JP4051063B2 - 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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- JP4051063B2 JP4051063B2 JP2004569357A JP2004569357A JP4051063B2 JP 4051063 B2 JP4051063 B2 JP 4051063B2 JP 2004569357 A JP2004569357 A JP 2004569357A JP 2004569357 A JP2004569357 A JP 2004569357A JP 4051063 B2 JP4051063 B2 JP 4051063B2
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- film
- silicon substrate
- dielectric constant
- semiconductor device
- insulating film
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 37
- 229910052710 silicon Inorganic materials 0.000 claims description 37
- 239000010703 silicon Substances 0.000 claims description 37
- 239000007789 gas Substances 0.000 claims description 31
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 23
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 18
- 238000002230 thermal chemical vapour deposition Methods 0.000 claims description 17
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- 229910003855 HfAlO Inorganic materials 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
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- 229910052735 hafnium Inorganic materials 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 5
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- 238000010438 heat treatment Methods 0.000 claims description 4
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- 150000002902 organometallic compounds Chemical class 0.000 claims 4
- 150000001875 compounds Chemical class 0.000 claims 2
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910000449 hafnium oxide Inorganic materials 0.000 description 4
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 4
- 150000002736 metal compounds Chemical class 0.000 description 4
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- 125000002524 organometallic group Chemical group 0.000 description 2
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000588731 Hafnia Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- RTAKQLTYPVIOBZ-UHFFFAOYSA-N tritert-butylalumane Chemical compound CC(C)(C)[Al](C(C)(C)C)C(C)(C)C RTAKQLTYPVIOBZ-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- H01L21/02142—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 silicon and at least one metal element, e.g. metal silicate based insulators or metal silicon oxynitrides
- H01L21/02148—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 silicon and at least one metal element, e.g. metal silicate based insulators or metal silicon oxynitrides the material containing hafnium, e.g. HfSiOx or HfSiON
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- H01L21/02107—Forming insulating materials on a substrate
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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
- H01L21/0228—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 deposition by cyclic CVD, e.g. ALD, ALE, pulsed CVD
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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
- H01L21/314—Inorganic layers
- H01L21/3141—Deposition using atomic layer deposition techniques [ALD]
- H01L21/3142—Deposition using atomic layer deposition techniques [ALD] of nano-laminates, e.g. alternating layers of Al203-Hf02
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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
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- H01L21/316—Inorganic layers composed of oxides or glassy oxides or oxide based glass
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- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
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- H01L29/49—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET
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Description
FIG.1Cに示すように、HF:H2O=1:20の希HF水溶液にシリコン基板1を約1分間浸し、シリコン基板表面の自然酸化膜2を除去した。
FIG.1Eに示すように、シリコン基板をSC2洗浄(HCl:H2O2:H2O=1:1:5)し、シリコン表面にSC2によるケミカルオキサイド膜3を形成した。自然酸化膜2より清浄な酸化シリコン膜3が形成される。
厚さ3nmのHf0.8Al0.2O膜を形成してキャパシタンス等価酸化シリコン膜厚(CET)約1.6nmを得た。フラットバンド電圧のずれΔVfbは、0.390Vであった。第1の成長方法よりΔVfbは小さくなった。固定電荷が減少したと考えられる。
成膜ガス中に20vol%の水素を加入する場合を説明したが、水素の流量は20vol%に限らない。水素は、1−30%の範囲から選択できよう。
HfAlOを熱CVDする場合を説明したが、他の高誘電率絶縁膜を熱CVDで成長する場合にも、水素ガスを用いることにより、フラットバンド電圧の変化を抑制することが可能であろう。原料ガスは、有機金属に限らないが、特に有機金属原料を用いた場合、可能性が高いであろう。
Claims (7)
- (a)反応室内でシリコン基板を加熱する工程と、
(b)前記加熱したシリコン基板上に酸化シリコンより高い比誘電率を有する、HfAlO膜である高誘電率絶縁膜を熱CVDで堆積する工程であって、Hfの有機金属化合物とAlの有機金属化合物をキャリアガス中に含む原料ガスと水素ガスとを含む成膜ガスを前記シリコン基板の表面に供給する工程と、
を含む半導体装置の製造方法。 - (a)反応室内でシリコン基板を加熱する工程と、
(b)前記加熱したシリコン基板上に窒化シリコンより高い比誘電率を有する、HfAlO膜である高誘電率絶縁膜を熱CVDで堆積する工程であって、Hfの有機金属化合物とAlの有機金属化合物をキャリアガス中に含む原料ガスと水素ガスとを含む成膜ガスを前記シリコン基板の表面に供給する工程と、
を含む半導体装置の製造方法。 - Hfの有機金属化合物は、Hf(OtC4H9)4、Hf{N(CH3)2}4、Hf{N(C2H5)2}4、Hf{N(CH3)(C2H5)}4の少なくとも1種、Alの有機金属化合物は、Al(tC4H9)3、Al(C2H5)3、Al(CH3)3の少なくとも1種である請求項1または2記載の半導体装置の製造方法。
- 前記工程(a)の前に、(x)シリコン基板表面にケミカルオキサイド層を形成する工程を含む請求項1又は2記載の半導体装置の製造方法。
- 前記シリコン基板が表面に約1nm以下の厚さの酸化シリコン膜を有し、前記成膜ガスが酸素ガスを含まない請求項1記載の半導体装置の製造方法。
- 前記工程(a)が、シリコン基板を400℃〜600℃の温度に加熱する請求項1または2記載の半導体装置の製造方法。
- 前記工程(b)が、10Pa〜100Paの圧力下で熱CVDを行なう請求項1または2記載の半導体装置の製造方法。
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US6060755A (en) * | 1999-07-19 | 2000-05-09 | Sharp Laboratories Of America, Inc. | Aluminum-doped zirconium dielectric film transistor structure and deposition method for same |
JP2001274378A (ja) | 2000-03-28 | 2001-10-05 | Mitsubishi Electric Corp | 半導体装置 |
KR100368311B1 (ko) | 2000-06-27 | 2003-01-24 | 주식회사 하이닉스반도체 | 반도체 소자의 게이트 형성 방법 |
JP2002057155A (ja) * | 2000-08-08 | 2002-02-22 | Fujitsu Ltd | 5酸化タンタル膜の製造方法 |
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US6486080B2 (en) | 2000-11-30 | 2002-11-26 | Chartered Semiconductor Manufacturing Ltd. | Method to form zirconium oxide and hafnium oxide for high dielectric constant materials |
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