KR101315173B1 - 배선 구조 및 그 형성 방법 - Google Patents
배선 구조 및 그 형성 방법 Download PDFInfo
- Publication number
- KR101315173B1 KR101315173B1 KR1020127009191A KR20127009191A KR101315173B1 KR 101315173 B1 KR101315173 B1 KR 101315173B1 KR 1020127009191 A KR1020127009191 A KR 1020127009191A KR 20127009191 A KR20127009191 A KR 20127009191A KR 101315173 B1 KR101315173 B1 KR 101315173B1
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- South Korea
- Prior art keywords
- copper wiring
- wiring
- copper
- barrier layer
- forming
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 90
- 239000010949 copper Substances 0.000 claims abstract description 207
- 229910052802 copper Inorganic materials 0.000 claims abstract description 183
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 182
- 230000004888 barrier function Effects 0.000 claims abstract description 64
- 239000000758 substrate Substances 0.000 claims abstract description 47
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000012964 benzotriazole Substances 0.000 claims abstract description 32
- 238000004140 cleaning Methods 0.000 claims abstract description 17
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- 125000000962 organic group Chemical group 0.000 claims abstract description 4
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- 150000002894 organic compounds Chemical class 0.000 claims description 2
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- 150000002736 metal compounds Chemical class 0.000 claims 1
- 230000001681 protective effect Effects 0.000 abstract description 48
- 239000007864 aqueous solution Substances 0.000 abstract description 24
- 239000003513 alkali Substances 0.000 abstract description 10
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- 230000000052 comparative effect Effects 0.000 description 9
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- 239000011229 interlayer Substances 0.000 description 9
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 7
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910001431 copper ion Inorganic materials 0.000 description 4
- 229910052814 silicon oxide Inorganic materials 0.000 description 4
- 238000004544 sputter deposition Methods 0.000 description 4
- -1 Ti (titanium) Chemical class 0.000 description 3
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- 239000002585 base Substances 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
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- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 150000001879 copper Chemical class 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
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- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000005011 time of flight secondary ion mass spectroscopy Methods 0.000 description 2
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 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
- 239000012790 adhesive layer Substances 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
- 125000003354 benzotriazolyl group Chemical group N1N=NC2=C1C=CC=C2* 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
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- 230000005012 migration Effects 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76838—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 conductors
- H01L21/76877—Filling of holes, grooves or trenches, e.g. vias, with conductive material
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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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- H01L21/18—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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- H01L21/18—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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- H01L21/31—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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- H01L21/76801—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
- H01L21/76829—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 characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers
- H01L21/76834—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 characterised by the formation of thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers formation of thin insulating films on the sidewalls or on top of conductors
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- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76838—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 conductors
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/7685—Barrier, adhesion or liner layers the layer covering a conductive structure
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- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76871—Layers specifically deposited to enhance or enable the nucleation of further layers, i.e. seed layers
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- 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
- H01L23/53228—Conductive materials based on metals, e.g. alloys, metal silicides the principal metal being copper
- H01L23/53238—Additional layers associated with copper layers, e.g. adhesion, barrier, cladding layers
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- H01L21/76838—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 conductors
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- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/24—Reinforcing the conductive pattern
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Parts Printed On Printed Circuit Boards (AREA)
- Manufacturing Of Printed Wiring (AREA)
Abstract
이러한 과제를 해결하기 위해, 기판 상방에 구리 배선을 형성한 후, 산(酸) 세정을 행하여 구리 배선의 표면을 활성화한다. 그 후, BTA(Benzo triazole) 수용액에 기판을 침지하여, 구리 배선의 표면을 덮는 보호막을 형성한다. 이때, 구리 배선의 표면의 입계(粒界) 부분에 Cu-N-R 결합(R은 유기기)이 형성된다. 그 후, 알칼리 세정을 행하여 보호막을 제거한다. 보호막 제거 후에도, 구리 배선의 표면의 입계 부분에는 Cu-N-R 결합이 남는다. 계속하여, 구리 배선의 표면을 액티베이션 처리한 후, 구리 배선의 표면에 NiP 또는 CoWP를 무전해 도금하여 배리어층을 형성한다.
Description
도 2는 세미애디티브법에 의한 구리 배선의 형성 방법의 일례를 나타내는 도면(그 2).
도 3은 제1 실시형태에 따른 배선 구조의 형성 방법을 나타내는 단면도(그 1).
도 4는 제1 실시형태에 따른 배선 구조의 형성 방법을 나타내는 단면도(그 2).
도 5는 제1 실시형태에 따른 배선 구조의 형성 방법을 나타내는 단면도(그 3).
도 6은 구리 배선의 형성에서 배리어층의 형성까지의 플로우를 나타내는 도면.
도 7의 (a)∼(c)는 보호 피막을 형성하는 공정에서 배리어층을 형성하는 공정까지를 모식적으로 나타내는 도면.
도 8의 (a), (b)는 Cu-N-R 결합의 형성 과정을 나타내는 모식도.
도 9는 부식 전류 측정 방법을 나타내는 모식도.
도 10은 부식 전류 밀도의 측정 결과를 나타내는 도면.
도 11은 알칼리 세정 공정까지 실시한 구리 배선의 표면을 TOF-SIMS에 의해 질량 분석한 결과를 나타내는 도면.
도 12는 보호 피막을 제거한 후의 구리 배선의 표면의 현미경 사진을 2치화 처리하여 나타내는 도면.
도 13은 배리어층 형성 후의 구리 배선의 표면의 현미경 사진을 2치화 처리하여 나타내는 도면.
도 14의 (a)는 배리어층으로서 NiP를 사용한 실시예 1의 시료의 단면 현미경 사진을 2치화 처리하여 나타내는 도면이며, 도 14의 (b)는 배리어층으로서 CoWP를 사용한 실시예 1의 시료의 단면 현미경 사진을 2치화 처리하여 나타내는 도면.
도 15의 (a)는 배리어층으로서 NiP를 사용한 비교예의 시료의 단면 현미경 사진을 2치화 처리하여 나타내는 도면이며, 도 15의 (b)는 배리어층으로서 CoWP를 사용한 비교예의 시료의 단면 현미경 사진을 2치화 처리하여 나타내는 도면.
도 16은 배리어층으로서 CoWP를 사용한 실시예 2의 시료의 단면 현미경 사진을 2치화 처리하여 나타내는 도면.
도 17은 제2 실시형태에 따른 배선 구조의 형성 방법을 나타내는 단면도(그 1).
도 18은 제2 실시형태에 따른 배선 구조의 형성 방법을 나타내는 단면도(그 2).
도 19는 제2 실시형태에 따른 배선 구조의 형성 방법을 나타내는 단면도(그 3).
도 20은 제2 실시형태에 따른 배선 구조의 형성 방법을 나타내는 단면도(그 4).
도 21은 제3 실시형태에 따른 배선 구조의 형성 방법을 나타내는 단면도(그 1).
도 22는 제3 실시형태에 따른 배선 구조의 형성 방법을 나타내는 단면도(그 2).
도 23은 제3 실시형태에 따른 배선 구조의 형성 방법을 나타내는 단면도(그 3).
Claims (11)
- 삭제
- 기판의 상방에 구리 배선을 형성하는 공정과,
상기 구리 배선을 유기 화합물에 접촉시켜 상기 구리 배선의 표면의 입계(粒界) 부분에 Cu-N-R 결합(단, R은 유기기)을 형성하는 공정과,
세정액에 의해 상기 구리 배선의 표면을 세정하는 공정과,
상기 세정 후의 상기 구리 배선의 표면에 금속을 피착시켜 배리어층을 형성하는 공정과,
상기 기판의 상방에, 상기 구리 배선 및 상기 배리어층을 덮는 절연막을 형성하는 공정을 갖고,
상기 Cu-N-R 결합을 형성하는 공정 및 상기 구리 배선의 표면을 세정하는 공정은, pH를 8.0 내지 10.0의 범위 내로 조정한 BTA(Benzo triazole) 수용액을 사용하여 동시에 행하는 것을 특징으로 하는 배선 구조의 형성 방법. - 삭제
- 삭제
- 제2항에 있어서,
상기 배리어층을 무전해 도금에 의해 형성하는 것을 특징으로 하는 배선 구조의 형성 방법. - 제2항에 있어서,
상기 배리어층이 CoWP, CoWB, CoP, CoB, NiP, NiWP, NiB 및 NiWB 중 1종의 금속 화합물을 포함하는 것을 특징으로 하는 배선 구조의 형성 방법. - 삭제
- 제2항에 있어서,
상기 구리 배선의 표면을 세정하는 공정과 상기 배리어층을 형성하는 공정의 사이에, Pd를 함유하는 산성의 처리액에 의해 상기 구리 배선의 표면을 활성화시키는 공정을 더 갖는 것을 특징으로 하는 배선 구조의 형성 방법. - 삭제
- 삭제
- 삭제
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CN103489900B (zh) * | 2013-09-04 | 2016-05-04 | 京东方科技集团股份有限公司 | 一种阻挡层及其制备方法、薄膜晶体管、阵列基板 |
JP6582850B2 (ja) * | 2015-10-09 | 2019-10-02 | 富士通株式会社 | 密着性向上材料、配線構造、及びその製造方法、並びに半導体装置、及びその製造方法 |
JP6975584B2 (ja) * | 2017-09-07 | 2021-12-01 | 東京エレクトロン株式会社 | 半導体装置 |
US11508857B2 (en) * | 2019-02-04 | 2022-11-22 | University Of Florida Research Foundation, Incorporated | Optical scrambler with nano-pyramids |
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US20120181070A1 (en) | 2012-07-19 |
EP2521165A1 (en) | 2012-11-07 |
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EP2521165B1 (en) | 2018-09-12 |
JPWO2011080827A1 (ja) | 2013-05-09 |
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