JP6808481B2 - 半導体装置、システム、および、半導体装置の製造方法 - Google Patents
半導体装置、システム、および、半導体装置の製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 187
- 238000000034 method Methods 0.000 title claims description 70
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 235
- 239000002184 metal Substances 0.000 claims description 230
- 239000004020 conductor Substances 0.000 claims description 197
- 239000012212 insulator Substances 0.000 claims description 101
- 229910021332 silicide Inorganic materials 0.000 claims description 76
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical group [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 75
- 230000002093 peripheral effect Effects 0.000 claims description 55
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 47
- 229910052710 silicon Inorganic materials 0.000 claims description 47
- 239000010703 silicon Substances 0.000 claims description 47
- 239000012535 impurity Substances 0.000 claims description 31
- 239000010936 titanium Substances 0.000 claims description 28
- 150000002736 metal compounds Chemical class 0.000 claims description 25
- 230000004888 barrier function Effects 0.000 claims description 23
- 238000005229 chemical vapour deposition Methods 0.000 claims description 21
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 19
- 229910052719 titanium Inorganic materials 0.000 claims description 19
- 238000005240 physical vapour deposition Methods 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 17
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical group [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 9
- 229910052721 tungsten Inorganic materials 0.000 claims description 9
- 239000010937 tungsten Substances 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 6
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- 239000010941 cobalt Substances 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical group [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims 2
- 238000009413 insulation Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 170
- 239000010408 film Substances 0.000 description 127
- 238000001514 detection method Methods 0.000 description 12
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 11
- 239000013256 coordination polymer Substances 0.000 description 11
- 230000006870 function Effects 0.000 description 11
- 238000000926 separation method Methods 0.000 description 10
- 238000009792 diffusion process Methods 0.000 description 9
- 238000005530 etching Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 238000003384 imaging method Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- 230000003321 amplification Effects 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
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- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000007769 metal material Substances 0.000 description 5
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 5
- 239000003870 refractory metal Substances 0.000 description 5
- 239000002356 single layer Substances 0.000 description 5
- 125000006850 spacer group Chemical group 0.000 description 5
- 238000002230 thermal chemical vapour deposition Methods 0.000 description 5
- 238000001947 vapour-phase growth Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005669 field effect Effects 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 3
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 3
- 150000004767 nitrides Chemical class 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 229910052715 tantalum Inorganic materials 0.000 description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 238000005121 nitriding Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 description 1
- 241000252073 Anguilliformes Species 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 1
- 229910019001 CoSi Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- YTAHJIFKAKIKAV-XNMGPUDCSA-N [(1R)-3-morpholin-4-yl-1-phenylpropyl] N-[(3S)-2-oxo-5-phenyl-1,3-dihydro-1,4-benzodiazepin-3-yl]carbamate Chemical compound O=C1[C@H](N=C(C2=C(N1)C=CC=C2)C1=CC=CC=C1)NC(O[C@H](CCN1CCOCC1)C1=CC=CC=C1)=O YTAHJIFKAKIKAV-XNMGPUDCSA-N 0.000 description 1
- UGACIEPFGXRWCH-UHFFFAOYSA-N [Si].[Ti] Chemical compound [Si].[Ti] UGACIEPFGXRWCH-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005430 electron energy loss spectroscopy Methods 0.000 description 1
- RFHAOTPXVQNOHP-UHFFFAOYSA-N fluconazole Chemical compound C1=NC=NN1CC(C=1C(=CC(F)=CC=1)F)(O)CN1C=NC=N1 RFHAOTPXVQNOHP-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass 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
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- -1 oxides Chemical class 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910021341 titanium silicide Inorganic materials 0.000 description 1
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- H01L27/144—Devices controlled by radiation
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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
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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
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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
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- H01L23/482—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of lead-in layers inseparably applied to the semiconductor body
- H01L23/485—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of lead-in layers inseparably applied to the semiconductor body consisting of layered constructions comprising conductive layers and insulating layers, e.g. planar contacts
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- H01L27/144—Devices controlled by radiation
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
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Description
図1(a)を用いて、半導体装置APの構成を説明する。本実施形態における半導体装置APは光電変換装置であり、撮像装置である。典型的な半導体装置APはCMOSイメージセンサーである。半導体装置APは半導体チップIC内に複数の画素ユニットUNTを備える。複数の画素ユニットUNTの各々は、シリコン層の中に配された光電変換素子を含む画素回路を有する。画素ユニットUNTの各々は、マイクロレンズやカラーフィルタ、層内レンズ、光導波路等の光学素子を含むことができる。画素ユニットUNTは半導体装置APの受光エリアPXRと遮光エリアOBRに配されている。受光エリアPXRと遮光エリアOBRを併せて画素エリアと称することができる。画素ユニットUNTを光電変換ユニット、画素回路を光電変換回路と称することができる。
<半導体装置の製造方法>
半導体装置の製造方法を図3、4を参照して説明する。図3、4では半導体装置の製造方法の工程x(x=a〜i)を順に示しており、図3、4の工程xを図面の枝番(x−1)で示しており、要部の拡大図を図面の枝番(x−2)で示している。
103、105 半導体領域
230、250 孔
300 絶縁体膜
223、243 金属部
222、242 導電体部
211、201 シリサイド領域
Claims (20)
- 第1半導体領域および第2半導体領域を有するシリコン層と、
前記シリコン層の上に配され、前記第1半導体領域の上に位置する第1孔および前記第2半導体領域の上に位置する第2孔を有する絶縁体膜と、
前記第1孔の中に配された第1金属元素を含む第1金属部と、
前記第1金属部と前記第1半導体領域との間に配され、前記第1金属元素とは別の第2金属元素を含有する第1導電体部と、
前記第1導電体部と前記第1半導体領域との間に配され、前記第2金属元素を含有する第1シリサイド領域と、
前記第2孔の中に配された前記第1金属元素を含む第2金属部と、
前記第2金属部と前記第2半導体領域との間に配され、前記第2金属元素を含有する第2導電体部と、
前記第2導電体部と前記第2半導体領域との間に配され、前記第1金属元素および前記第2金属元素とは別の第3金属元素を含有する第2シリサイド領域と、を備え、
前記第1導電体部の厚さは、前記第1シリサイド領域の厚さ、および、前記第2導電体部の厚さよりも大きいことを特徴とする半導体装置。 - 前記第1導電体部の抵抗率は前記第1金属部の抵抗率よりも大きく、前記第2導電体部の抵抗率は前記第2金属部の抵抗率よりも大きい、請求項1に記載の半導体装置。
- 前記第1金属部と前記絶縁体膜との間には、前記第1金属部に含まれる金属元素とは別の金属元素を含有する第3導電体部が配されており、
前記第2金属部と前記絶縁体膜との間には、前記第2金属部に含まれる金属元素とは別の金属元素を含有する第4導電体部が配されており、
前記第3導電体部の厚さに対する前記第1導電体部の厚さの比が、前記第4導電体部の厚さに対する前記第2導電体部の厚さの比よりも大きい、請求項1または2に記載の半導体装置。 - 前記第1金属部と前記絶縁体膜との間には、前記第1金属部に含まれる金属元素とは別の金属元素を含有する第3導電体部が配されており、
前記第2金属部と前記絶縁体膜との間には、前記第2金属部に含まれる金属元素とは別の金属元素を含有する第4導電体部が配されており、
前記第3導電体部の厚さは前記第4導電体部の厚さよりも小さい、請求項1乃至3のいずれか1項に記載の半導体装置。 - 前記第1導電体部は、前記第2金属元素を含有する第1金属層と、前記第1金属層と前記第1金属部との間に配された第1金属化合物層と、を有し、
前記第1金属層の厚さが、前記第1金属化合物層の厚さ、および、前記第2導電体部の前記厚さの少なくとも一方よりも大きい、請求項1乃至4のいずれか1項に記載の半導体装置。 - 前記第1金属元素はタングステンであり、前記第2金属元素はチタンであり、前記第3金属元素はコバルトまたはニッケルである、請求項1乃至5のいずれか1項に記載の半導体装置。
- 第1半導体領域および第2半導体領域を有するシリコン層と、
前記シリコン層の上に配され、前記第1半導体領域の上に位置する第1孔および前記第2半導体領域の上に位置する第2孔を有する絶縁体膜と、
前記第1孔の中に配された第1コンタクトプラグと、
前記第2孔の中に配された第2コンタクトプラグと、
前記第1コンタクトプラグと前記第1半導体領域との間に配された第1シリサイド領域と、
前記第2コンタクトプラグと前記第2半導体領域との間、および、前記絶縁体膜と前記第2半導体領域との間に配された第2シリサイド領域と、を備える半導体装置であって、
前記第1コンタクトプラグは、第1金属部と第1バリアメタル部とを有し、
前記第2コンタクトプラグは、第2金属部と第2バリアメタル部とを有し、
前記第1バリアメタル部うちで前記第1金属部と前記第1シリサイド領域との間に位置する第1部分の厚さは、前記第1シリサイド領域の厚さ、および、前記第2バリアメタル部のうちで前記第2金属部と前記第2シリサイド領域との間に位置する第2部分の厚さよりも大きいことを特徴とする半導体装置。 - 前記第1バリアメタル部のうちで前記第1金属部と前記絶縁体膜との間に位置する第3部分の厚さは、前記第2バリアメタル部のうちで前記第2金属部と前記絶縁体膜との間に位置する第4部分の厚さよりも小さい、請求項7に記載の半導体装置。
- 前記第1バリアメタル部のうちで前記第1金属部と前記絶縁体膜との間に位置する第3部分の厚さに対する前記第1部分の厚さの比が、前記第2バリアメタル部のうちで前記第2金属部と前記絶縁体膜との間に位置する第4部分の厚さに対する前記第2部分の比よりも大きい、請求項7または8に記載の半導体装置。
- 前記第1孔の幅が前記第2孔の幅と異なる、請求項1乃至9のいずれか1項に記載の半導体装置。
- 前記第1半導体領域および前記第2半導体領域のそれぞれは、トランジスタのドレインを構成する、請求項1乃至10のいずれか1項に記載の半導体装置。
- 前記第1半導体領域は、前記絶縁体膜の下に位置する不純物領域と、前記第1孔の下に位置し不純物濃度が前記不純物領域の不純物濃度よりも高い部分と、を含む、請求項1乃至11いずれか1項に記載の半導体装置。
- 前記第1半導体領域は画素回路を構成し、前記第2半導体領域は周辺回路を構成する、請求項1乃至12のいずれか1項に記載の半導体装置。
- 前記第1半導体領域には光電変換部で生成された電荷が転送される、請求項1乃至13のいずれか1項に記載の半導体装置。
- 請求項1乃至14のいずれか1項に記載の半導体装置と、
前記半導体装置に結像する光学系、前記半導体装置を制御する制御装置、前記半導体装置から出力された信号を処理する処理装置、前記半導体装置で得られた情報を表示する表示装置、および、前記半導体装置で得られた情報を記憶する記憶装置の少なくともいずれかと、を備えることを特徴とするシステム。 - 第1半導体領域および第2半導体領域を有するシリコン層と、前記第1半導体領域および前記第2半導体領域を覆う絶縁体膜と、前記第2半導体領域と前記絶縁体膜との間に配されたシリサイド領域と、を有する部材を用意する工程と、
前記第1半導体領域の上において前記絶縁体膜に設けられた第1孔の中に、物理気相成長法および化学気相成長法の一方により第1導電体膜を形成する工程と、
前記第1孔の中に、物理気相成長法および化学気相成長法の他方により第2導電体膜を形成する工程と、
前記第1導電体膜および前記第2導電体膜が形成された前記第1孔の中に、金属膜を形成する工程と、
前記シリサイド領域の上において前記絶縁体膜に設けられた第2孔の中に、前記シリサイド領域に接する第3導電体膜を化学気相成長法により形成する工程と、を有することを特徴とする半導体装置の製造方法。 - 前記第1導電体膜は、前記第1半導体領域に接する金属層と前記金属層の上の金属化合物層とを含む、請求項16に記載の半導体装置の製造方法。
- 前記第1孔の中に形成された前記第1導電体膜と前記シリコン層を反応させてシリサイド領域を形成する、請求項16または17に記載の半導体装置の製造方法。
- 前記第2導電体膜を形成する工程の後に、前記絶縁体膜に前記第2孔を形成する工程を有する、請求項16乃至18のいずれか1項に記載の半導体装置の製造方法。
- 物理気相成長法により前記第1導電体膜を形成した後に、化学気相成長法により前記第2導電体膜を形成する、請求項16乃至19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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