JP2023029868A - タングステン柱を形成する方法 - Google Patents
タングステン柱を形成する方法 Download PDFInfo
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 229910052721 tungsten Inorganic materials 0.000 title claims abstract description 54
- 239000010937 tungsten Substances 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000000758 substrate Substances 0.000 claims abstract description 77
- 229910021417 amorphous silicon Inorganic materials 0.000 claims abstract description 34
- 238000000151 deposition Methods 0.000 claims abstract description 29
- 238000003672 processing method Methods 0.000 claims abstract description 5
- 239000012528 membrane Substances 0.000 claims description 34
- 239000002243 precursor Substances 0.000 claims description 28
- 230000008569 process Effects 0.000 claims description 12
- 239000000376 reactant Substances 0.000 claims description 11
- 239000001257 hydrogen Substances 0.000 claims description 10
- 229910052739 hydrogen Inorganic materials 0.000 claims description 10
- 238000005530 etching Methods 0.000 claims description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 5
- PZPGRFITIJYNEJ-UHFFFAOYSA-N disilane Chemical compound [SiH3][SiH3] PZPGRFITIJYNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 229910000077 silane Inorganic materials 0.000 claims description 5
- VEDJZFSRVVQBIL-UHFFFAOYSA-N trisilane Chemical compound [SiH3][SiH2][SiH3] VEDJZFSRVVQBIL-UHFFFAOYSA-N 0.000 claims description 5
- 238000001020 plasma etching Methods 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims 1
- 239000010408 film Substances 0.000 description 127
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- 239000000463 material Substances 0.000 description 10
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- 238000005137 deposition process Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 7
- 239000010703 silicon Substances 0.000 description 7
- 238000000231 atomic layer deposition Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000011261 inert gas Substances 0.000 description 6
- 238000005429 filling process Methods 0.000 description 5
- 239000012686 silicon precursor Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
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- 230000009969 flowable effect Effects 0.000 description 4
- 238000009616 inductively coupled plasma Methods 0.000 description 4
- 238000000197 pyrolysis Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 239000002019 doping agent Substances 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 238000000059 patterning Methods 0.000 description 3
- 238000005240 physical vapour deposition Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 238000005979 thermal decomposition reaction Methods 0.000 description 3
- -1 tungsten halide Chemical class 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- 229910052732 germanium Inorganic materials 0.000 description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- YLAFGLJNWFUJLU-UHFFFAOYSA-N $l^{2}-germane;$l^{3}-germane Chemical compound [GeH2].[GeH2].[GeH2].[GeH3].[GeH3] YLAFGLJNWFUJLU-UHFFFAOYSA-N 0.000 description 1
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- OFZCMPKIAFHGRP-UHFFFAOYSA-N [GeH3][GeH2][GeH2][GeH2][GeH2][GeH3] Chemical compound [GeH3][GeH2][GeH2][GeH2][GeH2][GeH3] OFZCMPKIAFHGRP-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 210000003323 beak Anatomy 0.000 description 1
- LUXIMSHPDKSEDK-UHFFFAOYSA-N bis(disilanyl)silane Chemical compound [SiH3][SiH2][SiH2][SiH2][SiH3] LUXIMSHPDKSEDK-UHFFFAOYSA-N 0.000 description 1
- WYEMLYFITZORAB-UHFFFAOYSA-N boscalid Chemical compound C1=CC(Cl)=CC=C1C1=CC=CC=C1NC(=O)C1=CC=CN=C1Cl WYEMLYFITZORAB-UHFFFAOYSA-N 0.000 description 1
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- VXGHASBVNMHGDI-UHFFFAOYSA-N digermane Chemical compound [Ge][Ge] VXGHASBVNMHGDI-UHFFFAOYSA-N 0.000 description 1
- LICVGLCXGGVLPA-UHFFFAOYSA-N disilanyl(disilanylsilyl)silane Chemical compound [SiH3][SiH2][SiH2][SiH2][SiH2][SiH3] LICVGLCXGGVLPA-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 229910000078 germane Inorganic materials 0.000 description 1
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- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
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- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- WLKSSWJSFRCZKL-UHFFFAOYSA-N trimethylgermanium Chemical compound C[Ge](C)C WLKSSWJSFRCZKL-UHFFFAOYSA-N 0.000 description 1
- PQDJYEQOELDLCP-UHFFFAOYSA-N trimethylsilane Chemical compound C[SiH](C)C PQDJYEQOELDLCP-UHFFFAOYSA-N 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
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- 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
- H01L21/76877—Filling of holes, grooves or trenches, e.g. vias, with conductive material
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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
- H01L21/0334—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
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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
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- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
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Abstract
【解決手段】処理方法であって、基板100表面に少なくとも1つの特徴を形成するパターニングされた膜130を設けることと、前記特徴を充填し且つ前記パターニングされた膜の上面の上で延在するように、約-100℃から約50℃までの温度範囲で、アモルファスシリコン膜145をパターニングされた膜に堆積させること、前記アモルファスシリコン膜の上部を前記パターニングされた膜の前記上面より低い高さに下げるために前記アモルファスシリコン膜を凹ませて、凹んだアモルファスシリコン膜を形成することと、前記凹んだアモルファスシリコン膜をタングステン膜に変換させることと、前記タングステン膜を膨張させて、前記少なくとも1つの特徴から延在する柱を形成することとを含む方法である。
【選択図】図2C
Description
Claims (15)
- 処理方法であって、
基板表面に少なくとも1つの特徴を形成するパターニングされた膜を設けることであって、前記少なくとも1つの特徴が、前記パターニングされた膜の上面から底面へと深さにわたって延在し、前記少なくとも1つの特徴が、第1の側壁及び第2の側壁によって画定された幅を有する、パターニングされた膜を設けることと、
前記少なくとも1つの特徴を充填し且つ前記パターニングされた膜の前記上面の上で延在するように、膜を前記パターニングされた膜に堆積することと、
前記膜の上部を前記パターニングされた膜の前記上面に等しいか又はそれより低い高さに下げるために前記膜を凹ませて、凹んだ膜を形成することと、
前記凹んだ膜をタングステン膜に変換させることと、
前記タングステン膜を膨張させて、前記少なくとも1つの特徴から延在する柱を形成することと
を含む方法。 - 前記膜が、アモルファスシリコンを含む、請求項1に記載の方法。
- 前記膜を堆積することが、前記基板を、シラン、ジシラン、トリシラン、又はテトラシランのうちの1つ又は複数を含む前駆体に曝露することを含む、請求項2に記載の方法。
- 前記膜を堆積することが、約300℃から約550℃の範囲内の温度で行われる、請求項3に記載の方法。
- 前記膜を堆積することが、約10Tから約600Tの範囲内の圧力で行われる、請求項4に記載の方法。
- 前記膜を堆積することが、前記前駆体のための共反応体がない状態で行われる、請求項5に記載の方法。
- 前記膜を堆積することが、約-100℃から約50℃の範囲内の温度で行われる、請求項3に記載の方法。
- 前記膜を堆積することが、約1Tからから約10Tの範囲内の圧力で行われる、請求項7に記載の方法。
- 前記膜を堆積することが、約10Wから約200Wの範囲内の電力を有するRFプラズマを用いて行われる、請求項8に記載の方法。
- 前記膜を堆積することが、前記前駆体のための共反応体がない状態で行われる、請求項9に記載の方法。
- 前記膜を凹ませることが、前記膜をエッチングすることを含む、請求項1に記載の方法。
- 前記膜をエッチングすることが、臭素系エッチャントを使用する反応性イオンエッチング処理を含む、請求項11に記載の方法。
- 前記膜を凹ませることが、前記膜を水素プラズマ又は水素ラジカルに曝露することを含む、請求項11に記載の方法。
- 前記凹んだ膜をタングステン膜に変換させることが、前記凹んだ膜をWF6に曝露することを含む、請求項1に記載の方法。
- 前記タングステン膜を膨張させることが、前記タングステン膜を酸化することを含む、請求項1に記載の方法。
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