JP2009530871A - 誘電性バリア層を高い選択性でエッチングする方法 - Google Patents
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- 230000004888 barrier function Effects 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000005530 etching Methods 0.000 title claims abstract description 41
- 239000000203 mixture Substances 0.000 claims abstract description 29
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 24
- 239000000758 substrate Substances 0.000 claims abstract description 24
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011737 fluorine Substances 0.000 claims abstract description 19
- 239000007789 gas Substances 0.000 claims description 89
- 230000008569 process Effects 0.000 claims description 19
- 238000012545 processing Methods 0.000 claims description 15
- 229910052799 carbon Inorganic materials 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 5
- 229910052734 helium Inorganic materials 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 8
- 239000011810 insulating material Substances 0.000 description 7
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- 229910010271 silicon carbide Inorganic materials 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 229940104869 fluorosilicate Drugs 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- 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
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- 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
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- 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
- H01L21/31127—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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- 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
- H01L21/76802—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
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Abstract
Description
本発明は、概して、半導体加工技術、より具体的には半導体処理において誘電性バリア層を誘電性バルク絶縁層に対して高い選択性でもってエッチングするための方法に関する。
(関連技術の説明)
Claims (23)
- 配線構造において誘電性バリア層をエッチングするための方法であり、
誘電性バルク絶縁層を介してその一部が露出している誘電性バリア層を有する基板をリアクタ内に配置し、
少なくともH2ガスを含有するガス混合物をリアクタ内に流し、
誘電性バリア層の露出部位を誘電性バルク絶縁層に対して選択的にエッチングすることを含む方法。 - ガス混合物を流す工程が、フッ素含有ガスをH2ガスと共にリアクタ内に流すことを更に含む請求項1記載の方法。
- ガス混合物を流す工程が、少なくとも1つのインサートガスをリアクタ内に流すことを更に含む請求項1記載の方法。
- ガス混合物を流す工程が、H2を流量5sccmから約100sccmで流すことを更に含む請求項1記載の方法。
- エッチング工程が、
処理圧力を約10mTorrから約200mTorrに維持し、
基板温度を約0℃から約50℃に制御し、
約100ワットから約800ワットのプラズマ電力を印加することを更に含む請求項1記載の方法。 - フッ素含有ガスを流す工程が、フッ素含有ガスを流量約0sccmから約80sccmで流すことを更に含む請求項2記載の方法。
- フッ素含有ガスがCH2F2、CHF3、CH3F、C2F6、CF4及びC3F8から成る群から選択される請求項2記載の方法。
- インサートガスを流す工程が、インサートガスを流量50sccmから約500sccmで流すことを更に含む請求項3記載の方法。
- インサートガスがAr、O2、CO、NO、N2O、He及びN2から成る群から選択される請求項3記載の方法。
- 誘電性バリア層が5.5未満の誘電率を有しており、誘電性絶縁層が4未満の誘電率を有している請求項1記載の方法。
- 誘電性層が炭素含有ケイ素膜である請求項1記載の方法。
- 露出した誘電性バリア層を除去し、
誘電性バリア層の下に配置された、基板上の下層である導電層を露出させることを更に含む請求項1記載の方法。 - 配線構造において誘電性バリア層をエッチングするための方法であり、
誘電性バルク絶縁層を介してその一部が露出している誘電性バリア層を有する基板をリアクタ内に配置し、
H2ガス及びフッ素含有ガスを含有するガス混合物をリアクタ内に流し、
誘電性バリア層の露出部位をガス混合物から生成されたプラズマの存在下でエッチングすることを含む方法。 - ガス混合物を流す工程が、
水素ガス(H2)を流量5sccmから約100sccmで流し、
フッ素含有ガスを流量約0sccmから約80sccmで流すことを更に含む、請求項13記載の方法。 - ガス混合物を流す工程が、少なくとも1つのインサートガスをリアクタ内に流すことを更に含み、インサートガスが流量約50sccmから約500sccmで流される請求項13記載の方法。
- フッ素含有ガスがCH2F2、CHF3、CH3F、C2F6、CF4及びC3F8から成る群から選択される請求項13記載の方法。
- インサートガスがAr、O2、CO、NO、N2O、He及びN2から成る群から選択される請求項15記載の方法。
- ガス混合物を流す工程が、
処理圧力を約10mTorrから約200mTorrに維持し、
基板温度を約0℃から約50℃に制御し、
約100ワットから約800ワットのプラズマを印加することを更に含む請求項13記載の方法。 - 誘電性バリア層が5.5未満の誘電率を有している請求項13記載の方法。
- 誘電性バリア層が炭素含有ケイ素膜である請求項13記載の方法。
- 配線構造において誘電性バリア層をエッチングするための方法であり、
誘電性バルク絶縁層を介してその一部が露出している誘電性バリア層を有する基板をリアクタ内に配置することを含み、誘電性バリア層が炭素含有ケイ素膜であり、
H2ガス、フッ素含有ガス及び少なくとも1つのインサートガスを含有するガス混合物をリアクタ内に流し、
誘電性層の露出部位を誘電性バルク絶縁層に対して選択的にエッチングすることを含む方法。 - ガス混合物を流す工程が、
H2ガスを流量約5sccmから約100sccmで流し、
フッ素含有ガスを流量約0sccmから約80sccmで流すことを含み、フッ素含有ガスがCH2F2、CHF3、CH3F、C2F6、CF4及びC3F8から成る群から選択され、
インサートガスを流量約50sccmから500sccmで流すことを含み、インサートガスがAr、O2、CO、NO、N2O、He及びN2から成る群から選択される請求項21記載の方法。 - ガス混合物を流す工程が、
処理圧力を約10mTorrから約200mTorrに維持し、
基板温度を約0℃から約50℃に制御し、
約100ワットから約800ワットのプラズマ力を印加することを更に含む請求項21記載の方法。
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US11/388,246 US7977245B2 (en) | 2006-03-22 | 2006-03-22 | Methods for etching a dielectric barrier layer with high selectivity |
PCT/US2007/064141 WO2007109522A2 (en) | 2006-03-22 | 2007-03-16 | Methods for etching a dielectric barrier layer with high selectivity |
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JP2015529405A (ja) * | 2012-09-20 | 2015-10-05 | アプライド マテリアルズ インコーポレイテッドApplied Materials,Incorporated | 炭窒化ケイ素の選択的エッチング |
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KR101083211B1 (ko) | 2011-11-11 |
US20070224807A1 (en) | 2007-09-27 |
EP2008298A2 (en) | 2008-12-31 |
CN101405844A (zh) | 2009-04-08 |
US20070224803A1 (en) | 2007-09-27 |
WO2007109522A2 (en) | 2007-09-27 |
US7977245B2 (en) | 2011-07-12 |
WO2007109522A3 (en) | 2008-03-20 |
KR20080106290A (ko) | 2008-12-04 |
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