JP5233975B2 - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- JP5233975B2 JP5233975B2 JP2009277902A JP2009277902A JP5233975B2 JP 5233975 B2 JP5233975 B2 JP 5233975B2 JP 2009277902 A JP2009277902 A JP 2009277902A JP 2009277902 A JP2009277902 A JP 2009277902A JP 5233975 B2 JP5233975 B2 JP 5233975B2
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- 239000004065 semiconductor Substances 0.000 title claims description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000010408 film Substances 0.000 claims description 422
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 168
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 168
- 239000007789 gas Substances 0.000 claims description 151
- 229910052799 carbon Inorganic materials 0.000 claims description 106
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 105
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 73
- 238000000034 method Methods 0.000 claims description 44
- 229910052757 nitrogen Inorganic materials 0.000 claims description 29
- PQDJYEQOELDLCP-UHFFFAOYSA-N trimethylsilane Chemical compound C[SiH](C)C PQDJYEQOELDLCP-UHFFFAOYSA-N 0.000 claims description 29
- 239000010409 thin film Substances 0.000 claims description 20
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 11
- 229910001882 dioxygen Inorganic materials 0.000 claims description 11
- 230000001681 protective effect Effects 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 230000003213 activating effect Effects 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000012545 processing Methods 0.000 description 40
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 39
- 230000008569 process Effects 0.000 description 24
- 235000012431 wafers Nutrition 0.000 description 24
- 239000011229 interlayer Substances 0.000 description 22
- 239000010410 layer Substances 0.000 description 20
- 230000015572 biosynthetic process Effects 0.000 description 18
- 239000001301 oxygen Substances 0.000 description 18
- 229910052760 oxygen Inorganic materials 0.000 description 18
- 235000012239 silicon dioxide Nutrition 0.000 description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 15
- 229910052681 coesite Inorganic materials 0.000 description 15
- 239000010949 copper Substances 0.000 description 15
- 229910052802 copper Inorganic materials 0.000 description 15
- 229910052906 cristobalite Inorganic materials 0.000 description 15
- 229910001873 dinitrogen Inorganic materials 0.000 description 15
- 239000000377 silicon dioxide Substances 0.000 description 15
- 229910052682 stishovite Inorganic materials 0.000 description 15
- 229910052905 tridymite Inorganic materials 0.000 description 15
- 229910052814 silicon oxide Inorganic materials 0.000 description 13
- 229910052581 Si3N4 Inorganic materials 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 10
- 238000005530 etching Methods 0.000 description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000012528 membrane Substances 0.000 description 5
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 238000007872 degassing Methods 0.000 description 4
- 238000002845 discoloration Methods 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 238000005498 polishing Methods 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 238000004380 ashing Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 150000002894 organic compounds Chemical class 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229910020175 SiOH Inorganic materials 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 150000004820 halides Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 150000002500 ions Chemical group 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 2
- -1 silicon organic compound Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- 229910004014 SiF4 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- PRPAGESBURMWTI-UHFFFAOYSA-N [C].[F] Chemical compound [C].[F] PRPAGESBURMWTI-UHFFFAOYSA-N 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052743 krypton Inorganic materials 0.000 description 1
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- QLOAVXSYZAJECW-UHFFFAOYSA-N methane;molecular fluorine Chemical compound C.FF QLOAVXSYZAJECW-UHFFFAOYSA-N 0.000 description 1
- UIUXUFNYAYAMOE-UHFFFAOYSA-N methylsilane Chemical compound [SiH3]C UIUXUFNYAYAMOE-UHFFFAOYSA-N 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000678 plasma activation Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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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
- H01L21/76801—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
- H01L21/76835—Combinations of two or more different dielectric layers having a low dielectric constant
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- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
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- H01L21/02118—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer carbon based polymeric organic or inorganic material, e.g. polyimides, poly cyclobutene or PVC
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- H01L21/02126—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material containing Si, O, and at least one of H, N, C, F, or other non-metal elements, e.g. SiOC, SiOC:H or SiONC
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- H01L21/02167—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon carbide not containing oxygen, e.g. SiC, SiC:H or silicon carbonitrides
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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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- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31144—Etching the insulating layers by chemical or physical means using masks
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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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- H01L21/18—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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- H01L21/18—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
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- H01L21/314—Inorganic layers
- H01L21/316—Inorganic layers composed of oxides or glassy oxides or oxide based glass
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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
- H01L21/76802—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 by forming openings in dielectrics
- H01L21/76807—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 by forming openings in dielectrics for dual damascene structures
- H01L21/76811—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 by forming openings in dielectrics for dual damascene structures involving multiple stacked pre-patterned masks
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- H01L21/76829—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 characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers
- H01L21/76832—Multiple layers
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Description
この第1の絶縁膜の上に、窒素添加炭化ケイ素膜からなる第1の保護膜を成膜する工程と、
この第1の保護膜の上にフッ素添加カーボン膜からなる第2の絶縁膜を成膜する工程と、
前記第2の絶縁膜の表面をシリコン及び炭素の活性種を含むプラズマに曝す工程と、
次いで基板の表面をシリコン及び炭素の活性種に加えて窒素の活性種を更に含むプラズマに曝して窒素添加炭化ケイ素膜からなるハードマスク用の薄膜を成膜する工程と、
この薄膜の上に更にハードマスク用の薄膜を成膜する工程と、
これら工程で成膜されたハードマスクを用いて、前記第1の絶縁膜に電極埋め込み用のホールを形成し、次いで前記第2の絶縁膜に配線埋め込み用の溝を形成する工程と、
を含むことを特徴とする。
SiOX膜の成膜温度が400℃以下の場合、膜中に微量ながらSiOH構造が形成されるのは避けがたい。SiOH構造は、その後工程において400℃以上のアニール工程(例えばシンタ等)が行われた場合にOH基が切れ、その一部がフッ素添加カーボン膜との界面に移動する。するとフッ素添加カーボン膜のFとOH基とが反応してHFが生成され、さらにHFとSiOX膜とが反応してSiF4が生成され、ひいてはフッ素カーボン膜とSiOX膜との密着性が低下し、これら膜間の膜剥れが発生する。
この問題を解決するためには、第1の実施の形態におけるSiCO膜94、第3の実施の形態におけるSiO2膜44、SiCO膜41のようなSiOX膜と、フッ素添加カーボン膜との間に本願による極薄のSiCN膜を挟んでおけば良い。なおここで言うSiCN膜とは、第1の実施の形態で述べたようにSiC膜92及びSiCN膜93の積層構造も含むものである。SiCN膜はフッ素添加カーボン膜に比べるとその比誘電率は4.5と高い値を持つが、このように極薄化することでトータルとしての比誘電率の上昇を抑えることが出来る。例えばフッ素添加カーボン膜の膜厚が100nm、この上下に各々5nmのSiCN膜が形成された絶縁膜の比誘電率は2.3であり、フッ素添加カーボン膜単体の比誘電率2.2に対し、その上昇分は僅かであり、十分低誘電率膜(Low−k膜)として機能し得る。ここで極薄とは、酸素、窒素、水分等によるアタックを防ぎつつ、トータルとしての比誘電率の上昇を押さえるという意味で、その厚みは3〜10nmであり、より好ましくは5〜8nmである。さらに極薄絶縁膜としてはSiCNに代えて、SiC(シリコンカーバイト)、SiN(シリコンナイトライド)、アモルファスカーボン等を挙げることができる。
(実施例1)
この実施例1は、第2の実施の形態に対応するものである。図1に示したプラズマ処理装置を用い、シリコンベアウエハの上にフッ素添加カーボン膜を120nmの膜厚で成膜した。成膜条件については、マイクロ波のパワーを3000W、プロセス圧力を10.6Pa(80mTorr)、ウエハの温度を380℃、C5F8ガス及びArガスの流量を夫々200sccm及び100sccmに設定した。
(実施例2)
この実施例2は、第1の実施の形態に対応するものである。実施例1と同様にしてシリコンベアウエハの上にフッ素添加カーボン膜及びSiCN膜を順次成膜した。ただしこの例ではSiCN膜は保護層としての役目を果たすものであることから、その膜厚は5nmとしてある。次いでウエハをプラズマ処理装置内に載置したまま前記SiCN膜の上にSiCO膜を50nmの膜厚で成膜した。成膜条件については、マイクロ波のパワーを1500W、プロセス圧力を33.3Pa(250mTorr)、ウエハの温度を380℃に設定し、先ずトリメチルシランガス及びArガスを夫々40sccm及び200sccmの流量で5秒間供給し、その後トリメチルシランガス及びArガスをこの流量で供給したまま酸素ガスを10sccmの流量で供給した。
(実施例3)
SiCN膜を成膜するときに、成膜初期時にトリメチルシランガス(及びArガスを供給する工程を行わずに、最初からトリメチルシランガス、Arガス及び窒素ガスをこの流量で供給した他は、実施例2と同様にしてフッ素添加カーボン膜の上にSiCN膜及びSiCO膜をこの順に積層した。
(比較例1)
SiCN膜を成膜するときに、成膜初期時にトリメチルシランガス及びArガスを供給する工程を行わずに、最初からトリメチルシランガス、Arガス及び窒素ガスをこの流量で供給した他は、実施例1と同様にしてフッ素添加カーボン膜の上にSiCN膜を積層した。
(比較例2)
SiCN膜を成膜せずにフッ素添加カーボン膜の上に直接SiCO膜を成膜した他は実施例2と同様にして積層体を得た。
B.薄膜の密着性の考察
実施例1〜3及び比較例1、2のウエハを真空雰囲気で400℃に加熱して30〜60分放置した。これらウエハの表面を目視で観察し、またテープを貼り付けて膜剥がれの状態を調べたところ、比較例1は膜中から気泡が発生したことに基づく変色域(Blister)が多少見られ、また僅かに膜が剥がれた部位が発生した。これに対して実施例1については、比較例1のような変色域は全く見られず、またテープテストについても膜剥がれは全くなかった。従ってフッ素添加カーボン膜の上にSiCN膜を成膜する場合、成膜初期時には窒素ガスを供給せずにトリメチルシランガス及びArガスのみを供給することにより、フッ素添加カーボン膜に対するSiCN膜の密着性が大きくなることが理解される。
C.参考実験
実施例1の積層体について、SIMS(二次イオン質量分析装置)により深さ方向における炭素と窒素との濃度を二次イオン強度を指標として調べたところ、図9(a)に示す結果が得られた。一方実施例1において、トリメチルシランガス及びArガスを供給する前に窒素プラズマをフッ素添加カーボン膜に60秒照射して積層体を得、この積層体について同様に調べたところ、図9(b)に示す結果が得られた。図9(a)においてはSiCN膜とフッ素添加カーボン膜との界面に炭素と窒素との濃度が高くなっている部位(点線の円内)が見られ、フッ素添加カーボン膜内の窒素濃度が界面から急激に低くなっており、10分の1以下になっている。一方図9(b)においては前記界面にそのような部位は見られず、またフッ素添加カーボン膜内の窒素濃度がSiCN膜内の窒素濃度とほとんど変わらない。
10 制御部
11 同軸導波管
12 マイクロ波発生手段
2 載置台
3 第1のガス供給部(シャワーヘッド)
33 ガス供給路
36 開口部
4 第2のガス供給部(ガス供給路)
35、51、53、55 ガス供給機器群
6 誘電体
7 アンテナ部
71 平面アンテナ部材
74 スロット部
81、91 フッ素添加カーボン膜
93 SiCN膜
94 SiCO膜
95 SiO2膜
97 銅
Claims (3)
- 基板上に多孔質の酸素添加炭化ケイ素からなる第1の絶縁膜を成膜する工程と、
この第1の絶縁膜の上に、窒素添加炭化ケイ素膜からなる第1の保護膜を成膜する工程と、
この第1の保護膜の上にフッ素添加カーボン膜からなる第2の絶縁膜を成膜する工程と、
前記第2の絶縁膜の表面をシリコン及び炭素の活性種を含むプラズマに曝す工程と、
次いで基板の表面をシリコン及び炭素の活性種に加えて窒素の活性種を更に含むプラズマに曝して窒素添加炭化ケイ素膜からなるハードマスク用の薄膜を成膜する工程と、
この薄膜の上に更にハードマスク用の薄膜を成膜する工程と、
これら工程で成膜されたハードマスクを用いて、前記第1の絶縁膜に電極埋め込み用のホールを形成し、次いで前記第2の絶縁膜に配線埋め込み用の溝を形成する工程と、
を含むことを特徴とする半導体装置の製造方法。 - 前記第1の絶縁膜は、アルゴンガス及びトリメチルシランガスを活性化して得たプラズマに曝すことによりSiCH膜を成膜し、その後酸素ガスを活性化して得たプラズマに曝すことにより得られることを特徴とする請求項1記載の半導体装置の製造方法。
- 前記第1の保護膜の厚み、及び前記窒素添加炭化ケイ素膜からなるハードマスク用の薄膜の厚みは、各々3〜10nmであることを特徴とする請求項1または2記載の半導体装置の製造方法。
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JP2004079901A (ja) * | 2002-08-21 | 2004-03-11 | Nec Electronics Corp | 半導体装置及びその製造方法 |
US7199046B2 (en) * | 2003-11-14 | 2007-04-03 | Tokyo Electron Ltd. | Structure comprising tunable anti-reflective coating and method of forming thereof |
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US7803705B2 (en) | 2010-09-28 |
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WO2005069367A1 (ja) | 2005-07-28 |
KR20060127109A (ko) | 2006-12-11 |
US20080254641A1 (en) | 2008-10-16 |
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