KR950009281B1 - 알루미늄 금속배선 형성방법 - Google Patents
알루미늄 금속배선 형성방법 Download PDFInfo
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- KR950009281B1 KR950009281B1 KR1019920012265A KR920012265A KR950009281B1 KR 950009281 B1 KR950009281 B1 KR 950009281B1 KR 1019920012265 A KR1019920012265 A KR 1019920012265A KR 920012265 A KR920012265 A KR 920012265A KR 950009281 B1 KR950009281 B1 KR 950009281B1
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- Prior art keywords
- aluminum metal
- metal wiring
- chlorine
- aluminum
- wiring
- Prior art date
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 18
- 229910052782 aluminium Inorganic materials 0.000 title abstract 3
- 239000000460 chlorine Substances 0.000 claims abstract description 20
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 17
- 229920002120 photoresistant polymer Polymers 0.000 claims abstract description 14
- -1 alkyl ketone Chemical class 0.000 claims abstract description 6
- 238000005530 etching Methods 0.000 claims abstract description 5
- 150000005215 alkyl ethers Chemical class 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims 1
- 239000001301 oxygen Substances 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000004411 aluminium Substances 0.000 abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000000637 aluminium metallisation Methods 0.000 description 2
- 150000001805 chlorine compounds Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000001465 metallisation Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
-
- 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
- H01L21/02041—Cleaning
- H01L21/02057—Cleaning during device manufacture
- H01L21/02068—Cleaning during device manufacture during, before or after processing of conductive layers, e.g. polysilicon or amorphous silicon layers
- H01L21/02071—Cleaning during device manufacture during, before or after processing of conductive layers, e.g. polysilicon or amorphous silicon layers the processing being a delineation, e.g. RIE, of conductive layers
-
- C—CHEMISTRY; METALLURGY
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F4/00—Processes for removing metallic material from surfaces, not provided for in group C23F1/00 or C23F3/00
-
- 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
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/3213—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer
- H01L21/32133—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only
- H01L21/32135—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only by vapour etching only
- H01L21/32136—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer by chemical means only by vapour etching only using plasmas
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Plasma & Fusion (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Drying Of Semiconductors (AREA)
Abstract
내용 없음.
Description
본 발명은 고집적 반도체 소자의 알루미늄 금속배선 형성방법에 관한 것으로, 특히 클로린(Cl2)을 포함하는 플라즈마로 알루미늄 금속배선의 패턴을 형성한 다음, 알루미늄 금속배선 표면에 잔류되는 클로린에 의해 알루미늄 금속배선이 부식(corrosion)되는 것을 방지하기 위한 방법에 관한 것이다.
일반적으로 알루미늄 금속배선을 형성하기 위하여 알루미늄 금속층을 형성하고, 그 상부에 감광막 패턴을 형성한 후, 클로린을 포함하는 플라즈마를 이용하여 감광막 패턴 저부의 노출된 알루미늄 금속층을 식각하여 알루미늄 금속배선의 패턴을 형성하고, 남아있는 감광막 패턴을 제거하였다. 그러나, 이러한 공정으로 이루어진 알루미늄 금속배선이 대기중에 노출되면 알루미늄 금속배선의 표면에 남아있는 클로린에 의해 알루미늄 금속배선이 부식된다.
따라서, 종래 기술에서는 상기한 알루미늄 금속배선이 부식되는 문제점을 해결하기 위하여 알루미늄 금속배선을 형성한 다음 다음과 같은 방법을 사용하였다.
첫째는D.I수(D.I water)로 클로린 화합물을 씻어내는 방법이 있다.
둘째는 열처리 공정으로 잔류하는 클로라이드 화합물을 증발(Voporaze)시키는 방법이 있다.
셋째는 CHF3등의 플라즈마를 이용하여 형성된 알루미늄 금속배선 측벽에 폴리머(Polymer)를 형성시켜 잔류의 클로라이트 화합물을 덮어씌우는(encapsulation) 방법이 있다.
넷째는 CF4플라즈마를 이용하여 플루오린(F)으로 잔류 클로린을 대치시키는 방법이 있다.
그러나, 상기 첫째방법은 장기적으로 부식을 방지할 수 없으며, 둘째방법은 열처리시 300℃ 이상이 되면 힐록(hillocks), 세그리게이션(Segregation), 재결합화(recrystalization)등의 문제점이 있으며, 셋째방법은 대기중에 알루미늄 금속배선이 노출될 때 종종 생성된 보호층 폴리머가 파손되어 알루미늄 금속배선이 부식된다. 또한, 넷째방법은 잔류하는 클로린을 완전히 제거하기 위하여 과도의 CF4플라즈마 처리를 요구하며 이때 베리어 금속층인 TiN 또는 TiW의 언더킷(undercut)과 하부 옥사이드층의 과도한 손실을 유도한다.
그로인하여 현재에는 대부분의 금속식각장비에 O2플라즈마 에쉬 챔버(Ash Chamber)를 부착하여 금속배선이 대기에 노출되기전에 인-시투 공정으로 플라즈마를 이용하여 감광막을 제거하고 동시에 알루미늄 산화막을 형성하여 금속배선의 부식을 방지하고 있다.
그러나, 본 발명은 알루미늄 금속층을 식각하여 알루미늄 금속배선을 형성한 다음, 감광막 패턴을 제거하는 동시에 잔류클로린을 효과적으로 제거하는 방법을 제공하는데 그 목적이 있다.
이하에서 본 발명을 상세히 설명하기로 한다.
절연층 상부에 알루미늄 금속층을 증착하고, 상기 알루미늄 금속층의 패턴을 형성하기 위해 알루미늄 금속층 상부에 감광막을 도포하고, 리소그라피 기술로 감광막 패턴을 형성한 다음, 노출된 알루미늄 금속층을 클로린(Cl2)이 포함된 플라즈마로 식각하여 알루미늄 금속배선을 형성하는 단계까지의 공지의 기술과 동일하다. 그리고 상기 감광막 패턴을 O2플라스마 에쉬 챔버에서 제거할때 본 발명은 O2플라즈마 에쉬 챔버(ash chamber)에 알킬케톤또는 알킬에테르(R-O-R')를 첨가시켜서 감광막 패턴을 제거하는 동시에 잔류클로린을 효과적으로 제거하는 것이다.
본 발명의 원리는 알킬케톤이나 알킬에테르(R-O-R')는 플라즈마내에서 다음의 (1) 및 (2)식과 같이 분리된다.
여기서 생성된 알킬레디칼(2R·)은 금속배선상의 잔류클로린과 결합하여 다음(3)식과 같이 2RCl로 결합하여 증발된다.
2R·+Cl→ 2RCl↑ ………………………………………… (3)
또한 상기 (2)식에서 생성된 옥시젼 레디칼(O')은 감광막 패턴 제거와 금속배선 표면의 산화막 형성에 효과적으로 기여할 수 있다.
상기한 바와같이 본 발명은 기존의 O2에쉬 챔버에 알킬케톤이나 알킬에테르(R-O-R')를 첨가함으로써, 생성되는 알킬레디칼로 잔류클로린을 제거하므로 장기간의 침식작용을 방지할 수 있다.
또한 본 발명에 의하면 금속배선의 상(profile)이나 하부옥사이드층의 감소가 전혀없이 잔류클로린을 제거할 수 있다.
Claims (2)
- 알루미늄 금속층 상부에 감광막 패턴을 형성한 다음, 클로린이 포함된 플라즈마로 노출된 알루미늄 금속층을 식각하여 알루미늄 금속패턴을 형성하고, 상기 감광막 패턴을 제거하는 공정으로 이루어지는 알루미늄 금속배선 형성방법에 있어서, 알루미늄 금속배선의 표면에 클로린이 잔류하여 알루미늄 금속배선이 부식되는 것을 방지하기 위하여, 상기 감광막 패턴을 제거하기 위한 O2플라즈마 에쉬 챔버에 알킬케톤을 첨가하여 감광막 패턴을 제거하는 동시에 알루미늄 금속배선의 표면에 잔류하는 클로린을 제거하는 것을 특징으로 하는 알루미늄 금속배선 형성방법.
- 제1항에 있어서, 상기 O2플라즈마 에쉬 챔버에 첨가하는 알킬페톤대신에 알킬에테르(R-O-R')를 첨가하는 것을 특징으로 하는 알루미늄 금속배선 형성방법.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019920012265A KR950009281B1 (ko) | 1992-07-10 | 1992-07-10 | 알루미늄 금속배선 형성방법 |
US08/088,187 US5399236A (en) | 1992-07-10 | 1993-07-06 | Method for manufacturing a semiconductor device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019920012265A KR950009281B1 (ko) | 1992-07-10 | 1992-07-10 | 알루미늄 금속배선 형성방법 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR940002945A KR940002945A (ko) | 1994-02-19 |
KR950009281B1 true KR950009281B1 (ko) | 1995-08-18 |
Family
ID=19336106
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019920012265A KR950009281B1 (ko) | 1992-07-10 | 1992-07-10 | 알루미늄 금속배선 형성방법 |
Country Status (2)
Country | Link |
---|---|
US (1) | US5399236A (ko) |
KR (1) | KR950009281B1 (ko) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2674488B2 (ja) * | 1993-12-01 | 1997-11-12 | 日本電気株式会社 | ドライエッチング室のクリーニング方法 |
US5545289A (en) * | 1994-02-03 | 1996-08-13 | Applied Materials, Inc. | Passivating, stripping and corrosion inhibition of semiconductor substrates |
US5840203A (en) * | 1996-12-02 | 1998-11-24 | Taiwan Semiconductor Manufacturing Company Ltd. | In-situ bake step in plasma ash process to prevent corrosion |
US6006764A (en) * | 1997-01-28 | 1999-12-28 | Taiwan Semiconductor Manufacturing Company, Ltd. | Method of stripping photoresist from Al bonding pads that prevents corrosion |
US5854134A (en) * | 1997-05-05 | 1998-12-29 | Taiwan Semiconductor Manufacturing Company Ltd. | Passivation layer for a metal film to prevent metal corrosion |
US6300241B1 (en) | 1998-08-19 | 2001-10-09 | National Semiconductor Corporation | Silicon interconnect passivation and metallization process optimized to maximize reflectance |
JP3652145B2 (ja) * | 1998-11-17 | 2005-05-25 | 茂徳科技股▲フン▼有限公司 | プラグの腐蝕を防止する内部配線の製造方法 |
US6429142B1 (en) * | 1999-02-23 | 2002-08-06 | Taiwan Semiconductor Manufacturing Company | In-situ photoresist removal by an attachable chamber with light source |
US6657376B1 (en) | 1999-06-01 | 2003-12-02 | Micron Technology, Inc. | Electron emission devices and field emission display devices having buffer layer of microcrystalline silicon |
US6650043B1 (en) | 1999-07-20 | 2003-11-18 | Micron Technology, Inc. | Multilayer conductor structure for use in field emission display |
US7052350B1 (en) * | 1999-08-26 | 2006-05-30 | Micron Technology, Inc. | Field emission device having insulated column lines and method manufacture |
US6461971B1 (en) * | 2000-01-21 | 2002-10-08 | Chartered Semiconductor Manufacturing Ltd. | Method of residual resist removal after etching of aluminum alloy filmsin chlorine containing plasma |
US6440864B1 (en) | 2000-06-30 | 2002-08-27 | Applied Materials Inc. | Substrate cleaning process |
US6692903B2 (en) | 2000-12-13 | 2004-02-17 | Applied Materials, Inc | Substrate cleaning apparatus and method |
US20030200835A1 (en) * | 2002-04-02 | 2003-10-30 | Snecma Services | Diffusion-brazing filler powder for parts made of an alloy based on nickel, cobalt or iron |
GR1006618B (el) * | 2008-06-13 | 2009-12-03 | Εθνικο Κεντρο Ερευνας Φυσικων Επιστημων (Εκεφε) "Δημοκριτος" | Μεθοδος για την κατασκευη περιοδικων δομων σε πολυμερη με διεργασιες πλασματος |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4372807A (en) * | 1982-03-25 | 1983-02-08 | Rca Corporation | Plasma etching of aluminum |
JPS6077429A (ja) * | 1983-10-04 | 1985-05-02 | Asahi Glass Co Ltd | ドライエツチング方法 |
US5068007A (en) * | 1990-09-24 | 1991-11-26 | Motorola, Inc. | Etching of materials in a noncorrosive environment |
JP2663704B2 (ja) * | 1990-10-30 | 1997-10-15 | 日本電気株式会社 | Al合金の腐食防止法 |
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1992
- 1992-07-10 KR KR1019920012265A patent/KR950009281B1/ko not_active IP Right Cessation
-
1993
- 1993-07-06 US US08/088,187 patent/US5399236A/en not_active Expired - Lifetime
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KR940002945A (ko) | 1994-02-19 |
US5399236A (en) | 1995-03-21 |
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