KR100648252B1 - 텅스텐막 형성 방법 및 이를 이용하는 반도체 소자의 형성방법 - Google Patents
텅스텐막 형성 방법 및 이를 이용하는 반도체 소자의 형성방법 Download PDFInfo
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- KR100648252B1 KR100648252B1 KR1020040095863A KR20040095863A KR100648252B1 KR 100648252 B1 KR100648252 B1 KR 100648252B1 KR 1020040095863 A KR1020040095863 A KR 1020040095863A KR 20040095863 A KR20040095863 A KR 20040095863A KR 100648252 B1 KR100648252 B1 KR 100648252B1
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims abstract description 159
- 229910052721 tungsten Inorganic materials 0.000 title claims abstract description 159
- 239000010937 tungsten Substances 0.000 title claims abstract description 159
- 238000000034 method Methods 0.000 title claims abstract description 88
- 239000004065 semiconductor Substances 0.000 title claims abstract description 33
- 230000015572 biosynthetic process Effects 0.000 title description 4
- 239000010408 film Substances 0.000 claims abstract description 150
- 238000005229 chemical vapour deposition Methods 0.000 claims abstract description 20
- 238000000231 atomic layer deposition Methods 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 52
- 238000010926 purge Methods 0.000 claims description 23
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 20
- NXHILIPIEUBEPD-UHFFFAOYSA-H tungsten hexafluoride Chemical compound F[W](F)(F)(F)(F)F NXHILIPIEUBEPD-UHFFFAOYSA-H 0.000 claims description 17
- 239000011229 interlayer Substances 0.000 claims description 16
- 239000010410 layer Substances 0.000 claims description 16
- 238000007736 thin film deposition technique Methods 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 14
- 229910052786 argon Inorganic materials 0.000 claims description 10
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 9
- 239000001257 hydrogen Substances 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 3
- MROCJMGDEKINLD-UHFFFAOYSA-N dichlorosilane Chemical compound Cl[SiH2]Cl MROCJMGDEKINLD-UHFFFAOYSA-N 0.000 claims description 3
- PZPGRFITIJYNEJ-UHFFFAOYSA-N disilane Chemical compound [SiH3][SiH3] PZPGRFITIJYNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 238000005530 etching Methods 0.000 claims description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000000427 thin-film deposition Methods 0.000 abstract description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000005468 ion implantation Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 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
- 230000004888 barrier function Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- ZOCHARZZJNPSEU-UHFFFAOYSA-N diboron Chemical compound B#B ZOCHARZZJNPSEU-UHFFFAOYSA-N 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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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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- H01L21/28512—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table
- H01L21/28556—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table by chemical means, e.g. CVD, LPCVD, PECVD, laser CVD
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
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- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/06—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material
- C23C16/08—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material from metal halides
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- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
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- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45523—Pulsed gas flow or change of composition over time
- C23C16/45525—Atomic layer deposition [ALD]
- C23C16/45527—Atomic layer deposition [ALD] characterized by the ALD cycle, e.g. different flows or temperatures during half-reactions, unusual pulsing sequence, use of precursor mixtures or auxiliary reactants or activations
- C23C16/45529—Atomic layer deposition [ALD] characterized by the ALD cycle, e.g. different flows or temperatures during half-reactions, unusual pulsing sequence, use of precursor mixtures or auxiliary reactants or activations specially adapted for making a layer stack of alternating different compositions or gradient compositions
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Abstract
Description
Claims (20)
- 제 1 텅스텐막을 원자박막증착(Atomic layer deposition, ALD) 방법으로 형성하는 단계;상기 제 1 텅스텐막 상에 제 2 텅스텐막을 화학기상증착(Chemcial vapor deposition, CVD) 방법으로 형성하는 단계; 및상기 제 2 텅스텐막 상에 제 3 텅스텐막을 원자박막증착 방법으로 형성하는 단계를 구비하는 텅스텐막 형성 방법.
- 제 1 항에 있어서,상기 제 1 텅스텐막을 형성하는 단계와 상기 제 3 텅스텐막을 형성하는 단계는,환원 가스를 공급하는 단계;퍼지가스를 공급하여 퍼지하는 단계;텅스텐 소스 가스를 공급하는 단계; 및퍼지 가스를 공급하여 퍼지하는 단계를 주기적으로 반복하여 진행되는 것을 특징으로 하는 텅스텐막 형성 방법.
- 제 2 항에 있어서,상기 제 1 텅스텐막을 형성하는 단계와 상기 제 3 텅스텐막을 형성하는 단계 는 300~350℃의 온도에서 진행되는 것을 특징으로 하는 텅스텐막 형성 방법.
- 제 2 항에 있어서,상기 환원 가스는 모노실란(SiH4), 디실란(Si2H6), 사플르오르화규소(SiF 4), 디클로로실란(SiCl2H2)를 포함하는 그룹에서 선택되는 적어도 하나의 가스인 것을 특징으로 하는 텅스텐막 형성 방법.
- 제 2 항에 있어서,상기 텅스텐 소스 가스는 육불화텅스텐(WF6) 및 카르보닐화텅스텐(W(CO)6)을 포함하는 그룹에서 선택되는 적어도 하나의 가스인 것을 특징으로 하는 텅스텐막 형성 방법.
- 제 2 항에 있어서,상기 퍼지가스는 질소(N2), 아르곤(Ar) 및 헬륨(He)을 포함하는 그룹에서 선택되는 적어도 하나의 가스인 것을 특징으로 하는 텅스텐막 형성 방법.
- 제 1 항에 있어서,상기 제 2 텅스텐막을 형성하는 단계는 수소(H2)와 육불화텅스텐(WF6) 가스 를 공급하여 진행되는 것을 특징으로 하는 텅스텐막 형성 방법.
- 제 7 항에 있어서,상기 제 2 텅스텐막을 형성하는 단계는 370~420℃의 온도에서 진행되는 것을 특징으로 하는 텅스텐막 형성 방법.
- 제 1 항에 있어서,상기 제 1 텅스텐막을 형성하는 단계, 상기 제 2 텅스텐막을 형성하는 단계 및 상기 제 3 텅스텐막을 형성하는 단계는 36~44Torr의 압력에서 진행되는 것을 특징으로 하는 텅스텐막 형성 방법.
- 반도체 기판 상에 층간절연막을 형성하는 단계;제 1 텅스텐막을 원자박막증착 방법으로 형성하는 단계;상기 제 1 텅스텐막 상에 제 2 텅스텐막을 화학기상증착 방법으로 형성하는 단계; 및상기 제 2 텅스텐막 상에 제 3 텅스텐막을 원자박막증착 방법으로 형성하는 단계; 및상기 제 3 텅스텐막, 상기 제 2 텅스텐막 및 상기 제 1 텅스텐막을 연속적으로 식각하여 상기 층간절연막 상에 텅스텐막 패턴을 형성하는 단계를 구비하는 반도체 소자의 형성 방법.
- 제 10 항에 있어서,상기 층간절연막은 상기 반도체 기판을 노출시키는 콘택홀을 구비하며,상기 제 1 텅스텐막은 상기 콘택홀의 내부를 콘포말하게 덮도록 형성되며,상기 제 2 텅스텐막은 상기 콘택홀 내부를 채우도록 형성되는 것을 특징으로 하는 반도체 소자의 형성 방법.
- 제 10 항에 있어서,상기 층간절연막을 형성한 후에,상기 층간절연막을 관통하여 상기 반도체 기판과 접하는 콘택플러그를 형성하는 단계를 더 구비하되,상기 텅스텐막 패턴은 상기 콘택 플러그와 중첩되도록 형성되는 것을 특징으로 하는 반도체 소자의 형성 방법.
- 제 10 항에 있어서,상기 제 1 텅스텐막을 형성하는 단계와 상기 제 3 텅스텐막을 형성하는 단계는,환원 가스를 공급하는 단계;퍼지가스를 공급하여 퍼지하는 단계;텅스텐 소스 가스를 공급하는 단계; 및퍼지 가스를 공급하여 퍼지하는 단계를 주기적으로 반복하여 진행되는 것을 특징으로 하는 반도체 소자의 형성 방법.
- 제 13 항에 있어서,상기 제 1 텅스텐막을 형성하는 단계와 상기 제 3 텅스텐막을 형성하는 단계는 300~350℃의 온도에서 진행되는 것을 특징으로 하는 반도체 소자의 형성 방법.
- 제 13 항에 있어서,상기 환원 가스는 모노실란(SiH4), 디실란(Si2H6), 사플르오르화규소(SiF 4), 디클로로실란(SiCl2H2)를 포함하는 그룹에서 선택되는 적어도 하나의 가스인 것을 특징으로 하는 반도체 소자의 형성 방법.
- 제 13 항에 있어서,상기 텅스텐 소스 가스는 육불화텅스텐(WF6) 및 카르보닐화텅스텐(W(CO)6)을 포함하는 그룹에서 선택되는 적어도 하나의 가스인 것을 특징으로 하는 반도체 소자의 형성 방법.
- 제 13 항에 있어서,상기 퍼지가스는 질소(N2), 아르곤(Ar) 및 헬륨(He)을 포함하는 그룹에서 선 택되는 적어도 하나의 가스인 것을 특징으로 하는 반도체 소자의 형성 방법.
- 제 10 항에 있어서,상기 제 2 텅스텐막을 형성하는 단계는 수소(H2)와 육불화텅스텐(WF6) 가스를 공급하여 진행되는 것을 특징으로 하는 반도체 소자의 형성 방법.
- 제 18 항에 있어서,상기 제 2 텅스텐막을 형성하는 단계는 370~420℃의 온도에서 진행되는 것을 특징으로 하는 반도체 소자의 형성 방법.
- 제 10 항에 있어서,상기 제 1 텅스텐막을 형성하는 단계, 상기 제 2 텅스텐막을 형성하는 단계 및 상기 제 3 텅스텐막을 형성하는 단계는 36~44Torr의 압력에서 진행되는 것을 특징으로 하는 반도체 소자의 형성 방법.
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