JP7278164B2 - ルテニウム膜の形成方法及び基板処理システム - Google Patents
ルテニウム膜の形成方法及び基板処理システム Download PDFInfo
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- JP7278164B2 JP7278164B2 JP2019129545A JP2019129545A JP7278164B2 JP 7278164 B2 JP7278164 B2 JP 7278164B2 JP 2019129545 A JP2019129545 A JP 2019129545A JP 2019129545 A JP2019129545 A JP 2019129545A JP 7278164 B2 JP7278164 B2 JP 7278164B2
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- chlorine
- ruthenium film
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- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 title claims description 97
- 229910052707 ruthenium Inorganic materials 0.000 title claims description 97
- 238000000034 method Methods 0.000 title claims description 90
- 239000000758 substrate Substances 0.000 title claims description 26
- 239000000460 chlorine Substances 0.000 claims description 105
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 98
- 229910052801 chlorine Inorganic materials 0.000 claims description 98
- 230000007246 mechanism Effects 0.000 claims description 49
- 239000002243 precursor Substances 0.000 claims description 20
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 101
- 235000012431 wafers Nutrition 0.000 description 87
- 239000010410 layer Substances 0.000 description 17
- 229910052751 metal Inorganic materials 0.000 description 13
- 239000002184 metal Substances 0.000 description 13
- 238000001179 sorption measurement Methods 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 9
- 230000007723 transport mechanism Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000003028 elevating effect Effects 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 7
- 238000010926 purge Methods 0.000 description 7
- 229910052581 Si3N4 Inorganic materials 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 230000003213 activating effect Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 6
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 6
- 229910052814 silicon oxide Inorganic materials 0.000 description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 6
- 229910052721 tungsten Inorganic materials 0.000 description 6
- 239000010937 tungsten Substances 0.000 description 6
- 229910001930 tungsten oxide Inorganic materials 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 230000005764 inhibitory process Effects 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 239000012159 carrier gas Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- BZORFPDSXLZWJF-UHFFFAOYSA-N N,N-dimethyl-1,4-phenylenediamine Chemical compound CN(C)C1=CC=C(N)C=C1 BZORFPDSXLZWJF-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000000969 carrier Substances 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
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- WYILUGVDWAFRSG-UHFFFAOYSA-N 2,4-dimethylpenta-1,3-diene;ruthenium(2+) Chemical compound [Ru+2].CC(C)=CC(C)=[CH-].CC(C)=CC(C)=[CH-] WYILUGVDWAFRSG-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- XOSBQSGUNCVAIL-UHFFFAOYSA-N CC(=C[Ru]C1(C=CC=C1)CC)C=C(C)C Chemical compound CC(=C[Ru]C1(C=CC=C1)CC)C=C(C)C XOSBQSGUNCVAIL-UHFFFAOYSA-N 0.000 description 1
- SDJHPPZKZZWAKF-UHFFFAOYSA-N DMBD Natural products CC(=C)C(C)=C SDJHPPZKZZWAKF-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 238000003917 TEM image Methods 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000004380 ashing Methods 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- VMDTXBZDEOAFQF-UHFFFAOYSA-N formaldehyde;ruthenium Chemical compound [Ru].O=C VMDTXBZDEOAFQF-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- -1 methylcyclopentadienyl Chemical group 0.000 description 1
- FZHCFNGSGGGXEH-UHFFFAOYSA-N ruthenocene Chemical compound [Ru+2].C=1C=C[CH-]C=1.C=1C=C[CH-]C=1 FZHCFNGSGGGXEH-UHFFFAOYSA-N 0.000 description 1
- 238000007789 sealing Methods 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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- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- 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.
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- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
- H01L23/532—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body characterised by the materials
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Description
一実施形態のルテニウム(Ru)膜の形成方法の一例について説明する。図1は、一実施形態のルテニウム膜の形成方法の一例を示す工程断面図である。
一実施形態のルテニウム膜の形成方法を実現する基板処理システムの一例について説明する。図3は、基板処理システムの構成例を示す概略図である。
一実施形態のルテニウム膜の形成方法における塩素を吸着させる工程の処理に用いる処理室を実現する処理装置400の構成例について説明する。図4は、塩素を吸着させる工程の処理を実行する処理装置400の一例を示す概略図である。
処理容器410の圧力:1~100mTorr(0.13~13Pa)
ウエハ温度:60~300℃
第2高周波電源446の電力:50~500W
次に、塩素によるRu含有前駆体の吸着阻害作用を確認するために行った実施例について説明する。
塩素含有ガス:Cl2ガス(240sccm)
処理圧力:30mTorr(4Pa)
ウエハ温度:60℃
(ルテニウム膜604を成膜する工程)
処理圧力:20mTorr(2.7Pa)
ウエハ温度:155℃
101,201 金属層
102,202 絶縁膜
103,203 凹部
103a,203a 上面
103b,203b 側面
103c,203c 底面
104,204 塩素
105,205 ルテニウム膜
Claims (8)
- 絶縁膜を含む凹部を有する基板に塩素含有ガスを供給して前記凹部の上部に下部よりも高密度で塩素を吸着させる工程と、
前記塩素が吸着した前記凹部に塩素を含まないRu含有前駆体を供給して前記凹部にルテニウム膜を成膜する工程と、
を有する、
ルテニウム膜の形成方法。 - 前記塩素を吸着させる工程では、前記塩素含有ガスをプラズマにより活性化して供給する、
請求項1に記載のルテニウム膜の形成方法。 - 前記塩素を吸着させる工程と前記ルテニウム膜を成膜する工程とは、交互に繰り返し行われる、
請求項1又は2に記載のルテニウム膜の形成方法。 - 前記塩素を吸着させる工程の前に行われ、前記凹部に塩素含有ガスを供給して前記凹部の底面に形成された酸化膜を除去する工程を有する、
請求項1乃至3のいずれか一項に記載のルテニウム膜の形成方法。 - 前記塩素を吸着させる工程と前記ルテニウム膜を成膜する工程とは、真空搬送室を介して接続された別の処理容器内で行われる、
請求項1乃至4のいずれか一項に記載のルテニウム膜の形成方法。 - 前記塩素を吸着させる工程と前記ルテニウム膜を成膜する工程とは、同一の処理容器内で行われる、
請求項1乃至4のいずれか一項に記載のルテニウム膜の形成方法。 - 前記塩素含有ガスは、Cl2ガスであり、
前記Ru含有前駆体は、Ru3(CO)12である、
請求項1乃至6のいずれか一項に記載のルテニウム膜の形成方法。 - 減圧状態で基板を搬送可能な搬送機構を内部に有する真空搬送室と、
前記真空搬送室に接続された第1の処理装置と、
前記真空搬送室に接続された第2の処理装置と、
制御部と、
を備え、
前記制御部は、
絶縁膜を含む凹部を有する基板を前記第1の処理装置に搬送し、前記第1の処理装置において減圧状態で前記基板に塩素含有ガスを供給して前記凹部の上部に下部よりも高密度で塩素を吸着させる工程と、
前記基板を前記第1の処理装置から前記真空搬送室を介して前記第2の処理装置に搬送し、前記第2の処理装置において減圧状態で前記塩素が吸着した前記凹部に塩素を含まないRu含有前駆体を供給して前記凹部にルテニウム膜を成膜する工程と、
をこの順で実行するように、前記真空搬送室、前記第1の処理装置及び前記第2の処理装置を制御する、
基板処理システム。
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