JP4491283B2 - 反射防止膜形成用組成物を用いたパターン形成方法 - Google Patents
反射防止膜形成用組成物を用いたパターン形成方法 Download PDFInfo
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- JP4491283B2 JP4491283B2 JP2004172222A JP2004172222A JP4491283B2 JP 4491283 B2 JP4491283 B2 JP 4491283B2 JP 2004172222 A JP2004172222 A JP 2004172222A JP 2004172222 A JP2004172222 A JP 2004172222A JP 4491283 B2 JP4491283 B2 JP 4491283B2
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- Prior art keywords
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- general formula
- polymer compound
- crosslinkable
- antireflection film
- Prior art date
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- 238000000034 method Methods 0.000 title claims description 66
- 239000000203 mixture Substances 0.000 title claims description 50
- 230000007261 regionalization Effects 0.000 title claims description 12
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- 229920000642 polymer Polymers 0.000 claims description 114
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- 239000010410 layer Substances 0.000 claims description 73
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- 239000000463 material Substances 0.000 claims description 54
- 125000000962 organic group Chemical group 0.000 claims description 51
- 239000000758 substrate Substances 0.000 claims description 43
- 238000004132 cross linking Methods 0.000 claims description 38
- 125000004432 carbon atom Chemical group C* 0.000 claims description 34
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- 239000003431 cross linking reagent Substances 0.000 claims description 24
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 23
- 125000000217 alkyl group Chemical group 0.000 claims description 21
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 19
- 125000003545 alkoxy group Chemical group 0.000 claims description 19
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 18
- 238000012545 processing Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 14
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- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 13
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- 238000005406 washing Methods 0.000 description 9
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- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 6
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- 125000006165 cyclic alkyl group Chemical group 0.000 description 6
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 6
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
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- 238000004528 spin coating Methods 0.000 description 6
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 description 6
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 5
- 0 COCC(*)CCC(C[C@@](C1)C2OC[C@]3OC3)=C1CC2OCC1OC1 Chemical compound COCC(*)CCC(C[C@@](C1)C2OC[C@]3OC3)=C1CC2OCC1OC1 0.000 description 5
- 229910002808 Si–O–Si Inorganic materials 0.000 description 5
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 5
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- 238000009833 condensation Methods 0.000 description 5
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- LJHFIVQEAFAURQ-ZPUQHVIOSA-N (NE)-N-[(2E)-2-hydroxyiminoethylidene]hydroxylamine Chemical class O\N=C\C=N\O LJHFIVQEAFAURQ-ZPUQHVIOSA-N 0.000 description 4
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- WVIIMZNLDWSIRH-UHFFFAOYSA-N cyclohexylcyclohexane Chemical group C1CCCCC1C1CCCCC1 WVIIMZNLDWSIRH-UHFFFAOYSA-N 0.000 description 4
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- DOEHJNBEOVLHGL-UHFFFAOYSA-N trichloro(propyl)silane Chemical compound CCC[Si](Cl)(Cl)Cl DOEHJNBEOVLHGL-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
- NBXZNTLFQLUFES-UHFFFAOYSA-N triethoxy(propyl)silane Chemical compound CCC[Si](OCC)(OCC)OCC NBXZNTLFQLUFES-UHFFFAOYSA-N 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
- AANIRNIRVXARSN-UHFFFAOYSA-M trifluoromethanesulfonate;trimethylsulfanium Chemical compound C[S+](C)C.[O-]S(=O)(=O)C(F)(F)F AANIRNIRVXARSN-UHFFFAOYSA-M 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
- 125000001889 triflyl group Chemical group FC(F)(F)S(*)(=O)=O 0.000 description 1
- JLGNHOJUQFHYEZ-UHFFFAOYSA-N trimethoxy(3,3,3-trifluoropropyl)silane Chemical compound CO[Si](OC)(OC)CCC(F)(F)F JLGNHOJUQFHYEZ-UHFFFAOYSA-N 0.000 description 1
- AWJONOIZIIUEOY-UHFFFAOYSA-N trimethyl naphthalen-1-yl silicate Chemical compound C1=CC=C2C(O[Si](OC)(OC)OC)=CC=CC2=C1 AWJONOIZIIUEOY-UHFFFAOYSA-N 0.000 description 1
- SMYXXSXVSQHRDQ-UHFFFAOYSA-N trimethyl phenyl silicate Chemical compound CO[Si](OC)(OC)OC1=CC=CC=C1 SMYXXSXVSQHRDQ-UHFFFAOYSA-N 0.000 description 1
- 125000003258 trimethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- FAYMLNNRGCYLSR-UHFFFAOYSA-M triphenylsulfonium triflate Chemical compound [O-]S(=O)(=O)C(F)(F)F.C1=CC=CC=C1[S+](C=1C=CC=CC=1)C1=CC=CC=C1 FAYMLNNRGCYLSR-UHFFFAOYSA-M 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
- 239000003021 water soluble solvent Substances 0.000 description 1
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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
- G03F7/075—Silicon-containing compounds
-
- 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
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/091—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers characterised by antireflection means or light filtering or absorbing means, e.g. anti-halation, contrast enhancement
-
- 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
- G03F7/039—Macromolecular compounds which are photodegradable, e.g. positive electron resists
-
- 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
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/11—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S438/00—Semiconductor device manufacturing: process
- Y10S438/942—Masking
- Y10S438/948—Radiation resist
- Y10S438/952—Utilizing antireflective layer
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Materials For Photolithography (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
- Silicon Polymers (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Description
i.下記一般式(P1a−1)、(P1a−2)、(P1a−3)又は(P1b)のオニウム塩、
ii.下記一般式(P2)のジアゾメタン誘導体、
iii.下記一般式(P3)のグリオキシム誘導体、
iv.下記一般式(P4)のビススルホン誘導体、
v.下記一般式(P5)のN−ヒドロキシイミド化合物のスルホン酸エステル、
vi.β−ケトスルホン酸誘導体、
vii.ジスルホン誘導体、
viii.ニトロベンジルスルホネート誘導体、
ix.スルホン酸エステル誘導体
3リットルのフラスコに超純水252g、エタノール770g、10%テトラメチルアンモニウムハイドロオキサイド水溶液440gを仕込み、窒素雰囲気下、30℃で3−アセトキシプロピルトリメトキシシラン27g、フェニルトリメトキシシラン14g、3−(2’−メトキシプロポキシ)プロピルトリメトキシシラン51gの混合液を加えてよく混合した。1時間後、ここに酢酸35gを加え、減圧下(100hPa)でエタノールとメタノールを留去した。残液にエチルアセテート900gを加え水層を分離後、有機層に超純300gを加えて洗浄する工程を5回繰り返した。この有機層にプロピレングリコールモノメチルエーテルアセテート200gを加えて減圧下(20hPa)で濃縮を行い重合体1の205gの溶液を得た。不揮発分16%であった。
1リットルのフラスコに超純水84g、エタノール256g、10%テトラメチルアンモニウムハイドロオキサイド水溶液29gを仕込み、窒素雰囲気下、30℃で2−アセトキシメチル−ビシクロ[2.2.1]ヘプタニルルトリメトキシシラン7.5g、フェニルトリメトキシシラン6.3g、3−(2’−メトキシプロポキシ)プロピルトリメトキシシラン22.4gの混合液を加えてよく混合した。1時間後、ここに酢酸1.6gを加え、減圧下(100hPa)でエタノールとメタノールを留去した。残液にエチルアセテート300を加え水層を分離後、有機層に超純70gを加えて洗浄する工程を5回繰り返した。この有機層にプロピレングリコールモノメチルエーテルアセテート100gを加えて減圧下(20hPa)で濃縮を行い重合体2の85gの溶液を得た。不揮発分28%であった。
3リットルのフラスコにエタノール595g、10%テトラメチルアンモニウムハイドロオキサイド水溶液75gを仕込み、窒素雰囲気下、30℃で3,4エポキシシクロヘキシルエチルトリメトキシシラン102g、テトラエトキシシラン71g、フェニルトリメトキシシラン35g、(2,3−ジメトキシプロポキシ)プロピルトリメトキシシラン44gの混合液を加えてよく混合した。1時間後、ここに酢酸27.5gを加え、減圧下(100hPa)でエタノールとメタノールを留去した。残液にエチルアセテート200gを加え水層を分離後、有機層に超純水240gを加えて洗浄する工程を3回繰り返した。この有機層にプロピレングリコールモノメチルエーテルアセテート600gを加えて減圧下(20hPa)で濃縮を行い重合体3の600gの溶液を得た。不揮発分は25wt%であった。
3リットルのフラスコにエタノール595g、10%テトラメチルアンモニウムハイドロオキサイド水溶液75gを仕込み、窒素雰囲気下、30℃で3,4エポキシシクロヘキシルエチルトリメトキシシラン93.4g、(2,3−ジメトキシプロポキシ)プロピルトリメトキシシラン109.6gの混合液を加えてよく混合した。1時間後、ここに酢酸10.0gを加え、減圧下(100hPa)でエタノールとメタノールを留去した。残液にエチルアセテート200gを加え水層を分離後、有機層に超純水240gを加えて洗浄する工程を3回繰り返した。この有機層にプロピレングリコールモノメチルエーテルアセテート600gを加えて減圧下(20hPa)で濃縮を行い600gの溶液を得た。不揮発分は25wt%であった。この溶液100gに安息香酸4.3gを加え100℃で12時間反応させて、重合体4の95gの溶液を得た。不揮発分は29.5wt%であった。
1リットルのフラスコに超純水120g、エタノール375g、10%テトラメチルアンモニウムハイドロオキサイド水溶液216gを仕込み、窒素雰囲気下、30℃で3−アセトキシプロピルトリメトキシシラン51.4g、フェニルトリメトキシシラン6.6gの混合液を加えてよく混合した。1時間後、ここに酢酸8gを加え、これから減圧下(100hPa)でエタノールとメタノールを留去した。残液にエチルアセテート450gを加え水層を分離後、有機層に超純水100gを加えて洗浄する工程を5回繰り返した。この有機層に乳酸エチル88gを加えて減圧下(20hPa)で濃縮を行い重合体5の100gの溶液を得た。不揮発分は14wt%であった。
重合体溶液5を25gと、重合体溶液1を82gとを混合し、重合体6の207gの溶液を得た。不揮発分は17%であった。
5リットルのフラスコに超純水1135g、エタノール1135g、10%テトラメチルアンモニウムハイドロオキサイド水溶液200gを仕込み、窒素雰囲気下、30℃でメチルトリメトキシシラン82g、テトラエトキシシラン125g、フェニルトリメトキシシラン24g、3−アセトキシプロピルトリメトキシシラン20gの混合液を加えてよく混合した。1時間後、ここに酢酸5.5gを加え、さらにプロピレングリコールモノメチルエーテルアセテートを880g加えた。これから減圧下(100hPa)でエタノールとメタノールを留去した。残液にエチルアセテート600gを加え水層を分離後、有機層に超純水600gを加えて洗浄する工程を3回繰り返した。この有機層にプロピレングリコールモノプロピルエーテル1200gを加えて減圧下(20hPa)で濃縮を行い重合体7の1000gの溶液を得た。不揮発分は10.5wt%であった。
3リットルのフラスコに超純水541g、エタノール1135g、10%テトラメチルアンモニウムハイドロオキサイド水溶液83gを仕込み、窒素雰囲気下、30℃で3,4エポキシシクロヘキシルエチルトリメトキシシラン145gを加えてよく混合した。1時間後、ここに酢酸6gを加え、さらにプロピレングリコールモノメチルエーテルアセテートを1000g加えた。これから減圧下(100hPa)でエタノールとメタノールを留去した。残液にエチルアセテート600gを加え水層を分離後、有機層に超純水600gを加えて洗浄する工程を3回繰り返した。この有機層を減圧下(20hPa)で濃縮を行い重合体1の1000gの溶液を得た。不揮発分は10.0wt%であった。この溶液に安息香酸22gを加えて100℃で12時間反応させた。その後プロピレングリコールモノメチルエーテル100gを加えて100℃で12時間反応させた。その後減圧下(20hPa)で未反応のプロピレングリコールモノメチルエーテルを留去し、重合体8の800gの溶液を得た。不揮発分は19.6wt%であった。
5リットルのフラスコに超純水915g、エタノール1884g、10%テトラメチルアンモニウムハイドロオキサイド水溶液103gを仕込み、窒素雰囲気下、40℃でメチルトリメトキシシラン434g、テトラエトキシシラン662gの混合液を加えてよく混合した。4時間後、ここに酢酸10gを加え、さらにプロピレングリコールモノメチルエーテルアセテートを1800g加えた。これから減圧下(100hPa)でエタノールとメタノールを留去した。残液にエチルアセテート1200gを加え水層を分離後、有機層に超純水1200gを加えて洗浄する工程を3回繰り返した。この有機層にプロピレングリコールモノプロピルエーテル2400gを加えて減圧下(20hPa)で濃縮を行い重合体9の2400gの溶液を得た。不揮発分は16.4wt%であった。
上記製造例1〜8で得られた重合体溶液を用いて、表1に示す酸発生剤、架橋剤を加え、溶媒で固形分(=重合体と酸発生剤と架橋剤)が10wt%となるように希釈し、孔径0.1μmのPTFE製濾過膜で濾過することにより反射防止膜材料を調製した。
重合体1〜8:製造例1〜8により得られたもの
架橋剤 :HMM(下記構造式参照)
酸発生剤 :BBI−109(みどり化学製酸発生剤)
界面活性剤 :スリーエム社製界面活性剤
有機溶剤 :PGMEA(プロピレングリコールモノメチルエーテルアセテート)
PnP(プロピレングリコールモノプロピルエーテル)
EL(乳酸エチル)
※ 架橋基量:シランの加水分解性基がすべてSi−O−Siに変化し、かつ架橋がすべて形成された場合の高分子量重合体1g中の架橋を形成する基のモル量
ArFフォトレジスト膜材料のベース樹脂として下記重合体(ポリマーA)を準備した。
酸発生剤:PAG1(下記構造式参照)
有機溶剤:PGMEA(プロピレングリコールモノメチルエーテルアセテート)
(1)パターン形状の観察
調製した反射防止膜材料(表1の実施例1〜5、比較例1〜3)をシリコン基板上に塗布して200℃で120秒間ベークして膜厚193nmの反射防止膜を形成した。
前記反射防止膜材料(実施例1〜5、比較例1〜3)から形成した反射防止膜、及び前記フォトレジスト膜材料(レジスト1)及び製造例9で製造したシリコーンから形成した低誘電率膜について、以下のような条件で評価した。
東京エレクトロン株式会社製ドライエッチング装置TE−8500Pを用い、エッチング前後の反射防止膜、レジスト膜、SiO2膜の膜厚差を測定した。エッチング条件は下記に示す通りである。結果を表4に示す。
RFパワー 1,300W
ギャップ 9mm
CHF3ガス流量 30ml/min
CF4ガス流量 30ml/min
Arガス流量 100ml/min
時間 10sec
SiO2量(wt%):シランの加水分解性基がすべてSi−O−Siに変化し、かつ架橋がすべて形成された場合の高分子量重合体中のケイ素原子とケイ素原子に直接結合した酸素原子の重量%
前記反射防止膜材料(実施例1〜5、比較例1〜3)から形成した反射防止膜及び製造例9で製造したシリコーンから形成した低誘電率膜のストリップ液に対する溶解性試験を行った。試験片は下記の2水準で処理した。
処理条件A :ストリップ後 処理なし
処理条件B :大気下で350℃、15分加熱
ストリップ液 :EKC−2255(EKCテクノロジー社製、塩基性剥離液)
:DHF(1%希フッ酸水溶液)
ストリップ条件:EKC−225550℃、10分浸漬
DHF、20℃、3分
前記反射防止膜材料(実施例1〜5、比較例1〜3)から形成した反射防止膜を熱処理し、ストリップ性を測定した。
ベーク条件 :200℃/120秒
熱処理条件 :大気下で180℃/15分、300℃/15分、400℃/15分、450℃/15分
ストリップ液 :EKC−2255( EKC テクノロジー社製、塩基性剥離液)
ストリップ条件 :50℃ 10分浸漬
測定項目 :膜厚減少量(nm)
[IRによる焼成膜の観察]
表6の実施例1の材料を焼成した際のFT−IRを測定した。測定条件は以下の通りである。
測定装置:日本電子製、FT−IR測定装置、JIR−5500
測定方法:反射防止膜を設けていないシリコン基板と、反射防止膜を設けたシリコン基板との差分を測定。
2 低誘電率膜
3 反射防止膜
3’ 有機基が熱分解した反射防止膜
4 フォトレジスト膜
Claims (14)
- リソグラフィーにより基板又は該基板上の被加工層にパターンを形成する方法であって、
少なくとも該基板又は該基板上の被加工層上に、下記一般式(1)で表される共重合による繰り返し単位Ua、Ub、Ucを含んでなる高分子化合物
と、有機溶剤と、酸発生剤とを含有し、上記一般式(1)で表される高分子化合物中の珪素原子と珪素原子に直接結合した酸素原子との質量比が、高分子化合物中の比として20質量%以上70質量%以下である反射防止膜形成用組成物を塗布する工程と、
前記反射防止膜形成用組成物に含まれる高分子化合物中の光吸収基及び/又は架橋性基及び/又は非架橋性基が分解し、該高分子化合物から解離する温度より低い温度、時間内で、該高分子化合物を架橋させて反射防止膜層を形成する工程と、
該反射防止膜層上にフォトレジスト膜材料を塗布する工程と、
該フォトレジスト膜材料をプリベークしてフォトレジスト膜を形成する工程と、
該反射防止膜層上にフォトレジスト層のパターン回路領域を露光した後、現像液で現像して該レジスト膜にレジストパターンを形成する工程と、
該レジストパターンが形成されたフォトレジスト層をマスクにして該反射防止膜層及び該基板又は該基板上の被加工層を加工する工程と、
前記架橋された高分子化合物の光吸収基及び/又は架橋性基及び/又は非架橋性基が分解する温度より高い温度であって、かつSiCが形成されない条件で熱処理する工程と、
レジスト膜と反射防止膜層を除去する工程と
を含むパターン形成方法。 - 上記一般式(1)のR1aの変性が、R1aのエポキシ基にカルボン酸を反応させてエステル基と水酸基に変性すること、R1aの水酸基にアルコールを反応させてエーテルに変性すること、及びR1aの水酸基にカルボン酸を反応させてエステルに変性することから選ばれる請求項2に記載のパターン形成方法。
- 上記一般式(1)で示される高分子化合物をさらに含有する請求項2又は請求項3に記載のパターン形成方法。
- 上記一般式(1)におけるR1aが、エポキシ基及び/又は水酸基を有する請求項1〜4のいずれかに記載のパターン形成方法。
- 上記一般式(1)及び/又は一般式(2)におけるR5が、置換又は非置換の炭化水素基、オキシアルキル基、カルボオキシアルキル基から選ばれる基を含む請求項1〜6のいずれかに記載のパターン形成方法。
- 上記一般式(1)及び/又は一般式(2)におけるR5が、アルキルオキシ基が置換されたプロピル基又はエチルシクロヘキシル基である請求項1〜6のいずれかに記載のパターン形成方法。
- 上記一般式(1)及び/又は一般式(2)におけるR2が、アントラセン環、ナフタレン環又はベンゼン環を含む請求項1〜8のいずれかに記載のパターン形成方法。
- 上記一般式(1)及び/又は一般式(2)で示される高分子化合物に含まれる架橋性の有機基の濃度が、1mmol/高分子化合物固形分1g〜7mmol/高分子化合物固形分1gである請求項1〜9のいずれかに記載のパターン形成方法。
- 架橋剤をさらに含有する請求項1〜10のいずれかに記載のパターン形成方法。
- 前記レジスト膜と反射防止膜層とを除去する方法がウエットストリップである請求項1〜11のいずれかに記載のパターン形成方法。
- 前記高分子化合物中の光吸収基及び/又は架橋性基及び/又は非架橋性基を分解させるための熱処理の温度が、180℃から400℃である請求項1〜12のいずれかに記載のパターン形成方法。
- 前記基板上の被加工層が、比誘電率2.7以下の低誘電率膜である請求項1〜13のいずれかに記載のパターン形成方法。
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US7541134B2 (en) | 2009-06-02 |
TW200604735A (en) | 2006-02-01 |
TWI312443B (en) | 2009-07-21 |
KR20060046423A (ko) | 2006-05-17 |
US20050277058A1 (en) | 2005-12-15 |
JP2005352104A (ja) | 2005-12-22 |
KR101097963B1 (ko) | 2011-12-23 |
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