JP7366019B2 - エッチング残留物の少ない金属酸化物のエッチング方法 - Google Patents
エッチング残留物の少ない金属酸化物のエッチング方法 Download PDFInfo
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- JP7366019B2 JP7366019B2 JP2020531606A JP2020531606A JP7366019B2 JP 7366019 B2 JP7366019 B2 JP 7366019B2 JP 2020531606 A JP2020531606 A JP 2020531606A JP 2020531606 A JP2020531606 A JP 2020531606A JP 7366019 B2 JP7366019 B2 JP 7366019B2
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- 229910044991 metal oxide Inorganic materials 0.000 title claims description 56
- 150000004706 metal oxides Chemical class 0.000 title claims description 56
- 238000000034 method Methods 0.000 title claims description 45
- 238000005530 etching Methods 0.000 title description 13
- 239000000758 substrate Substances 0.000 claims description 72
- 229910052751 metal Inorganic materials 0.000 claims description 31
- 239000002184 metal Substances 0.000 claims description 31
- 229910001507 metal halide Inorganic materials 0.000 claims description 27
- 150000005309 metal halides Chemical class 0.000 claims description 27
- 239000003638 chemical reducing agent Substances 0.000 claims description 20
- 238000010926 purge Methods 0.000 claims description 9
- 230000003647 oxidation Effects 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 7
- 238000003672 processing method Methods 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000011261 inert gas Substances 0.000 claims description 6
- WIDQNNDDTXUPAN-UHFFFAOYSA-I tungsten(v) chloride Chemical compound Cl[W](Cl)(Cl)(Cl)Cl WIDQNNDDTXUPAN-UHFFFAOYSA-I 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 6
- 239000000463 material Substances 0.000 description 13
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 6
- 239000010937 tungsten Substances 0.000 description 6
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- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
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- 239000011630 iodine Substances 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
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- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 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 description 1
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- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 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
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- -1 technitium Chemical compound 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- 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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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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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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Description
Claims (13)
- 基板処理方法であって、
酸化金属層の一部をエッチングして固体エッチング残留物を生成するために、前記酸化金属層を含む基板を金属ハロゲン化物に曝露することと、
前記固体エッチング残留物を除去するために、前記基板を、H 2 又はB 2 H 6 のうちの一方又は両方を含む還元剤に暴露することと
を含む方法。 - 前記酸化金属層の平均酸化状態が、化学量論的金属酸化物の平均酸化状態よりも低い、請求項1に記載の方法。
- 前記酸化金属層は準化学量論的金属酸化物を含む、請求項2に記載の方法。
- 前記金属酸化物が、N、Si、又はCのうちの1又は複数を含む、請求項2に記載の方法。
- 前記酸化金属層及び前記金属ハロゲン化物が同じ金属種を含む、請求項1に記載の方法。
- 前記金属ハロゲン化物が、本質的にWF6又はWCl5で構成される、請求項1に記載の方法。
- 前記基板処理方法が、5トール以上の圧力で実施される、請求項1に記載の方法。
- 前記基板が400℃以下の温度に維持される、請求項1に記載の方法。
- 基板処理方法であって、
(A)処理容積を有する処理チャンバ内に酸化金属層を含む基板を提供することと、
(B)前記酸化金属層の一部を除去して固体エッチング残留物を生成するために、前記基板を金属ハロゲン化物に暴露することと、
(C)前記固体エッチング残留物を除去するために、前記基板を、H 2 又はB 2 H 6 のうちの一方又は両方を含む還元剤に暴露することと、
(D)前記酸化金属層の所定の厚さが除去されるまで(B)及び(C)を繰り返すことと
を含む方法。 - 前記基板を前記金属ハロゲン化物に暴露した後に前記処理容積をパージすることと、前記基板を前記還元剤に暴露した後に前記処理容積をパージすることとを更に含む、請求項9に記載の方法。
- 前記酸化金属層がWO3を含む、請求項9に記載の方法。
- 前記金属ハロゲン化物が、WF6又はWCI5のうちの1又は複数を含む、請求項9に記載の方法。
- 基板処理方法であって、
(A)処理容積を有する処理チャンバ内にWO3層を含む基板を提供することと、
(B)前記WO3層の一部を除去して固体エッチング残留物を生成するために、前記基板をWF6又はWCl5のうちの1又は複数を含むエッチング剤に暴露することと、
(C)前記処理容積を不活性ガスでパージすることと、
(D)前記固体エッチング残留物を除去するために、前記基板をH2を含む還元剤に暴露することと、
(E)前記処理容積を不活性ガスでパージすることと、
(F)前記WO3層の所定の厚さが除去されるまで(B)から(E)を繰り返すことと
を含む方法。
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