JP2023531203A - 希ガスによる極低温原子層エッチング - Google Patents
希ガスによる極低温原子層エッチング Download PDFInfo
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- 229910052756 noble gas Inorganic materials 0.000 title claims abstract description 55
- 238000005530 etching Methods 0.000 title claims abstract description 53
- 239000000758 substrate Substances 0.000 claims abstract description 157
- 238000000034 method Methods 0.000 claims abstract description 88
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 74
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 74
- 239000011737 fluorine Substances 0.000 claims abstract description 74
- 238000002161 passivation Methods 0.000 claims abstract description 60
- 150000002500 ions Chemical class 0.000 claims abstract description 38
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 36
- 239000010703 silicon Substances 0.000 claims abstract description 36
- 239000002243 precursor Substances 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims description 60
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 35
- 229910052724 xenon Inorganic materials 0.000 claims description 29
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 28
- 239000001307 helium Substances 0.000 claims description 22
- 229910052734 helium Inorganic materials 0.000 claims description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 16
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 14
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 9
- 229910052786 argon Inorganic materials 0.000 claims description 8
- 229910052743 krypton Inorganic materials 0.000 claims description 8
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052754 neon Inorganic materials 0.000 claims description 6
- IGELFKKMDLGCJO-UHFFFAOYSA-N xenon difluoride Chemical compound F[Xe]F IGELFKKMDLGCJO-UHFFFAOYSA-N 0.000 claims description 6
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 29
- 238000009833 condensation Methods 0.000 abstract 1
- 230000005494 condensation Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 18
- -1 helium ions Chemical class 0.000 description 16
- 230000004907 flux Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 9
- 239000012530 fluid Substances 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 238000004590 computer program Methods 0.000 description 6
- 239000011261 inert gas Substances 0.000 description 6
- 230000015654 memory Effects 0.000 description 5
- 150000002835 noble gases Chemical class 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000678 plasma activation Methods 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 230000002269 spontaneous effect Effects 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 239000002210 silicon-based material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- BLIQUJLAJXRXSG-UHFFFAOYSA-N 1-benzyl-3-(trifluoromethyl)pyrrolidin-1-ium-3-carboxylate Chemical compound C1C(C(=O)O)(C(F)(F)F)CCN1CC1=CC=CC=C1 BLIQUJLAJXRXSG-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- XPDWGBQVDMORPB-UHFFFAOYSA-N Fluoroform Chemical compound FC(F)F XPDWGBQVDMORPB-UHFFFAOYSA-N 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 238000001994 activation Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 150000001722 carbon compounds Chemical class 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000013529 heat transfer fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229920006260 polyaryletherketone Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- ARUUTJKURHLAMI-UHFFFAOYSA-N xenon hexafluoride Chemical compound F[Xe](F)(F)(F)(F)F ARUUTJKURHLAMI-UHFFFAOYSA-N 0.000 description 1
- RPSSQXXJRBEGEE-UHFFFAOYSA-N xenon tetrafluoride Chemical compound F[Xe](F)(F)F RPSSQXXJRBEGEE-UHFFFAOYSA-N 0.000 description 1
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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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
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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
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- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
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Abstract
Description
Claims (20)
- 基板内のフィーチャをエッチングする方法であって、
チャンバ内に配置された基板を第1の希ガスの三重点温度未満の温度に冷却すること、
前記基板の露出部分上に不活性層を形成するために、前記第1の希ガスを前記チャンバの中に流すこと、
前記不活性層上にフッ素含有層を形成ために、フッ素含有前駆体ガスを前記チャンバの中に流すこと、
前記基板の前記露出部分上にパッシベーション層を形成するために、前記フッ素含有層及び前記不活性層をエネルギー源に曝露すること、並びに
前記基板をエッチングするために、前記基板をイオンに曝露することを含む、方法。 - 前記温度は、摂氏-105度から摂氏-120度である、請求項1に記載の方法。
- 前記第1の希ガスは、キセノンとクリプトンとから選択される、請求項1に記載の方法。
- 前記フッ素含有前駆体ガスは、SF6、NF3、及びF2から選択される、請求項3に記載の方法。
- 前記基板をイオンに曝露することは、
前記基板にRFバイアス電圧を印加すること、及び
第2の希ガスから前記イオンを生成することを更に含む、請求項1に記載の方法。 - 前記第2の希ガスは、ヘリウム、ネオン、アルゴン、及びキセノンから選択される、請求項5に記載の方法。
- 前記基板は、シリコン層上に配置された酸化ケイ素層を含む、請求項6に記載の方法。
- 基板内のフィーチャをエッチングする方法であって、
シリコンを含む基板をチャンバ内の基板支持体上に受け取ることであって、前記基板支持体は、冷却機を有し、前記基板を冷却するために動作可能である、シリコンを含む基板をチャンバ内の基板支持体上に受け取ること、
前記冷却機を冷却することによって、前記基板を摂氏-100度以下の温度に冷却すること、
前記シリコンの表面の部分をキセノン層でコーティングするために、キセノン前駆体ガスを前記チャンバの中に流すこと、
前記キセノン層をフッ素含有層でコーティングするために、フッ素含有前駆体ガスを前記チャンバの中に流すこと、
フッ化キセノンパッシベーション層を形成するために、前記キセノン層及び前記フッ素含有層をエネルギー源に曝露すること、並びに
前記シリコンの前記表面からシリコンをエッチングするために、前記基板をイオンに曝露することを含む、方法。 - 前記温度は、摂氏-105度から摂氏-120度である、請求項8に記載の方法。
- 前記フッ素含有前駆体ガスは、SF6、NF3、及びF2から選択される、請求項9に記載の方法。
- 前記基板をイオンに曝露することは、
前記基板支持体内の電極にRFバイアス電圧を印加すること、及び
前記チャンバの中に希ガスを流すことを更に含む、請求項8に記載の方法。 - 前記希ガスはヘリウムである、請求項11に記載の方法。
- 前記フッ化キセノンパッシベーション層は、前記基板内に形成されたフィーチャの側壁上に形成され、前記フィーチャが前記基板内で垂直方向にエッチングされるときに、前記フィーチャの横方向のエッチングを防止し又は遅らせる、請求項11に記載の方法。
- 前記シリコンの少なくとも一部分上に形成された酸化ケイ素の層を更に含む、請求項11に記載の方法。
- 前記基板は、少なくとも1つのフィーチャを有し、前記少なくとも1つのフィーチャは、前記基板の上面から下面へフィーチャ深さだけ延在し、前記少なくとも1つのフィーチャは、第1の側壁及び第2の側壁によって画定される幅を有し、前記パッシベーション層は、前記基板の前記上面、前記少なくとも1つのフィーチャの前記第1の側壁、前記第2の側壁、及び前記下面上に形成される、請求項11に記載の方法。
- 基板内のフィーチャをエッチングする方法であって、
シリコンを含む基板をチャンバ内の基板支持体上に受け取ることであって、前記基板は、基板表面、及び前記基板表面に形成された少なくとも1つのフィーチャを有し、前記少なくとも1つのフィーチャは、前記基板表面から延在し、側壁及び下面を有し、前記基板支持体は、前記基板を冷却するように動作可能な冷却機を有する、シリコンを含む基板をチャンバ内の基板支持体上に受け取ること、
前記冷却機を冷却することによって、前記基板を摂氏-100度以下の温度に冷却すること、
前記基板表面、前記少なくとも1つのフィーチャの前記側壁、及び前記下面の上にパッシベーション層を形成することであって、
前記基板表面の部分をキセノン層でコーティングするために、キセノン前駆体ガスを前記チャンバの中に流すこと、
前記キセノン層をフッ素含有層でコーティングするために、フッ素含有前駆体ガスを前記チャンバの中に流すこと、及び
前記パッシベーション層を形成するために、前記キセノン層及び前記フッ素含有層をプラズマに曝露することを含む、パッシベーション層を形成すること、並びに
前記下面からシリコンをエッチングするために、前記基板をイオンに曝露することを含む、方法。 - 前記温度は、摂氏-105度から摂氏-120度である、請求項16に記載の方法。
- 前記フッ素含有前駆体ガスは、SF6、NF3、及びF2から選択される、請求項17に記載の方法。
- 前記基板をイオンに曝露することは、
前記基板支持体内の電極にRFバイアス電圧を印加すること、及び
前記チャンバの中に希ガスを流すことを更に含む、請求項16に記載の方法。 - 前記希ガスはヘリウムである、請求項19に記載の方法。
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