JP4629421B2 - ドライエッチング方法及びドライエッチング装置 - Google Patents
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- 238000001312 dry etching Methods 0.000 title claims description 32
- 238000000034 method Methods 0.000 title claims description 21
- 238000005530 etching Methods 0.000 claims description 193
- 239000010410 layer Substances 0.000 claims description 142
- 239000011241 protective layer Substances 0.000 claims description 25
- 239000002210 silicon-based material Substances 0.000 claims description 25
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 14
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 101
- 150000002500 ions Chemical class 0.000 description 22
- 239000000758 substrate Substances 0.000 description 17
- 229920000642 polymer Polymers 0.000 description 9
- 229920002313 fluoropolymer Polymers 0.000 description 8
- 229960000909 sulfur hexafluoride Drugs 0.000 description 7
- -1 Polytetrafluoroethylene Polymers 0.000 description 6
- 229910018503 SF6 Inorganic materials 0.000 description 6
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 6
- 229910052814 silicon oxide Inorganic materials 0.000 description 6
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000007795 chemical reaction product Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 229910021417 amorphous silicon Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 4
- 229920005591 polysilicon Polymers 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- XPDWGBQVDMORPB-UHFFFAOYSA-N Fluoroform Chemical compound FC(F)F XPDWGBQVDMORPB-UHFFFAOYSA-N 0.000 description 2
- 229910016006 MoSi Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910008484 TiSi Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- YXTPWUNVHCYOSP-UHFFFAOYSA-N bis($l^{2}-silanylidene)molybdenum Chemical compound [Si]=[Mo]=[Si] YXTPWUNVHCYOSP-UHFFFAOYSA-N 0.000 description 2
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 2
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 2
- 229910021344 molybdenum silicide Inorganic materials 0.000 description 2
- QKCGXXHCELUCKW-UHFFFAOYSA-N n-[4-[4-(dinaphthalen-2-ylamino)phenyl]phenyl]-n-naphthalen-2-ylnaphthalen-2-amine Chemical compound C1=CC=CC2=CC(N(C=3C=CC(=CC=3)C=3C=CC(=CC=3)N(C=3C=C4C=CC=CC4=CC=3)C=3C=C4C=CC=CC4=CC=3)C3=CC4=CC=CC=C4C=C3)=CC=C21 QKCGXXHCELUCKW-UHFFFAOYSA-N 0.000 description 2
- 235000019407 octafluorocyclobutane Nutrition 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 2
- 229910021341 titanium silicide Inorganic materials 0.000 description 2
- WQJQOUPTWCFRMM-UHFFFAOYSA-N tungsten disilicide Chemical compound [Si]#[W]#[Si] WQJQOUPTWCFRMM-UHFFFAOYSA-N 0.000 description 2
- 229910021342 tungsten silicide Inorganic materials 0.000 description 2
- DGLFZUBOMRZNQX-UHFFFAOYSA-N 1,1,2,2,3,3-hexafluorocyclobutane Chemical compound FC1(F)CC(F)(F)C1(F)F DGLFZUBOMRZNQX-UHFFFAOYSA-N 0.000 description 1
- YBMDPYAEZDJWNY-UHFFFAOYSA-N 1,2,3,3,4,4,5,5-octafluorocyclopentene Chemical compound FC1=C(F)C(F)(F)C(F)(F)C1(F)F YBMDPYAEZDJWNY-UHFFFAOYSA-N 0.000 description 1
- 239000004812 Fluorinated ethylene propylene Substances 0.000 description 1
- 239000004341 Octafluorocyclobutane Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- QHSJIZLJUFMIFP-UHFFFAOYSA-N ethene;1,1,2,2-tetrafluoroethene Chemical group C=C.FC(F)=C(F)F QHSJIZLJUFMIFP-UHFFFAOYSA-N 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- BCCOBQSFUDVTJQ-UHFFFAOYSA-N octafluorocyclobutane Chemical compound FC1(F)C(F)(F)C(F)(F)C1(F)F BCCOBQSFUDVTJQ-UHFFFAOYSA-N 0.000 description 1
- 229920009441 perflouroethylene propylene Polymers 0.000 description 1
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 1
- QHMQWEPBXSHHLH-UHFFFAOYSA-N sulfur tetrafluoride Chemical compound FS(F)(F)F QHMQWEPBXSHHLH-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—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
- 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
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/3213—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
- H01L21/32133—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only
- H01L21/32135—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only by vapour etching only
- H01L21/32136—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only by vapour etching only using plasmas
- H01L21/32137—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only by vapour etching only using plasmas of silicon-containing layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—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
- 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
- H01L21/3065—Plasma etching; Reactive-ion etching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/32091—Radio frequency generated discharge the radio frequency energy being capacitively coupled to the plasma
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Drying Of Semiconductors (AREA)
Description
図1は、本発明の参考例に係るドライエッチング方法に使用する装置の一例を示す。
図4は、本発明の実施形態に係るドライエッチング方法に使用する装置の一例を示す。なお、基板12は参考例と同様に、SiO2からなるエッチングストップ層21、エッチングストップ層21上に形成されたSiからなる被エッチング層22、及び被エッチング層22上には所望のパターンで形成されたレジストマスク23を備える。
12 基板
13 チャンバ
13a ガス導入口
13b 排気口
14A,14B 高周波電源
15 上部電極
16 下部電極
17 ガイドリング
18,18A,18B エッチングガス供給源
19 真空排気装置
20 制御装置
21 エッチングストップ層
22 被エッチング層
23 レジストマスク
24,24A,24B 側壁保護層
P プラズマ
Claims (5)
- エッチングストップ層上にシリコン系材料からなる被エッチング層が形成され、かつこの被エッチング層の表面にマスクが形成された処理対象物を、それぞれの高周波電源に接続された真空容器内の上側電極と下側電極のうち下側電極上に配置し、
前記真空容器内に、プラズマ発生時に前記被エッチング層のエッチング種を生じる第1のガス成分と、前記被エッチング層を構成するシリコン系材料のSi原子と反応して付着性の生成物を生成する第2のガス成分とを含む第1のエッチングガスを導入し、
前記上側及び下側電極にそれぞれの前記高周波電源から高周波電力を供給して前記真空容器内にプラズマを発生させ、前記第2のガス成分と前記シリコン系材料のSi原子の反応による前記生成物で第1の側壁保護層を形成しつつ、前記被エッチング層の表面の前記マスクから露呈する部分を前記第1のガス成分により生じる前記エッチング種によりエッチングし、
前記被エッチング層のエッチング深さが被エッチング層の厚さの50%以上に達した後であって前記エッチング深さが前記被エッチング層の前記エッチングストップ層との界面に達する前に前記第1のエッチングガスによるエッチングを停止した後、前記第1のガス成分と、CHF3、C5F8、又はC4F6である第3のガス成分とを含む第2のエッチングガスを導入し、
前記上側及び下側電極にそれぞれの前記高周波電源から高周波電力を供給して前記真空容器内にプラズマを発生させ、前記第3のガス成分による生成物で第2の側壁保護層を形成しつつ、前記被エッチング層の表面の前記マスクから露呈する部分を前記エッチング深さが前記被エッチング層の前記エッチングストップ層との界面に達するまで前記第1のガス成分により生じる前記エッチング種によりエッチングする、ドライエッチング方法。 - 前記第1のガス成分はSF6である、請求項1に記載のドライエッチング方法。
- 前記第1のガス成分は、CF4、C3F6、又はNF3である、請求項1に記載のドライエッチング方法。
- 前記被エッチング層はSiであり、前記エッチングストップ層はSiO2である、請求項1から請求項3のいずれか1項に記載のドライエッチング方法。
- 上側電極及び下側電極がその内部に配設され、エッチングストップ層上にシリコン系材料からなる被エッチング層が形成され、かつこの被エッチング層の表面にマスクが形成された処理対象物が前記下側電極上に配置される真空容器と、
前記被エッチング層のエッチング種を生じる第1のガス成分と、前記被エッチング層を構成するシリコン系材料のSi原子と反応して付着性の生成物を生成する第2のガス成分とを含む第1のエッチングガスを前記真空容器内に供給可能な第1のエッチングガス供給源と、
前記第1のガス成分と、CHF3、C5F8、又はC4F6である第3のガス成分とを含む第2のエッチングガスを前記真空容器内に供給可能な第2のエッチングガス供給源と、
前記真空容器内にプラズマを発生させるために前記上側及び下側電極に高周波電力を供給するそれぞれの高周波電源と、
前記第1のエッチングガス供給源が前記第1のエッチングガスを前記真空容器内に供給し、かつ前記上側及び下側電極にそれぞれの前記高周波電源から高周波電力を供給して前記真空容器内にプラズマを発生させる状態を前記被エッチング層のエッチング深さが被エッチング層の厚さの50%以上に達した後であって前記エッチング深さが前記被エッチング層の前記エッチングストップ層との界面に達する前までの第1の時間は継続した後、前記第2のエッチングガス供給源が前記第2のエッチングガスを前記真空容器内に供給し、かつ前記上側及び下側電極にそれぞれの前記高周波電源から高周波電力を供給して前記真空容器内にプラズマを発生させる状態を前記被エッチング層の前記被エッチング深さが前記被エッチング層の前記エッチングストップ層との界面に達するまでの第2の時間は継続するように、前記第1及び第2のエッチングガス供給源並びに前記高周波発生源を制御する制御装置と
を備えるドライエッチング装置。
Priority Applications (6)
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JP2004352614A JP4629421B2 (ja) | 2004-12-06 | 2004-12-06 | ドライエッチング方法及びドライエッチング装置 |
TW094142763A TW200629403A (en) | 2004-12-06 | 2005-12-05 | Dry etching method and apparatus |
KR1020077012669A KR20070085776A (ko) | 2004-12-06 | 2005-12-06 | 건식 에칭 방법 및 건식 에칭 장치 |
PCT/JP2005/022351 WO2006062085A1 (ja) | 2004-12-06 | 2005-12-06 | ドライエッチング方法及びドライエッチング装置 |
US11/792,238 US20080093338A1 (en) | 2004-12-06 | 2005-12-06 | Dry Etching Method And Dry Etching Apparatus |
US13/336,446 US20120094500A1 (en) | 2004-12-06 | 2011-12-23 | Dry etching method and dry etching apparatus |
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JP2006165164A JP2006165164A (ja) | 2006-06-22 |
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JP (1) | JP4629421B2 (ja) |
KR (1) | KR20070085776A (ja) |
TW (1) | TW200629403A (ja) |
WO (1) | WO2006062085A1 (ja) |
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JP5154260B2 (ja) * | 2008-02-26 | 2013-02-27 | パナソニック株式会社 | ドライエッチング方法及びドライエッチング装置 |
TWI495009B (zh) * | 2010-02-12 | 2015-08-01 | Advanced Micro Fab Equip Inc | A Plasma Etching Method with Silicon Insulating Layer |
KR20120031811A (ko) | 2010-09-27 | 2012-04-04 | 삼성전자주식회사 | 반도체 장치 및 그 제조 방법 |
US9318341B2 (en) | 2010-12-20 | 2016-04-19 | Applied Materials, Inc. | Methods for etching a substrate |
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KR102153246B1 (ko) | 2012-10-30 | 2020-09-07 | 레르 리키드 쏘시에떼 아노님 뿌르 레드 에렉스뿔라따시옹 데 프로세데 조르즈 클로드 | 규소-함유 필름의 에칭을 위한 방법 및 에칭 가스 |
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JP2002176182A (ja) * | 2000-12-06 | 2002-06-21 | Denso Corp | 容量式力学量センサの製造方法 |
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JP2005268765A (ja) * | 2004-02-17 | 2005-09-29 | Sanyo Electric Co Ltd | 半導体装置の製造方法 |
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WO2006062085A1 (ja) | 2006-06-15 |
TW200629403A (en) | 2006-08-16 |
JP2006165164A (ja) | 2006-06-22 |
KR20070085776A (ko) | 2007-08-27 |
US20080093338A1 (en) | 2008-04-24 |
US20120094500A1 (en) | 2012-04-19 |
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