JP2015079885A - 金属配線層形成方法、金属配線層形成装置および記憶媒体 - Google Patents
金属配線層形成方法、金属配線層形成装置および記憶媒体 Download PDFInfo
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- JP2015079885A JP2015079885A JP2013216745A JP2013216745A JP2015079885A JP 2015079885 A JP2015079885 A JP 2015079885A JP 2013216745 A JP2013216745 A JP 2013216745A JP 2013216745 A JP2013216745 A JP 2013216745A JP 2015079885 A JP2015079885 A JP 2015079885A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 128
- 239000002184 metal Substances 0.000 title claims abstract description 128
- 238000000034 method Methods 0.000 title claims abstract description 62
- 238000003860 storage Methods 0.000 title claims description 13
- 239000003054 catalyst Substances 0.000 claims abstract description 157
- 239000000758 substrate Substances 0.000 claims abstract description 116
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 86
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 86
- 239000010937 tungsten Substances 0.000 claims abstract description 86
- 238000007747 plating Methods 0.000 claims description 23
- 239000007822 coupling agent Substances 0.000 claims description 22
- 239000003795 chemical substances by application Substances 0.000 claims description 19
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 13
- 238000010304 firing Methods 0.000 claims description 13
- 238000004590 computer program Methods 0.000 claims description 4
- 229910052763 palladium Inorganic materials 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 15
- 239000002105 nanoparticle Substances 0.000 description 15
- 239000006087 Silane Coupling Agent Substances 0.000 description 10
- 239000010949 copper Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000000126 substance Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
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- 239000002270 dispersing agent Substances 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910001432 tin ion Inorganic materials 0.000 description 3
- 229920002873 Polyethylenimine Polymers 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000002296 dynamic light scattering Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002082 metal nanoparticle Substances 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 2
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 2
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 2
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 2
- QEMXHQIAXOOASZ-UHFFFAOYSA-N tetramethylammonium Chemical compound C[N+](C)(C)C QEMXHQIAXOOASZ-UHFFFAOYSA-N 0.000 description 2
- 238000009623 Bosch process Methods 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000033444 hydroxylation Effects 0.000 description 1
- 238000005805 hydroxylation reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- KAHVZNKZQFSBFW-UHFFFAOYSA-N n-methyl-n-trimethylsilylmethanamine Chemical compound CN(C)[Si](C)(C)C KAHVZNKZQFSBFW-UHFFFAOYSA-N 0.000 description 1
- 150000002941 palladium compounds Chemical class 0.000 description 1
- MUJIDPITZJWBSW-UHFFFAOYSA-N palladium(2+) Chemical compound [Pd+2] MUJIDPITZJWBSW-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
- H01L21/76877—Filling of holes, grooves or trenches, e.g. vias, with conductive material
- H01L21/76879—Filling of holes, grooves or trenches, e.g. vias, with conductive material by selective deposition of conductive material in the vias, e.g. selective C.V.D. on semiconductor material, plating
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- C—CHEMISTRY; METALLURGY
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- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
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- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
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- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
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- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
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- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76802—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics
- H01L21/76814—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing by forming openings in dielectrics post-treatment or after-treatment, e.g. cleaning or removal of oxides on underlying conductors
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- H01L21/76801—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the dielectrics, e.g. smoothing
- H01L21/76822—Modification of the material of dielectric layers, e.g. grading, after-treatment to improve the stability of the layers, to increase their density etc.
- H01L21/76826—Modification of the material of dielectric layers, e.g. grading, after-treatment to improve the stability of the layers, to increase their density etc. by contacting the layer with gases, liquids or plasmas
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- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
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- H01L21/76841—Barrier, adhesion or liner layers
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- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76871—Layers specifically deposited to enhance or enable the nucleation of further layers, i.e. seed layers
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Abstract
Description
以下、図1乃至図4により本発明の第1の実施の形態について説明する。
次に図5および図6により本発明の第2の実施の形態について説明する。
3 凹部
3a 底面
3b 表面
5 触媒層
7 金属配線層
10 金属配線層形成装置
11 酸化膜除去部
12 触媒層形成部
13 触媒層焼成部
14 金属配線層形成部
16 シリル化剤付与部
17 密着層形成部
20 制御装置
21 記憶媒体
W タングステン層
Claims (16)
- 基板に対して金属配線層を形成する金属配線層形成方法において、
絶縁層を含む凹部を有するとともに、凹部の底面にタングステン層が形成された基板を準備する工程と、
凹部の絶縁層の表面に触媒層を形成することなく、凹部の底面のタングステン層上に触媒層を形成する工程と、
凹部内の触媒層上に金属配線層をめっき処理により形成する工程とを備えたことを特徴とする金属配線層形成方法。 - 凹部の底面のタングステン層上に触媒層を形成する前に、凹部の底面および絶縁層の表面に密着層を形成することなく、タングステン層表面の酸化膜を除去することを特徴とする請求項1記載の金属配線層形成方法。
- 凹部の底面のタングステン層上に触媒層を形成した後に、触媒層を焼成して固めることを特徴とする請求項1または2記載の金属配線層形成方法。
- 触媒層はパラジウム系触媒層からなり、金属配線層はNi系配線層からなることを特徴とする請求項1乃至3のいずれか記載の金属配線層形成方法。
- 基板に対して金属配線層を形成する金属配線層形成方法において、
絶縁層を含む凹部を有するとともに凹部の底面にタングステン層が形成された基板を準備する工程と、
基板の凹部内にシリル化剤を付与して、凹部の絶縁層の表面にカップリング剤が付着することなく底面のタングステン層にカップリング剤が付着する状態とする工程と、
基板の凹部内にカップリング剤を付与して凹部の絶縁層の表面に密着層を形成することなく、凹部の底面のタングステン層に密着層を形成する工程と、
凹部の側面に触媒層を形成することなく、凹部の底面のタングステン層上に触媒層を形成する工程と、
凹部内の触媒層上に金属配線層をめっき処理により形成する工程とを備えたことを特徴とする金属配線層形成方法。 - 基板の凹部内にシリル化剤を付与する前に、タングステン層表面の酸化膜を除去することを特徴とする請求項5記載の金属配線層形成方法。
- 凹部の底面のタングステン層上に触媒層を形成した後に、触媒層を焼成して固めることを特徴とする請求項5または6記載の金属配線層形成方法。
- 触媒層はパラジウム系触媒層からなり、金属配線層はNi系配線層からなることを特徴とする請求項5乃至7のいずれか記載の金属配線層形成方法。
- 基板に対して金属線層を形成する金属配線層形成装置において、
絶縁層を含む凹部を有するとともに、凹部の底面にタングステン層が形成された基板に対し、凹部の絶縁層の表面に触媒層を形成することなく、凹部の底面のタングステン層上に触媒層を形成する触媒層形成部と、
凹部内の触媒層上に金属配線層をめっき処理により形成する金属配線層形成部とを備えたことを特徴とする金属配線層形成装置。 - 触媒層形成部の前段にタングステン層表面の酸化膜を除去する酸化膜除去部を設けたことを特徴とする請求項9記載の金属配線層形成装置。
- 触媒層形成部と金属配線層形成部との間に、触媒層を焼成して固める触媒層焼成部を設けたことを特徴とする請求項9または10記載の金属配線層形成装置。
- 基板に対して金属線層を形成する金属配線層形成装置において、
底面と側面とを含む凹部を有するとともに凹部の底面にタングステン層が形成された基板に対し、基板の凹部内にシリル化剤を付与して、凹部の絶縁層の表面にカップリング剤が付着することなく底面のタングステン層にカップリング剤が付着する状態とするシリル化剤付与部と、
基板の凹部内にカップリング剤を付与して凹部の側面に密着層を形成することなく、凹部の底面のタングステン層に密着層を形成する密着層形成部と、
凹部の側面に触媒層を形成することなく、凹部の底面のタングステン層上に触媒層を形成する触媒層形成部と、
凹部内の触媒層上に金属配線層をめっき処理により形成する金属配線層形成部と、を備えたことを特徴とする金属配線層形成装置。 - シリル化剤付与部の前段に、タングステン層表面の酸化膜を除去する酸化膜除去部を設けたことを特徴とする請求項12記載の金属配線層形成装置。
- 触媒層形成部と金属配線層形成部との間に、触媒層を焼成して固める触媒層焼成部を設けたことを特徴とする請求項12または13記載の金属配線層形成装置。
- コンピュータに金属配線層形成方法を実行させるためのコンピュータプログラムを格納した記憶媒体において、
金属配線層形成方法は、
底面と側面とを含む凹部を有するとともに、凹部の底面にタングステン層が形成された基板を準備する工程と、
凹部の側面に触媒層を形成することなく、凹部の底面のタングステン層上に触媒層を形成する工程と、
凹部内の触媒層上に金属配線層をめっき処理により形成する工程とを備えたことを特徴とする記憶媒体。 - コンピュータに金属配線層形成方法を実行させるためのコンピュータプログラムを格納した記憶媒体において、
金属配線層形成方法は、
底面と側面とを含む凹部を有するとともに凹部の底面にタングステン層が形成された基板を準備する工程と、
基板の凹部内にシリル化剤を付与して、凹部の側面にカップリング剤が付着することなく底面のタングステン層にカップリング剤が付着する状態とする工程と、
基板の凹部内にカップリング剤を付与して凹部の側面に密着層を形成することなく、凹部の底面のタングステン層に密着層を形成する工程と、
凹部の側面に触媒層を形成することなく、凹部の底面のタングステン層上に触媒層を形成する工程と、
凹部内の触媒層上に金属配線層をめっき処理により形成する工程とを備えたことを特徴とする記憶媒体。
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