JP2017021337A - レジスト下層膜材料、パターン形成方法、及び化合物 - Google Patents
レジスト下層膜材料、パターン形成方法、及び化合物 Download PDFInfo
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- JP2017021337A JP2017021337A JP2016122267A JP2016122267A JP2017021337A JP 2017021337 A JP2017021337 A JP 2017021337A JP 2016122267 A JP2016122267 A JP 2016122267A JP 2016122267 A JP2016122267 A JP 2016122267A JP 2017021337 A JP2017021337 A JP 2017021337A
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Images
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2/00—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms
- C07C2/86—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon
- C07C2/861—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation between a hydrocarbon and a non-hydrocarbon the non-hydrocarbon contains only halogen as hetero-atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C39/00—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring
- C07C39/02—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring monocyclic with no unsaturation outside the aromatic ring
- C07C39/04—Phenol
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C39/00—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring
- C07C39/12—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring polycyclic with no unsaturation outside the aromatic rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C39/00—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring
- C07C39/12—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring polycyclic with no unsaturation outside the aromatic rings
- C07C39/17—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring polycyclic with no unsaturation outside the aromatic rings containing other rings in addition to the six-membered aromatic rings, e.g. cyclohexylphenol
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
- C07C49/29—Saturated compounds containing keto groups bound to rings
- C07C49/313—Saturated compounds containing keto groups bound to rings polycyclic
- C07C49/323—Saturated compounds containing keto groups bound to rings polycyclic having keto groups bound to condensed ring systems
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
- C07C49/587—Unsaturated compounds containing a keto groups being part of a ring
- C07C49/657—Unsaturated compounds containing a keto groups being part of a ring containing six-membered aromatic rings
- C07C49/665—Unsaturated compounds containing a keto groups being part of a ring containing six-membered aromatic rings a keto group being part of a condensed ring system
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D303/00—Compounds containing three-membered rings having one oxygen atom as the only ring hetero atom
- C07D303/02—Compounds containing oxirane rings
- C07D303/04—Compounds containing oxirane rings containing only hydrogen and carbon atoms in addition to the ring oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D493/00—Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system
- C07D493/02—Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system in which the condensed system contains two hetero rings
- C07D493/10—Spiro-condensed systems
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G61/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G61/02—Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
- C08G8/02—Condensation polymers of aldehydes or ketones with phenols only of ketones
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Abstract
Description
本発明では、下記一般式(4)で示される化合物を提供する。
本発明のレジスト下層膜材料は、必須成分として、インデノフルオレン構造(特にはインデノ[1,2−b]フルオレン構造)を有する化合物を含有するものであり、好ましくは、以下の三つのうちいずれか一つ以上を含有するものである。また、もちろん、これらのうち二つあるいは三つ全てを含んでもよい。
(a)上記一般式(1)で示される化合物X
(b)複数個の化合物Xが直接、あるいは炭素数1〜10のアルキレン基を含んでもよい炭素数6〜28のアリーレン基を介して結合した化合物Y
(c)化合物X及び/又は化合物Yを含む材料を縮合して得られる縮合物
本発明のレジスト下層膜材料に含まれるインデノ[1,2−b]フルオレン構造を有する化合物は、上記一般式(1)で示される化合物Xであってもよい。このような化合物Xとして、具体的には以下の化合物が挙げられるが、もちろんこれらに限定されるものではない。
本発明のレジスト下層膜材料に含まれるインデノ[1,2−b]フルオレン構造を有する化合物は、複数個の上記化合物Xが直接、あるいは炭素数1〜10のアルキレン基を含んでもよい炭素数6〜28のアリーレン基を介して結合した化合物Yであってもよい。このような化合物Yとしては、例えば以下の化合物が挙げられるが、もちろんこれらに限定されるものではない。
本発明のレジスト下層膜材料に含まれるインデノ[1,2−b]フルオレン構造を有する化合物は、上記の化合物X及び/又は上記の化合物Yを含む材料を縮合して得られる縮合物であってもよい。このような縮合物としては、下記一般式(3)で示される繰り返し単位を有する樹脂が特に好ましい。
(有機溶剤)
本発明のレジスト下層膜材料には、有機溶剤を配合してもよい。本発明のレジスト下層膜材料に使用可能な有機溶剤としては、上記のインデノフルオレン構造を有する化合物、及び後述の酸発生剤、架橋剤、その他添加剤等が溶解するものであれば特に制限はない。具体的には、シクロヘキサノン、シクロペンタノン、メチル−2−アミルケトン等のケトン類;3−メトキシブタノール、3−メチル−3−メトキシブタノール、1−メトキシ−2−プロパノール、1−エトキシ−2−プロパノール等のアルコール類;プロピレングリコールモノメチルエーテル、エチレングリコールモノメチルエーテル、プロピレングリコールモノエチルエーテル、エチレングリコールモノエチルエーテル、プロピレングリコールジメチルエーテル、ジエチレングリコールジメチルエーテル等のエーテル類;プロピレングリコールモノメチルエーテルアセテート、プロピレングリコールモノエチルエーテルアセテート、乳酸エチル、ピルビン酸エチル、酢酸ブチル、3−メ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、酢酸tert−ブチル、プロピオン酸tert−ブチル、プロピレングリコールモノtert−ブチルエーテルアセテート等のエステル類が挙げられ、これらの1種を単独であるいは2種以上を混合して使用できるが、これらに限定されるものではない。本発明のレジスト下層膜材料においては、これらの有機溶剤の中でも、特にジエチレングリコールジメチルエーテルや1−エトキシ−2−プロパノール、乳酸エチル、プロピレングリコールモノメチルエーテルアセテート、及びこれらの混合溶剤が好ましい。
また、本発明のレジスト下層膜材料には、架橋反応を促進させるための酸発生剤を添加することができる。酸発生剤は熱分解によって酸を発生するものや、光照射によって酸を発生するものがあるが、いずれのものも添加することができる。このような酸発生剤としては、具体的には、特開2007−199653号公報の(0061)〜(0085)段落に記載されている材料を挙げることができる。
また、本発明のレジスト下層膜材料には、架橋反応を促進させるための架橋剤を添加することができる。このような架橋剤としては、具体的には、メチロール基、アルコキシメチル基、アシロキシメチル基から選ばれる少なくとも一つの基で置換されたメラミン化合物、グアナミン化合物、グリコールウリル化合物、又はウレア化合物、エポキシ化合物、イソシアネート化合物、アジド化合物、アルケニルエーテル基などの二重結合を含む化合物等を挙げることができる。これらは添加剤として用いてもよいが、インデノ[1,2−b]フルオレン構造を有する化合物側鎖にペンダント基として導入してもよい。また、ヒドロキシ基を含む化合物も架橋剤として用いることができる。
[2層プロセス]
本発明では、リソグラフィーにより基板にパターンを形成する方法であって、(A1)前記基板上に、上述の本発明のレジスト下層膜材料を用いてレジスト下層膜を形成する工程、(A2)該レジスト下層膜上に、フォトレジスト膜を形成する工程、(A3)該フォトレジスト膜に対して露光及び現像を行ってフォトレジストパターンを形成する工程、(A4)該フォトレジストパターンをマスクにしてドライエッチングを行い、前記レジスト下層膜にパターンを転写する工程、及び(A5)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基板を加工する工程、を有するパターン形成方法を提供する。
また、本発明では、リソグラフィーにより基板にパターンを形成する方法であって、(B1)前記基板上に、上述の本発明のレジスト下層膜材料を用いてレジスト下層膜を形成する工程、(B2)該レジスト下層膜上に、珪素、チタン、ジルコニウム、ハフニウム、タングステン、アルミニウム、ゲルマニウム、スズ、及びクロムから選ばれる元素を含有する金属中間膜を形成する工程、(B3)該金属中間膜上に、フォトレジスト膜を形成する工程、(B4)該フォトレジスト膜に対して露光及び現像を行ってフォトレジストパターンを形成する工程、(B5)該フォトレジストパターンをマスクにしてドライエッチングを行い、前記金属中間膜にパターンを転写する工程、(B6)該パターンが転写された金属中間膜をマスクにしてドライエッチングを行い、前記レジスト下層膜にパターンを転写する工程、及び(B7)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基板を加工する工程、を有するパターン形成方法を提供する。
また、本発明では、リソグラフィーにより基板にパターンを形成する方法であって、(C1)前記基板上に、上述の本発明のレジスト下層膜材料を用いてレジスト下層膜を形成する工程、(C2)該レジスト下層膜上に、珪素、チタン、ジルコニウム、ハフニウム、タングステン、アルミニウム、ゲルマニウム、スズ、及びクロムから選ばれる元素を含有する金属中間膜を形成する工程、(C3)該金属中間膜上に、有機反射防止膜を形成する工程、(C4)該有機反射防止膜上に、フォトレジスト膜を形成する工程、(C5)該フォトレジスト膜に対して露光及び現像を行ってフォトレジストパターンを形成する工程、(C6)該フォトレジストパターンをマスクにしてドライエッチングを行い、前記有機反射防止膜及び前記金属中間膜にパターンを転写する工程、(C7)該パターンが転写された金属中間膜をマスクにしてドライエッチングを行い、前記レジスト下層膜にパターンを転写する工程、及び(C8)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基板を加工する工程、を有するパターン形成方法を提供する。
また、本発明では、リソグラフィーにより基板にパターンを形成する方法であって、(D1)前記基板上に、上述の本発明のレジスト下層膜材料を用いてレジスト下層膜を形成する工程、(D2)該レジスト下層膜上に、珪素、チタン、ジルコニウム、ハフニウム、タングステン、アルミニウム、ゲルマニウム、スズ、及びクロムから選ばれる元素を含有する金属中間膜を形成する工程、(D3)該金属中間膜上に、炭化水素膜を形成する工程、(D4)該炭化水素膜上に、珪素含有膜を形成する工程、(D5)該珪素含有膜上に、フォトレジスト膜を形成する工程、(D6)該フォトレジスト膜に対して露光及び現像を行ってフォトレジストパターンを形成する工程、(D7)該フォトレジストパターンをマスクにしてドライエッチングを行い、前記珪素含有膜にパターンを転写する工程、(D8)該パターンが転写された珪素含有膜をマスクにしてドライエッチングを行い、前記炭化水素膜にパターンを転写する工程、(D9)該パターンが転写された炭化水素膜をマスクにしてドライエッチングを行い、前記金属中間膜にパターンを転写する工程、(D10)該パターンが転写された金属中間膜をマスクにしてドライエッチングを行い、前記レジスト下層膜にパターンを転写する工程、及び(D11)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基板を加工する工程、を有するパターン形成方法を提供する。
「合成例1] 化合物X1の合成
IR(ATR法):ν=3327,3059,2972,2929,1632,1604,1541,1506,1480,1442,1384,1370,1275,1250,1216,1195,1174,1151,1098,997,962,901,875,859,808cm−1
1H−NMR(600MHz in DMSO−d6):δ=9.68(4H,−OH),8.17(2H,s),7.95(2H,d),7.61(4H,d),7.57(4H,d),7.54(4H,s),7.47(2H,d),7.33〜7.37(6H,m),7.33(2H,T−d),7.06(4H,s−d),6.99(4H,d−d)ppm
13C−NMR(150MHz in DMSO−d6):δ=155.34,151.18,151.09,139.77,139.69,139.55,133.39,129.46,127.68,127.57,127.28,127.11,126.32,126.16,125.50,120.73,118.68,118.10,108.31,64.54ppm
IR(ATR法):ν=3517,3045,1611,1509,1474,1443,1427,1331,1292,1261,1173,1108,873,834cm−1
1H−NMR(600MHz in DMSO−d6):δ=9.29(4H,−OH),7.85〜7.89(4H,m),7.29〜7.33(4H,m),7.25(2H,t−d),6.98(8H,m),6.64(8H,m)ppm
13C−NMR(150MHz in DMSO−d6):δ=155.96,152.01,151.51,139.28,139.23,136.12,128.81,127.42,127.16,125.90,120.39,117.61,114.93,63.30ppm
IR(ATR法):ν=3317,3057,1631,1608,1574,1520,1479,1443,1379,1352,1277,1260,1197,1154,1104,953,856,818cm−1
1H−NMR(600MHz in DMSO−d6):δ=)8.67(4H,d),8.60(4H,−OH),7.71〜7.74(4H,m),7.27(4H,d−d),7.08(2H,m),7.00〜7.10(12H,m),6.35(4H,d)ppm
13C−NMR(150MHz in DMSO−d6):δ=157.43,157.35,157.29,146.94,141.52,140.67,136.37,128.65,128.22,126.79,126.68,123.85,123.34,120.88,119.89,118.87,118.57,116.26,109.96,54.68ppm
上記の化合物X1〜X5、及びノボラック樹脂1の代わりに比較例で使用するものとして、下記繰り返し単位からなる比較ノボラック樹脂1、2、及び下記構造式で示される比較モノマー1、2を用意した。
レジスト下層膜材料に配合するブレンド用のモノマーとして、下記に示されるブレンド下層膜モノマー1〜3を用意した。
[レジスト下層膜材料の調製]
上記の化合物X1〜X5、ノボラック樹脂1、ブレンド下層膜モノマー1〜3、比較ノボラック樹脂1、2、比較モノマー1、2、及び下記の酸発生剤TAG1を、FC−4430(住友スリーエム社製)0.1質量%を含む有機溶剤中に表1に示す割合で溶解させ、孔径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、レジスト下層膜材料(下層膜材料1〜9、比較下層膜材料1〜4)をそれぞれ調製した。
CyH(シクロヘキサン)
上記のようにして調製した下層膜材料1〜9、比較下層膜材料1〜4をシリコン基板上に塗布して、ホットプレート上で大気中350℃で60秒間ベークし、その後窒素気流中ホットプレート上で450℃で60秒間ベークしてそれぞれ膜厚80nmのレジスト下層膜(実施例1−1〜1−9、比較例1−1〜1−4)を形成した。レジスト下層膜の形成後、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(VASE)で波長193nmにおける屈折率(n値、k値)を求めた。結果を表1に示す。
下記のArF珪素含有中間膜ポリマー1で示される樹脂、及び架橋触媒1を、FC−4430(住友スリーエム社製)0.1質量%を含む有機溶剤中に表2に示す割合で溶解させ、孔径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、珪素含有中間膜材料1を調製した。
上記のようにして調製した珪素含有中間膜材料1をシリコン基板上に塗布して、200℃で60秒間ベークして膜厚40nmの珪素含有中間膜を形成した。珪素含有中間膜の形成後、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(VASE)で波長193nmにおける屈折率(n値、k値)を求めた。結果を表2に示す。
下記のレジストポリマー1、撥水性ポリマー1、酸発生剤PAG1、及びQuencher1を、FC−4430(住友スリーエム社製)0.1質量%を含む有機溶剤中に表3に示す割合で溶解させ、孔径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、ArF露光用のレジスト上層膜材料(ArFレジスト1)を調製した。
膜厚100nmのSiO2膜が形成された直径300mmのSiウェハー基板上に、上記のレジスト下層膜材料(下層膜材料1〜9、比較下層膜材料1〜4)を塗布して大気中350℃で60秒間ベークし、その後窒素気流中450℃で60秒間ベークして、膜厚80nmのレジスト下層膜を形成した。その上に、上記の珪素含有中間膜材料1を塗布し、200℃で60秒間ベークして膜厚35nmの珪素含有中間膜を形成した。その上に、上記のArFレジスト1を塗布し、105℃で60秒間ベークして膜厚80nmのフォトレジスト膜を形成した。次いで、ArF液浸露光装置((株)ニコン製;NSR−S610C、NA=1.30、σ=0.98/0.65、35度ダイポールs偏光照明、6%ハーフトーン位相シフトマスク)でフォトレジスト膜を露光し、100℃で60秒間ベーク(PEB)した後、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30秒間現像することで、40nm 1:1のポジ型のラインアンドスペースパターンを得た。
(フォトレジストパターンの珪素含有中間膜への転写条件)
チャンバー圧力 10.0Pa
RFパワー 1,500W
CF4ガス流量 15sccm(mL/min)
O2ガス流量 75sccm(mL/min)
処理時間 15sec
チャンバー圧力 2.0Pa
RFパワー 500W
Arガス流量 75sccm(mL/min)
O2ガス流量 45sccm(mL/min)
処理時間 120sec
チャンバー圧力 2.0Pa
RFパワー 2,200W
C5F12ガス流量 20sccm(mL/min)
C2F6ガス流量 10sccm(mL/min)
Arガス流量 300sccm(mL/min)
O2ガス流量 60sccm(mL/min)
処理時間 90sec
Si基板上に厚さ500nmで直径が160nmの密集ホールパターンが形成されているSiO2段差基板上に、上記のレジスト下層膜材料(下層膜材料1〜9、比較下層膜材料1〜4)を、平坦な基板上で80nmの膜厚になるような条件で塗布し、塗布後、350℃で60秒間ベークしてレジスト下層膜を形成した。このようにしてレジスト下層膜を形成した基板を割断し、ホールの底までレジスト下層膜が埋め込まれているかどうかを走査型電子顕微鏡(SEM)で観察した。結果を表5に示す。
Si基板上に、上記のレジスト下層膜材料(下層膜材料1〜9、比較下層膜材料1〜4)を塗布し、350℃で60秒間ベークして膜厚80nmのレジスト下層膜を形成し、この350℃のベーク中にホットプレートオーブン内部に発生する0.3μmサイズのパーティクルと0.5μmサイズのパーティクルの数をリオン社製パーティクルカウンターKR−11Aを用いて測定した。結果を表6に示す。
4’…フォトレジストパターン、 5…露光部分、 6…金属中間膜、
7…有機反射防止膜、 8…炭化水素膜、 9…珪素含有膜。
Claims (11)
- リソグラフィーで用いられるレジスト下層膜材料であって、インデノフルオレン構造を有する化合物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材料。
- 前記インデノフルオレン構造を有する化合物が、下記一般式(1)で示される化合物X、複数個の前記化合物Xが直接、あるいは炭素数1〜10のアルキレン基を含んでもよい炭素数6〜28のアリーレン基を介して結合した化合物Y、及び前記化合物X及び/又は前記化合物Yを含む材料を縮合して得られる縮合物のいずれか一つ以上であることを特徴とする請求項1に記載のレジスト下層膜材料。
- 前記化合物Xが、下記一般式(2)で示される化合物であることを特徴とする請求項2に記載のレジスト下層膜材料。
- 前記縮合物が、下記一般式(3)で示される繰り返し単位を有する樹脂であることを特徴とする請求項2に記載のレジスト下層膜材料。
- 前記レジスト下層膜材料が、更に、有機溶剤を含有するものであることを特徴とする請求項1から請求項4のいずれか一項に記載のレジスト下層膜材料。
- 前記レジスト下層膜材料が、更に、酸発生剤及び/又は架橋剤を含有するものであることを特徴とする請求項1から請求項5のいずれか一項に記載のレジスト下層膜材料。
- リソグラフィーにより基板にパターンを形成する方法であって、
(A1)前記基板上に、請求項1から請求項6のいずれか一項に記載のレジスト下層膜材料を用いてレジスト下層膜を形成する工程、
(A2)該レジスト下層膜上に、フォトレジスト膜を形成する工程、
(A3)該フォトレジスト膜に対して露光及び現像を行ってフォトレジストパターンを形成する工程、
(A4)該フォトレジストパターンをマスクにしてドライエッチングを行い、前記レジスト下層膜にパターンを転写する工程、及び
(A5)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基板を加工する工程、
を有することを特徴とするパターン形成方法。 - リソグラフィーにより基板にパターンを形成する方法であって、
(B1)前記基板上に、請求項1から請求項6のいずれか一項に記載のレジスト下層膜材料を用いてレジスト下層膜を形成する工程、
(B2)該レジスト下層膜上に、珪素、チタン、ジルコニウム、ハフニウム、タングステン、アルミニウム、ゲルマニウム、スズ、及びクロムから選ばれる元素を含有する金属中間膜を形成する工程、
(B3)該金属中間膜上に、フォトレジスト膜を形成する工程、
(B4)該フォトレジスト膜に対して露光及び現像を行ってフォトレジストパターンを形成する工程、
(B5)該フォトレジストパターンをマスクにしてドライエッチングを行い、前記金属中間膜にパターンを転写する工程、
(B6)該パターンが転写された金属中間膜をマスクにしてドライエッチングを行い、前記レジスト下層膜にパターンを転写する工程、及び
(B7)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基板を加工する工程、
を有することを特徴とするパターン形成方法。 - リソグラフィーにより基板にパターンを形成する方法であって、
(C1)前記基板上に、請求項1から請求項6のいずれか一項に記載のレジスト下層膜材料を用いてレジスト下層膜を形成する工程、
(C2)該レジスト下層膜上に、珪素、チタン、ジルコニウム、ハフニウム、タングステン、アルミニウム、ゲルマニウム、スズ、及びクロムから選ばれる元素を含有する金属中間膜を形成する工程、
(C3)該金属中間膜上に、有機反射防止膜を形成する工程、
(C4)該有機反射防止膜上に、フォトレジスト膜を形成する工程、
(C5)該フォトレジスト膜に対して露光及び現像を行ってフォトレジストパターンを形成する工程、
(C6)該フォトレジストパターンをマスクにしてドライエッチングを行い、前記有機反射防止膜及び前記金属中間膜にパターンを転写する工程、
(C7)該パターンが転写された金属中間膜をマスクにしてドライエッチングを行い、前記レジスト下層膜にパターンを転写する工程、及び
(C8)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基板を加工する工程、
を有することを特徴とするパターン形成方法。 - リソグラフィーにより基板にパターンを形成する方法であって、
(D1)前記基板上に、請求項1から請求項6のいずれか一項に記載のレジスト下層膜材料を用いてレジスト下層膜を形成する工程、
(D2)該レジスト下層膜上に、珪素、チタン、ジルコニウム、ハフニウム、タングステン、アルミニウム、ゲルマニウム、スズ、及びクロムから選ばれる元素を含有する金属中間膜を形成する工程、
(D3)該金属中間膜上に、炭化水素膜を形成する工程、
(D4)該炭化水素膜上に、珪素含有膜を形成する工程、
(D5)該珪素含有膜上に、フォトレジスト膜を形成する工程、
(D6)該フォトレジスト膜に対して露光及び現像を行ってフォトレジストパターンを形成する工程、
(D7)該フォトレジストパターンをマスクにしてドライエッチングを行い、前記珪素含有膜にパターンを転写する工程、
(D8)該パターンが転写された珪素含有膜をマスクにしてドライエッチングを行い、前記炭化水素膜にパターンを転写する工程、
(D9)該パターンが転写された炭化水素膜をマスクにしてドライエッチングを行い、前記金属中間膜にパターンを転写する工程、
(D10)該パターンが転写された金属中間膜をマスクにしてドライエッチングを行い、前記レジスト下層膜にパターンを転写する工程、及び
(D11)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基板を加工する工程、
を有することを特徴とするパターン形成方法。
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US20170018436A1 (en) | 2017-01-19 |
US10156788B2 (en) | 2018-12-18 |
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KR102138403B1 (ko) | 2020-07-27 |
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