JP2016041791A - 紫外線吸収剤、レジスト下層膜形成用組成物、及びパターン形成方法 - Google Patents
紫外線吸収剤、レジスト下層膜形成用組成物、及びパターン形成方法 Download PDFInfo
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- JP2016041791A JP2016041791A JP2014166441A JP2014166441A JP2016041791A JP 2016041791 A JP2016041791 A JP 2016041791A JP 2014166441 A JP2014166441 A JP 2014166441A JP 2014166441 A JP2014166441 A JP 2014166441A JP 2016041791 A JP2016041791 A JP 2016041791A
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- 230000003685 thermal hair damage Effects 0.000 description 1
- JMXKSZRRTHPKDL-UHFFFAOYSA-N titanium ethoxide Chemical compound [Ti+4].CC[O-].CC[O-].CC[O-].CC[O-] JMXKSZRRTHPKDL-UHFFFAOYSA-N 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- WOZZOSDBXABUFO-UHFFFAOYSA-N tri(butan-2-yloxy)alumane Chemical compound [Al+3].CCC(C)[O-].CCC(C)[O-].CCC(C)[O-] WOZZOSDBXABUFO-UHFFFAOYSA-N 0.000 description 1
- MQVCTPXBBSKLFS-UHFFFAOYSA-N tri(propan-2-yloxy)-propylsilane Chemical compound CCC[Si](OC(C)C)(OC(C)C)OC(C)C MQVCTPXBBSKLFS-UHFFFAOYSA-N 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- YNJBWRMUSHSURL-UHFFFAOYSA-N trichloroacetic acid Chemical compound OC(=O)C(Cl)(Cl)Cl YNJBWRMUSHSURL-UHFFFAOYSA-N 0.000 description 1
- VBSUMMHIJNZMRM-UHFFFAOYSA-N triethoxy(2-phenylethyl)silane Chemical compound CCO[Si](OCC)(OCC)CCC1=CC=CC=C1 VBSUMMHIJNZMRM-UHFFFAOYSA-N 0.000 description 1
- DENFJSAFJTVPJR-UHFFFAOYSA-N triethoxy(ethyl)silane Chemical compound CCO[Si](CC)(OCC)OCC DENFJSAFJTVPJR-UHFFFAOYSA-N 0.000 description 1
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 1
- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 description 1
- BJDLPDPRMYAOCM-UHFFFAOYSA-N triethoxy(propan-2-yl)silane Chemical compound CCO[Si](OCC)(OCC)C(C)C BJDLPDPRMYAOCM-UHFFFAOYSA-N 0.000 description 1
- NBXZNTLFQLUFES-UHFFFAOYSA-N triethoxy(propyl)silane Chemical compound CCC[Si](OCC)(OCC)OCC NBXZNTLFQLUFES-UHFFFAOYSA-N 0.000 description 1
- USLHPQORLCHMOC-UHFFFAOYSA-N triethoxygallane Chemical compound CCO[Ga](OCC)OCC USLHPQORLCHMOC-UHFFFAOYSA-N 0.000 description 1
- QQQSFSZALRVCSZ-UHFFFAOYSA-N triethoxysilane Chemical compound CCO[SiH](OCC)OCC QQQSFSZALRVCSZ-UHFFFAOYSA-N 0.000 description 1
- AJSTXXYNEIHPMD-UHFFFAOYSA-N triethyl borate Chemical compound CCOB(OCC)OCC AJSTXXYNEIHPMD-UHFFFAOYSA-N 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- QFCVQKSWGFVMTB-UHFFFAOYSA-N trihexoxyalumane Chemical compound [Al+3].CCCCCC[O-].CCCCCC[O-].CCCCCC[O-] QFCVQKSWGFVMTB-UHFFFAOYSA-N 0.000 description 1
- UBMUZYGBAGFCDF-UHFFFAOYSA-N trimethoxy(2-phenylethyl)silane Chemical compound CO[Si](OC)(OC)CCC1=CC=CC=C1 UBMUZYGBAGFCDF-UHFFFAOYSA-N 0.000 description 1
- LGROXJWYRXANBB-UHFFFAOYSA-N trimethoxy(propan-2-yl)silane Chemical compound CO[Si](OC)(OC)C(C)C LGROXJWYRXANBB-UHFFFAOYSA-N 0.000 description 1
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 description 1
- UAEJRRZPRZCUBE-UHFFFAOYSA-N trimethoxyalumane Chemical compound [Al+3].[O-]C.[O-]C.[O-]C UAEJRRZPRZCUBE-UHFFFAOYSA-N 0.000 description 1
- XIYWAPJTMIWONS-UHFFFAOYSA-N trimethoxygallane Chemical compound [Ga+3].[O-]C.[O-]C.[O-]C XIYWAPJTMIWONS-UHFFFAOYSA-N 0.000 description 1
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 description 1
- WRECIMRULFAWHA-UHFFFAOYSA-N trimethyl borate Chemical compound COB(OC)OC WRECIMRULFAWHA-UHFFFAOYSA-N 0.000 description 1
- GNMJFQWRASXXMS-UHFFFAOYSA-M trimethyl(phenyl)azanium;bromide Chemical compound [Br-].C[N+](C)(C)C1=CC=CC=C1 GNMJFQWRASXXMS-UHFFFAOYSA-M 0.000 description 1
- OPSWAWSNPREEFQ-UHFFFAOYSA-K triphenoxyalumane Chemical compound [Al+3].[O-]C1=CC=CC=C1.[O-]C1=CC=CC=C1.[O-]C1=CC=CC=C1 OPSWAWSNPREEFQ-UHFFFAOYSA-K 0.000 description 1
- WLOQLWBIJZDHET-UHFFFAOYSA-N triphenylsulfonium Chemical compound C1=CC=CC=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1 WLOQLWBIJZDHET-UHFFFAOYSA-N 0.000 description 1
- 239000012953 triphenylsulfonium Substances 0.000 description 1
- VUWVDNLZJXLQPT-UHFFFAOYSA-N tripropoxy(propyl)silane Chemical compound CCCO[Si](CCC)(OCCC)OCCC VUWVDNLZJXLQPT-UHFFFAOYSA-N 0.000 description 1
- OBROYCQXICMORW-UHFFFAOYSA-N tripropoxyalumane Chemical compound [Al+3].CCC[O-].CCC[O-].CCC[O-] OBROYCQXICMORW-UHFFFAOYSA-N 0.000 description 1
- OZWKZRFXJPGDFM-UHFFFAOYSA-N tripropoxysilane Chemical compound CCCO[SiH](OCCC)OCCC OZWKZRFXJPGDFM-UHFFFAOYSA-N 0.000 description 1
- LTEHWCSSIHAVOQ-UHFFFAOYSA-N tripropyl borate Chemical compound CCCOB(OCCC)OCCC LTEHWCSSIHAVOQ-UHFFFAOYSA-N 0.000 description 1
- YFTHZRPMJXBUME-UHFFFAOYSA-N tripropylamine Chemical compound CCCN(CCC)CCC YFTHZRPMJXBUME-UHFFFAOYSA-N 0.000 description 1
- YWIUPWSLDVUCDT-UHFFFAOYSA-N tris(1-methoxyethoxy)alumane Chemical compound [Al+3].COC(C)[O-].COC(C)[O-].COC(C)[O-] YWIUPWSLDVUCDT-UHFFFAOYSA-N 0.000 description 1
- IYGPXXORQKFXCZ-UHFFFAOYSA-N tris(2-methoxyethyl) borate Chemical compound COCCOB(OCCOC)OCCOC IYGPXXORQKFXCZ-UHFFFAOYSA-N 0.000 description 1
- RQNVJDSEWRGEQR-UHFFFAOYSA-N tris(prop-2-enyl) borate Chemical compound C=CCOB(OCC=C)OCC=C RQNVJDSEWRGEQR-UHFFFAOYSA-N 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- HODZVVUWYZMUHG-UHFFFAOYSA-K yttrium(3+) triphenoxide Chemical compound [Y+3].[O-]C1=CC=CC=C1.[O-]C1=CC=CC=C1.[O-]C1=CC=CC=C1 HODZVVUWYZMUHG-UHFFFAOYSA-K 0.000 description 1
Classifications
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Abstract
【解決手段】下記一般式(A−1)で示される化合物を含む紫外線吸収剤。
【化1】
(式中、Rは、メチル基、エチル基、プロピル基、及びアリル基のいずれかを表し、R1、R2、R3、R4は、それぞれ同じでも異なってもよく、水素原子、ベンゾイル基、トルオイル基、ナフトイル基、及びアントラノイル基のいずれかを表す。)
【選択図】なし
Description
R1B B1R2B B2R3B B3Si(OR0B)(4−B1−B2−B3) (B−1)
(式中、R0Bは炭素数1〜6の炭化水素基であり、R1B、R2B、R3Bは水素原子又は1価の有機基である。また、B1、B2、B3は0又は1であり、0≦B1+B2+B3≦3である。)
なお、本明細書中、Meはメチル基、Etはエチル基を示す。
本発明の紫外線吸収剤は、上記一般式(A−1)で示される化合物を含むものである。上記一般式(A−1)中のR1〜R4のベンゾイル基、トルオイル基、ナフトイル基、及びアントラノイル基は紫外線を吸収する基(以下、紫外線吸収基ともいう)であって、吸収波長の関係から、ArF(193nm)露光用としてはベンゾイル基又はトルオイル基を含有するものが好ましく、KrF(248nm)露光用としてはナフトイル基又はアントラノイル基を含有するものが好ましい。
また、上述のように、吸収波長の関係から、ArF(193nm)露光用の化合物(紫外線吸収剤)を合成する場合はベンゾイル基やトルオイル基を付加するために安息香酸やトルイル酸を用いるのが好ましく、KrF(248nm)露光用の化合物(紫外線吸収剤)を合成する場合はナフトイル基やアントラノイル基を付加するためにナフタレンカルボン酸やアントラセンカルボン酸を用いるのが好ましい。
エポキシ基1モルに対して、カルボン酸化合物が0.3モル以上であれば、未反応のエポキシ基が残存し、結果として単位重量当たりの紫外線吸収基量が少なくなることで反射防止機能が損なわれるのを防ぐことができる。また、エポキシ基1モルに対して、カルボン酸化合物が2.0モル以下であれば、未反応のカルボン酸化合物の残存によってアウトガスが発生するのを防ぐことができる。
これらの溶媒は、反応原料100質量部に対して0〜2,000質量部の範囲で使用することが好ましい。
反応触媒の使用量は、反応原料に対して0.001〜100質量%、好ましくは0.005〜50質量%の範囲である。
反応時間は0.1〜100時間とするのが好ましい。
また、このとき使用する洗浄水としては、通常、脱イオン水や超純水と呼ばれているものを使用すればよい。
洗浄回数は1回以上あればよいが、10回以上洗浄しても洗浄しただけの効果は得られないため、好ましくは1〜5回程度である。
このときの濃度としては、0.1〜50質量%が好ましく、更に好ましくは0.5〜30質量%である。このような濃度であれば、濃度が高すぎて粘度が高くなり操作性を損なったり、濃度が低すぎて溶剤の量が過大となり不経済となったりすることがない。
紫外線吸収基の数を増加させる方法としては、例えば下記反応式のようにアシル化剤を用いて化合物中の水酸基をアシル化する方法が挙げられる。
また、酸無水物を用いる場合は、トルエン等の溶媒中、反応材料となる化合物と酸無水物と、トリエチルアミン、ピリジン、4−ジメチルアミノピリジン等の塩基を順次又は同時に加え、必要に応じ、冷却あるいは加熱するなどして反応を行うのがよい。
得られた反応生成物は水洗等の精製操作を施し、粉体又は溶液として回収することができる。このとき使用する最終的な溶剤としては、上述の最終的な溶剤として挙げたものと同じものを例示することができる。また、このときの濃度としては、0.1〜50質量%が好ましく、更に好ましくは0.5〜30質量%である。
また本発明では、上述の本発明の紫外線吸収剤及びポリシロキサンを含有するレジスト下層膜形成用組成物を提供する。
紫外線吸収剤の添加量は、ベースポリマー(例えば、後述のポリシロキサン)100質量部に対して、好ましくは0.01〜50質量部、より好ましくは0.1〜40質量部である。
本発明のレジスト下層膜形成用組成物に含有されるポリシロキサンは、下記一般式(B−1)で示される化合物、これの加水分解物、これの縮合物、これの加水分解縮合物のうち1種以上を含有するものであることが好ましい。
R1B B1R2B B2R3B B3Si(OR0B)(4−B1−B2−B3) (B−1)
(式中、R0Bは炭素数1〜6の炭化水素基であり、R1B、R2B、R3Bは水素原子又は1価の有機基である。また、B1、B2、B3は0又は1であり、0≦B1+B2+B3≦3である。)
テトラアルコキシシランとしては、テトラメトキシシラン、テトラエトキシシラン、テトラプロポキシシラン、テトライソプロポキシシラン等を例示できる。
L’(OR4B)B4(OR5B)B5(O)B6 (B−2)
(式中、R4B及びR5Bは水素原子又は炭素数1〜30の有機基であり、B4+B5+B6はL’の種類によって決まる価数であり、B4、B5、B6は0以上の数であり、L’は周期律表のIII族、IV族、又はV族の元素で炭素を除くものである。)
L’がホウ素の場合、一般式(B−2)で示される化合物として、ボロンメトキシド、ボロンエトキシド、ボロンプロポキシド、ボロンブトキシド、ボロンアミロキシド、ボロンヘキシロキシド、ボロンシクロペントキシド、ボロンシクロヘキシロキシド、ボロンアリロキシド、ボロンフェノキシド、ボロンメトキシエトキシド、ホウ酸、酸化ホウ素などを例示できる。
その他に酸触媒を除去する方法として、イオン交換樹脂による方法や、エチレンオキサイド、プロピレンオキサイド等のエポキシ化合物で中和したのち除去する方法を挙げることができる。これらの方法は、反応に使用された酸触媒に合わせて適宜選択することができる。
なお、水溶性有機溶剤と水難溶性有機溶剤との混合割合は、酸触媒を除去する際に用いられるものと同様でよい。
また、このときの水洗操作により、ポリシロキサンの一部が水層に逃げ、実質的に分画操作と同等の効果が得られている場合があるため、水洗回数や洗浄水の量は触媒除去効果と分画効果を鑑みて適宜選択すればよい。
また、ポリシロキサン溶液に加える最終的な溶剤も、酸触媒を用いる場合と同様のものを用いることができる。
また、酸触媒を用いる場合と同様、安定剤を添加してもよい。
なお、有機溶剤を使用する場合は、酸触媒を用いる場合と同様のものを用いることができる。
なお、上記重量平均分子量に関するデータは、検出器としてRI、溶離溶剤としてテトラヒドロフランを用いたゲルパーミエーションクロマトグラフィー(GPC)により、標準物質としてポリスチレンを用いて、ポリスチレン換算で分子量を表したものである。
本発明のレジスト下層膜形成用組成物には、安定性を向上させるために、炭素数が1〜30の1価又は2価以上の有機酸を添加することが好ましい。このような有機酸としては、ギ酸、酢酸、プロピオン酸、ブタン酸、ペンタン酸、ヘキサン酸、ヘプタン酸、オクタン酸、ノナン酸、デカン酸、オレイン酸、ステアリン酸、リノール酸、リノレン酸、安息香酸、フタル酸、イソフタル酸、テレフタル酸、サリチル酸、トリフルオロ酢酸、モノクロロ酢酸、ジクロロ酢酸、トリクロロ酢酸、シュウ酸、マロン酸、メチルマロン酸、エチルマロン酸、プロピルマロン酸、ブチルマロン酸、ジメチルマロン酸、ジエチルマロン酸、コハク酸、メチルコハク酸、グルタル酸、アジピン酸、イタコン酸、マレイン酸、フマル酸、シトラコン酸、クエン酸等を例示することができる。特にシュウ酸、マレイン酸、ギ酸、酢酸、プロピオン酸、クエン酸等が好ましい。また、安定性を保つため、2種以上の酸を混合して使用してもよい。添加量は組成物に含まれるポリシロキサン100質量部に対して0.001〜25質量部が好ましく、より好ましくは0.01〜15質量部、更に好ましくは0.1〜5質量部である。
あるいは、上記有機酸を組成物のpHに換算して、好ましくは0≦pH≦7、より好ましくは0.3≦pH≦6.5、更に好ましくは0.5≦pH≦6となるように配合することが好ましい。
水を含む全溶剤の使用量は、ベースポリマー(ポリシロキサン)100質量部に対して100〜100,000質量部が好ましく、より好ましくは200〜50,000質量部である。このような添加量とすることで、リソグラフィー性能を向上させることができ、かつ塗布膜の均一性が悪化しにくいため、はじきの発生を抑えることができる。
本発明では、被加工体上に塗布型有機下層膜材料を用いて有機下層膜を形成し、該有機下層膜の上に上述の本発明のレジスト下層膜形成用組成物を用いてレジスト下層膜を形成し、該レジスト下層膜上にレジスト上層膜を形成し、該レジスト上層膜にレジストパターンを形成し、該レジストパターンをマスクにして前記レジスト下層膜にドライエッチングでパターンを転写し、該パターンが転写されたレジスト下層膜をマスクにして前記有機下層膜にドライエッチングでパターンを転写し、更に該パターンが転写された有機下層膜をマスクにして前記被加工体にドライエッチングでパターンを転写するパターン形成方法を提供する。
一般式(A−1)で示される化合物(紫外線吸収剤に用いられる化合物)を以下に示す方法で合成した(合成例1−1〜1−4)。
IR(ATR法):ν=3477,3054,2960,1695,1593,1576,1510,1457,1347,1278,1243,1197,1136,1076,1037,1018,934,816,784,734cm−1。
1H−NMR(600MHz in DMSO−d6):δ=8.58〜8.63(2H,m),8.0〜8.15(8H,m),7.5〜7.6(4H,m),5.6〜5.8(1H,m),5.4〜5.45(2H,OH,m),5.0〜5.1(2H,m),4.0〜4.3(8H,m)3.7〜4.0(4H、m)ppm。
IR(ATR法):ν=3469,3051,2956,1689,1625,1523,1471,1414,1349,1318,1288,1264,1234,1200,1173,1152,1088,1015,893,848,793,762,733cm−1。
1H−NMR(600MHz in DMSO−d6):δ=8.6〜8.8(2H,m),8.1〜8.2(4H,m),7.5〜7.7(6H,m),5.6〜5.8(1H,m),5.35〜5.5(2H,OH,m),5.05〜5.20(2H,m),4.0〜4.40(8H,m),3.7〜3.95(4H,m)ppm。
IR(ATR法):ν=3488,3053,2955,1690,1456,1413,1348,1319,1288,1264,1199,1172,1152,1016,893,847,793,766,733cm−1。
1H−NMR(600MHz in DMSO−d6):δ=8.75(2H,s),8.15(4H,d),8.09(4H,d),7.54〜7.58(8H,m),5.70(1H,m),5.49(2H、−OH,d),5.15(1H,d),5.07(1H,d),4.57(4H,m),4.15〜4.25(4H,m),3.81〜3.92(4H,m)ppm。
13C−NMR(150MHz in DMSO−d6):δ=168.51,149.29,148.76,131.77,130.39,129.18,128.85,128.53,127.65,127.53,127.24,125.70,124.83,116.88,67.31,65.39,44.5,45.1ppm。
IR(ATR法):ν=3469,3051,2956,1689,1625,1523,1471,1414,1349,1318,1288,1264,1234,1200,1173,1152,1088,1015,893,848,793,762,733cm−1。
1H−NMR(600MHz in DMSO−d6):δ=8.76(2H,s),8.15(4H,d),8.08(4H,d),7.5〜7.6(8H,m),5.47(2H,OH,d−d),4.5〜4.6(4H,m),4.18(2H,m),3.75〜3.9(4H,m),3.01(3H,s−d)ppm。
13C−NMR(150MHz in DMSO−d6):δ=168.49,149.29,149.19,130.39,129.21,128.55,127.63,127.53,127.25,125.70,124.82,67.32,65.37,45.07,45.06ppm。
一般式(B−1)で示されるポリシロキサンを以下に示す方法で合成した(合成例2−1〜2−3)。
(合成例2−1)ポリシロキサン1の合成
エタノール260g、メタンスルホン酸0.2g、及び脱イオン水260gの混合物にメチルトリメトキシシラン34.1g及びテトラエトキシシラン52.2gの混合物を添加し、12時間、40℃に保持し、加水分解縮合させた。反応終了後、プロピレングリコールエチルエーテル(PGEE)300gを加え、副生アルコール及び過剰の水分を減圧留去し、ポリシロキサン1のPGEE溶液260g(化合物濃度11.2%)を得た。ポリシロキサン1のポリスチレン換算分子量を測定したところMw=2,300であった。
エタノール260g、メタンスルホン酸0.2g、及び脱イオン水260gの混合物にフェニルトリメトキシシラン5.0g及びテトラエトキシシラン99.2gの混合物を添加し、12時間、40℃に保持し、加水分解縮合させた。反応終了後、プロピレングリコールエチルエーテル(PGEE)300gを加え、副生アルコール及び過剰の水分を減圧留去し、ポリシロキサン2のPGEE溶液290g(化合物濃度10.1%)を得た。ポリシロキサン2のポリスチレン換算分子量を測定したところMw=1,900であった。
エタノール260g、メタンスルホン酸0.2g、及び脱イオン水260gの混合物にメチルトリメトキシシラン68.1gを添加し、12時間、40℃に保持し、加水分解縮合させた。反応終了後、プロピレングリコールエチルエーテル(PGEE)300gを加え、副生アルコール及び過剰の水分を減圧留去し、ポリシロキサン3のPGEE溶液310g(化合物濃度10.1%)を得た。ポリシロキサン3のポリスチレン換算分子量を測定したところMw=2,200であった。
上記の合成例2−1〜2−3で得られたポリシロキサン1〜3、紫外線吸収剤として合成例1−1〜1−4で得られた化合物(D1〜D4)、架橋促進剤、溶剤、添加物(H2O)を表1に示す割合で混合し、0.1μmのフッ素樹脂製のフィルターで濾過することによって、レジスト下層膜形成用組成物溶液をそれぞれ調製し、それぞれSol.1〜10とした。
Sol.1〜10を回転塗布し、200℃で60秒間加熱成膜して、膜厚80nmのポリシロキサン含有膜(Film1〜10とする)を形成し、J.A.ウーラム社の入射角度可変の分光エリプソメーター(VUV−VASE)で波長248nmにおけるFilm1〜10の光学定数(屈折率n、消衰係数k)を求めた結果を表2に示す。
シリコンウエハー上に、信越化学工業(株)製スピンオンカーボン膜形成用組成物ODL−69(カーボン含有量86質量%)を膜厚2.0μmで塗布し、300℃で60秒間加熱して有機下層膜を形成した。その上にレジスト下層膜形成用組成物として上述のSol.1〜10を塗布し、200℃で60秒間加熱して膜厚80nmのレジスト下層膜としてFilm1〜10を形成した。
次いで、これらをKrF液浸露光装置((株)ニコン製;NSR−S206D(NA=0.68)で露光し、110℃で60秒間ベーク(PEB)し、2.38質量%テトラメチルアンモニウムヒドロキシド(TMAH)水溶液で現像して、130nmのラインアンドスペースパターンを得た。このウエハーの断面形状を(株)日立製作所製電子顕微鏡(S−9380)で測定した結果を表4に示す。
分散度(Mw/Mn)=1.98
PAG2(酸発生剤):ビス(シクロヘキシルスルホニル)ジアゾメタン
Base(塩基性化合物):トリス(2−メトキシエチル)アミン
界面活性剤:FC−4430(住友スリーエム(株)製)
溶剤A:プロピレングリコールメチルエーテルアセテート(PGMEA)
溶剤B:乳酸エチル
Claims (7)
- 前記一般式(A−1)中のR1、R2、R3、R4のうち3つ以上が、ベンゾイル基、トルオイル基、ナフトイル基、及びアントラノイル基のいずれかであることを特徴とする請求項1に記載の紫外線吸収剤。
- 請求項1又は請求項2に記載の紫外線吸収剤及びポリシロキサンを含有するものであることを特徴とするレジスト下層膜形成用組成物。
- 前記ポリシロキサンが下記一般式(B−1)で示される化合物、これの加水分解物、これの縮合物、これの加水分解縮合物のうち1種類以上を含有するものであることを特徴とする請求項3に記載のレジスト下層膜形成用組成物。
R1B B1R2B B2R3B B3Si(OR0B)(4−B1−B2−B3) (B−1)
(式中、R0Bは炭素数1〜6の炭化水素基であり、R1B、R2B、R3Bは水素原子又は1価の有機基である。また、B1、B2、B3は0又は1であり、0≦B1+B2+B3≦3である。) - 被加工体上に塗布型有機下層膜材料を用いて有機下層膜を形成し、該有機下層膜の上に請求項3又は請求項4に記載のレジスト下層膜形成用組成物を用いてレジスト下層膜を形成し、該レジスト下層膜上にレジスト上層膜を形成し、該レジスト上層膜にレジストパターンを形成し、該レジストパターンをマスクにして前記レジスト下層膜にドライエッチングでパターンを転写し、該パターンが転写されたレジスト下層膜をマスクにして前記有機下層膜にドライエッチングでパターンを転写し、更に該パターンが転写された有機下層膜をマスクにして前記被加工体にドライエッチングでパターンを転写することを特徴とするパターン形成方法。
- 前記被加工体として、半導体装置基板、又は該半導体装置基板に金属膜、金属炭化膜、金属酸化膜、金属窒化膜、金属酸化炭化膜、及び金属酸化窒化膜のいずれかが成膜されたものを用いることを特徴とする請求項5に記載のパターン形成方法。
- 前記被加工体を構成する金属が、ケイ素、チタン、タングステン、ハフニウム、ジルコニウム、クロム、ゲルマニウム、銅、銀、金、アルミニウム、インジウム、ガリウム、ヒ素、パラジウム、鉄、タンタル、イリジウム、モリブデン、又はこれらの合金を含むことを特徴とする請求項6に記載のパターン形成方法。
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JP7368342B2 (ja) | 2020-12-07 | 2023-10-24 | 信越化学工業株式会社 | ケイ素含有レジスト下層膜形成用組成物及びパターン形成方法 |
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TWI535708B (zh) | 2016-06-01 |
KR101831745B1 (ko) | 2018-02-23 |
US20160053087A1 (en) | 2016-02-25 |
TW201612166A (en) | 2016-04-01 |
JP6196194B2 (ja) | 2017-09-13 |
KR20160022251A (ko) | 2016-02-29 |
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