1g、0.1mol)を入れ200mLのピリジンに溶かした後、K3PO4(42.5g、0.2mol)およびCuO(11.9g、0.15mol)を追加して添加し、120℃で40時間攪拌し反応を行った。
上記化合物1a(20.9g、0.05mol)をN,N−ジメチルホルムアミド(150ml)に溶かした後、POCl3(30.7g、0.2mol)を0℃で30分にわたってゆっくりと入れ、70℃で10時間攪拌し反応を行った。
合成例1において、1−ヒドロキシピレンの代わりに1−アミノピレンを使用したことを除いては、同様の方法で下記化合物2を得た。
合成例1において、1−ヒドロキシピレンの代わりに9−ヒドロキシフェナントレンを使用したことを除いては、同様の方法で下記化合物3を得た。
第1段階:化合物4aの合成
フラスコに1−メトキシピレン(23.2g、0.1mol)を入れ、200mLの酢酸に溶かした後、常温でHBr(6mL)をゆっくりと入れ、さらに1時間攪拌し反応を行った。
合成例1において、1−ブロモピレンの代わりに上記化合物4aを使用したことを除いては、同様の方法で下記化合物4を得た。
フラスコに化合物4(23.7g、0.05mol)を入れ、150mLのN−メチル−2−ピロリドンに溶かした後、水酸化カリウム(11.2g、0.2mol)、および1−ドデカンチオール(20.2g、0.1mol)を入れ、130℃で8時間攪拌し反応を行った。
実施例1:樹脂1の合成
フラスコに化合物1(23.7g、0.05mol)および1−ヒドロキシピレン(21.8g、0.1mol)を入れ、100mLのプロピレングリコールメチルエーテルアセテート(PGMEA)に溶かした後、常温でp−トルエンスルホン酸(9.5g、0.05mol)をゆっくりと入れ、110℃で10時間攪拌し反応を行った。
実施例1において、化合物1の代わりに化合物2を使用したことを除いては同様の方法を用いて、重量平均分子量が2,700である樹脂2を得た。
実施例1において、化合物1の代わりに化合物3を使用したことを除いては同様の方法を用いて、重量平均分子量が2,000である樹脂3を得た。
実施例1において、化合物1の代わりに化合物4を使用したことを除いては同様の方法を用いて、重量平均分子量が2,300である樹脂4を得た。
実施例1において、化合物1の代わりに化合物5を使用したことを除いては同様の方法を用いて、重量平均分子量が3,600である樹脂5を得た。
実施例1において、化合物1および1−ヒドロキシピレン以外にインドールを追加して使用したことを除いては同様の方法を用いて、重量平均分子量が2,600である樹脂6を得た。
実施例6において、化合物1の代わりに化合物4を使用したことを除いては同様の方法を用いて、重量平均分子量が3,100である樹脂7を得た。
実施例6において、化合物1の代わりに化合物5を使用したことを除いては同様の方法を用いて、重量平均分子量が3,400である樹脂8を得た。
フラスコに、1−ナフトール 28.83g(0.2mol)、1,12−ベンゾペリレン 41.4g(0.15mol)、およびパラホルムアルデヒド 12.0g(0.34mol)を投入した後に、プロピレングリコールメチルエーテルアセテート(PGMEA)162gを入れた。次に、p−トルエンスルホン酸一水和物 0.19gを添加した後、90〜100℃の温度で5〜12時間攪拌した。
フラスコに、1−ピレンカルボキシアルデヒド(23.0g、0.1mol)および1−ヒドロキシピレン(21.8g、0.1mol)を入れ、プロピレングリコールメチルエーテルアセテート(PGMEA)50gを添加して溶液を準備した。この溶液に硫酸ジエチル 1.10g(7.13mmol)を添加した後、100℃で24時間攪拌し、重合反応を行った。重合が完了した後、メタノールに沈殿させてモノマーおよび低分子量体を除去して、重量平均分子量が1,800である下記の比較樹脂2を得た。
上記実施例1〜8、比較例1、および比較例2で得られたそれぞれの樹脂を1gずつ計量して、プロピレングリコールメチルエーテルアセテートとシクロヘキサノンとを1:1で混合した溶液10gに溶かし、24時間攪拌した後、0.1μmのフィルターでろ過してハードマスク組成物を製造した。
評価1:耐エッチング性
シリコンウェハーの上にハードマスク組成物を塗布した後(固形分5〜20% in PGMEA or PGMEA/シクロヘキサノン(ANONE))、ホットプレート上で、400℃で2分間熱処理して、4000Åの厚さの薄膜を形成した後、K−MAC社製の薄膜厚さ測定器で薄膜の厚さを測定した。次いで、薄膜にCFx混合ガスおよびN2O2混合ガスを使用して、それぞれドライエッチングを行って耐エッチング性の結果を確認した。その結果は下記表1の通りである。
アスペクト比1:2のパターンが形成されたウェハーと、アスペクト比1:10のパターンが形成されたウェハーのそれぞれに、上記実施例1〜8、比較例1、および比較例2によるハードマスク組成物を塗布し、ホットプレートを用いたベーク工程を経て薄膜を形成させた。その後、走査型電子顕微鏡(SEM)を用いてギャップフィル特性および平坦化性能を観察した。
Claims (10)
- 下記化学式1で表される第1の化合物、および下記化学式2で表される第2の化合物の反応生成物を含む重合体、および溶媒を含むハードマスク組成物であって、
前記重合体は、前記ハードマスク組成物の総量に対して、0.1〜30.0質量%で含まれる、ハードマスク組成物:
前記化学式1中、
Xは、O、S、またはNR(ただし、Rは水素原子または置換もしくは非置換の炭素数1〜30のアルキル基)であり、
Ar1およびAr2は、それぞれ独立して、置換または非置換の炭素数6〜30の芳香環基であり、
n1およびn2は、それぞれ独立して、1〜3の整数であり;
前記化学式2中、
Ar3は、少なくとも2個の環が縮合した置換または非置換の炭素数10〜30の縮合芳香環基であり、
mは、1〜3の整数である。 - 前記化学式1中のAr1およびAr2は、それぞれ独立して、少なくとも2個の環が縮合した置換または非置換の炭素数10〜30の縮合芳香環基である、請求項1に記載のハードマスク組成物。
- 前記化学式1中のAr1およびAr2は、それぞれ独立して、3個の環が縮合した置換もしくは非置換の炭素数14の縮合芳香環基、4個の環が縮合した置換もしくは非置換の炭素数16〜18の縮合芳香環基またはこれらの組み合わせである、請求項2に記載のハードマスク組成物。
- 前記第1の化合物は、前記化学式1中のAr1およびAr2が、それぞれ独立して、ヒドロキシ基、および炭素数1〜5のアルコキシ基のうち少なくとも1つで置換されているかまたは非置換である化合物である、請求項1〜3のいずれか1項に記載のハードマスク組成物。
- 前記化学式1中のn1およびn2は、それぞれ1である、請求項1〜4のいずれか1項に記載のハードマスク組成物。
- 前記化学式2中のAr3は、置換もしくは非置換のナフチル基、置換もしくは非置換のアントラセニル基、置換もしくは非置換のフェナントレニル基、置換もしくは非置換のトリフェニレニル基、置換もしくは非置換のピレニル基、またはこれらの組み合わせである、請求項1〜7のいずれか1項に記載のハードマスク組成物。
- 前記重合体の重量平均分子量が1,500〜4,000である、請求項1〜8のいずれか1項に記載のハードマスク組成物。
- 基板上に材料層を形成する段階と、
前記材料層の上に請求項1〜9のいずれか1項に記載のハードマスク組成物を塗布する段階と、
塗布された前記ハードマスク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させる段階と、
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。
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