JP2022511087A - コバルトcmpのための組成物および方法 - Google Patents
コバルトcmpのための組成物および方法 Download PDFInfo
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- JP2022511087A JP2022511087A JP2021532102A JP2021532102A JP2022511087A JP 2022511087 A JP2022511087 A JP 2022511087A JP 2021532102 A JP2021532102 A JP 2021532102A JP 2021532102 A JP2021532102 A JP 2021532102A JP 2022511087 A JP2022511087 A JP 2022511087A
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- JP
- Japan
- Prior art keywords
- polishing composition
- triazole
- pyridine
- compound
- polishing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000010941 cobalt Substances 0.000 title claims abstract description 84
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- LRUDIIUSNGCQKF-UHFFFAOYSA-N 5-methyl-1H-benzotriazole Chemical compound C1=C(C)C=CC2=NNN=C21 LRUDIIUSNGCQKF-UHFFFAOYSA-N 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical class C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09G—POLISHING COMPOSITIONS; SKI WAXES
- C09G1/00—Polishing compositions
- C09G1/02—Polishing compositions containing abrasives or grinding agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/005—Control means for lapping machines or devices
- B24B37/0056—Control means for lapping machines or devices taking regard of the pH-value of lapping agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/04—Lapping machines or devices; Accessories designed for working plane surfaces
- B24B37/042—Lapping machines or devices; Accessories designed for working plane surfaces operating processes therefor
- B24B37/044—Lapping machines or devices; Accessories designed for working plane surfaces operating processes therefor characterised by the composition of the lapping agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
- B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/1454—Abrasive powders, suspensions and pastes for polishing
- C09K3/1463—Aqueous liquid suspensions
-
- 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
- H01L21/32115—Planarisation
- H01L21/3212—Planarisation by chemical mechanical polishing [CMP]
-
- 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
- H01L21/3105—After-treatment
- H01L21/31051—Planarisation of the insulating layers
- H01L21/31053—Planarisation of the insulating layers involving a dielectric removal step
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Abstract
Description
さまざまな研磨組成物を調製した(対照Aおよび実施例組成物1~12)。例示的な研磨組成物1~12は、さまざまなアゾール化合物を含んでいた。カチオン性コロイダルシリカが、0.5質量パーセントの最終濃度を有するように、対応する混合物に50nmの平均粒径を有する適切な量のカチオン性コロイダルシリカ粒子を添加することによって、13種の研磨組成物の各々を調製した。カチオン性コロイダルシリカ粒子は、米国特許第9,382,450号の実施例7に記載されるように調製された。最終組成物の各々は、1.68mMの対応するアゾール化合物、2mMのトリス(ヒドロキシメチル)アミノメタン、125ppmのKordek殺生物剤をpH7.1でさらに含んでいた。対照Aは、アゾール化合物を含まなかった。実施例1~12の各々で使用した特定のアゾール化合物を、表1に提供する。組成物の各々(対照Aおよび実施例1~12)は、pH7.1で約25mVのゼータ電位を有した。
この実施例では、実施例1の研磨組成物1~7の、コバルトおよびTEOSの研磨速度ならびに洗浄性(欠陥)を評価した。この実施例は、トリアゾールピリジンコバルト抑制剤を使用すると、CMP後の洗浄ステップ後の最も低い数の欠陥を生じることを実証する。コバルトおよびTEOSの研磨速度は、ブランケットコバルトおよびTEOSウェハを研磨することによって得た。1.5psiの下向きの力、93rpmのプラテン速度、および87rpmのヘッド速度で、Mirra(登録商標)CMP研磨ツールおよびFujibo H7000研磨パッドを使用して、ウェハを研磨した。スラリー流速は、200ml/分であった。研磨後、ONTRAKクリーナーでK8160-1(Cabot Microelectronicsから入手可能)を使用して、各2つのブラシボックス内で60秒間、コバルトウェハを洗浄した。欠陥カウントは、0.16μmのしきい値でSurfscanSP1を使用して収集されました。走査型電子顕微鏡を使用して欠陥の画像を収集し、得られた画像を目視検査することを通じて欠陥の分類を完了した。観察された欠陥は、主に有機表面残留物であった。コバルトおよびTEOSの研磨速度および欠陥データを、表2に示す。
Claims (24)
- コバルト含有基板を研磨するための化学機械研磨組成物であって、
水系液体キャリアと、
前記液体キャリア中に分散されたカチオン性シリカ研削粒子であって、前記カチオン性シリカ研削粒子が、前記研磨組成物中で少なくとも10mVのゼータ電位を有する、カチオン性シリカ研削粒子と、
トリアゾール化合物であって、ベンゾトリアゾールまたはベンゾトリアゾール化合物ではない、トリアゾール化合物と、を含み、
前記研磨組成物が、約6超のpHを有する、研磨組成物。 - 前記トリアゾール化合物が、トリアゾールピリジン化合物である、請求項1に記載の組成物。
- 前記トリアゾールピリジン化合物が、1H-1,2,3-トリアゾロ[4,5,b]ピリジン、1-アセチル-1H-1,2,3-トリアゾロ[4,5,b]ピリジン、3H-[1,2,3]トリアゾロ[4,5-c]ピリジン、2-(1,2,4-トリアゾール-3-イル)ピリジン、またはそれらの混合物である、請求項2に記載の組成物。
- 前記トリアゾールピリジン化合物が、1H-1,2,3-トリアゾロ[4,5,b]ピリジンである、請求項2に記載の組成物。
- 約50~約500ppmの前記トリアゾールピリジン化合物を含む、請求項2に記載の組成物。
- 前記研磨組成物が、過化合物酸化剤(per-compound oxidizer)を実質的に含まない、請求項1に記載の組成物。
- 約6~約8のpHを有する、請求項1に記載の組成物。
- 前記カチオン性シリカ研削粒子が、約9超の等電点を有する、請求項1に記載の組成物。
- 前記カチオン性シリカ研削粒子が、約6超のpHで少なくとも20mVの永久正電荷を有するコロイダルシリカ粒子を含む、請求項1に記載の組成物。
- 約2質量パーセント未満の前記カチオン性シリカ研削粒子を含む、請求項1に記載の組成物。
- コバルト層を含む基板を化学機械研磨する方法であって、
(a)
(i)水系液体キャリア、
(ii)前記液体キャリア中に分散されたカチオン性シリカ研削粒子であって、前記カチオン性シリカ研削粒子が、少なくとも10mVのゼータ電位を有する、カチオン性シリカ研削粒子、
(iii))トリアゾール化合物であって、ベンゾトリアゾールまたはベンゾトリアゾール化合物ではない、トリアゾール化合物、を含む研磨組成物に前記基板を接触させることであって、
前記研磨組成物が、約6超のpHを有する、前記基板を接触させることと、
(b)前記研磨組成物を前記基板に対して動かすことと、
(c)前記基板を研削して、前記基板から前記コバルトの一部分を除去し、それによって前記基板を研磨することと、を含む、方法。 - 前記トリアゾール化合物が、トリアゾールピリジン化合物である、請求項11に記載の方法。
- 前記トリアゾールピリジン化合物が、1H-1,2,3-トリアゾロ[4,5,b]ピリジン、1-アセチル-1H-1,2,3-トリアゾロ[4,5,b]ピリジン、3H-[1,2,3]トリアゾロ[4,5-c]ピリジン、2-(1,2,4-トリアゾール-3-イル)ピリジン、またはそれらの混合物である、請求項12に記載の方法。
- 前記トリアゾールピリジン化合物が、1H-1,2,3-トリアゾロ[4,5,b]ピリジンである、請求項12に記載の方法。
- 前記研磨組成物が、約50~約500ppmの前記トリアゾールピリジン化合物を含む、請求項12に記載の方法。
- 前記研磨組成物が、過化合物酸化剤を実質的に含まない、請求項11に記載の方法。
- 前記研磨組成物が、約6~約8のpHを有する、請求項11に記載の方法。
- 前記カチオン性シリカ研削粒子が、約9超の等電点を有する、請求項11に記載の方法。
- 前記カチオン性シリカ研削粒子が、約6超のpHで少なくとも20mVの永久正電荷を有するコロイダルシリカ粒子を含む、請求項11に記載の方法。
- 約2質量パーセント未満の前記カチオン性シリカ研削粒子を含む、請求項11に記載の方法。
- 前記基板が、誘電体層をさらに含み、前記(c)の研削が、前記基板から前記誘電体層の一部分をも除去する、請求項11に記載の方法。
- (c)の前記誘電体層の除去速度が、(c)のコバルトの除去速度よりも高い、請求項11に記載の方法。
- 前記誘電体層が、テトラエチルオルトケイ酸塩(TEOS)である、請求項22に記載の方法。
- コバルト含有基板を研磨するための化学機械研磨組成物であって、
水系液体キャリアと、
前記液体キャリア中に分散されたカチオン性シリカ研削粒子であって、前記カチオン性シリカ研削粒子が、前記研磨組成物中で少なくとも10mVのゼータ電位を有する、カチオン性シリカ研削粒子と、
トリアゾールピリジン化合物と、を含み、
前記研磨組成物が、約6超のpHを有する、研磨組成物。
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US16/208,703 US20200172759A1 (en) | 2018-12-04 | 2018-12-04 | Composition and method for cobalt cmp |
US16/208,703 | 2018-12-04 | ||
PCT/US2019/061247 WO2020117438A1 (en) | 2018-12-04 | 2019-11-13 | Composition and method for cobalt cmp |
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CN111635701B (zh) * | 2020-06-30 | 2021-07-09 | 中国科学院上海微系统与信息技术研究所 | 一种钴基材抛光液及其应用 |
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US20230059396A1 (en) | 2023-02-23 |
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