JP2010283103A - 半導体装置及びその製造方法 - Google Patents
半導体装置及びその製造方法 Download PDFInfo
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- JP2010283103A JP2010283103A JP2009134742A JP2009134742A JP2010283103A JP 2010283103 A JP2010283103 A JP 2010283103A JP 2009134742 A JP2009134742 A JP 2009134742A JP 2009134742 A JP2009134742 A JP 2009134742A JP 2010283103 A JP2010283103 A JP 2010283103A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims description 41
- 238000004519 manufacturing process Methods 0.000 title claims description 38
- 239000010949 copper Substances 0.000 claims abstract description 121
- 239000010410 layer Substances 0.000 claims abstract description 121
- 230000004888 barrier function Effects 0.000 claims abstract description 120
- 239000011229 interlayer Substances 0.000 claims abstract description 102
- 229910052751 metal Inorganic materials 0.000 claims abstract description 93
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 55
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000001301 oxygen Substances 0.000 claims abstract description 28
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 28
- 229910052802 copper Inorganic materials 0.000 claims abstract description 27
- 150000001875 compounds Chemical class 0.000 claims abstract description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000758 substrate Substances 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims description 83
- 238000009792 diffusion process Methods 0.000 claims description 35
- 229910052715 tantalum Inorganic materials 0.000 claims description 24
- 239000000470 constituent Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000007795 chemical reaction product Substances 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 4
- 239000010955 niobium Substances 0.000 claims description 4
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 3
- 229910052702 rhenium Inorganic materials 0.000 claims description 3
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 claims description 3
- 229910052713 technetium Inorganic materials 0.000 claims description 3
- GKLVYJBZJHMRIY-UHFFFAOYSA-N technetium atom Chemical compound [Tc] GKLVYJBZJHMRIY-UHFFFAOYSA-N 0.000 claims description 3
- 229910052727 yttrium Inorganic materials 0.000 claims description 3
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 2
- 229910000765 intermetallic Inorganic materials 0.000 claims description 2
- 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 2
- 239000002356 single layer Substances 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 claims description 2
- 239000003039 volatile agent Substances 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 description 55
- 239000000956 alloy Substances 0.000 description 55
- 239000011572 manganese Substances 0.000 description 36
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 28
- 230000004048 modification Effects 0.000 description 20
- 238000012986 modification Methods 0.000 description 20
- 229910052748 manganese Inorganic materials 0.000 description 17
- 230000002265 prevention Effects 0.000 description 17
- 230000015572 biosynthetic process Effects 0.000 description 15
- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 description 14
- 229910003468 tantalcarbide Inorganic materials 0.000 description 14
- 230000008569 process Effects 0.000 description 9
- 238000005229 chemical vapour deposition Methods 0.000 description 6
- 238000009713 electroplating Methods 0.000 description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910010271 silicon carbide Inorganic materials 0.000 description 5
- 229910052581 Si3N4 Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 4
- 238000007772 electroless plating Methods 0.000 description 3
- 238000005240 physical vapour deposition Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 for example Chemical compound 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
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- 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
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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
- H01L21/70—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
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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
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76843—Barrier, adhesion or liner layers formed in openings in a dielectric
- H01L21/76846—Layer combinations
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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
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Abstract
【解決手段】半導体基板の上に酸素及び炭素を含む層間絶縁膜11を形成し、該層間絶縁膜11に溝部13を形成し、溝部13の底面上及び側壁上に所定の第1の金属元素及び第2の金属元素を含む補助膜14を形成し、熱処理を行い、銅を主成分とする配線本体層19を、溝部13の内部を埋め込むように形成する。熱処理を行うことにより、補助膜14中の第1の金属元素を補助膜14と対向する層間絶縁膜11に拡散させ、溝部13の底面及び側壁における層間絶縁膜11の上において、第1の金属元素と層間絶縁膜11の酸素元素との化合物を主成分とする第1のバリア膜15を形成させた後、補助膜14中の第2の金属元素が補助膜14と対向する層間絶縁膜11に拡散させ、第2の金属元素と層間絶縁膜11の炭素元素との化合物を主成分とする第2のバリア膜17を形成する。
【選択図】図1
Description
第2の金属元素は、タンタル又はチタンの少なくとも1つの元素であることが好ましい。
本発明の第1の実施形態に係る半導体装置の製造方法について、図1(a)〜(d)を参照しながら説明する。
本発明の第1の実施形態の一変形例に係る半導体装置の製造方法について、図2(a)〜(c)を参照しながら説明する。層間絶縁膜11〜合金補助膜14の製造方法は、第1の実施形態における図1(a)と同一であるため、説明を省略する。
本発明の第2の実施形態に係る半導体装置の製造方法について、図3(a)〜(c)を参照しながら説明する。層間絶縁膜11〜合金補助膜14の製造方法は、第1の実施形態における図1(a)と同一であるため、説明を省略する。
本発明の第3の実施形態に係る半導体装置について、図4を参照しながら説明する。
本発明の第3の実施形態の一変形例に係る半導体装置の製造方法について、図7を参照しながら説明する。
12 炭素高濃度領域
13 配線溝
14 合金補助膜
15 第1のバリア膜
16 合金膜
17 第2のバリア膜
18 銅(Cu)膜
19 銅(Cu)層(配線本体層)
20 上側絶縁膜
21 下部層間絶縁膜
22 下部バリア膜
23 下部銅(Cu)層(導電層、下部配線本体層)
24 下部拡散防止膜(上側絶縁膜)
25 上部層間絶縁膜
26 炭素高濃度領域
27a 配線接続孔
27b 配線溝
28 合金補助膜
29 第1の上部バリア膜
30 合金膜
31 第2の上部バリア膜
32 銅(Cu)膜
33 上部銅(Cu)層(上部配線本体層)
34 上部拡散防止膜(上側絶縁膜)
35 中部層間絶縁膜
36 炭素高濃度領域
37 配線接続孔
38 第1の中部バリア膜
39 第2の中部バリア膜
40 中部銅(Cu)層(接続プラグ)
41 上部層間絶縁膜
42 炭素高濃度領域
43 上部配線溝
44 第1の上部バリア膜
45 第2の上部バリア膜
46 上部銅(Cu)層(上部配線本体層)
47 上部拡散防止膜(上側絶縁膜)
Claims (14)
- 半導体基板の上に形成され、溝部を有する層間絶縁膜と、
前記溝部の底面上及び側壁上に形成されたバリア膜と、
前記バリア膜の上に前記溝部を埋め込むように形成され、銅を主成分とする配線本体層とを備え、
前記バリア膜は、少なくとも2種類の金属元素と前記層間絶縁膜の構成元素との化合物を主成分とすることを特徴とする半導体装置。 - 前記配線本体層の下側に形成され、前記配線本体層の一部と接続される接続部を有する導電層をさらに備え、
前記バリア膜は、前記導電層と前記配線本体層との接続部には介在しないことを特徴とする請求項1に記載の半導体装置。 - 前記バリア膜は、前記配線本体層の上面にも形成されていることを特徴とする請求項1又は2に記載の半導体装置。
- 少なくとも2種類の前記金属元素は、シリコン、酸素及び炭素と化合物を作りやすい第1の金属元素と、シリコン、酸素及び炭素と化合物を作りやすく且つ銅の中における拡散が前記第1の金属元素よりも遅い第2の金属元素を含むことを特徴とする請求項1〜3のうちのいずれか1項に記載の半導体装置。
- 前記第1の金属元素の酸化物及び前記第2の金属元素の炭化物は、銅に対する拡散バリア性を有することを特徴とする請求項4に記載の半導体装置。
- 前記第2の金属元素は、前記第1の金属元素との間に金属間化合物を作らない元素であることを特徴とする請求項4又は5に記載の半導体装置。
- 前記第1の金属元素は、マンガン、ニオブ、ジルコニウム、クロム、バナジウム、イットリウム、テクネチウム及びレニウムからなる群から選択された少なくとも1つの元素であり、
前記第2の金属元素は、タンタル又はチタンの少なくとも1つの元素であることを特徴とする請求項4〜6のうちのいずれか1項に記載の半導体装置。 - 前記層間絶縁膜は、シリコン及び酸素を主成分とし、炭素を原子%にして20%以上含む低誘電率膜であり、局所的に炭素の濃度が高い部分を有する膜であることを特徴とする請求項1〜7のうちのいずれか1項に記載の半導体装置。
- 前記層間絶縁膜は、シリコン及び酸素を主成分とする空孔を有する低誘電率膜であり、且つ前記空孔を形成するために炭素を主成分とする揮発性の化合物を含むことを特徴とする請求項1〜8のうちのいずれか1項に記載の半導体装置。
- 半導体基板の上に酸素及び炭素を含む層間絶縁膜を形成し、該層間絶縁膜に溝部を形成する工程(a)と、
前記溝部の底面上及び側壁上に所定の第1の金属元素及び第2の金属元素を含む補助膜を形成する工程(b)と、
前記工程(b)よりも後に、銅を主成分とする配線本体層を、前記溝部を埋め込むように形成する工程(c)と、
前記工程(b)よりも後に、前記補助膜に対して熱処理を行う工程(d)とを備え、
前記工程(d)において、前記補助膜中の前記第1の金属元素を前記補助膜と対向する前記層間絶縁膜に拡散させ、前記溝の底面及び側壁における前記層間絶縁膜の上において、前記第1の金属元素と前記層間絶縁膜の酸素元素との化合物を主成分とする第1のバリア膜を形成した後、前記補助膜中の前記第2の金属元素が前記補助膜と対向する前記層間絶縁膜に拡散させ、前記第2の金属元素と前記層間絶縁膜の炭素元素との化合物を主成分とする第2のバリア膜を形成することを特徴とする半導体装置の製造方法。 - 前記工程(c)の後に、前記配線本体層の上に上側絶縁膜を形成する工程(e)をさらに備え、
前記工程(e)の後に前記工程(d)を行って、前記補助膜中の前記第1の金属元素及び第2の金属元素を前記配線本体層の上部にも拡散させて、前記第1の金属元素及び第2の金属元素と前記上側絶縁膜の構成元素との化合物を主成分とする反応生成物からなる膜を前記配線本体層の上部に形成することを特徴とする請求項10に記載の半導体装置の製造方法。 - 前記工程(c)の後に、酸素を含む雰囲気内において前記工程(d)を行って、前記補助膜中の前記第1の金属元素及び第2の金属元素を前記配線本体層の上部にも拡散させ、前記第1の金属元素の酸化物及び第2の金属元素の酸化物を主成分とする反応生成物からなる膜を前記配線本体層の上部に形成することを特徴とする請求項10に記載の半導体装置の製造方法。
- 前記第1の金属元素及び第2の金属元素は、前記補助膜にのみ含まれていることを特徴とする請求項10〜12のうちのいずれか1項に記載の半導体装置の製造方法。
- 前記補助膜は、前記第1の金属元素及び第2の金属元素を含む単層膜、又は前記第1の金属元素を含み且つ前記第2の金属元素を含まない膜と前記第1の金属元素を含まないで且つ前記第2の金属元素を含む膜との積層膜により構成されていることを特徴とする請求項10〜13のうちのいずれか1項に記載の半導体装置の製造方法。
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