JP5767199B2 - 半導体製造装置及び半導体製造方法 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims description 44
- 238000004519 manufacturing process Methods 0.000 title claims description 42
- 238000000034 method Methods 0.000 claims description 133
- 239000007789 gas Substances 0.000 claims description 81
- 238000005530 etching Methods 0.000 claims description 73
- RWRIWBAIICGTTQ-UHFFFAOYSA-N difluoromethane Chemical compound FCF RWRIWBAIICGTTQ-UHFFFAOYSA-N 0.000 claims description 56
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 54
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 46
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 46
- 239000000758 substrate Substances 0.000 claims description 43
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 32
- 239000001301 oxygen Substances 0.000 claims description 32
- 229910052760 oxygen Inorganic materials 0.000 claims description 32
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 32
- 229920005591 polysilicon Polymers 0.000 claims description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 31
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 31
- 229910052757 nitrogen Inorganic materials 0.000 claims description 27
- 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 claims description 18
- 150000004767 nitrides Chemical class 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229920006254 polymer film Polymers 0.000 claims description 6
- 239000010408 film Substances 0.000 description 104
- 239000010409 thin film Substances 0.000 description 10
- XPDWGBQVDMORPB-UHFFFAOYSA-N Fluoroform Chemical compound FC(F)F XPDWGBQVDMORPB-UHFFFAOYSA-N 0.000 description 8
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- YUCFVHQCAFKDQG-UHFFFAOYSA-N fluoromethane Chemical compound F[CH] YUCFVHQCAFKDQG-UHFFFAOYSA-N 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000009616 inductively coupled plasma Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000004380 ashing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000007740 vapor deposition Methods 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
- H01L21/02—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
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31105—Etching inorganic layers
- H01L21/31111—Etching inorganic layers by chemical means
- H01L21/31116—Etching inorganic layers by chemical means by dry-etching
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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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
- H01L21/31—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
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31127—Etching organic layers
- H01L21/31133—Etching organic layers by chemical means
- H01L21/31138—Etching organic layers by chemical means by dry-etching
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- H—ELECTRICITY
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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
- H01L21/02—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
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- Chemical Kinetics & Catalysis (AREA)
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- Microelectronics & Electronic Packaging (AREA)
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- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
Description
サセプタの温度:0〜70℃
ジフルオロメタンCH2F2ガスの供給量:10〜500SCCM
三フッ化窒素NF3ガスの供給量:0〜1000SCCM
窒素N2ガスの供給量:100〜2500SCCM
酸素O2ガスの供給量:100〜2500SCCM
電力:1000〜3000W
工程チャンバー内の圧力:300〜1000mTorr。
200・・・排気ユニット
300・・・プラズマ供給部材
310・・・プラズマチャンバー
320・・・ソースガス供給部
330・・・電力印加部
340・・・流入ダクト
Claims (20)
- シリコン酸化膜またはポリシリコン膜上に形成されたシリコン窒化膜を選択的にエッチングする半導体製造方法において、
工程チャンバー内に基板を位置させ、前記工程チャンバーの外部で第1ソースガスからプラズマを発生させ、前記プラズマを前記工程チャンバーへ供給し、
前記第1ソースガスはジフルオロメタンCH2F2、窒素N2、及び酸素O2を含むガス(CF4を含むものを除く)であり、前記ジフルオロメタンCH2F2の供給量は10〜500SCCMであり、前記窒素の供給量は100〜500SCCMであり、前記酸素の供給量は1500〜2500SCCMである半導体製造方法。 - 工程進行の際、前記基板が置かれるサセプタの温度は0〜70℃であり、前記工程チャンバー内の圧力は300〜1000mTorrである請求項1に記載の半導体製造方法。
- 工程進行の際、前記プラズマを発生させるために供給される電力は1000〜3000Wである請求項2に記載の半導体製造方法。
- 前記プラズマが前記工程チャンバーへ供給される通路へ第2ソースガスが供給され、
前記第2ソースガスは三フッ化窒素NF3を含む請求項1〜請求項3のいずれか1項に記載の半導体製造方法。 - 工程進行の時、前記三フッ化窒素の供給量は0より大きくて1000SCCM以下である請求項4に記載の半導体製造方法。
- 前記窒化膜はシリコン窒化膜である請求項1〜請求項3のいずれか1項に記載の半導体製造方法。
- シリコン酸化膜またはポリシリコン膜からなる基板上に形成されたシリコン窒化膜を選択的にエッチングする半導体製造方法において、
第1ソースガスからプラズマを発生させ、発生されたプラズマで基板に対してエッチング工程を遂行し、前記第1ソースガスはジフルオロメタンCH2F2、窒素N2、及び酸素O2を含むガス(CF4を含むものを除く)であり、前記ジフルオロメタンCH2F2の供給量は10〜500SCCMであり、前記窒素の供給量は100〜500SCCMであり、前記酸素の供給量は1500〜2500SCCMである半導体製造方法。 - エッチング工程を行う際、前記ジフルオロメタンは前記シリコン酸化膜又は前記ポリシリコン膜の上にポリマー膜を形成し、前記窒素と前記酸素は前記ポリマー膜を除去することによって前記シリコン酸化膜又は前記ポリシリコン膜に対する前記シリコン窒化膜のエッチング選択比を増加させる請求項7に記載の半導体製造方法。
- 工程を行う際、前記基板が置かれるサセプタの温度は0〜70℃であり、前記工程チャンバー内の圧力は300〜1000mTorrである請求項8に記載の半導体製造方法。
- 工程を行う際、前記プラズマを発生させるために供給される電力が1000〜3000Wである請求項9に記載の半導体製造方法。
- 前記ポリシリコン膜に対する前記シリコン窒化膜のエッチング選択比の向上が前記サセプタの温度を低くすることによって成される請求項8に記載の半導体製造方法。
- 前記シリコン酸化膜に対する前記シリコン窒化膜のエッチング選択比の向上が前記ジフルオロメタンと前記酸素の供給量を増加させることによって成される請求項8に記載の半導体製造方法。
- 前記プラズマは、前記基板が位置する工程チャンバーの外部で発生した後に前記工程チャンバーへ供給される請求項7〜請求項12のいずれか1項に記載の半導体製造方法。
- 前記プラズマが前記工程チャンバーへ供給される通路へ第2ソースガスを供給し、前記第2ソースガスが三フッ化窒素NF3を含む請求項13に記載の半導体製造方法。
- エッチング工程が行われる工程ユニットと、
前記工程ユニットの外部に提供され、前記工程ユニットへプラズマを供給するプラズマ供給ユニットと、を含み、
前記工程ユニットが、
工程チャンバーと、
前記工程チャンバー内に位置し、シリコン酸化膜またはポリシリコン膜からなる基板を支持し、加熱部材を有するサセプタと、を含み、
前記プラズマ供給ユニットが、
前記工程ユニットの外部に提供され、内部に放電空間を有するプラズマチャンバーと、
前記放電空間へ第1ソースガスを供給する第1ソースガス供給部と、
前記放電空間で第1ソースガスからプラズマが発生するように電力を提供する電力印加部と、
前記放電空間で発生したプラズマが前記工程チャンバーへ供給される通路へ提供される流入ダクトと、を含む半導体製造装置を用い、
前記放電空間へ前記第1ソースガスとして、ジフルオロメタンCH2F2、窒素N2、及び酸素O2を含むガス(CF4を含むものを除く)を、前記ジフルオロメタンCH2F2については10〜500SCCMの供給量で、前記窒素については100〜500SCCMの供給量で、前記酸素については1500〜2500SCCMの範囲の供給量で供給する段階と、
前記放電空間で前記第1ソースガスからプラズマを発生させる段階と、
前記放電空間で発生された前記プラズマを前記工程チャンバーへ供給する段階と、
前記プラズマによって前記基板の上の窒化膜をエッチングする段階と、を含む半導体製造方法。 - 前記プラズマチャンバーが前記工程チャンバーの上部で前記工程チャンバーに結合される請求項15に記載の半導体製造方法。
- 前記工程ユニットが、
前記サセプタの上部に位置され、上下方向に多数のホールが形成されたバッフルを含む請求項15に記載の半導体製造方法。 - 前記プラズマ供給ユニットが、前記放電空間で発生した前記プラズマが前記工程チャンバーへ流れる通路へ第2ソースガスを供給する第2ソースガス供給部をさらに含み、
前記第2ソースガスが三フッ化窒素NF3を含む請求項15に記載の半導体製造方法。 - 前記サセプタの温度は0〜70℃であり、前記工程チャンバー内の圧力は300〜1000mTorrである請求項15に記載の半導体製造方法。
- 工程を行う際、前記電力は1000〜3000Wである請求項19に記載の半導体製造方法。
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US9911620B2 (en) * | 2015-02-23 | 2018-03-06 | Lam Research Corporation | Method for achieving ultra-high selectivity while etching silicon nitride |
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