KR100876860B1 - 반도체 소자의 다층금속배선 형성방법 - Google Patents
반도체 소자의 다층금속배선 형성방법 Download PDFInfo
- Publication number
- KR100876860B1 KR100876860B1 KR1020020036700A KR20020036700A KR100876860B1 KR 100876860 B1 KR100876860 B1 KR 100876860B1 KR 1020020036700 A KR1020020036700 A KR 1020020036700A KR 20020036700 A KR20020036700 A KR 20020036700A KR 100876860 B1 KR100876860 B1 KR 100876860B1
- Authority
- KR
- South Korea
- Prior art keywords
- etching
- metal wiring
- sccm
- forming
- flow rate
- Prior art date
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 67
- 239000002184 metal Substances 0.000 title claims abstract description 67
- 239000004065 semiconductor Substances 0.000 title claims abstract description 19
- 238000005530 etching Methods 0.000 claims abstract description 41
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 37
- 239000010937 tungsten Substances 0.000 claims abstract description 37
- 210000002381 Plasma Anatomy 0.000 claims abstract description 29
- 239000010410 layer Substances 0.000 claims abstract description 23
- 229920002120 photoresistant polymer Polymers 0.000 claims abstract description 21
- 238000005260 corrosion Methods 0.000 claims abstract description 16
- 239000011229 interlayer Substances 0.000 claims abstract description 13
- 239000000758 substrate Substances 0.000 claims abstract description 7
- 238000000151 deposition Methods 0.000 claims abstract description 6
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 5
- 238000005755 formation reaction Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 37
- 239000000460 chlorine Substances 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 10
- 229910052801 chlorine Inorganic materials 0.000 claims description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N chlorine atom Chemical compound 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[Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 4
- 229920000592 inorganic polymer Polymers 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 238000001465 metallisation Methods 0.000 claims 2
- 229910052782 aluminium Inorganic materials 0.000 description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound 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- H—ELECTRICITY
- H01—BASIC ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
- H01L23/522—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
- H01L23/532—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body characterised by the materials
- H01L23/53204—Conductive materials
- H01L23/53209—Conductive materials based on metals, e.g. alloys, metal silicides
- H01L23/53257—Conductive materials based on metals, e.g. alloys, metal silicides the principal metal being a refractory metal
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- H—ELECTRICITY
- H01—BASIC ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
- 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
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/033—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers
- H01L21/0334—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
- H01L21/0337—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising inorganic layers characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane characterised by the process involved to create the mask, e.g. lift-off masks, sidewalls, or to modify the mask, e.g. pre-treatment, post-treatment
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- H—ELECTRICITY
- H01—BASIC ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
- 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 at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System 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
- H01L21/32139—Physical or chemical etching of the layers, e.g. to produce a patterned layer from a pre-deposited extensive layer using masks
Abstract
Description
Claims (10)
- 하부 금속배선이 형성된 반도체 기판 상에 층간절연막을 형성하는 단계;상기 층간절연막의 적소에 상기 하부 금속배선과 콘택되는 텅스텐 플러그를 형성하는 단계;상기 텅스텐 플러그 및 층간절연막 상에 배선용 금속막을 증착하는 단계;상기 금속막 상에 4500∼5500Å 두께로 무기질의 하드 마스크막을 증착하는 단계;상기 하드 마스크막 상에 상부 금속배선 형성 영역을 한정하는 포토레지스트 패턴을 형성하는 단계;상기 포토레지스트 패턴을 식각 장벽으로 이용해서 상기 하드 마스크막을 식각하는 단계;상기 포토레지스트 패턴을 제거하는 단계; 및상기 텅스텐 플러그와 콘택되는 상부 금속배선이 형성되도록 상기 식각된 하드 마스크막을 식각 장벽으로 이용해서 상기 금속막을 식각하는 단계를 포함하는 것을 특징으로 하는 반도체 소자의 다층금속배선 형성방법.
- 삭제
- 제 1 항에 있어서, 상기 하드 마스크막을 식각하는 단계는압력을 900∼1100mTorr, 파워를 1200∼1400W, CHF3의 유량을 20∼30sccm, CF4의 유량을 100∼200sccm, Ar의 유량을 900∼1100sccm으로 하는 공정 조건으로 수행하는 것을 특징으로 하는 반도체 소자의 다층금속배선 형성방법.
- 제 1 항에 있어서, 상기 포토레지스트 패턴을 제거하는 단계는O2 가스를 15∼25ℓ/분, O3 가스를 90∼110g/N㎥, 웨이퍼 스테이지의 온도를 300∼400℃, 시간을 4∼6분 동안으로 하는 공정 조건으로 수행하는 것을 특징으로 하는 반도체 소자의 다층금속배선 형성방법.
- 제 1 항에 있어서, 상기 금속막을 식각하는 단계는주 식각 단계(main etch step)와 과도 식각 단계(over etch step)를 포함하는 것을 특징으로 하는 반도체 소자의 다층금속배선 형성방법.
- 제 5 항에 있어서, 상기 주 식각 단계는소오스 파워를 900∼1100W, 바이어스 파워를 90∼100W, 압력을 10∼12mTorr BCl3의 유량을 30∼50sccm, Cl2의 유량을 50∼70sccm, N2의 유량을 90∼110sccm으로 하는 공정 조건으로 수행하는 것을 특징으로 하는 반도체 소자의 다층금속배선 형성방법.
- 제 5 항에 있어서, 상기 과도 식각 단계는소오스 파워를 600∼ 800W, 바이어스 파워를 60∼80W, 압력을 10∼12mTorr, BCl3의 유량을 30∼50 sccm, Cl2의 유량을 50∼70sccm, N2의 유량을 90∼110sccm으로 하는 공정 조건으로 수행하는 것을 특징으로 하는 반도체 소자의 다층금속배선 형성방법.
- 제 1 항에 있어서, 상기 금속막을 식각하는 단계 후,식각 가스로 사용된 염소(chlorine)에 의한 금속막의 부식을 방지하기 위해 H2O 증기 플라즈마 공정을 수행하는 단계를 더 포함하는 것을 특징으로 하는 반도체 소자의 다층금속배선 형성방법.
- 제 8 항에 있어서, 상기 H2O 증기 플라즈마 공정은 플라즈마 파워를 1400∼ 1600W, 압력을 0.5∼1.5Torr, H2O의 유량을 900∼1100sccm으로 하는 공정 조건으로 수행하는 것을 특징으로 하는 반도체 소자의 다층금속배선 형성방법.
- 제 8 항에 있어서, 상기 H2O 증기 플라즈마 공정을 수행하는 단계 후,금속막 식각후에 잔존하는 무기질 폴리머(inoganic polymer)를 제거하기 위해 솔벤트(solvent)를 이용한 세정 단계를 더 포함하는 것을 특징으로 하는 반도체 소자의 다층금속배선 형성방법.
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JPH0831800A (ja) * | 1994-07-13 | 1996-02-02 | Sony Corp | プラズマエッチング方法 |
JPH0869995A (ja) * | 1994-08-30 | 1996-03-12 | Sony Corp | プラズマエッチング方法 |
JPH11186237A (ja) * | 1997-12-25 | 1999-07-09 | Sony Corp | 半導体装置の製造方法 |
JP2000012514A (ja) * | 1998-06-19 | 2000-01-14 | Hitachi Ltd | 後処理方法 |
KR20020006045A (ko) * | 1999-05-07 | 2002-01-18 | 조셉 제이. 스위니 | 반도체 장치의 제조방법 |
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JPH0831800A (ja) * | 1994-07-13 | 1996-02-02 | Sony Corp | プラズマエッチング方法 |
JPH0869995A (ja) * | 1994-08-30 | 1996-03-12 | Sony Corp | プラズマエッチング方法 |
JPH11186237A (ja) * | 1997-12-25 | 1999-07-09 | Sony Corp | 半導体装置の製造方法 |
JP2000012514A (ja) * | 1998-06-19 | 2000-01-14 | Hitachi Ltd | 後処理方法 |
KR20020006045A (ko) * | 1999-05-07 | 2002-01-18 | 조셉 제이. 스위니 | 반도체 장치의 제조방법 |
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