JP2022101465A - フォトレジスト接着および線量低減のための下層 - Google Patents
フォトレジスト接着および線量低減のための下層 Download PDFInfo
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- 125000000913 palmityl group Chemical group [H]C([*])([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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- LFKDJXLFVYVEFG-UHFFFAOYSA-N tert-butyl carbamate Chemical compound CC(C)(C)OC(N)=O LFKDJXLFVYVEFG-UHFFFAOYSA-N 0.000 description 1
- UTYRQCFTOYUATF-UHFFFAOYSA-N tert-butyl(chloro)silane Chemical compound CC(C)(C)[SiH2]Cl UTYRQCFTOYUATF-UHFFFAOYSA-N 0.000 description 1
- IPGXXWZOPBFRIZ-UHFFFAOYSA-N tert-butyl(silyl)silane Chemical compound CC(C)(C)[SiH2][SiH3] IPGXXWZOPBFRIZ-UHFFFAOYSA-N 0.000 description 1
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- QIMILRIEUVPAMG-UHFFFAOYSA-N tert-butylsilyl carbamate Chemical compound C(N)(O[SiH2]C(C)(C)C)=O QIMILRIEUVPAMG-UHFFFAOYSA-N 0.000 description 1
- VDZOOKBUILJEDG-UHFFFAOYSA-M tetrabutylammonium hydroxide Chemical class [OH-].CCCC[N+](CCCC)(CCCC)CCCC VDZOOKBUILJEDG-UHFFFAOYSA-M 0.000 description 1
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- MZIYQMVHASXABC-UHFFFAOYSA-N tetrakis(ethenyl)stannane Chemical compound C=C[Sn](C=C)(C=C)C=C MZIYQMVHASXABC-UHFFFAOYSA-N 0.000 description 1
- XJPKDRJZNZMJQM-UHFFFAOYSA-N tetrakis(prop-2-enyl)stannane Chemical compound C=CC[Sn](CC=C)(CC=C)CC=C XJPKDRJZNZMJQM-UHFFFAOYSA-N 0.000 description 1
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 description 1
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- ALVYUZIFSCKIFP-UHFFFAOYSA-N triethoxy(2-methylpropyl)silane Chemical compound CCO[Si](CC(C)C)(OCC)OCC ALVYUZIFSCKIFP-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
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- QYYZHXHYNLXWAW-UHFFFAOYSA-N trimethyl(2-phenylethynyl)stannane Chemical compound C[Sn](C)(C)C#CC1=CC=CC=C1 QYYZHXHYNLXWAW-UHFFFAOYSA-N 0.000 description 1
- COHOGNZHAUOXPA-UHFFFAOYSA-N trimethyl(phenyl)stannane Chemical compound C[Sn](C)(C)C1=CC=CC=C1 COHOGNZHAUOXPA-UHFFFAOYSA-N 0.000 description 1
- WXRGABKACDFXMG-UHFFFAOYSA-N trimethylborane Chemical compound CB(C)C WXRGABKACDFXMG-UHFFFAOYSA-N 0.000 description 1
- MXSVLWZRHLXFKH-UHFFFAOYSA-N triphenylborane Chemical compound C1=CC=CC=C1B(C=1C=CC=CC=1)C1=CC=CC=C1 MXSVLWZRHLXFKH-UHFFFAOYSA-N 0.000 description 1
- 125000005580 triphenylene group Chemical group 0.000 description 1
- NHDIQVFFNDKAQU-UHFFFAOYSA-N tripropan-2-yl borate Chemical compound CC(C)OB(OC(C)C)OC(C)C NHDIQVFFNDKAQU-UHFFFAOYSA-N 0.000 description 1
- VOSJXMPCFODQAR-UHFFFAOYSA-N trisilylamine group Chemical group [SiH3]N([SiH3])[SiH3] VOSJXMPCFODQAR-UHFFFAOYSA-N 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- FZFRVZDLZISPFJ-UHFFFAOYSA-N tungsten(6+) Chemical compound [W+6] FZFRVZDLZISPFJ-UHFFFAOYSA-N 0.000 description 1
- 238000009489 vacuum treatment Methods 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
- H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
- H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
- H01L21/02274—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition in the presence of a plasma [PECVD]
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/04—Coating on selected surface areas, e.g. using masks
- C23C16/047—Coating on selected surface areas, e.g. using masks using irradiation by energy or particles
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/26—Deposition of carbon only
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/50—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges
- C23C16/505—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges using radio frequency discharges
-
- 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
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/22—Masks or mask blanks for imaging by radiation of 100nm or shorter wavelength, e.g. X-ray masks, extreme ultraviolet [EUV] masks; Preparation thereof
-
- 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
- G03F7/0042—Photosensitive materials with inorganic or organometallic light-sensitive compounds not otherwise provided for, e.g. inorganic resists
-
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- Toxicology (AREA)
- Chemical Vapour Deposition (AREA)
- Materials For Photolithography (AREA)
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- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Formation Of Insulating Films (AREA)
Abstract
Description
PCTリクエストフォームが、本願の一部として本明細書と同時に提出される。同時に提出されるPCTリクエストフォームで特定されるように本願が利益または優先権を主張する各出願は、参照によって本明細書にそれらの全体が全ての目的で組み込まれる。
下層は、任意の有用な方法で蒸着可能である。一例において、蒸着は、炭化水素前駆体または炭素含有前駆体(例えば、本明細書に記載の任意のもの)の蒸着を含む。蒸着は、蒸着中の(例えば、プラズマとしてまたは不活性ガスとしての)処理ガスの利用を含みうる。ここで、非限定的な処理ガスは、一酸化炭素(CO)、ヘリウム(He)、アルゴン(Ar)、クリプトン(Kr)、ネオン(Ne)、窒素(N2)、および/または、水素(H2)を含む。
さらなる処理が、下層のエッチング耐性を改善するめに開発された。特に、バイアス電力が、下層の密度を変更するために用いられた。例えば、下層の蒸着は、約1%~99%のDCで(例えば、約1Hz~約10kHzの範囲で)パルス化された(周波数にかかわらない)バイアスを含みうる。かかるバイアスは、約10~500Wなど、任意の有効電力で提供されうる。
下層は、1または複数のドーパント(例えば、炭化水素が用いられる場合、非炭素ドーパント)を含んでよい。ドーパントは、(例えば、炭素原子を提供するための)炭化水素前駆体と、(例えば、ドーピング非炭素原子を提供するための)別個のドーパント前駆体と、を用いて提供されてよい。別の実施形態において、ドーパントは、炭素原子およびヘテロ原子を含む単一のドーパント前駆体を用いて提供される。非限定的な非炭素ヘテロ原子は、酸素(O)、シリコン(Si)、窒素(N)、タングステン(W)、ホウ素(B)、ヨウ素(I)、塩素(Cl)、または、これらの任意の組みあわせを含む。その他のドーパントおよびヘテロ原子含有ドーパント前駆体についても、本明細書に記載されている。
下層は、任意の有用な前駆体で蒸着されうる。例えば、前駆体は、炭素原子および水素原子のみを有する炭化水素前駆体を含んでよい。別の例において、前駆体は、炭素原子、水素原子、および、非炭素へテロ原子を有するヘテロ原子含有炭化水素前駆体であってもよい。さらに別の例において、前駆体は、(例えば、本明細書に記載するように)ドーパント前駆体であってもよい。
また、下層は、高パターニング放射線吸収断面積(例えば、1×107cm2/モル以上のEUV吸収断面積)を有する1または複数の原子を含んでよい。かかる原子は、例えば、ヨウ素(I)を含む。ヨウ素は、任意の有用な供給源で供給されうる。例えば、蒸着中に用いられる前駆体は、1または複数のヨウ素原子を有する炭化水素であるドーパント前駆体であってよい。非限定的な前駆体は、1または複数のI原子を有する脂肪族化合物または芳香族化合物(例えば、アルカン、アルケン、または、アルキン(それらの環状形態を含む)、ならびに、ベンゼン)を含む。さらに他の前駆体の例は、ヨードアセチレン(C2HI)、ジヨードアセチレン(C2I2)、ヨウ化ビニル(C2H3I)、ヨードメタン(CH3I)、ジヨードメタン(CH2I2)、1,1-ジヨードエテン(C2H2I2)、(E)-1,2-ジヨードエチレン(trans-C2H2I2)、(Z)-1,2-ジヨードエチレン(cis-C2H2I2)、ヨウ化アリル(C3H5I)、1-ヨード-1-プロピン(C3H3I)、ヨードシクロプロパン(C3H5I)、および、1,1-ジヨードシクロプロパン(C3H4I2)を含む。
本明細書の下層は、任意の有用な前駆体または前駆体の組みあわせを利用できる。かかる前駆体は、炭素(C)および水素(H)原子のみを含む炭化水素前駆体を含んでよく、ここで、前駆体は、飽和(単結合のみを有する)でも不飽和(1または複数の二重結合または三重結合を有する)でもよく、直鎖でも環状鎖でもよい。さらに他の前駆体は、1または複数の非炭素ヘテロ原子を含んでよく、かかる前駆体は、本明細書ではドーパント前駆体と呼ばれる。かかるドーパント前駆体は、非炭素原子と組み合わせて炭素原子を任意選択的に含んでよい。いくつかの実施形態において、本明細書の任意の炭化水素前駆体が、ドーパント前駆体を提供するために1または複数のヘテロ原子で修飾されてよい。一般用語「前駆体」は、炭化水素前駆体および/またはドーパント前駆体のことを指しうる。かかる前駆体は、いくつかの例において、気体であることにより、処理チャンバ内での蒸着を可能にしうる。
本明細書の任意の処理および前駆体はいずれも、有用な下層(下地層)を提供するために利用できる。下層の組成は、特定の原子を含むよう調整できる。一実施形態において、下層は、0~30原子%のO(例えば、1~30%、2~30%、または、4~30%)、約20~50原子%のH(例えば、20~45%、30~50%、または、30~45%)、および/または、30~70原子%のC(例えば、30~60%、30~65%、または、30~68%)を含む。他の実施形態において、下層は、不飽和結合(例えば、C=C、C≡C、および/または、C≡N結合)を含む。さらに他の実施形態において、下層は、約0.7~2.9g/cm3の密度を有する。
本明細書のパターニング構造(または膜)は、ハードマスクまたは基板の表面上のイメージング層と、イメージング層の下の下層と、を含みうる。特定の実施形態において、下層の存在は、イメージング層の放射線吸収率および/またはパターニング性能を高める。
MaRb(I)、
ここで、
Mは、高EUV吸収断面積を有する金属または原子であり、
各Rは、独立していて、H、ハロ、任意選択的に置換されたアルキル、任意選択的に置換されたシクロアルキル、任意選択的に置換されたシクロアルケニル、任意選択的に置換されたアルケニル、任意選択的に置換されたアルキニル、任意選択的に置換されたアルコキシ、任意選択的に置換されたアルカノイルオキシ、任意選択的に置換されたアリール、任意選択的に置換されたアミノ、任意選択的に置換されたビス(トリアルキルシリル)アミノ、任意選択的に置換されたトリアルキルシリル、オキソ、アニオン性配位子、中性配位子、または、多座配位子、であり、
a≧1、b≧1、である。
MaRbLc(II)、
ここで、
Mは、高EUV吸収断面積を有する金属または原子であり、
各Rは、独立していて、ハロ、任意選択的に置換されたアルキル、任意選択的に置換されたアリール、任意選択的に置換されたアミノ、任意選択的に置換されたアルコキシ、または、Lであり、
各Lは、独立していて、配位子、アニオン性配位子、中性配位子、多座配位子、イオン、または、対反応物と反応するその他の部分であり、ここで、RおよびLはMと共に一緒に、任意選択的にヘテロシクリル基を形成し、または、RおよびLが一緒に、任意選択的にヘテロシクリル基を形成しえ、
a≧1、b≧1、および、c≧1、である。
MaLc(IIa)、
ここで、
Mは、高EUV吸収断面積を有する金属または原子であり、
各Lは、独立していて、対反応物と反応する配位子、イオン、または、その他の部分であり、ここで、2つのLは一緒に、任意選択的にヘテロシクリル基を形成しえ、
a≧1、および、c≧1、である。
化学式(IIa)の特定の実施形態において、aは、1である。さらなる実施形態において、cは、2、3、または、4である。
MXn(III)、
ここで、Mは金属であり、Xはハロであり、nは、Mの選択に応じて2~4である。Mの金属の例は、Sn、Te、Bi、または、Sbを含む。金属ハロゲン化物の例は、SnBr4、SnCl4、SnI4、および、SbCl3を含む。
MRn(IV)、
ここで、Mは金属であり、各Rは、独立していて、H、任意選択的に置換されたアルキル、アミノ(例えば、-NR2、ここで、各Rは、独立していて、アルキルである)、任意選択的に置換されたビス(トリアルキルシリル)アミノ(例えば、-N(SiR3)2、ここで、各Rは、独立していて、アルキルである)、もしくは、任意選択的に置換されたトリアルキルシリル(例えば、-SiR3、ここで、各Rは、独立していて、アルキルである)、であり、nは、Mの選択に応じて2~4である。Mの金属の例は、Sn、Te、Bi、または、Sbを含む。アルキル基は、CnH2n+1であってよく、ここで、nは、1、2、3、または、4以上である。有機金属剤の例は、SnMe4、SnEt4、TeRn、RTeR、t-ブチルテルルヒドリド(Te(t-Bu)(H))、ジメチルテルル(TeMe2)、ジ(t-ブチル)テルル(Te(t-Bu)2))、ジ(イソプロピル)テルル(Te(i-Pr)2)、ビス(トリメチルシリル)テルル(Te(SiMe3)2)、ビス(トリエチルシリル)テルル(Te(SiEt3)2)、トリス(ビス(トリメチルシリル)アミド)ビスマス(Bi[N(SiMe3)2]3)、Sb(NMe2)3、などを含む。
MLn(V)、
ここで、Mは金属であり、各Lは、独立していて、任意選択的に置換されたアルキル、アミノ(例えば、-NR1R2、ここで、R1およびR2の各々は、Hまたはアルキル(本明細書に記載されている任意のものなど)であってよい)、アルコキシ(例えば、-OR、ここで、Rは、アルキル(本明細書に記載されている任意のものなど)である)、ハロ、もしくは、その他の有機置換基であり、nは、Mの選択に応じて2~4である。Mの金属の例は、Sn、Te、Bi、または、Sbを含む。配位子の例は、ジアルキルアミノ(例えば、ジメチルアミノ、メチルエチルアミノ、および、ジエチルアミノ)、アルコキシ(例えば、t-ブトキシおよびイソプロポキシ)、ハロ(例えば、F、Cl、Br、および、I)、もしくは、その他の有機置換基(例えば、アセチルアセトンまたはN2,N3-ジ-tert-ブチル-ブタン-2,3-ジアミノ)を含む。非限定的なキャッピング剤は、SnCl4、SnI4、Sn(NR2)4(ここで、Rの各々は、独立していて、メチルまたはエチルである)、もしくは、Sn(t-BuO)4、を含む。いくつかの実施形態において、複数タイプの配位子が存在する。
RnMXm(VI)、
ここで、Mは金属であり、Rは、C2-12アルキル、または、ベータ水素を有する置換アルキルであり、Xは、露出ヒドロキシル基の内のヒドロキシル基との反応時に適切な脱離基である。様々な実施形態において、n=1~3であり、m=4-n、3-n、または、2-nである(ただし、m>0(すなわち、m≧1)である)。例えば、Rは、t-ブチル、t-ペンチル、t-ヘキシル、シクロヘキシル、イソプロピル、イソブチル、sec-ブチル、n-ブチル、n-ペンチル、n-ヘキシル、または、ベータ位にヘテロ原子置換基を有するそれらの誘導体、であってよい。適切なヘテロ原子は、ハロゲン(F、Cl、Br、または、I)もしくは酸素(-OHまたは-OR)を含む。Xは、ジアルキルアミノ(例えば、ジメチルアミノ、メチルエチルアミノ、または、ジエチルアミノ)、アルコキシ(例えば、t-ブトキシ、イソプロポキシ)、ハロ(例えば、F、Cl、Br、または、I)、もしくは、別の有機配位子、であってよい。ヒドロカルビル置換キャッピング剤の例は、t-ブチルトリス(ジメチルアミノ)スズ(Sn(t-Bu)(NMe2)3)、n-ブチルトリス(ジメチルアミノ)スズ(Sn(n-Bu)(NMe2)3)、t-ブチルトリス(ジエチルアミノ)スズ(Sn(t-Bu)(NEt2)3)、ジ(t-ブチル)ジ(ジメチルアミノ)スズ(Sn(t-Bu)2(NMe2)2)、sec-ブチルトリス(ジメチルアミノ)スズ(Sn(s-Bu)(NMe2)3)、n-ペンチルトリス(ジメチルアミノ)スズ(Sn(n-ペンチル)(NMe2)3)、i-ブチルトリス(ジメチルアミノ)スズ(Sn(i-Bu)(NMe2)3)、i-プロピルトリス(ジメチルアミノ)スズ(Sn(i-Pr)(NMe2)3)、t-ブチルトリス(t-ブトキシ)スズ(Sn(t-Bu)(t-BuO)3)、n-ブチル(トリス(t-ブトキシ)スズ(Sn(n-Bu)(t-BuO)3)、または、イソプロピルトリス(t-ブトキシ)スズ(Sn(i-Pr)(t-BuO)3)、を含む。
MaRbLc(VII)、
ここで、Mは金属であり、Rは、任意選択的に置換されたアルキルであり、Lは、対反応物と反応する配位子、イオン、または、その他の部分であり、a≧1、b≧1、および、c≧1、である。特定の実施形態において、a=1、および、b+c=4、である。いくつかの実施形態において、Mは、Sn、Te、Bi、または、Sbである。特定の実施形態において、各Lは、独立していて、アミノ(例えば、-NR1R2、ここで、R1およびR2の各々は、Hまたはアルキル(本明細書に記載されている任意のものなど)であってよい)、アルコキシル(例えば、-OR、ここで、Rは、アルキル(本明細書に記載されている任意のものなど)であってよい)、もしくは、ハロ(例えば、F、Cl、Br、または、I)である。有機金属剤の例は、SnMe3Cl、SnMe2Cl2、SnMeCl3、SnMe(NMe2)3、SnMe2(NMe2)2、SnMe3(NMe2)、などを含む。
MaLc(VIII)、
ここで、Mは金属であり、Lは、対反応物と反応する配位子、イオン、または、その他の部分であり、a≧1、および、c≧1、である。特定の実施形態において、c=nー1であり、nは、2、3、または、4である。いくつかの実施形態において、Mは、Sn、Te、Bi、または、Sbである。対反応物は、少なくとも2つの金属原子を化学結合で結合させるために、反応性のある部分、配位子、または、イオン(例えば、本明細書の化学式の中のL)と置き換わることができるのが好ましい。
EUVリソグラフィは、EUVレジストを利用し、EUVレジストは、液体ベースのスピンオン技術によって生成されたポリマ系の化学増幅レジストまたは乾式蒸着技術によって生成された金属酸化物系のレジストであってよい。かかるEUVレジストは、本明細書に記載の任意のEUV感受性膜または材料を含みうる。リソグラフィ法は、例えば、フォトパターンを形成するためにEUV放射線でEUVレジストを露光することによって、レジストをパターニングする工程と、その後に、マスクを形成するためにフォトパターンに従ってレジストの一部を除去することによってパターンを現像する工程と、を含みうる。
本明細書で論じられているように、本開示は、EUVまたはその他の次世代リソグラフィ技術を用いてパターニングされうる半導体基板上に下層およびイメージング層を形成するための方法を提供している。いくつかの実施形態において、乾式蒸着が、任意の有用な前駆体(例えば、本明細書に記載の炭化水素前駆体、ドーパント前駆体、金属ハロゲン化物、キャッピング剤、または、有機金属剤)を用いて、下層およびイメージング層を提供できる。方法は、重合された有機金属材料が蒸気中で生成されて下層の上に蒸着される方法を含む。他の実施形態において、スピンオン配合が用いられてもよい。蒸着処理は、レジスト膜またはEUV感受性膜としてEUV感受性材料を塗布する工程を含んでよい。
膜のEUV露光は、金属原子(M)を含む活性化された反応中心を有するEUV露光領域を提供でき、それらの反応中心は、EUVによる開裂事象によって生成される。かかる反応中心は、金属ダングリングボンド、M-H基、開裂したM-配位子基、二量体化したM-M結合、または、M-O-M架橋、を含みうる。
EUV露光領域または非露光領域は、任意の有用な現像処理によって除去されうる。一実施形態において、EUV露光領域は、金属ダングリングボンド、M-H基、または、二量体化したM-M結合など、活性化された反応中心を有しうる。特定の実施形態において、M-H基が、1または複数の乾式現像処理(例えば、ハロゲン化物化学作用)を用いて選択的に除去されうる。他の実施形態において、M-M結合が、湿式現像処理を用いて(例えば、可溶性のM(OH)n基を提供するために高温のエタノールおよび水を利用して)選択的に除去されうる。さらに他の実施形態において、EUV露光領域が、湿式現像を用いて(例えば、ポジティブトーン現像剤を用いて)除去される。いくつかの実施形態において、EUV非露光領域が、乾式現像を用いて除去される。
本明細書の方法は、以下に記載するように、任意の有用な塗布後処理を含んでよい。
また、本開示は、本明細書に記載の任意の方法を実行するよう構成されている任意の装置も含む。一実施形態において、膜を蒸着するための装置は、下層および/またはイメージング層を提供するために1または複数の前駆体を蒸着するためのチャンバを備えた蒸着モジュールと、30nm未満の波長の放射線源を有するEUVフォトリソグラフィツールを備えたパターニングモジュールと、かかる層を含む膜を現像するためのチャンバを備えた現像モジュールと、を備える。
本明細書で交換可能に用いられている「アシルオキシ」または「アルカノイルオキシ」は、オキシ基を介して親分子基に結合した本明細書で定義のアシル基またはアルカノイル基を意味する。特定の実施形態において、アルカノイルオキシは、-O-C(O)-Akであり、ここで、Akは、本明細書で定義のアルキル基である。いくつかの実施形態において、非置換アルカノイルオキシは、C2-7アルカノイル基である。アルカノイル基の例は、アセトキシを含む。
基板(例えば、ハードマスク)とフォトレジストとの間の接着性を高め、および/または、EUVリソグラフィ中に効果的なフォトレジスト露光のためのEUV線量を低減するよう構成されているフォトレジスト下層を組み込むためのパターニング構造およびスキーム、ならびに、関連する処理および装置が、開示および説明されている。
Claims (33)
- パターニング構造であって、
基板の上に配置されている放射線感受性のイメージング層と、
前記基板と前記イメージング層との間に配置されている下層と、
を備え、
前記下層は、
前記基板と前記イメージング層との間の接着性を高め、
前記イメージング層の効果的なフォトレジスト露光のための放射線量を低減するよう構成されている、パターニング構造。 - 請求項1に記載のパターニング構造であって、前記イメージング層は、極紫外線(EUV)感受性の無機フォトレジスト層、化学蒸着(CVD)膜、スピンオン膜、または、酸化スズ膜を含む、パターニング構造。
- 請求項1に記載のパターニング構造であって、前記基板は、ハードマスク、非晶質炭素膜、ホウ素(B)でドープされた非晶質炭素膜、タングステン(W)でドープされた非晶質炭素膜、非晶質水素化炭素膜、酸化シリコン膜、窒化シリコン膜、酸窒化シリコン膜、炭化シリコン膜、ホウ窒化シリコン膜、非晶質シリコン膜、ポリシリコン膜、または、それらの組み合わせ、であり、または、を含む、パターニング構造。
- 請求項1から3のいずれか一項に記載のパターニング構造であって、前記下層は、25nm以下の厚さまたは約2~20nmの厚さを有する、パターニング構造。
- 請求項1または4に記載のパターニング構造であって、前記下層は、酸素(O)、シリコン(Si)、窒素(N)、タングステン(W)、ホウ素(B)、ヨウ素(I)、塩素(Cl)、または、これらの内の任意の2つ以上の組み合わせ、でドープされた水素化炭素を含み、任意選択的に、前記ヨウ素でドープされた水素化炭素は、放射線への露光時に二次電子の発生を改善するよう構成される、パターニング構造。
- 請求項5に記載のパターニング構造であって、前記下層は、約0~30原子%の酸素(O)および/または約20~50原子%の水素(H)を含み、ならびに/もしくは、前記下層の表面は、ヒドロキシル基、カルボキシル基、ペルオキシ基、sp2炭素、sp炭素、および/または、不飽和炭素含有結合、を含む、パターニング構造。
- 請求項1から6に記載のパターニング構造であって、前記下層は、約0.7~2.9g/cm3の密度を備え、任意選択的に、前記下層は、さらに、増大したエッチング選択比を提供し、任意選択的に、前記下層は、さらに、減少したラインエッジラフネスおよびライン幅ラフネスならびに/もしくは減少した線量対サイズを提供する、パターニング構造。
- 請求項1から7に記載のパターニング構造であって、前記下層は、さらに、放射線への露光時に放出されるよう構成されているベータ水素原子、および/または、前記イメージング層内の原子への酸素結合を形成するよう構成されている酸素原子を備える、パターニング構造。
- パターニング構造であって、
製造途中の半導体デバイス膜スタックを備える基板と、
前記基板の上に配置されている放射線感受性のイメージング層と、
前記基板と前記イメージング層との間に配置されている下層と、
を備え、
前記下層は、酸素(O)、シリコン(Si)、窒素(N)、タングステン(W)、ホウ素(B)、ヨウ素(I)、塩素(Cl)、または、これらの内の任意の2つ以上の組み合わせ、でドープされた水素化炭素の蒸着膜を備え、
前記膜は、25nm以下の厚さまたは約2~20nmの厚さを有する、パターニング構造。 - 請求項9に記載のパターニング構造であって、前記基板は、さらに、前記基板上に配置されている任意選択的にドープされた非晶質炭素ハードマスクを備える、パターニング構造。
- 請求項10に記載のパターニング構造であって、前記下層は、約0~30原子%の酸素(O)および/または約20~50原子%の水素(H)を含む、パターニング構造。
- パターニング構造を形成する方法であって、
基板を準備し、
前記基板上に下層を蒸着させ、前記下層は、前記基板と前記フォトレジストとの間の接着性を高め、および/または、効果的なフォトレジスト露光のための放射線量を低減するよう構成され、
前記下層上に放射線感受性のイメージング層を形成すること、
を備える、方法。 - 請求項12に記載の方法であって、
前記基板は、製造途中の半導体デバイス膜スタックであり、
前記基板は、ハードマスク、非晶質炭素膜、非晶質水素化炭素膜、酸化シリコン膜、窒化シリコン膜、酸窒化シリコン膜、炭化シリコン膜、ホウ窒化シリコン膜、非晶質シリコン膜、ポリシリコン膜、または、それらの組み合わせ、であり、または、を含み、
前記イメージング層は、酸化スズ系フォトレジストまたは水酸化酸化スズ系フォトレジストを含み、
前記下層は、酸素(O)、シリコン(Si)、窒素(N)、タングステン(W)、ホウ素(B)、ヨウ素(I)、塩素(Cl)、または、これらの内の任意の2つ以上の組み合わせ、でドープされた水素化炭素の蒸着膜を備え、前記膜は、25nm以下の厚さを有する、方法。 - 請求項13に記載の方法であって、前記下層は、オキソカーボン前駆体の存在下または非存在下で炭化水素前駆体を用いて前記基板上に蒸着され、それにより、炭素含有膜を提供し、任意選択的に、前記オキソカーボン前駆体は、水素(H2)または炭化水素と共反応し、任意選択的に、シリコン(Si)源ドーパントとさらに共反応する、方法。
- 請求項14に記載の方法であって、前記炭化水素前駆体は、アルカン、アルケン、または、アルキンを含む、方法。
- 請求項14に記載の方法であって、前記下層は、窒素含有前駆体、タングステン含有前駆体、ホウ素含有前駆体、および/または、ヨウ素含有前駆体の存在下で前記炭化水素前駆体を用いて蒸着され、それにより、ドープ膜を提供する、方法。
- 請求項16に記載の方法であって、前記ドープ膜は、ヨウ素、ヨウ素およびシリコンの組み合わせ、もしくは、ヨウ素、シリコン、および、窒素の組み合わせ、を含む、方法。
- 請求項13に記載の方法であって、前記下層は、酸化剤と共反応するシリコン(Si)含有前駆体を用いて前記基板上に蒸着され、前記Si含有前駆体は、任意選択的に、炭素(C)源ドーパントとさらに共反応する、方法。
- 請求項12から18に記載の方法であって、前記蒸着させることは、さらに、0W~約1000Wのバイアス電力でバイアスを印加し、約5%~100%のデューティサイクルを利用すること、を含む、方法。
- 請求項19に記載の方法であって、前記バイアスを印加すること、前記バイアスを印加することなしに形成された下層と比べて高い密度を有する前記下層を提供する、方法。
- 請求項12から19のいずれか一項に記載の方法であって、前記下層は、前記基板への蒸着の終了動作として、PECVDによって前記基板上に蒸着される、方法。
- 請求項12から19のいずれか一項に記載の方法であって、前記下層は、プラズマ強化化学蒸着(PECVD)または原子層蒸着(ALD)によって前記基板上に蒸着される、方法。
- 請求項12から22のいずれか一項に記載の方法であって、さらに、前記蒸着させた後に、粗面を提供するために前記下層を改質し、任意選択的に、酸素含有表面を提供するために前記下層または前記粗面を酸素含有プラズマに暴露させること、を備える、方法。
- 下層を蒸着させる方法であって、
処理チャンバ内に基板を準備し、
プラズマ強化化学蒸着(PECVD)処理によって、前記基板の表面上に水素化炭素膜を蒸着させること、
を備え、
前記水素化炭素膜は、低密度膜である、方法。 - 請求項24に記載の方法であって、前記PECVD処理は、メタン(CH4)、アセチレン(C2H2)、エチレン(C2H4)、プロピレン(C3H6)、プロピン(C3H4)、アレン(C3H4)、シクロプロペン(C3H4)、ブタン(C4H10)、シクロヘキサン(C6H12)、ベンゼン(C6H6)、および、トルエン(C7H8)、から選択された炭素含有前駆体を導入することを含む、方法。
- 請求項25に記載の方法であって、前記PECVD処理は、さらに、窒素含有前駆体、タングステン含有前駆体、ホウ素含有前駆体、および/または、ヨウ素含有前駆体を導入することにより、ドープ膜を提供することを含む、方法。
- 請求項24に記載の方法であって、前記PECVD処理は、トランス結合プラズマ(TCP)または誘導結合プラズマ(ICP)を含む、方法。
- 請求項27に記載の方法であって、TCP電力が、バイアスなしで約100~1000Wである、方法。
- 請求項27に記載の方法であって、前記PECVD処理は、さらに、約10~1000mTorrの圧力および/または約0~100℃の温度を含む、方法。
- 請求項27に記載の方法であって、前記PECVD処理は、さらに、約10~1000Wの電力を有する印加パルスバイアス、または、約10~500Wの電力を有する印加連続波バイアスを含む、方法。
- 請求項30に記載の方法であって、前記印加パルスバイアスは、約1~99%のデューティサイクルと、約10~2000Hzのパルス化周波数と、を備える、方法。
- 請求項24から31に記載の方法であって、さらに、前記蒸着させた後に、粗面を提供するために前記水素化炭素膜を改質し、任意選択的に、酸素含有表面を提供するために前記粗面を酸素含有プラズマに暴露させること、を備える、方法。
- 基板を処理するための装置であって、
基板支持体を備える処理チャンバと、
前記処理チャンバおよび関連する流量制御ハードウェアに接続されている処理ガス源と、
前記処理チャンバに接続されている基板ハンドリングハードウェアと、
プロセッサおよびメモリを有するコントローラと、
を備え、
前記プロセッサおよび前記メモリは、互いに通信可能に接続され、前記プロセッサは、前記流量制御ハードウェアおよび前記基板ハンドリングハードウェアと少なくとも動作可能に接続され、前記メモリは、請求項12から32のいずれか一項の方法に記載された操作を実行するためのコンピュータ実行可能な命令を格納している、装置。
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