JP4015976B2 - 電子装置の製造方法 - Google Patents
電子装置の製造方法 Download PDFInfo
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- JP4015976B2 JP4015976B2 JP2003305063A JP2003305063A JP4015976B2 JP 4015976 B2 JP4015976 B2 JP 4015976B2 JP 2003305063 A JP2003305063 A JP 2003305063A JP 2003305063 A JP2003305063 A JP 2003305063A JP 4015976 B2 JP4015976 B2 JP 4015976B2
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- 238000004519 manufacturing process Methods 0.000 title claims description 21
- 239000000758 substrate Substances 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 27
- 238000005268 plasma chemical vapour deposition Methods 0.000 claims description 22
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 18
- 229920006254 polymer film Polymers 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- -1 polyxylylene Polymers 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 13
- 230000005661 hydrophobic surface Effects 0.000 claims description 8
- 239000004065 semiconductor Substances 0.000 claims description 8
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 7
- 150000003377 silicon compounds Chemical class 0.000 claims description 6
- 239000010408 film Substances 0.000 description 143
- 239000007789 gas Substances 0.000 description 27
- 239000010410 layer Substances 0.000 description 16
- 239000002994 raw material Substances 0.000 description 10
- 239000010409 thin film Substances 0.000 description 10
- 239000002243 precursor Substances 0.000 description 9
- 238000009832 plasma treatment Methods 0.000 description 8
- 230000002209 hydrophobic effect Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- PQDJYEQOELDLCP-UHFFFAOYSA-N trimethylsilane Chemical compound C[SiH](C)C PQDJYEQOELDLCP-UHFFFAOYSA-N 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 230000007547 defect Effects 0.000 description 6
- 239000011229 interlayer Substances 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 238000000151 deposition Methods 0.000 description 4
- 230000008021 deposition Effects 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000002344 surface layer Substances 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- CZDYPVPMEAXLPK-UHFFFAOYSA-N tetramethylsilane Chemical compound C[Si](C)(C)C CZDYPVPMEAXLPK-UHFFFAOYSA-N 0.000 description 3
- 125000006839 xylylene group Chemical group 0.000 description 3
- KVNYFPKFSJIPBJ-UHFFFAOYSA-N 1,2-diethylbenzene Chemical compound CCC1=CC=CC=C1CC KVNYFPKFSJIPBJ-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910004541 SiN Inorganic materials 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 125000001153 fluoro group Chemical group F* 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229910000077 silane Inorganic materials 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- UBHZUDXTHNMNLD-UHFFFAOYSA-N dimethylsilane Chemical compound C[SiH2]C UBHZUDXTHNMNLD-UHFFFAOYSA-N 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 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
- 239000011261 inert gas Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910003465 moissanite Inorganic materials 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
- 150000002894 organic compounds Chemical class 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 239000012044 organic layer Substances 0.000 description 1
- 150000001282 organosilanes Chemical class 0.000 description 1
- 150000003961 organosilicon compounds Chemical class 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- VCZQFJFZMMALHB-UHFFFAOYSA-N tetraethylsilane Chemical compound CC[Si](CC)(CC)CC VCZQFJFZMMALHB-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
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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
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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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—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
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- H01L21/02263—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase
- H01L21/02271—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a deposition process deposition from the gas or vapour phase deposition by decomposition or reaction of gaseous or vapour phase compounds, i.e. chemical vapour deposition
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- H01L21/02296—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer
- H01L21/02299—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer pre-treatment
- H01L21/02304—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer pre-treatment formation of intermediate layers, e.g. buffer layers, layers to improve adhesion, lattice match or diffusion barriers
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- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
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- H01L21/312—Organic layers, e.g. photoresist
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- 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
- H01L21/76822—Modification of the material of dielectric layers, e.g. grading, after-treatment to improve the stability of the layers, to increase their density etc.
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- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—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
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Description
前記プラズマ処理された表面に弗素化芳香族炭化水素重合膜を形成する工程とを少なくとも備えたことを特徴とする電子装置の製造方法である。
次いで、引き続き前記プラズマCVD処理装置内において、前記無機膜表面を有機シリコン系化合物含有雰囲気下でプラズマ処理して、水との接触角が50°以上の疎水性表面を形成する工程と、
前記プラズマ処理された表面に弗素化芳香族炭化水素重合膜を形成する工程とを少なくとも備えたことを特徴とする電子装置の製造方法。
以下、本発明の半導体製造方法の実施の形態について、そのプロセスを示す図1を用いて説明する。
前記表面層12の疎水性の程度としては、該表面と水との接触角が50°以上となる程度が望ましく、更に好ましくは60°以上である。この表面層12の水との接触角が50°未満の場合、後述する工程によってその表面に形成する有機低誘電率膜との密着性が悪く、これを用いた電子装置の製造工程中において、前記有機低誘電率膜の剥離が生じて歩留まりが低下する。無機膜と水との接触角を測定するには、無機膜を水平面に配置し、清浄にした無機膜表面に純水を滴下し、無機膜と水滴とが接する部分における無機膜と水とのなす角度を測定する。
無機膜と水との接触角を、上記範囲に制御するには、使用する有機シリコン系化合物を選択すること、およびプラズマ処理時間を制御して成膜厚みを制御することなどによって、上記範囲とすることができる。
具体的には、非極性の有機基を有する有機シリコン系化合物を採用し、プラズマ処理時間を5秒以上の時間行うことによって、上記範囲の接触角を有する疎水性膜を形成することができる。
ヒータ温度: 250〜400℃
不活性ガス流量: 0〜2000sccm
チャンバー内圧力: 100〜500Pa
高周波出力: 200〜1500W
処理時間: 3〜10秒
本実施の形態において用いることのできる有機低誘電率層材料としては、誘電率が特に低いことから弗素化芳香族炭化水素重合膜が好ましい。この弗素化芳香族炭化水素重合膜としては、弗素化ポリジアルキルベンゼン、弗素化ポリフルオロジアルキルベンゼンなどの重合膜が好ましい。更に具体的には、弗素化ポリキシリレン−[CF2−C6H4−CF2]n−、弗素化ポリフルオロキシリレン−[CF2−C6F4−CF2]n−、弗素化ポリジエチルベンゼン、弗素化ポリフルオロジエチルベンゼン、弗素化ポリメチルエチルベンゼン、弗素化ポリフルオロメチルエチルベンゼンなどが挙げられる。
上記第1の実施の形態においては、下層無機膜を備えた出発基板を用い、その表面を疎水性化して、下層無機膜と有機低誘電率膜の密着性を改善する方法を示したが、第2の実施の形態は、前記下層無機膜をプラズマCVD法によって形成し、引き続いてその表面に有機シラン化合物の雰囲気中でプラズマCVD処理を継続して表面を疎水性化することにより、同じプラズマCVD装置を用いて一貫して処理が可能な方法である。以下、このプロセスの概略断面図である図3を用いて説明する。
具体的には、トリメチルシランとアンモニアとの混合ガス中で、プラズマ処理することにより、SiCN膜を形成することができるが、SiCN膜を形成後、引き続くトリメチルシランのみのプラズマ処理によって、基板上に疎水性の層を形成することが可能となる(図3(b))。
まず、基板31上に、SiOC膜をプラズマCVD法により形成して、下層無機膜32とした(図3(b))。
次いで、SiOC形成工程と同じプラズマCVD装置を用い、有機シランとしてテトラメチルシランを含むガスを用いて、下記条件によりプラズマ処理し、上記SiOC膜表面に、2nm程度の厚さのメチル基からなる有機基を残した状態の層を薄く形成した。
成膜条件は、下記の条件の通りとした。
成膜チャンバー内圧力: 233Pa(1.75Torr)
温度: 400℃
原料ガス: テトラメチルシラン
原料ガス流量: 2500sccm
高周波電源周波数: 13.56MHz
パワー: 100〜800W
この方法によって形成したSiOC膜の表面の水との接触角を測定した。
すなわち、図2に示すプラズマCVD装置を用い、原料収納容器21aより、加熱・気化させた原料ガスを流量制御機構32aによって流量を制御しながら内壁温度が600℃の加熱反応機構33により活性化し、重合反応により薄膜を形成するための前駆体を形成した。成膜チャンバー34内に配置された、30℃に制御された静電チャック上に載置された基板上に前駆体を導き、下記プラズマ処理条件にて有機物薄膜として弗素化ポリキシリレン−[CF2−C6H4−CF2]n−を形成した(図3(e))。
前駆体流量: 5sccm
成膜圧力: 2.7Pa(20mTorr)
図2のプラズマCVD装置を用い、成膜チャンバー34内に、シリコンウェハ基板を配置した。原料ガスとして、トリメチルシランとアンモニアを用いて、シリコン基板の表面に、プラズマCVDによりSiCN膜を成膜した。プラズマCVD工程の最終過程で、アンモニアの供給を停止し、トリメチルシランと窒素ガスのみを供給し、高周波出力を急峻に0Wとするのではなく、100〜500W/secで徐々に小さくすることによって、トリメチルシランの分解を抑制してメチル基を有する表面を形成した。
その結果、概ね接触角を50°以上の条件にて膜剥がれ不良率がゼロとなった。
12… 疎水性化表面
13… 有機低誘電率膜
21… 原料収納容器
22… 流量制御装置
23… 加熱反応機構
24… 成膜チャンバー
25… 高周波電源
26… 圧力制御装置
27… 排気装置
31… 基板
32… 無機下層膜
33… 疎水性化表面
34… 有機低誘電率膜
Claims (6)
- 無機膜の表面を有機シリコン系化合物含有雰囲気下でプラズマ処理して、水との接触角が50°以上の疎水性表面を形成する工程と、
前記プラズマ処理された表面に弗素化芳香族炭化水素重合膜を形成する工程とを少なくとも備えたことを特徴とする電子装置の製造方法。 - 前記プラズマ処理された表面の水との接触角が、60°以上であることを特徴とする請求項1記載の電子装置の製造方法。
- 前記無機膜が、SiO2膜、SiN膜、SiC膜、SiOC膜、及びSiCN膜よりなる群から選ばれたいずれか1種の膜である請求項1または請求項2に記載の半導体装置の製造方法。
- 前記弗素化芳香族炭化水素重合膜が、弗素化ポリキシリレンまたは弗素化ポリフルオロキシリレンであることを特徴とする請求項1ないし請求項3のいずれかに記載の電子装置の製造方法。
- 基板表面にプラズマCVD処理装置を用いて無機膜を形成する工程と、
次いで、引き続き前記プラズマCVD処理装置内において、前記無機膜表面を有機シリコン系化合物含有雰囲気下でプラズマ処理して、水との接触角が50°以上の疎水性表面を形成する工程と、
前記プラズマ処理された表面に弗素化芳香族炭化水素重合膜を形成する工程とを少なくとも備えたことを特徴とする電子装置の製造方法。 - 前記無機膜が、SiCN膜であることを特徴とする請求項5に記載の電子装置の製造方法。
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JP2003305063A JP4015976B2 (ja) | 2003-08-28 | 2003-08-28 | 電子装置の製造方法 |
KR1020040067856A KR20050021895A (ko) | 2003-08-28 | 2004-08-27 | 전자장치의 제조방법 |
US10/927,123 US7084077B2 (en) | 2003-08-28 | 2004-08-27 | Method of fabricating multilayer interconnect wiring structure having low dielectric constant insulator film with enhanced adhesivity |
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US20060199386A1 (en) * | 2004-12-27 | 2006-09-07 | Jim-Jey Huang | Semiconductor device with low-resistance inlaid copper/barrier interconnects and method for manufacturing the same |
US7875556B2 (en) | 2005-05-16 | 2011-01-25 | Air Products And Chemicals, Inc. | Precursors for CVD silicon carbo-nitride and silicon nitride films |
US7601567B2 (en) * | 2005-12-13 | 2009-10-13 | Samsung Mobile Display Co., Ltd. | Method of preparing organic thin film transistor, organic thin film transistor, and organic light-emitting display device including the organic thin film transistor |
KR100939593B1 (ko) * | 2006-11-21 | 2010-02-01 | 어플라이드 머티어리얼스, 인코포레이티드 | 습식 에칭 언더컷팅들을 최소화하고 k가 2.5 미만인 최저k 유전체들의 공극 밀봉을 제공하는 방법 |
JP5257281B2 (ja) * | 2009-07-14 | 2013-08-07 | 富士通株式会社 | 半導体装置及びその製造方法 |
KR102616489B1 (ko) | 2016-10-11 | 2023-12-20 | 삼성전자주식회사 | 반도체 장치 제조 방법 |
CN111755674B (zh) * | 2020-06-18 | 2022-07-05 | 合肥国轩高科动力能源有限公司 | 一种碳包覆氧化亚硅/g-C3N4复合材料及其制备方法、应用 |
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