WO2009154164A1 - 研磨用組成物及びそれを用いた研磨方法 - Google Patents
研磨用組成物及びそれを用いた研磨方法 Download PDFInfo
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- WO2009154164A1 WO2009154164A1 PCT/JP2009/060848 JP2009060848W WO2009154164A1 WO 2009154164 A1 WO2009154164 A1 WO 2009154164A1 JP 2009060848 W JP2009060848 W JP 2009060848W WO 2009154164 A1 WO2009154164 A1 WO 2009154164A1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
- G11B5/8404—Processes or apparatus specially adapted for manufacturing record carriers manufacturing base layers
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C19/00—Surface treatment of glass, not in the form of fibres or filaments, by mechanical means
-
- 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
-
- 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
Definitions
- the present invention is used for polishing silicon oxide materials, more specifically, for example, glass substrates for hard disks, synthetic quartz substrates for photomasks, silicon dioxide films for semiconductor devices, borophosphosilicate glass (BPSG) films, phosphosilicate glass (PSG).
- the present invention relates to a polishing composition mainly used in applications for polishing low dielectric constant films such as films, fluorosilicate glass (FSG) films, and organic siloxane films, and a polishing method using the same.
- polishing compositions used for polishing silicon oxide materials in order to improve the quality of the silicon oxide material after polishing, the surface roughness of the silicon oxide material after polishing is small and There is a strong demand for silicon oxide materials to have few surface defects such as scratches. Further, in order to shorten the time required for the polishing operation, it is also required that the polishing rate (removal rate) of the silicon oxide material is high.
- the polishing compositions described in Patent Documents 1 to 4 are known as polishing compositions that can be used for polishing silicon oxide materials.
- the polishing composition of Patent Document 1 contains abrasive grains such as colloidal silica and a polymer having a sulfonic acid group such as an acrylic acid / sulfonic acid copolymer.
- the polishing composition of Patent Document 2 includes abrasive grains such as colloidal silica, and a zeta potential adjusting agent comprising an acid, a base, a salt, or a surfactant for adjusting the zeta potential of the abrasive grains to ⁇ 15 to 40 mV. Contains.
- the polishing composition of Patent Document 3 contains colloidal silica having an average primary particle size of 60 nm or less, and the pH is adjusted to 0.5 to 4.
- the polishing composition of Patent Document 4 contains colloidal silica having a degree of association greater than 1 and an acid, and the pH is adjusted to 1 to 4.
- these conventional polishing compositions are insufficient to sufficiently satisfy all the above requirements, and there is still room for improvement.
- an object of the present invention is to provide a polishing composition that can be more suitably used in an application for polishing a silicon oxide material, and a polishing method using the same.
- general formula (1) R 2 —R 1 —SO 3 H (However, R 1 is a linear alkylene or hydroxyalkylene group having 1 to 4 carbon atoms, and R 2 is a hydroxy group, a carboxy group, or a sulfonic acid group when R 1 is a linear alkylene group, , When R 1 is a linear hydroxyalkylene group, it is a carboxy group or a hydroxymethyl group.) Or general formula (2): C 6 H 5 -R 3 (However, R 3 is a sulfonic acid group or a phosphonic acid group.) A polishing composition containing an acid represented by the formula (I) and abrasive grains is provided.
- the acid contained in the polishing composition is preferably isethionic acid or benzenesulfonic acid.
- the polishing composition may further contain a water-soluble polymer.
- a polishing method for polishing a silicon oxide material using the above polishing composition is provided.
- a polishing composition that can be more suitably used in an application for polishing a silicon oxide material, and a polishing method using the same.
- the polishing composition of this embodiment is produced by mixing a specific acid and abrasive grains with water. Accordingly, the polishing composition contains a specific acid, abrasive grains, and water.
- the polishing composition of the present embodiment includes a glass substrate for hard disk, a synthetic quartz substrate for photomask, a silicon dioxide film of a semiconductor device, a BPSG film, a PSG film, an FSG film, and an oxide containing a low dielectric constant film such as an organic siloxane film. Mainly used for polishing silicon material.
- R 2 is a linear alkylene or hydroxyalkylene group having 1 to 4 carbon atoms, preferably 2 or 3 carbon atoms, particularly preferably 2 carbon atoms
- R 2 is R 1 Is a linear alkylene group, it is a hydroxy group (—OH), a carboxy group (—COOH) or a sulfonic acid group (—SO 3 H), and when R 1 is a linear hydroxyalkylene group, Or, it is a hydroxymethyl group (—CH 2 OH).
- the straight-chain alkylene group having 1 to 4 carbon atoms specifically includes a methylene group (—CH 2 —), an ethylene group (—CH 2 CH 2 —), a propylene group (—CH 2 CH 2 CH 2 —). Or a butylene group (—CH 2 CH 2 CH 2 CH 2 —), and the straight-chain hydroxyalkylene group having 1 to 4 carbon atoms is a hydrogen atom in the straight-chain alkylene group having 1 to 4 carbon atoms. Is substituted with a hydroxy group.
- the acid represented by the general formula (1) include isethionic acid (HOCH 2 CH 2 SO 3 H), sulfopropionic acid (HOOCCH 2 CH 2 SO 3 H), sulfopropanediol (HOCH 2 CH (OH)). CH 2 SO 3 H) and ethionic acid (HO 3 SCH 2 CH 2 SO 3 H).
- the specific acid contained in the polishing composition is represented by the general formula (2): C 6 H 5 -R 3 It is an acid represented by However, in the general formula (2), R 3 is a sulfonic acid group (—SO 3 H) or a phosphonic acid group (—PO 3 H 2 ). That is, the acid represented by the general formula (2) is benzenesulfonic acid (C 6 H 5 SO 3 H) or benzenephosphonic acid (C 6 H 5 PO 3 H 2 ).
- the polishing rate of the silicon oxide material by the polishing composition can be greatly increased. This is because the increase in the polishing rate due to the addition of acid does not occur through the corrosion of the silicon oxide material by the acid, but the action of this acid moderates the repulsive force between the abrasive grains and the silicon oxide material. It is presumed that this occurs through the occurrence of moderate aggregation of the abrasive grains.
- the acid represented by the general formula (1) in which R 1 is a linear alkylene group having 2 carbon atoms and R 2 is a hydroxy group, that is, isethionic acid is polished. Since the effect
- the acid represented by the general formula (2) in which R 3 is a sulfonic acid group, that is, benzenesulfonic acid is also a silicon oxide material after polishing with the polishing composition. Since the effect of increasing the surface roughness is weak, it can be particularly suitably used as an acid contained in the polishing composition.
- the content of the acid represented by the general formula (1) or (2) in the polishing composition is preferably 0.001 mol / L or more, more preferably 0.01 mol / L or more, and particularly preferably 0. .015 mol / L or more.
- the content of the acid represented by the general formula (1) or (2) in the polishing composition is 0.001 mol / L or more, more specifically 0.01 mol / L or more or 0.015 mol / L or more. In this case, it becomes easy to improve the polishing rate of the silicon oxide material by the polishing composition to a particularly suitable level for practical use.
- the content of the acid represented by the general formula (1) or (2) in the polishing composition is preferably 3 mol / L or less, more preferably 1 mol / L or less, particularly preferably 0.5 mol. / L or less.
- the content of the acid represented by the general formula (1) or (2) in the polishing composition is 3 mol / L or less, more specifically 1 mol / L or less or 0.5 mol / L or less. This makes it easy to reduce the surface roughness of the silicon oxide material after polishing with the polishing composition to a particularly suitable level for practical use.
- the type of abrasive grains contained in the polishing composition is not particularly limited.
- oxide particles such as silicon oxide, aluminum oxide, titanium oxide, zirconium oxide, cerium oxide, or resin particles are used. be able to.
- silicon dioxide such as colloidal silica and fumed silica can be suitably used when the polishing composition is used for polishing silicon oxide materials, and among these, colloidal silica is particularly preferable.
- colloidal silica can be suitably used when the polishing composition is used for polishing silicon oxide materials, and among these, colloidal silica is particularly preferable.
- the average particle diameter (average primary particle diameter) calculated from the BET specific surface area of the abrasive grains contained in the polishing composition is preferably 1 nm or more, more preferably 5 nm or more, still more preferably 10 nm or more, particularly preferably. Is 13 nm or more.
- the polishing rate of the silicon oxide material by the polishing composition increases.
- the average primary particle diameter of the abrasive grains is 1 nm or more, more specifically 5 nm or more, 10 nm or more, or 13 nm or more, the polishing rate of the silicon oxide material by the polishing composition is brought to a particularly suitable level for practical use. It becomes easy to improve.
- the average primary particle diameter of the abrasive grains contained in the polishing composition is preferably 80 nm or less, more preferably 40 nm or less, still more preferably 30 m or less, and particularly preferably 27 nm or less.
- the surface roughness of the silicon oxide material after polishing with the polishing composition decreases.
- the average primary particle diameter of the abrasive grains is 80 nm or less, more specifically 40 nm or less, 30 m or less, or 27 nm or less, the surface roughness of the silicon oxide material after polishing with the polishing composition is particularly practical. It becomes easy to improve to a suitable level.
- the average particle size (average secondary particle size) obtained by the dynamic scattering method of the abrasive grains contained in the polishing composition is preferably 5 nm or more, more preferably 10 nm or more, and even more preferably 15 nm or more. .
- the polishing rate of the silicon oxide material by the polishing composition increases.
- the average secondary particle diameter of the abrasive grains is 5 nm or more, more specifically 10 nm or more or 15 nm or more, the polishing rate of the silicon oxide material by the polishing composition is improved to a particularly suitable level for practical use. It becomes easy to make.
- the average secondary particle diameter of the abrasive grains contained in the polishing composition is preferably 200 nm or less, more preferably 150 nm or less, still more preferably 100 nm or less, and particularly preferably 60 nm or less.
- the surface roughness of the silicon oxide material after polishing with the polishing composition decreases.
- the average secondary particle diameter of the abrasive grains is 200 nm or less, more specifically 150 nm or less, 100 nm or less, or 60 nm or less, the surface roughness of the silicon oxide material after polishing with the polishing composition is practically used. It becomes easy to improve to a particularly suitable level.
- the value obtained by dividing the value of the average secondary particle size of the abrasive grains contained in the polishing composition by the value of the average primary particle size is preferably 3 or less, more preferably 2.5 or less, Particularly preferably, it is 2 or less. As this value decreases, the surface roughness and the number of scratches of the silicon oxide material after polishing with the polishing composition are reduced.
- the polishing composition It becomes easy to reduce the surface roughness and the number of scratches of the silicon oxide material after polishing with an object to a particularly suitable level for practical use.
- the content of abrasive grains in the polishing composition is preferably 0.1% by mass or more, more preferably 1% by mass or more, and further preferably 3% by mass or more. As the abrasive grain content increases, the polishing rate of the silicon oxide material by the polishing composition increases. In this respect, when the content of the abrasive grains in the polishing composition is 0.1% by mass or more, more specifically, 1% by mass or more, or 3% by mass or more, polishing of the silicon oxide material by the polishing composition It becomes easy to improve the speed to a particularly suitable level for practical use.
- the content of abrasive grains in the polishing composition is preferably 20% by mass or less, more preferably 15% by mass or less, and further preferably 10% by mass or less.
- the slurry stability of the polishing composition improves.
- the content of the abrasive grains in the polishing composition is 20% by mass or less, more specifically 15% by mass or less, or 10% by mass or less, the slurry stability of the polishing composition is particularly practical. It becomes easy to improve to a suitable level.
- the upper limit of the pH value of the polishing composition is not particularly limited, but it is preferably 3 or less when used for polishing a glass substrate for hard disk or a synthetic quartz substrate for photomask, More preferably, it is 2.5 or less, More preferably, it is 2 or less, Most preferably, it is 1.5 or less. As the pH value of the polishing composition decreases, the polishing rate of the glass substrate for hard disk and the synthetic quartz substrate for photomask with the polishing composition increases.
- the polishing composition has a pH of 3 or less, more specifically 2.5 or less, 2 or less, or 1.5 or less, a glass substrate for a hard disk and a synthetic quartz substrate for a photomask made of the polishing composition It becomes easy to improve the polishing rate to a level particularly suitable for practical use.
- the lower limit of the pH value of the polishing composition is not particularly limited, but when used for polishing a glass substrate for hard disk or a synthetic quartz substrate for photomask, the polishing pad may be damaged. In order to reduce it, it is preferably 0.5 or more, more preferably 1 or more.
- an acid or an alkali may be separately added to the polishing composition.
- the acid or alkali used may be any. According to this embodiment, the following advantages are obtained.
- the polishing composition of the present embodiment contains the acid represented by the general formula (1) or (2) and abrasive grains, the silicon oxide material is removed at a high removal rate and polished. Polishing can be performed while reducing the surface roughness and the number of scratches of the material. Therefore, the polishing composition of the present embodiment can be suitably used for the purpose of polishing a silicon oxide material.
- the embodiment may be modified as follows.
- the polishing composition of the embodiment may further contain a water-soluble polymer.
- a water-soluble polymer When the water-soluble polymer is further contained, the surface roughness of the silicon oxide material after polishing with the polishing composition is further reduced.
- water-soluble polymers examples include polystyrene sulfonates, polyacrylates, and polyvinyl acetates, and polystyrene sulfonates such as sodium polystyrene sulfonate can be used particularly preferably.
- the weight average molecular weight of the polystyrene sulfonate is preferably in the range of 1,000 to 5,000,000, more preferably in the range of 10,000 to 2.5 million, and particularly preferably in the range of 500,000 to 2,000,000.
- the polishing composition of the above embodiment may further contain an oxidizing agent.
- oxidants include hydrogen peroxide, peroxide, nitrate, iodate, periodate, hypochlorite, chlorite, chlorate, perchlorate, persulfate , Dichromate, permanganate, ozone water, silver (II) salt, iron (III) salt and the like, and hydrogen peroxide can be particularly preferably used.
- Each of the polishing compositions of the above embodiments may be prepared by diluting a stock solution of the polishing composition with water.
- Examples 1 to 15 and Comparative Examples 1 to 18 polishing compositions were prepared by mixing acid and colloidal silica in water together with a water-soluble polymer as necessary.
- polishing compositions were prepared by appropriately mixing an acid, colloidal silica, and a water-soluble polymer with water. The details of the acid, colloidal silica and water-soluble polymer in the polishing composition of each example, and the results of measuring the pH of the polishing composition of each example are shown in Tables 1 and 2.
- A1 is isethionic acid
- A2 is sulfopropionic acid
- A3 is sulfopropanediol
- A4 is benzenesulfonic acid
- A5 is ethionic acid
- A6 is sulfuric acid
- A7 is nitric acid
- A8 is hydrochloric acid
- A9 is phosphoric acid
- A10 is phosphonic acid
- A11 is citric acid
- A12 is acetic acid
- A13 is formic acid
- A14 is glycolic acid
- A15 is taurine
- A16 is methanesulfonic acid
- A17 is ethanesulfonic acid
- A18 is ethylene glycol
- A19 is p-toluenesulfonic acid
- A20 represents potassium gluconate.
- B1 is colloidal silica having an average primary particle diameter of 16 nm and an average secondary particle diameter of 16 nm
- B2 is colloidal silica having an average primary particle size of 23 nm and an average secondary particle size of 35 nm
- B3 represents colloidal silica having an average primary particle diameter of 30 nm and an average secondary particle diameter of 40 nm.
- C1 is sodium polystyrene sulfonate having a weight average molecular weight of 10,000
- C2 is sodium polystyrene sulfonate having a weight average molecular weight of 500,000
- C3 represents sodium polystyrene sulfonate having a weight average molecular weight of 1,000,000.
- the surface of an aluminosilicate glass substrate for magnetic disk having a diameter of 2.5 inches (about 65 mm) was polished under the conditions shown in Table 3 using the polishing composition of each example, and based on the difference in weight of the substrate before and after polishing.
- the polishing rate was determined. When the determined polishing rate value is 0.059 ⁇ m / min or more, “5”, and when it is 0.046 ⁇ m / min or more and less than 0.059 ⁇ m / min, “4”, 0.033 ⁇ m / min or more and 0.
- the result is evaluated as “3” when less than 046 ⁇ m / min, “2” when less than 0.020 ⁇ m / min and less than 0.033 ⁇ m / min, and “1” when less than 0.020 ⁇ m / min. It is shown in the “polishing rate” column of Tables 1 and 2. Score 4 and score 5, that is, 0.046 ⁇ m / min or more are acceptable levels.
- the surface roughness Ra of the aluminosilicate glass substrate after polishing using the polishing composition of each example was measured using an atomic force microscope “Nanoscope III Dimension 3000” manufactured by Digital Instruments.
- the measured surface roughness Ra is less than 0.60 mm, it is “6”, when it is 0.60 mm or more and less than 0.64 mm, it is “5”, and when it is 0.64 mm or more and less than 0.68 mm.
- the results are shown in the “surface roughness” column of Tables 1 and 2.
- a score of 3 to 6, that is, less than 0.72 mm is a passing level.
- the number of scratches on the surface of the aluminosilicate glass substrate after polishing using the polishing composition of each example was measured using a visual inspection apparatus “Micromax VMX2100” manufactured by Vision Cytec. Tables 1 and 2 show the results evaluated as “3” when the number of scratches measured per surface is less than 10, “2” when 10 or more and less than 20, and “1” when 20 or more. In the “Scratch Count” column. Grade 2 and grade 3, ie less than 20 per face, are acceptable levels.
- Example 21 to 24 the polishing composition was prepared by mixing acid and colloidal silica in water together with a pH adjuster as necessary.
- colloidal silica was mixed with water together with a pH adjuster as necessary to prepare polishing compositions.
- the details of the acid, colloidal silica and pH adjuster in the polishing composition of each example, and the results of measuring the pH of the polishing composition of each example are shown in Table 4.
- A1 in the “Acid type and concentration” column represents isethionic acid
- B4 in the “Colloidal silica type and concentration” column represents colloidal silica having an average primary particle size of 35 nm and an average secondary particle size of 66 nm.
- C1 represents nitric acid
- C2 represents ammonia.
- a 60 mm ⁇ 60 mm small piece was cut out from a silicon substrate having an 8 inch diameter (about 200 mm) provided with a silicon dioxide film, and the surface of the small piece was polished using the polishing composition of each example under the conditions shown in Table 5.
- the polishing rate was determined based on the difference in film thickness on the substrate piece before and after polishing. The results are shown in the “Polishing rate” column of Table 4.
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Abstract
Description
R2-R1-SO3H
(ただし、R1は、炭素数1~4の直鎖アルキレン又はヒドロキシアルキレン基であり、R2は、R1が直鎖アルキレン基の場合にはヒドロキシ基、カルボキシ基又はスルホン酸基であって、R1が直鎖ヒドロキシアルキレン基の場合にはカルボキシ基又はヒドロキシメチル基である。)
又は、一般式(2):
C6H5-R3
(ただし、R3は、スルホン酸基又はホスホン酸基である。)
で表される酸と砥粒とを含有する研磨用組成物が提供される。
本発明の別の態様では、上記の研磨用組成物を用いて、酸化ケイ素材料を研磨する研磨方法が提供される。
本実施形態の研磨用組成物は、特定の酸及び砥粒を水に混合して製造される。従って、研磨用組成物は、特定の酸、砥粒及び水を含有する。本実施形態の研磨用組成物は、ハードディスク用ガラス基板やフォトマスク用合成石英基板、半導体デバイスの二酸化シリコン膜、BPSG膜、PSG膜、FSG膜及び有機シロキサン膜などの低誘電率膜を含む酸化ケイ素材料を研磨する用途で主に使用される。
R2-R1-SO3H
で表わされる酸である。ただし、一般式(1)において、R1は、炭素数1~4、好ましくは炭素数2又は3、特に好ましくは炭素数2の直鎖アルキレン又はヒドロキシアルキレン基であり、R2は、R1が直鎖アルキレン基の場合にはヒドロキシ基(-OH)、カルボキシ基(-COOH)又はスルホン酸基(-SO3H)であって、R1が直鎖ヒドロキシアルキレン基の場合にはカルボキシ基又はヒドロキシメチル基(-CH2OH)である。ここで、炭素数1~4の直鎖アルキレン基とは具体的に、メチレン基(-CH2-)、エチレン基(-CH2CH2-)、プロピレン基(-CH2CH2CH2-)又はブチレン基(-CH2CH2CH2CH2-)であり、炭素数1~4の直鎖ヒドロキシアルキレン基とは、炭素数1~4の直鎖アルキレン基の中の水素原子の一つがヒドロキシ基で置換されたものである。一般式(1)で表わされる酸の具体例としては、イセチオン酸(HOCH2CH2SO3H)、スルホプロピオン酸(HOOCCH2CH2SO3H)、スルホプロパンジオール(HOCH2CH(OH)CH2SO3H)、エチオン酸(HO3SCH2CH2SO3H)が挙げられる。
C6H5-R3
で表される酸である。ただし、一般式(2)において、R3は、スルホン酸基(-SO3H)又はホスホン酸基(-PO3H2)である。すなわち、一般式(2)で表される酸は、ベンゼンスルホン酸(C6H5SO3H)又はベンゼンホスホン酸(C6H5PO3H2)である。
本実施形態によれば、以下の利点が得られる。
前記実施形態の研磨用組成物は、水溶性高分子をさらに含有してもよい。水溶性高分子をさらに含有させた場合には、研磨用組成物による研磨後の酸化ケイ素材料の表面粗さがより一層低減される。使用可能な水溶性高分子としては、ポリスチレンスルホン酸塩、ポリアクリル酸塩、ポリ酢酸ビニルなどが挙げられるが、特に好適に使用されうるのは、ポリスチレンスルホン酸ナトリウムなどのポリスチレンスルホン酸塩である。ポリスチレンスルホン酸塩の重量平均分子量は1千から500万の範囲内であることが好ましく、より好ましくは1万~250万の範囲内、特に好ましくは50万~200万の範囲内である。
前記実施形態の研磨用組成物はそれぞれ研磨用組成物の原液を水で希釈することによって調製されてもよい。
<実施例1~15及び比較例1~18>
実施例1~実施例15では、酸及びコロイダルシリカを、必要に応じて水溶性高分子とともに水に混合して研磨用組成物を調製した。比較例1~比較例18では、酸、コロイダルシリカ及び水溶性高分子を適宜に水と混合して研磨用組成物を調製した。各例の研磨用組成物中の酸、コロイダルシリカ及び水溶性高分子の詳細、並びに各例の研磨用組成物のpHを測定した結果を表1及び表2に示す。
A1は、イセチオン酸、
A2は、スルホプロピオン酸、
A3は、スルホプロパンジオール、
A4は、ベンゼンスルホン酸、
A5は、エチオン酸、
A6は、硫酸、
A7は、硝酸、
A8は、塩酸、
A9は、リン酸、
A10は、ホスホン酸、
A11は、クエン酸、
A12は、酢酸、
A13は、ギ酸、
A14は、グリコール酸、
A15は、タウリン、
A16は、メタンスルホン酸、
A17は、エタンスルホン酸、
A18は、エチレングリコール、
A19は、パラトルエンスルホン酸、
A20は、グルコン酸カリウムを表す。
B1は、平均一次粒子径16nm、平均二次粒子径16nmのコロイダルシリカ、
B2は、平均一次粒子径23nm、平均二次粒子径35nmのコロイダルシリカ、
B3は、平均一次粒子径30nm、平均二次粒子径40nmのコロイダルシリカを表す。
C1は、重量平均分子量が1万のポリスチレンスルホン酸ナトリウム、
C2は、重量平均分子量が50万のポリスチレンスルホン酸ナトリウム、
C3は、重量平均分子量が100万のポリスチレンスルホン酸ナトリウムを表す。
実施例21~実施例24では、酸及びコロイダルシリカを、必要に応じてpH調整剤とともに水に混合して研磨用組成物を調製した。比較例21~比較例24では、コロイダルシリカを、必要に応じてpH調整剤とともに水に混合して研磨用組成物を調製した。各例の研磨用組成物中の酸、コロイダルシリカ及びpH調整剤の詳細、並びに各例の研磨用組成物のpHを測定した結果を表4に示す。
Claims (5)
- 一般式(1):
R2-R1-SO3H
(ただし、R1は、炭素数1~4の直鎖アルキレン又はヒドロキシアルキレン基であり、R2は、R1が直鎖アルキレン基の場合にはヒドロキシ基、カルボキシ基又はスルホン酸基であって、R1が直鎖ヒドロキシアルキレン基の場合にはカルボキシ基又はヒドロキシメチル基である。)
又は、一般式(2):
C6H5-R3
(ただし、R3は、スルホン酸基又はホスホン酸基である。)
で表される酸と砥粒とを含有することを特徴とする研磨用組成物。 - 前記酸がイセチオン酸である請求項1に記載の研磨用組成物。
- 前記酸がベンゼンスルホン酸である請求項1に記載の研磨用組成物。
- 水溶性高分子をさらに含有する請求項1~3のいずれか一項に記載の研磨用組成物。
- 請求項1~4のいずれか一項に記載の研磨用組成物を用いて、酸化ケイ素材料を研磨することを特徴とする研磨方法。
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US8827771B2 (en) | 2014-09-09 |
KR20110034639A (ko) | 2011-04-05 |
CN102105267A (zh) | 2011-06-22 |
MY155495A (en) | 2015-10-30 |
KR101604328B1 (ko) | 2016-03-17 |
EP2324956A4 (en) | 2011-08-03 |
TW201000615A (en) | 2010-01-01 |
JP2015004064A (ja) | 2015-01-08 |
US20110183581A1 (en) | 2011-07-28 |
EP2324956A1 (en) | 2011-05-25 |
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CN102105267B (zh) | 2016-08-03 |
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