JP2022511525A - 金属cmpのための組成物および方法 - Google Patents
金属cmpのための組成物および方法 Download PDFInfo
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- JP2022511525A JP2022511525A JP2021532105A JP2021532105A JP2022511525A JP 2022511525 A JP2022511525 A JP 2022511525A JP 2021532105 A JP2021532105 A JP 2021532105A JP 2021532105 A JP2021532105 A JP 2021532105A JP 2022511525 A JP2022511525 A JP 2022511525A
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- substrate
- metal oxide
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Classifications
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- 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
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- 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
- C09G—POLISHING COMPOSITIONS; SKI WAXES
- C09G1/00—Polishing compositions
-
- 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
- C09G1/04—Aqueous dispersions
-
- 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
- C09K3/1436—Composite particles, e.g. coated particles
-
- 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
-
- 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
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- 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
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- H01L21/3212—Planarisation by chemical mechanical polishing [CMP]
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- 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
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Abstract
Description
--Si(X)n-[L-O-R-A]3-n(1)
--Si(X)n-[L-CR1(OH)-C(R2)2-A]3-n(2)
--Si(X)n-[L-O-R-A]3-n(1)
--Si(X)n-[L-O-R-A]3-n(1)
-Si(X)n-[L-CR1(OH)-C(R2)2-A]3-n(2)
2-(3,4-エポキシシクロヘキサンキシル)エチルトリエトキシシランを挙げることができ、2-(3,4-エポキシシクロヘキシル)エチルトリメトキシシランが好ましい。
-Si(X)n-[L-CR1(OH)-C(R2)2-A]3-n (2)
-Si(X)n-[L-O-R-A]3-n
コロイダルシリカ分散液を、以下のように調製した。160.2グラムのトリエチルアミンを9000グラムのBS-2コロイダルシリカ分散液中に撹拌することによって、混合物を調製した。BS-2コロイダルシリカ分散液は、Fuso Chemical Company,Ltd.,Japanから入手可能であり、水中に20質量パーセントのコロイダルシリカを含む。この混合物を55℃まで加熱した。124.7グラムの3-グリシジルオキシプロピルトリメトキシシラン(GPTMS)を499.1グラムのメタノールに添加することによって、シラン溶液を調製した。混合物の温度を55℃に維持しながら、シラン溶液を上述の混合物に一定速度で1時間添加した。次いで、混合物(添加した溶液を含む)の温度を55℃で、さらに30分間保持し、その後室温まで冷却した。3450グラムの冷却した混合物の試料に、測定31.3グラムの酢酸を添加した。得られた混合物のpHは、6.5であった。次いで、混合物を大気圧で蒸留して、メタノールを2000グラムの水と置き換えて、20質量パーセントのカチオン性コロイダルシリカ粒子を有するシランで処理したカチオン性コロイダルシリカ分散液を得た。
実施例1に記載されるように調製された(20質量パーセントのシリカ粒子を有する)2500グラムのシランで処理されたカチオン性コロイダルシリカ分散液を、2500グラムの脱イオン水と混合して、10質量パーセントのシリカ粒子を有する5キログラムの希釈分散液を得た。この希釈分散液は、以下のようにアニオンとカチオンとを交換した。5キログラムの試料を、33グラムのDowex(登録商標)550A(OH-)アニオン交換樹脂に通した。得られた分散液のpHは約11であり、導電率は約290μsであった。硝酸でpHを直ちに6.8に調整し、追加の水を添加して、分散液を5質量パーセントのシリカ粒子にさらに希釈した。次いで、この得られた分散液(現在の質量10kg)を、25グラムのDowex(登録商標)650C(H+)カチオン交換樹脂を含有するカラムに直ちに通して、イオン(アニオンおよびカチオン)を交換したシランで処理されたコロイダルシリカ分散液を得た。イオン交換分散液の導電率は約196μsであった。
実施例1(1A)に記載されるように調製されたシランで処理されたカチオン性コロイダルシリカ分散液、および実施例2(2A)に記載されるように調製されたイオン交換された分散液の、ゼータ電位および等電点を測定した。ゼータ電位の測定は、Malvern Instrumentsから入手可能なZetasizerを使用して行われた。結果を表2に示す。
4つの研磨スラリーを調製した。コロイダルシリカの粒径は、各々時間の関数として、評価された。4つの研磨スラリーの各々は、2ミリモルのtrizma(2-アミノ-2-(ヒドロキシメチル)-1,3-プロパンジオール)、0.15質量パーセントのベンゾトリアゾール、125ppmのKordek殺生物剤、および0.5質量パーセントのカチオン性コロイダルシリカ粒子を含んでいた。比較研磨組成物4Aおよび4B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カチオン性コロイダルシリカ粒子を含んでいた。本発明の研磨組成物4Cおよび4Dは、実施例1に記載されるように調製されたカチオン性コロイダルシリカ粒子を含んでいた。研磨組成物4Aおよび4Cは、硝酸を使用してpH7.1に調整した。研磨組成物4Bおよび4Dは、硝酸を使用してpH7.6に調整された。45℃の一定温度で45日間、スラリーを劣化させた。粒径の測定は、Malvern Instrumentsから入手可能なZetasizerを使用して行われた。結果を表3に示す。
カチオン性コロイダルシリカ粒子を使用して、3つのコバルト研磨組成物を調製した。各研磨組成物は、350ppmのベンゾトリアゾール、および7.1のpH(硝酸を使用して調整)で0.5質量パーセントのカチオン性コロイダルシリカを含んでいた。比較研磨組成物5A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カチオン性コロイダルシリカ粒子を含んでいた。本発明の研磨組成物5Bは、実施例1に記載されるように調製されたカチオン性コロイダルシリカを含み、本発明の研磨組成物5Cは、実施例2に記載されるように調製されたカチオン性コロイダルシリカを含んでいた。
Claims (32)
- 化学機械研磨組成物であって、
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金属酸化物研削粒子と、を含み、前記カチオン性金属酸化物研削粒子が、一般式(2)または一般式(3)によって表されるシリル基を含む少なくとも1つの化合物で改質された表面を有し、
-Si(X)n-[L-CR1(OH)-C(R2)2-A]3-n(2)
式中、Xが、同じかまたは異なり、各々が、ヒドロキシル基、加水分解性置換基、非加水分解性置換基、または別のシリル基もしくは前記粒子のO-Siとの結合を表し、
nが、0、1、または2であり、
Lが、連結基であり、
R1が、水素原子、またはアミノ基、ヒドロキシル基、もしくは不飽和結合を含有するアルキル基であり、
R2が、同じかまたは異なり、各々が、水素原子、またはアミノ基、ヒドロキシル基、もしくは不飽和結合を含有するアルキル基を表し、
Aが、第4級アンモニウム基であり、
n’が、0、1、または2であり、
L’が、連結基であり、
A’が、第4級アンモニウム基であり、
前記金属酸化物研削粒子が、約1.5~約5.0の範囲の凝集比を有する、化学機械研磨組成物。 - 前記シリル基が、一般式(2)によって表され、
Lが、--CH2CH2CH2OCH2--であり、R1およびR2が、Hであり、Aが、--N+R’R”R’’’であり、R’、R”、およびR’’’が、同じかまたは異なり、実質的に任意の炭素含有化合物を含む、請求項1に記載の組成物。 - 前記シリル基が、一般式(3)によって表され、
Lが、--CH2CH2--であり、A’が、--N+R’R”R’’’であり、R’、R”、およびR’’’が、同じかまたは異なり、実質的に任意の炭素含有化合物を含む、請求項1に記載の組成物。 - 前記液体キャリアが、水である、請求項1に記載の組成物。
- 前記金属酸化物研削粒子が、シリカ粒子である、請求項1に記載の組成物。
- 前記金属酸化物研削粒子が、約30~約90nmの範囲の平均粒径を有する、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。
- 前記カチオン性金属酸化物研削粒子が、約9超の等電点を有する、請求項1に記載の組成物。
- 前記カチオン性金属酸化物研削粒子が、6超のpHで少なくとも20mVのゼータ電位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金属酸化物研削粒子を含む、請求項1に記載の組成物。
- 前記液体キャリアが、約150ppm未満の総溶解ケイ素濃度を有する、請求項1に記載の組成物。
- 前記液体キャリアが、約100ppm未満の残留シラン濃度を有する、請求項1に記載の組成物。
- 過酸化水素酸化剤および金属腐食抑制剤をさらに含む、請求項1に記載の組成物。
- トリアゾールピリジン化合物をさらに含み、約6~約8の範囲のpHを有する、請求項1に記載の組成物。
- 金属層を含む基板を化学機械研磨する方法であって、
(a)請求項1に記載の研磨組成物と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、前記基板から前記金属層の一部分を除去し、それによって前記基板を研磨することと、を含む、方法。 - 前記金属が、コバルト、銅、およびタングステンのうちの少なくとも1つを含む、請求項15に記載の方法。
- 前記基板が、誘電体層をさらに含み、(c)の前記研削が、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15に記載の方法。
- (c)の前記金属の除去速度対(c)の前記誘電体の除去速度の比が、約3:1~約1:3の範囲である、請求項17に記載の方法。
- 前記金属が、コバルトを含み、(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17に記載の方法。
- 化学機械研磨組成物であって、
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金属酸化物研削粒子と、を含み、前記カチオン性金属酸化物研削粒子が、以下の一般式によって表されるシリル基を含む少なくとも1つの化合物で改質された表面を有し、
-Si(X)n-[L-O-R-A]3-n(1)
式中、Xが、同じかまたは異なり、各々が、ヒドロキシル基、加水分解性置換基、非加水分解性置換基、または別のシリル基もしくは前記粒子のO-Siとの結合を表し、
nが、0、1、または2であり、
Lが、連結基であり、
Oが、酸素ヘテロ原子であり、
Rが、アミノ基、ヒドロキシル基、または不飽和結合を含有するアルキル基であり、
Aが、第4級アンモニウム基であり、
前記液体キャリアが、水であり、前記金属酸化物研削粒子が、約30~約90nmの範囲の平均粒径を有する、化学機械研磨組成物。 - Lが、--CH2CH2CH2--であり、Rが、--CH2CH(OH)CH2--であり、Aが、--N+R’R”R’’’であり、R’、R”、およびR’’’が、同じかまたは異なり、実質的に任意の炭素含有化合物を含む、請求項20に記載の組成物。
- 約6~約8のpHを有し、前記カチオン性金属酸化物研削粒子が、少なくとも20mVのゼータ電位を有するコロイダルシリカ粒子を含む、請求項20に記載の組成物。
- 約2質量パーセント未満の前記金属酸化物研削粒子を含む、請求項20に記載の組成物。
- 前記液体キャリアが、約150ppm未満の総溶解ケイ素濃度を有する、請求項20に記載の組成物。
- 前記液体キャリアが、約100ppm未満の残留シラン濃度を有する、請求項20に記載の組成物。
- 過酸化水素酸化剤および金属腐食抑制剤をさらに含む、請求項20に記載の組成物。
- トリアゾールピリジン化合物をさらに含み、約6~約8の範囲のpHを有する、請求項20に記載の組成物。
- 金属層を含む基板を化学機械研磨する方法であって、
(a)請求項18に記載の研磨組成物と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、前記基板から前記金属層の一部分を除去し、それによって前記基板を研磨することと、を含む、方法。 - 前記金属が、コバルト、銅、およびタングステンのうちの少なくとも1つを含む、請求項28に記載の方法。
- 前記基板が、誘電体層をさらに含み、(c)の前記研削が、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28に記載の方法。
- (c)の前記金属の除去速度対(c)の前記誘電体の除去速度の比が、約3:1~約1:3の範囲である、請求項30に記載の方法。
- 前記金属が、コバルトを含み、(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30に記載の方法。
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CN113166587B (zh) | 2022-05-17 |
US20200172760A1 (en) | 2020-06-04 |
EP3891236A1 (en) | 2021-10-13 |
CN113166587A (zh) | 2021-07-23 |
WO2020117439A1 (en) | 2020-06-11 |
JP7371097B2 (ja) | 2023-10-30 |
TWI757657B (zh) | 2022-03-11 |
EP3891236A4 (en) | 2022-09-07 |
EP3891236B1 (en) | 2024-01-31 |
US10968366B2 (en) | 2021-04-06 |
EP3891236B8 (en) | 2024-03-13 |
TW202026376A (zh) | 2020-07-16 |
KR20210088727A (ko) | 2021-07-14 |
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