JP7282785B2 - 炭化タングステン膜の接着性及び欠陥を改善する技法 - Google Patents
炭化タングステン膜の接着性及び欠陥を改善する技法 Download PDFInfo
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- JP7282785B2 JP7282785B2 JP2020538727A JP2020538727A JP7282785B2 JP 7282785 B2 JP7282785 B2 JP 7282785B2 JP 2020538727 A JP2020538727 A JP 2020538727A JP 2020538727 A JP2020538727 A JP 2020538727A JP 7282785 B2 JP7282785 B2 JP 7282785B2
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- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 title claims description 146
- 238000000034 method Methods 0.000 title claims description 81
- 230000007547 defect Effects 0.000 title description 2
- 238000000151 deposition Methods 0.000 claims description 78
- 230000008021 deposition Effects 0.000 claims description 64
- 239000000758 substrate Substances 0.000 claims description 55
- 230000000977 initiatory effect Effects 0.000 claims description 48
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 31
- 229910052710 silicon Inorganic materials 0.000 claims description 31
- 239000010703 silicon Substances 0.000 claims description 31
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 claims description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 239000010937 tungsten Substances 0.000 claims description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- 239000010408 film Substances 0.000 description 92
- 238000012545 processing Methods 0.000 description 41
- 239000007789 gas Substances 0.000 description 32
- 239000000463 material Substances 0.000 description 21
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 18
- 150000004767 nitrides Chemical class 0.000 description 14
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 5
- 229920005591 polysilicon Polymers 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 229910021417 amorphous silicon Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- CJNBYAVZURUTKZ-UHFFFAOYSA-N hafnium(iv) oxide Chemical compound O=[Hf]=O CJNBYAVZURUTKZ-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 229910021419 crystalline silicon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 241000473391 Archosargus rhomboidalis Species 0.000 description 1
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 229910003855 HfAlO Inorganic materials 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- NOJHQZPGGBLCPR-UHFFFAOYSA-N [Bi].[Sr].[Ti] Chemical compound [Bi].[Sr].[Ti] NOJHQZPGGBLCPR-UHFFFAOYSA-N 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- ILCYGSITMBHYNK-UHFFFAOYSA-N [Si]=O.[Hf] Chemical compound [Si]=O.[Hf] ILCYGSITMBHYNK-UHFFFAOYSA-N 0.000 description 1
- OMVNFZVCYKQEIT-UHFFFAOYSA-N [Ti].[Zr].[Pt] Chemical compound [Ti].[Zr].[Pt] OMVNFZVCYKQEIT-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
- MIQVEZFSDIJTMW-UHFFFAOYSA-N aluminum hafnium(4+) oxygen(2-) Chemical compound [O-2].[Al+3].[Hf+4] MIQVEZFSDIJTMW-UHFFFAOYSA-N 0.000 description 1
- 238000005513 bias potential Methods 0.000 description 1
- 230000007175 bidirectional communication Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- -1 but not limited to Chemical class 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000788 chromium alloy Substances 0.000 description 1
- BIJOYKCOMBZXAE-UHFFFAOYSA-N chromium iron nickel Chemical compound [Cr].[Fe].[Ni] BIJOYKCOMBZXAE-UHFFFAOYSA-N 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000779 depleting effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- NQKXFODBPINZFK-UHFFFAOYSA-N dioxotantalum Chemical compound O=[Ta]=O NQKXFODBPINZFK-UHFFFAOYSA-N 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910001293 incoloy Inorganic materials 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000000427 thin-film deposition Methods 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
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- H01L21/02107—Forming insulating materials on a substrate
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- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02172—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides
- H01L21/02175—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing at least one metal element, e.g. metal oxides, metal nitrides, metal oxynitrides or metal carbides characterised by the metal
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- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
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- C23C16/50—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges
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- H01L21/02107—Forming insulating materials on a substrate
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- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/0226—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process
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- H01L21/02299—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer pre-treatment
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- H01L21/033—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers
- H01L21/0332—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their composition, e.g. multilayer masks, materials
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- H01L21/0334—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/0337—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane characterised by the process involved to create the mask, e.g. lift-off masks, sidewalls, or to modify the mask, e.g. pre-treatment, post-treatment
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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
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
- H01L21/28506—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
- H01L21/28512—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table
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Description
Claims (20)
- 炭化タングステン膜を形成する方法であって、
第1の堆積速度で基板のケイ素含有表面に炭化タングステン開始層を形成することと、
第2の堆積速度で前記炭化タングステン開始層に炭化タングステン膜を形成すること
を含み、
前記第2の堆積速度が、前記第1の堆積速度より大きい、方法。 - 前記第2の堆積速度対前記第1の堆積速度の比率が、3:1以上である、請求項1に記載の方法。
- 前記第2の堆積速度が、30Å/秒以上であり、前記第1の堆積速度が、10Å/秒以下である、請求項2に記載の方法。
- 前記第2の堆積速度が、30Å/秒から40Å/秒の範囲内にあり、前記第1の堆積速度が、5Å/秒から10Å/秒の範囲内にある、請求項3に記載の方法。
- 前記炭化タングステン開始層が、10Åから200Åの範囲内の厚さを有する、請求項1に記載の方法。
- 前記炭化タングステン膜が、5,000Å以上の厚さを有する、請求項5に記載の方法。
- 前記炭化タングステン開始層を形成することが、2Torrから10Torrの第1の範囲内の第1の圧力で100ワット以下の第1のRFプラズマ出力を含む第1のPECVD処理において、前記ケイ素含有表面を、WF6、C3H6、及び任意選択的にH2を含む第1の反応性ガスに曝露することを含む、請求項6に記載の方法。
- 前記第1の反応性ガス内のC 3 H 6 とWF 6 が、2:1以上の比率(C 3 H 6 :WF 6 )で存在する、請求項7に記載の方法。
- 前記炭化タングステン膜を形成することが、2Torrから10Torrの第2の範囲内の第2の圧力で500ワット以上の第2のRFプラズマ出力を含む第2のPECVD処理において、前記炭化タングステン開始層を、WF6、C3H6、及び任意選択的にH2を含む第2の反応性ガスに曝露することを含む、請求項7に記載の方法。
- 前記ケイ素含有表面が、酸化ケイ素、窒化ケイ素、又はこれらの組み合わせを含む、請求項1に記載の方法。
- 炭化タングステン膜を形成する方法であって、
第1の堆積速度で基板のケイ素含有表面に炭化タングステン開始層を形成することであって、2Torrから10Torrの範囲内の第1の圧力で100ワット以下の第1のRFプラズマ出力を含む第1のPECVD処理において、前記ケイ素含有表面を、WF6、C3H6、及びH2を含む第1の反応性ガスに曝露することを含む、炭化タングステン開始層を形成することと、
第2の堆積速度で前記炭化タングステン開始層に炭化タングステン膜を形成することであって、2Torrから10Torrの範囲内の第2の圧力で500ワット以上の第2のRFプラズマ出力を含む第2のPECVD処理において、前記炭化タングステン開始層を、WF6、C3H6、及び任意選択的にH2を含む第2の反応性ガスに曝露することを含む、炭化タングステン膜を形成することと
を含み、
前記第2の堆積速度が、前記第1の堆積速度より大きい、方法。 - 前記第2の堆積速度対前記第1の堆積速度の比率が、3:1以上である、請求項11に記載の方法。
- 前記第2の堆積速度が、30Å/秒以上であり、前記第1の堆積速度が、10Å/秒以下である、請求項12に記載の方法。
- 前記第2の堆積速度が、30Å/秒から40Å/秒の範囲内にあり、前記第1の堆積速度が、5Å/秒から10Å/秒の範囲内にある、請求項13に記載の方法。
- 前記炭化タングステン開始層が、10Åから200Åの範囲内の厚さを有する、請求項11に記載の方法。
- 炭化タングステン膜を形成する方法であって、
第1の堆積速度で基板のケイ素含有表面に炭化タングステン開始層を形成することであって、2Torrから10Torrの範囲内の第1の圧力で100ワット以下の第1のRFプラズマ出力を含む第1のPECVD処理において、前記ケイ素含有表面を、WF6、C3H6、及びH2を含む第1の反応性ガスに曝露することを含む、炭化タングステン開始層を形成することと、
第2の堆積速度で前記炭化タングステン開始層に炭化タングステン膜を形成することであって、2Torrから10Torrの範囲内の第2の圧力で500ワット以上の第2のRFプラズマ出力を含む第2のPECVD処理において、前記炭化タングステン開始層を、WF6、C3H6、及び任意選択的にH2を含む第2の反応性ガスに曝露することを含む、炭化タングステン膜を形成することと
を含み、
前記第2の堆積速度が、前記第1の堆積速度より大きく、
前記炭化タングステン開始層が、10Åから200Åの範囲内の厚さを有し、
前記炭化タングステン膜が、5,000Å以上の厚さを有する、方法。 - 前記第1の反応性ガス内のC 3 H 6 とWF 6 が、2:1以上の比率(C 3 H 6 :WF 6 )で存在する、請求項16に記載の方法。
- 前記第2の堆積速度対前記第1の堆積速度の比率が、3:1以上である、請求項17に記載の方法。
- 前記第2の堆積速度が、30Å/秒以上であり、前記第1の堆積速度が、10Å/秒以下である、請求項18に記載の方法。
- 前記第2の堆積速度が、30Å/秒から40Å/秒の範囲内にあり、前記第1の堆積速度が、5Å/秒から10Å/秒の範囲内にある、請求項19に記載の方法。
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