JP2009231739A - 銅配線、半導体装置および銅配線の形成方法 - Google Patents
銅配線、半導体装置および銅配線の形成方法 Download PDFInfo
- Publication number
- JP2009231739A JP2009231739A JP2008078260A JP2008078260A JP2009231739A JP 2009231739 A JP2009231739 A JP 2009231739A JP 2008078260 A JP2008078260 A JP 2008078260A JP 2008078260 A JP2008078260 A JP 2008078260A JP 2009231739 A JP2009231739 A JP 2009231739A
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- Prior art keywords
- barrier layer
- concentration
- copper
- insulating layer
- carbon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 239000010949 copper Substances 0.000 title claims abstract description 189
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 164
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 162
- 238000000034 method Methods 0.000 title claims description 43
- 239000004065 semiconductor Substances 0.000 title claims description 24
- 230000004888 barrier function Effects 0.000 claims abstract description 302
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 97
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 85
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 84
- 238000009792 diffusion process Methods 0.000 claims abstract description 74
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 72
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 69
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 67
- 239000001301 oxygen Substances 0.000 claims abstract description 67
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 67
- 239000001257 hydrogen Substances 0.000 claims abstract description 60
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 57
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000010703 silicon Substances 0.000 claims abstract description 47
- 239000000758 substrate Substances 0.000 claims abstract description 12
- 125000001183 hydrocarbyl group Chemical class 0.000 claims abstract 16
- 150000002430 hydrocarbons Chemical class 0.000 claims description 114
- 239000000654 additive Substances 0.000 claims description 105
- 230000000996 additive effect Effects 0.000 claims description 105
- 125000004432 carbon atom Chemical group C* 0.000 claims description 65
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- 239000011572 manganese Substances 0.000 claims description 56
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- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical group [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 30
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 30
- 229910052748 manganese Inorganic materials 0.000 claims description 29
- 239000012298 atmosphere Substances 0.000 claims description 28
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 23
- 125000004429 atom Chemical group 0.000 claims description 20
- 230000015572 biosynthetic process Effects 0.000 claims description 17
- 238000000151 deposition Methods 0.000 claims description 15
- 150000002431 hydrogen Chemical class 0.000 claims description 15
- 150000001721 carbon Chemical group 0.000 claims description 14
- 239000011261 inert gas Substances 0.000 claims description 11
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- 229930195733 hydrocarbon Natural products 0.000 claims description 7
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 4
- 239000004215 Carbon black (E152) Substances 0.000 claims description 3
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 5
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
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- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
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- 238000011049 filling Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 125000005843 halogen group Chemical group 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- 150000004678 hydrides Chemical class 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- 238000007733 ion plating Methods 0.000 description 2
- 150000002605 large molecules Chemical class 0.000 description 2
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- 239000011777 magnesium Substances 0.000 description 2
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052754 neon Inorganic materials 0.000 description 2
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- 230000008054 signal transmission Effects 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
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- 238000003860 storage Methods 0.000 description 2
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 2
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- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
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- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- 125000003158 alcohol group Chemical group 0.000 description 1
- 150000001334 alicyclic compounds Chemical class 0.000 description 1
- 125000002723 alicyclic group Chemical group 0.000 description 1
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- 125000003545 alkoxy group Chemical group 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
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- 238000004458 analytical method Methods 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 150000008365 aromatic ketones Chemical class 0.000 description 1
- 229910021398 atomic carbon Inorganic materials 0.000 description 1
- IVHJCRXBQPGLOV-UHFFFAOYSA-N azanylidynetungsten Chemical compound [W]#N IVHJCRXBQPGLOV-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
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- SLLGVCUQYRMELA-UHFFFAOYSA-N chlorosilicon Chemical compound Cl[Si] SLLGVCUQYRMELA-UHFFFAOYSA-N 0.000 description 1
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- 125000002524 organometallic group Chemical group 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
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- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 1
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- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
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- 239000005052 trichlorosilane Substances 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
- 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
- H01L23/5329—Insulating materials
-
- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- 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
- H01L21/76801—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
- H01L21/76829—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 characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers
- H01L21/76831—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 characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers in via holes or trenches, e.g. non-conductive sidewall liners
-
- 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
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- 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
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Abstract
【解決手段】この発明の銅配線は、シリコン基板の表面上に設けられ、珪素と酸素と炭素とを炭化水素基の形態で含むSiOC絶縁層10と、SiOC絶縁層10上に形成され、添加元素の酸化物を含む銅合金からなるバリア層15と、そのバリア層15に接して形成され、銅を主成分としてなる配線本体16とを備え、バリア層15は、添加元素と炭素と水素とを含む酸化物からなり、その添加元素の原子濃度が最大となる当該バリア層内の厚さ方向の位置で、炭素と水素の各原子濃度が極大となる。
【選択図】図2
Description
11 配線用トレンチ溝
11a 側壁
12 Cu・Mn合金被膜
13 銅埋め込み層
14 界面
15 バリア層
16 配線本体
Claims (29)
- 絶縁層に配線本体を備えてなる銅配線において、
シリコン基板の表面上に設けられ、珪素(元素記号:Si)と酸素(元素記号:O)と炭素(元素記号:C)とを炭化水素基の形態で含むSiOC絶縁層と、
上記SiOC絶縁層上に形成され、添加元素の酸化物を含む銅(元素記号:Cu)合金からなるバリア層と、
上記バリア層に接して形成され、銅を主成分としてなる配線本体と、を備え、
上記バリア層は、添加元素と炭素と水素とを含む酸化物からなり、その添加元素の原子濃度が最大となる当該バリア層内の厚さ方向の位置で、炭素と水素の各原子濃度が極大となる、
ことを特徴とする銅配線。 - 上記バリア層の添加元素は、マンガン(元素記号:Mn)である、請求項1に記載の銅配線。
- 上記バリア層の炭素と水素は、SiOC絶縁層から当該バリア層の内部に拡散した炭化水素基に由来している、請求項1または2に記載の銅配線。
- 上記SiOC絶縁層の炭化水素基は、炭素原子数を1または2とする、請求項1乃至3の何れか1項に記載の銅配線。
- 上記SiOC絶縁層の炭化水素基は、メチル基(−CH3)を含む、請求項4に記載の銅配線。
- 上記バリア層は、上記添加元素の原子濃度が最大となる当該バリア層内の厚さ方向の位置で、炭素原子の濃度が極大となり、その炭素原子の極大濃度は、上記添加元素の最大の原子濃度以下である、請求項1乃至5の何れか1項に記載の銅配線。
- 上記バリア層は、上記添加元素の原子濃度が最大となる当該バリア層内の厚さ方向の位置で、水素原子の濃度が極大となり、その水素原子の極大濃度は、上記添加元素の最大の原子濃度以下である、請求項1乃至6の何れか1項に記載の銅配線。
- 上記バリア層での水素原子の極大濃度は、炭素原子の極大濃度以下である、請求項7に記載の銅配線。
- 上記バリア層の内部で、炭素原子が正規分布曲線状の濃度分布を呈している、請求項1乃至8の何れか1項に記載の銅配線。
- 上記バリア層の内部で、水素原子が正規分布曲線状の濃度分布を呈している、請求項1乃至9の何れか1項に記載の銅配線。
- 絶縁層に銅配線を回路配線として備えた半導体装置において、
シリコン基板の表面上に設けられ、珪素と酸素と炭素とを炭化水素基の形態で含むSiOC絶縁層と、
上記SiOC絶縁層上に形成され、添加元素の酸化物を含む銅合金からなるバリア層と、
上記バリア層に接して形成され、銅を主成分としてなる配線本体と、
を備えて成る銅配線を回路配線として備え、
上記バリア層は、添加元素と炭素と水素とを含む酸化物からなり、その添加元素の原子濃度が最大となる当該バリア層内の厚さ方向の位置で、炭素と水素の各原子濃度が極大となる、
ことを特徴とする半導体装置。 - 上記バリア層の添加元素は、マンガンである、請求項11に記載の半導体装置。
- 上記バリア層の炭素と水素は、SiOC絶縁層から当該バリア層の内部に拡散した炭化水素基に由来している、請求項11または12に記載の半導体装置。
- 上記SiOC絶縁層の炭化水素基は、炭素原子数を1または2とする、請求項11乃至13の何れか1項に記載の半導体装置。
- 上記SiOC絶縁層の炭化水素基は、メチル基(−CH3)を含む、請求項14に記載の半導体装置。
- 上記バリア層は、上記添加元素の原子濃度が最大となる当該バリア層内の厚さ方向の位置で、炭素原子の濃度が極大となり、その炭素原子の極大濃度は、上記添加元素の最大の原子濃度以下である、請求項11乃至15の何れか1項に記載の半導体装置。
- 上記バリア層は、上記添加元素の原子濃度が最大となる当該バリア層内の厚さ方向の位置で、水素原子の濃度が極大となり、その水素原子の極大濃度は、上記添加元素の最大の原子濃度以下である、請求項11乃至16の何れか1項に記載の半導体装置。
- 上記バリア層での水素原子の極大濃度は、炭素原子の極大濃度以下である、請求項17に記載の半導体装置。
- 上記バリア層の内部で、炭素原子が正規分布曲線状の濃度分布を呈している、請求項11乃至18の何れか1項に記載の半導体装置。
- 上記バリア層の内部で、水素原子が正規分布曲線状の濃度分布を呈している、請求項11乃至19の何れか1項に記載の半導体装置。
- 絶縁層に配線本体を備えてなる銅配線を形成する銅配線の形成方法において、
シリコン基板上に、炭化水素基を含むSiOC絶縁層を形成する第1の工程と、
上記第1の工程の後に、酸素の体積濃度aの不活性ガス雰囲気内で、SiOC絶縁膜上に、添加元素を含む銅合金からなる銅合金被膜を形成する第2の工程と、
上記第2の工程の後に、上記銅合金被膜上に銅を堆積させ銅堆積層を形成する第3の工程と、
上記第3の工程の後に、体積濃度aを超える体積濃度bの酸素を含む不活性ガス雰囲気内で、300℃以上450℃以下の拡散温度で加熱し、SiOC絶縁層の表面近傍にある炭化水素基を銅合金被膜側に拡散させて、SiOC絶縁層と銅合金被膜との間にバリア層を形成するとともに、その銅合金被膜を銅堆積層の銅と一体化させて配線本体とする第4の工程と、を有し、
上記バリア層は、添加元素と炭素と水素とを含む酸化物からなり、その添加元素の原子濃度が最大となる当該バリア層内の厚さ方向の位置で、炭素と水素の各原子濃度が極大となっている、
ことを特徴とする銅配線の形成方法。 - 上記第1の工程でのSiOC絶縁層形成は、珪素原子を含む原料と、酸素原子を含む原料と、炭化水素基を含む原料の各々を用いて行われる、請求項21に記載の銅配線の形成方法。
- 上記第1の工程でのSiOC絶縁層形成は、珪素原子と併せて酸素原子を含む原料と、炭化水素基を含む原料とを用いて行われる、請求項21に記載の銅配線の形成方法。
- 上記第1の工程でのSiOC絶縁層形成は、珪素原子と併せて炭化水素基を含む原料と、酸素を含む原料とを用いて行われる、請求項21に記載の銅配線の形成方法。
- 上記第1の工程でのSiOC絶縁層形成は、珪素原子を含む原料と、酸素原子と併せて炭化水素基を含む原料とを用いて行われる、請求項21に記載の銅配線の形成方法。
- 上記第1の工程での炭化水素基は、炭素原子数を1または2とする、請求項21乃至25の何れか1項に記載の銅配線の形成方法。
- 上記第1の工程での炭化水素基は、メチル基(−CH3)を含む、請求項26に記載の銅配線の形成方法。
- 上記第1の工程での銅合金に含まれる添加元素は、マンガンであり、上記第1の工程での銅合金被膜の形成は、第3の工程での拡散温度より低い温度で行われる、請求項21乃至27の何れか1項に記載の銅配線の形成方法。
- 上記体積濃度aは0.5vol.ppm未満であり、上記体積濃度bは0.5vol.Ppm以上1.5vol.Ppm以下である、請求項21乃至28の何れか1項に記載の銅配線の形成方法。
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WO2015098873A1 (ja) | 2013-12-24 | 2015-07-02 | 株式会社マテリアル・コンセプト | 太陽電池及びその製造方法 |
US10529875B2 (en) | 2013-12-24 | 2020-01-07 | Material Concept, Inc. | Solar cell and production method therefor |
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US20090243112A1 (en) | 2009-10-01 |
US7755192B2 (en) | 2010-07-13 |
JP4423379B2 (ja) | 2010-03-03 |
US8163649B2 (en) | 2012-04-24 |
US20100267228A1 (en) | 2010-10-21 |
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