JP6557273B2 - 複合粒子、その精製方法及び使用 - Google Patents
複合粒子、その精製方法及び使用 Download PDFInfo
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- JP6557273B2 JP6557273B2 JP2017070850A JP2017070850A JP6557273B2 JP 6557273 B2 JP6557273 B2 JP 6557273B2 JP 2017070850 A JP2017070850 A JP 2017070850A JP 2017070850 A JP2017070850 A JP 2017070850A JP 6557273 B2 JP6557273 B2 JP 6557273B2
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- 235000015165 citric acid Nutrition 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- MRUAUOIMASANKQ-UHFFFAOYSA-N cocamidopropyl betaine Chemical compound CCCCCCCCCCCC(=O)NCCC[N+](C)(C)CC([O-])=O MRUAUOIMASANKQ-UHFFFAOYSA-N 0.000 description 1
- 229940073507 cocamidopropyl betaine Drugs 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- SYELZBGXAIXKHU-UHFFFAOYSA-N dodecyldimethylamine N-oxide Chemical compound CCCCCCCCCCCC[N+](C)(C)[O-] SYELZBGXAIXKHU-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 230000002538 fungal effect Effects 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- 229930182478 glucoside Natural products 0.000 description 1
- QFWPJPIVLCBXFJ-UHFFFAOYSA-N glymidine Chemical compound N1=CC(OCCOC)=CN=C1NS(=O)(=O)C1=CC=CC=C1 QFWPJPIVLCBXFJ-UHFFFAOYSA-N 0.000 description 1
- PEYVWSJAZONVQK-UHFFFAOYSA-N hydroperoxy(oxo)borane Chemical compound OOB=O PEYVWSJAZONVQK-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- YWTYJOPNNQFBPC-UHFFFAOYSA-N imidacloprid Chemical compound [O-][N+](=O)\N=C1/NCCN1CC1=CC=C(Cl)N=C1 YWTYJOPNNQFBPC-UHFFFAOYSA-N 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
- 235000011090 malic acid Nutrition 0.000 description 1
- 229960002510 mandelic acid Drugs 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- JPMIIZHYYWMHDT-UHFFFAOYSA-N octhilinone Chemical compound CCCCCCCCN1SC=CC1=O JPMIIZHYYWMHDT-UHFFFAOYSA-N 0.000 description 1
- ZPIRTVJRHUMMOI-UHFFFAOYSA-N octoxybenzene Chemical class CCCCCCCCOC1=CC=CC=C1 ZPIRTVJRHUMMOI-UHFFFAOYSA-N 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 150000001282 organosilanes Chemical class 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- KHIWWQKSHDUIBK-UHFFFAOYSA-N periodic acid Chemical compound OI(=O)(=O)=O KHIWWQKSHDUIBK-UHFFFAOYSA-N 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 150000004965 peroxy acids Chemical class 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- WTJKGGKOPKCXLL-RRHRGVEJSA-N phosphatidylcholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCCCCCCC=CCCCCCCCC WTJKGGKOPKCXLL-RRHRGVEJSA-N 0.000 description 1
- 150000008104 phosphatidylethanolamines Chemical class 0.000 description 1
- 150000003904 phospholipids Chemical class 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920001798 poly[2-(acrylamido)-2-methyl-1-propanesulfonic acid] polymer Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000011165 process development Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 description 1
- 229960002218 sodium chlorite Drugs 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- MWNQXXOSWHCCOZ-UHFFFAOYSA-L sodium;oxido carbonate Chemical compound [Na+].[O-]OC([O-])=O MWNQXXOSWHCCOZ-UHFFFAOYSA-L 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 125000003107 substituted aryl group Chemical group 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000003760 tallow Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- YMBCJWGVCUEGHA-UHFFFAOYSA-M tetraethylammonium chloride Chemical compound [Cl-].CC[N+](CC)(CC)CC YMBCJWGVCUEGHA-UHFFFAOYSA-M 0.000 description 1
- FBEVECUEMUUFKM-UHFFFAOYSA-M tetrapropylazanium;chloride Chemical compound [Cl-].CCC[N+](CCC)(CCC)CCC FBEVECUEMUUFKM-UHFFFAOYSA-M 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- GPRLSGONYQIRFK-MNYXATJNSA-N triton Chemical compound [3H+] GPRLSGONYQIRFK-MNYXATJNSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
Classifications
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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
- 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
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
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- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
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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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
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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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- H01L21/04—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
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/30625—With simultaneous mechanical treatment, e.g. mechanico-chemical polishing
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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
- 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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- 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]
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- H01L21/34—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 not provided for in groups H01L21/0405, H01L21/0445, H01L21/06, H01L21/16 and H01L21/18 with or without impurities, e.g. doping materials
- H01L21/46—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/428
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- H01L21/34—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 not provided for in groups H01L21/0405, H01L21/0445, H01L21/06, H01L21/16 and H01L21/18 with or without impurities, e.g. doping materials
- H01L21/46—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/428
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- H01L21/463—Mechanical treatment, e.g. grinding, ultrasonic treatment
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- Dispersion Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Silicon Compounds (AREA)
- Life Sciences & Earth Sciences (AREA)
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Description
単一セリアコートシリカ粒子及び凝集セリアコートシリカ粒子を含む複合粒子であって、99wt%超の複合粒子が、≦5個、好ましくは≦4個、又はより好ましくは≦2個の単一セリアコートシリカ粒子を含む、複合粒子と、
水とを含み、
pHが、約2〜約12、好ましくは約3.5〜約10、より好ましくは約4〜約7の範囲であり、
任意選択で、
pH調整剤と、
界面活性剤と、
生物成長防止剤とを含む、化学機械平坦化(CMP)研磨組成物である。
a)少なくとも1つの酸化物層を研磨パッドと接触させる工程と、
b)CMP研磨組成物を、少なくとも1つの表面に送る工程と、
c)CMP研磨組成物で、少なくとも1つの酸化物層を研磨する工程と
を含み、CMP研磨組成物が、
単一セリアコートシリカ粒子及び凝集セリアコートシリカ粒子を含む複合粒子であって、99wt%超の複合粒子が、≦5個、好ましくは≦4個、又はより好ましくは≦2個の単一セリアコートシリカ粒子を含む、複合粒子と、
水とを含み、
pHが、約2〜約12、好ましくは約3.5〜約10、より好ましくは約4〜約7の範囲であり、
任意選択で、
pH調整剤と、
界面活性剤と、
生物成長防止剤とを含む、研磨方法である。
少なくとも1つの酸化物層を有する少なくとも1つの表面を含む半導体基材と、
研磨パッドと、
CMP研磨組成物とを含み、少なくとも1つの酸化物層が、研磨パッド及び研磨組成物と接触しており、CMP研磨組成物が、
単一セリアコートシリカ粒子及び凝集セリアコートシリカ粒子を含む複合粒子であって、99wt%超の複合粒子が、≦5個、好ましくは≦4個、又はより好ましくは≦2個の単一セリアコートシリカ粒子を含む、複合粒子と、
水とを含み、
pHが、約2〜約12、好ましくは約3.5〜約10、より好ましくは約4〜約7の範囲であり、
任意選択で、
pH調整剤と、
界面活性剤と、
生物成長防止剤とを含む、化学機械平坦化のためのシステムである。
複合粒子は、一次(又は単一)粒子及び凝集一次(又は単一)粒子を含有する。一次粒子は、コア粒子と、そのコア粒子の表面を被覆する多数のナノ粒子とを有する。
加重平均の平均粒子サイズ=(W1*D1+W2*D2+・・・Wn*Dn)/(W1+W2+・・・Wn)
であり、式中、W1、W2、・・・Wnは、粒子の直径D1、D2、・・・Dnで定義された粒子サイズの階級における粒子の重量分率である。
クラスタの直径=一次粒子の直径×na(式中、n=クラスタ中の一次粒子数であり、1/4<a<1/3である)により与えらるパターンに従う。
精製された凝集粒子は、CMP組成物(又はCMPスラリー、又はCMP配合物)中で、研磨粒子として使用することができる。
HDP:高密度プラズマ(HDP)技術により作られた酸化物膜
SiN膜:窒化ケイ素膜
Å:オングストローム−長さの単位
BP:背圧(psi単位)
CMP:化学機械平坦化=化学機械研磨
CS:キャリア速度
DF:下向きの力:CMP中に適用される圧力(単位psi)
min:分
ml:ミリリットル
mV:ミリボルト
psi:ポンド毎平方インチ
PS:研磨ツールのプラテン回転速度(単位rpm(回転/分))
SF:研磨組成物の流量(ml/分)
除去速度及び除去速度選択性
除去速度(RR)=(研磨前の膜厚−研磨後の膜厚)/研磨時間
Bに対するAの除去速度選択性=(AのRR)/(BのRR)
セリアコートシリカ粒子の20wt%分散体(COPO−20)を、JGC C&Cから得た。透過電子顕微鏡(TEM)での平均直径の測定により測定した場合のコアシリカ粒子の粒子サイズは、およそ100nmであった。平均粒子の直径の測定で測定した場合のセリアナノ粒子のサイズはおよそ13nmであった。
例1で説明したセリア分散体、元のCPOP−20(処理無し)、濾過、及びFARCを使用した後の精製CPOP−20を、CMP配合物中で使用した。
CMPスラリー配合物を生成し、例2で説明したものと同一の方法で試験した。これらの配合物のpHを6に調整した。追加的に、TEOSウエハを、KLA−Tencor製のAIT−XP(商標)欠陥計測ツールで分析した。例2と同様の研磨手順をこれらの試験で使用した。
3つのグループA、B及びCのセリアコートシリカ粒子を、様々な粒子サイズ分布精製技術により得た。セリアコートシリカ粒子は、コアシリカ及びコア粒子を被覆するナノ粒子に関して、同様の複合体粒子の特性を有していた。
CMPスラリー配合物を、例4で説明したように、0.5wt%のセリアコートシリカ粒子A、B及びCを用いて生成した。配合物を、水酸化アンモニウムを使用して5にpH調整した。研磨を、例4で説明した条件のように行った。
CMPスラリー配合物を、例5で説明したように、0.5wt%のセリアコートシリカ粒子Bと、0.1wt%のポリアクリル酸アンモニウム(MW16000〜18000)とを用いて生成した。配合物を、水酸化アンモニウムを使用して6にpH調整した。研磨を、例5で説明した条件のように行った。
Claims (15)
- 単一セリアコートシリカ粒子と、凝集セリアコートシリカ粒子とを含む精製された複合粒子であって、1wt%未満の前記複合粒子が、5個以上の単一セリアコートシリカ粒子を含む凝集セリアコートシリカ粒子である、複合粒子。
- (a)99wt%の前記複合粒子が250nm未満の粒子サイズを有する、
(b)前記複合粒子が150nm未満の平均粒子サイズを有し、前記平均粒子サイズが粒子の直径の加重平均である、及び
(c)それらの組み合わせ
からなる群より選択される特徴を有する、請求項1に記載の複合粒子。 - (a)1wt%未満の前記複合粒子が、4個以上の単一セリアコートシリカ粒子を含む凝集セリアコートシリカ粒子である、
(b)99wt%の前記複合粒子が200nm未満の粒子サイズを有する、
(c)前記複合粒子が125nm未満又は110nm未満の平均粒子サイズを有する、及び
(d)それらの組み合わせ
からなる群より選択される特徴を有する、請求項1又は2に記載の複合粒子。 - (a)1wt%未満の前記複合粒子が、2個以上の単一セリアコートシリカ粒子を含む凝集セリアコートシリカ粒子である、
(b)99wt%の前記複合粒子が200nm未満の粒子サイズを有する、
(c)前記複合粒子が110nm未満の平均粒子サイズを有する、及び
(d)それらの組み合わせ
からなる群より選択される特徴を有する、請求項1〜3のいずれか1項に記載の複合粒子。 - 前記セリアコートシリカ粒子が、単結晶のセリアナノ粒子により被覆された表面を有するアモルファスシリカセリア粒子である、請求項1〜4のいずれか1項に記載の複合粒子。
- 単一粒子及び凝集粒子を含む複合粒子を精製して、粗大凝集体を減らすプロセスであって、(1)濾過;(2)ボウル遠心分離;(3)固定角回転式遠心分離;(4)重力沈降;並びにそれらの組み合わせからなる群より選択される少なくとも1つの工程を含み、
前記単一粒子が、ナノ粒子により被覆された表面を持つコア粒子を含み、
前記コア粒子が、シリカ、アルミナ、チタニア、ジルコニア、ポリマー粒子、及びそれらの組み合わせからなる群より選択され、
前記ナノ粒子が、ジルコニウム、チタン、鉄、マンガン、亜鉛、セリウム、イットリウム、カルシウム、マグネシウム、フッ素、ランタン、ストロンチウムのナノ粒子、及びそれらの組み合わせの化合物からなる群より選択され、
精製した後の1wt%未満の前記複合粒子が、5個以上の単一セリアコートシリカ粒子を含む凝集セリアコートシリカ粒子である、プロセス。 - 前記単一粒子及び前記凝集粒子が、単一セリアコートシリカ粒子及び凝集セリアコートシリカ粒子であり、前記セリアコートシリカ粒子が、単結晶のセリアナノ粒子により被覆された表面を有するアモルファスシリカセリア粒子である、請求項6に記載のプロセス。
- 精製された複合粒子が、
(b)99wt%の前記複合粒子が250nm未満の粒子サイズを有する、
(c)前記複合粒子が150nm未満の平均粒子サイズを有し、前記平均粒子サイズが粒子の直径の加重平均である、及び
(d)それらの組み合わせ
からなる群より選択される特徴を有する、請求項6又は7に記載のプロセス。 - 精製された複合粒子が、
(a)1wt%未満の前記複合粒子が、4個以上の単一セリアコートシリカ粒子を含む凝集セリアコートシリカ粒子である、
(b)99wt%の前記複合粒子が200nm未満の粒子サイズを有する、
(c)前記複合粒子が125nm未満又は110nm未満の平均粒子サイズを有する、及び
(d)それらの組み合わせ
からなる群より選択される特徴を有する、請求項6〜8のいずれか1項に記載のプロセス。 - 請求項1〜5のいずれか1項に記載の0.01wt%〜20wt%の前記複合粒子と、水とを含む、化学機械平坦化(CMP)研磨組成物であって、
pHが2〜12の範囲であり、
任意選択で、
0.0001wt%〜5wt%の、水酸化ナトリウム、水酸化セシウム、水酸化カリウム、水酸化セシウム、水酸化アンモニウム、4級有機水酸化アンモニウム、及びそれらの組み合わせからなる群より選択されるpH調整剤と、
0.000001wt%〜0.5wt%の、有機カルボン酸、アミノ酸、アミドカルボン酸、N−アシルアミノ酸、及びそれらの塩;有機スルホン酸及びそれらの塩;有機ホスホン酸及びそれらの塩;ポリマーカルボン酸及びそれらの塩;ポリマースルホン酸及びそれらの塩;ポリマーホスホン酸及びそれらの塩;アリールアミン、アミノアルコール、脂肪族アミン、複素環アミン、ヒロドキサム酸、置換フェノール、スルホンアミド、チオール、ヒドロキシル基を有するポリオール、並びにそれらの組み合わせからなる群より選択される官能基を有する化合物からなる群より選択される化学添加剤と、
0.0001wt%〜10wt%の、a)非イオン性表面湿潤剤、b)アニオン性表面湿潤剤、c)カチオン性表面湿潤剤、d)両性表面湿潤剤、及びそれらの組み合わせからなる群より選択される界面活性剤と、
0.001wt%〜5wt%の、アニオン性ポリマー、カチオン性ポリマー、非イオン性ポリマー、及びそれらの組み合わせからなる群より選択される水溶性ポリマーと、
0.01wt%〜3.0wt%のキレート剤と、
腐食防止剤と、
酸化剤と、
生物成長防止剤とのうち1つ又は複数を含む、化学機械平坦化(CMP)研磨組成物。 - 3.5〜10のpHを有する、請求項10に記載の化学機械平坦化(CMP)研磨組成物。
- セリアコートシリカ粒子と、15000〜18000の範囲の分子量を有するポリアクリル酸アンモニウムとを含み、4〜7の範囲のpHを有し、1wt%未満の前記複合粒子が、4個以上の単一セリアコートシリカ粒子を含む凝集セリアコートシリカ粒子である、請求項10又は11に記載の化学機械平坦化(CMP)研磨組成物。
- 少なくとも1つの酸化物層を有する少なくとも1つの表面を含む半導体基材の化学機械平坦化(CMP)のための研磨方法であって、
(a)前記少なくとも1つの酸化物層を研磨パッドと接触させる工程と、
(b)請求項10〜12のいずれか1項に記載の前記CMP研磨組成物を前記少なくとも1つの表面に送る工程と、
(c)前記CMP研磨組成物で、前記少なくとも1つの酸化物層を研磨する工程とを含む、研磨方法。 - 前記CMP研磨組成物が、セリアコートシリカ粒子と、15000〜18000の範囲の分子量を有するポリアクリル酸アンモニウムとを含み、4〜7のpHを有し、1wt%未満の前記複合粒子が、4個以上の単一セリアコートシリカ粒子を含む凝集セリアコートシリカ粒子であり、99wt%の前記複合粒子が200nm未満の粒子サイズを有し、前記複合粒子が125nm未満の平均粒子サイズを有する、請求項13に記載の研磨方法。
- 前記半導体基材が窒化物層をさらに含み、前記窒化物層に対する前記少なくとも1つの酸化物層の除去選択性が10超である、及び/又は、前記少なくとも1つの酸化物層がTEOSであり、前記半導体基材が窒化ケイ素層をさらに含み、前記窒化ケイ素層に対する前記TEOSの除去選択性が20超である、請求項13又は14に記載の研磨方法。
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TW201736567A (zh) | 2017-10-16 |
SG10201808500PA (en) | 2018-11-29 |
CN107267118B (zh) | 2022-08-19 |
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US10894906B2 (en) | 2021-01-19 |
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