WO2006123562A1 - 研磨用組成物の製造方法 - Google Patents
研磨用組成物の製造方法 Download PDFInfo
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- WO2006123562A1 WO2006123562A1 PCT/JP2006/309414 JP2006309414W WO2006123562A1 WO 2006123562 A1 WO2006123562 A1 WO 2006123562A1 JP 2006309414 W JP2006309414 W JP 2006309414W WO 2006123562 A1 WO2006123562 A1 WO 2006123562A1
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- zirconium oxide
- zirconium
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G25/00—Compounds of zirconium
- C01G25/02—Oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/1409—Abrasive particles per se
-
- 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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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
Definitions
- the present invention is obtained by a method for producing a polishing composition containing a zirconium oxide sol obtained by a method in which a zirconium compound such as zirconium carbonate and a hydrate thereof is fired and wet pulverized, and the production method thereof.
- the present invention relates to a method for manufacturing a semiconductor device using the polishing composition.
- Patent Document 2 an abrasive comprising dinorequoia and a polymer acid such as polyacrylic acid.
- an aqueous solution containing a water-soluble zirconium salt such as zinc nitrate, zirconium sulfate, oxysalt and zirconium is neutralized with aqueous ammonia to form a zirconium hydroxide precipitate, which is filtered and washed with water.
- a method of dry calcination or a method of heating and hydrolyzing an aqueous solution of a water-soluble zirconium salt to form a sol and drying and calcining it is known (Non-patent Document 1).
- Non-patent Document 2 a method is also known in which an aqueous solution of a water-soluble zirconium salt is hydrolyzed by heating to form a sol, which is dried and calcined.
- Patent Document 1 JP-A-8-59242 (Claims and Examples)
- Patent Document 2 Japanese Patent No. 3130279 (Claims)
- Patent Document 3 Japanese Patent No. 3278532 (Claims)
- Non-Patent Document 1 New Kelas Series Editorial Committee, Ceramics Fine Powder Technology, pp. 145-153, published in 1994
- Non-patent document 2 Inorganic chemistry (Inorg. Chem.) 3rd edition, 146 pages, 1964 Disclosure of invention
- An aqueous inorganic oxide slurry in which inorganic oxides such as silicon oxide and aluminum oxide are dispersed is a chemical mechanical polishing abrasive for flattening a substrate having an uneven surface in a semiconductor device manufacturing process.
- inorganic oxides such as silicon oxide and aluminum oxide are dispersed
- abrasives that can provide high-quality polished surfaces with high flatness that eliminate surface defects such as scratches.
- zirconium oxide sol is obtained by wet pulverization of a zirconium oxide powder obtained by firing a zirconium compound in an aqueous medium.
- the zirconium oxide sol is oxidized by the type of raw material zirconium compound, the firing method, and the pulverization method.
- the properties of ginoleconum sol are very different.
- CMP chemical mechanical polishing
- An object of the present invention is to provide a method for obtaining a polishing composition containing the same.
- a method for producing a polishing composition containing a zirconium oxide sol wherein the zirconium compound slurry is measured by a laser diffraction method.
- D50 represents a particle size which means that the number of particles less than or equal to this particle size is 50% of the total number of particles.
- the zirconium compound having a compound particle d99 (wherein d99 represents a particle size which means that the number of particles having a particle size smaller than or equal to this particle size is 99% of the total particle number) is 60 ⁇ or less, 400-: a step of firing in a temperature range of 1000 ° C;
- the obtained zinc oxide powder was measured in a water medium, and the zirconium oxide particles measured by laser diffraction method had a d50 of 80 to 150 nm and a zirconium oxide particle d99 of 150.
- a method comprising a wet pulverization step until ⁇ 500 nm,
- the production method according to the first aspect wherein the zirconium compound is zirconium carbonate or a hydrate thereof,
- the firing step is performed by raising the temperature from room temperature at a temperature rise rate of 0.:! To 5 ° CZ until the first stage firing temperature of 200 to less than 400 ° C is reached.
- First stage firing step and 0.1 to: The second stage firing at 400 to 1000 ° C by raising the temperature from the first stage firing temperature at a rate of temperature increase of 10 ° CZ.
- the manufacturing method according to the first aspect or the second aspect which includes a second-stage firing step that continues firing until the temperature is reached,
- the force is a method of performing the second stage firing step immediately, or the first stage firing temperature is within 100 hours.
- the wet milling step is a process in which zirconium oxide powder in an aqueous medium is mixed with (zirconium oxide slurry) pair (the zirconium oxide slurry) using stabilized zirconia crushed beads having a diameter of 0.:! To 3. Omm.
- the wet pulverization step is a process in which zirconium oxide powder in an aqueous medium is mixed with stabilized zirconia pulverized beads having a diameter of 0.03 to 1 mm, a stirring blade having a peripheral speed of 1 to 15 mZ seconds, and a pulverization vessel.
- the flow rate of the dinoleconium oxide slurry into the pulverization vessel is (VZ4 to V) liter / min with respect to the volume V of the pulverization vessel and pulverization
- a semiconductor device characterized in that the polishing composition obtained by the production method according to any one of the first to sixth aspects is used for planarizing a substrate having an uneven surface. Manufacturing method of vice,
- the eighth aspect is the method for manufacturing a semiconductor device according to the seventh aspect, wherein the uneven surface is an uneven surface formed of a copper or copper alloy film.
- the zirconium oxide sol produced by the present invention is used as a polishing agent, and in a process of flattening a substrate having an uneven surface in a semiconductor device manufacturing process, chemical mechanical polishing is performed. Used as a polishing agent.
- a zirconium oxide sol produced from a zirconium oxide powder obtained by the present invention has (1) a polishing agent for a substrate having a concavo-convex surface formed of a copper or copper alloy film (2) As an abrasive for polishing Ta or TaN film formed for the purpose of preventing copper diffusion on the exposed insulating film after flattening the uneven surface formed of copper or copper alloy as described above (3)
- the polishing surface is useful as an abrasive for flattening a substrate having an uneven surface formed by an interlayer insulating film, a low dielectric constant film, and an insulating film in trench isolation. It is also useful as an abrasive for (4) quartz containing silica as a main component, quartz glass for photomasks, and hard disk substrates made of glass.
- the present invention relates to a method for producing a polishing composition containing a zirconium oxide sol, wherein a zirconium compound particle d50 when a zirconium compound slurry is measured by a laser diffraction method (where d50 is a (The particle size means that the number of particles less than the particle size is 50% of the total number of particles.) Is 5 to 25 / im, and d99 of zirconium compound particles (where d99 is this particle size) A particle size which means that the number of particles having a diameter equal to or less than 99% of the total number of particles) is calcined in a temperature range of 400-1 000 ° C. ,
- the zirconium compound used in the present invention is a zirconium carbonate or a hydrate thereof, for example, zirconium carbonate [Zr (CO)], basic zirconium carbonate [ZrCO-Zr
- Zirconium carbonates such as ⁇ ⁇ 8 ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ] and zirconium oxycarbonate [ZrO (C ⁇ )] are preferred.
- zirconium carbonates obtained via zirconium salts can also be used.
- zirconium salt such as zirconium [ZrO (NO) ⁇ 2 ⁇ 0].
- Zirconium carbonate obtained by a method using zirconium oxide obtained through carbon dioxide in a solution, or a method using dinoleconium oxide carbonate obtained through carbon dioxide in a mixed aqueous solution of dinoleconium nitrate and ammonium carbonate is used in the present invention.
- the total content of alkali metal elements and alkaline earth metal elements contained as impurities in zirconium carbonate or its hydrate is preferably less than 1% by weight based on the final zirconium oxide. It is preferable to remove impurities by washing with water at the stage of zirconium carbonate or its hydrate so as to achieve this content.
- This zirconium carbonate and its hydrate are powders that are insoluble in water.
- dinoleconium compounds such as zirconium carbonate and hydrates thereof are characterized by their particle size distribution.
- the slurry obtained by dispersing the dinoreconium compound in an aqueous medium has a d50 of zirconium compound particles of 5 to 25 ⁇ m when measured using a laser diffraction method, and the d99 Use a raw material whose diameter is 60 ⁇ m or less.
- d50 represents a particle size meaning that the number of particles less than or equal to this particle size is 50% of the total number of particles, and d99 indicates that the number of particles less than or equal to this particle size is 99% of the total number of particles. It means the particle size.
- This d50 indicates the value of the average secondary particle size.
- the laser diffraction method is measured by an apparatus such as MASTERSIZER manufactured by MALVERN, for example. In the laser diffraction method, the particle size of particles in a slurry sol is observed, and particles are aggregated. And when there is adhesion, the particle size of these aggregated particles is observed. In the dynamic light scattering method, the particle size of the particles in the sol is also observed, and when there is aggregation or adhesion between particles, the particle size of these aggregated particles is observed.
- the particle diameter converted from the specific surface area value measured by adsorption of nitrogen gas in the dried product obtained by drying the slurry or sol is: An average value of the particle diameter of the individual particles is observed.
- a zirconium compound such as zirconium carbonate having a particle size distribution or a hydrate thereof is calcined.
- the firing treatment is performed at a temperature rising rate of 0.:! To 5 ° C / min from room temperature (usually 20 ° C) until the first stage firing temperature of 200 to less than 400 ° C is reached.
- the first stage firing process that continues firing, and the temperature is raised from the first stage firing temperature at a temperature increase rate of 0.:! To 10 ° C / min. 400 to: temperature of 1000 ° C
- the first stage firing process starts at room temperature (usually 20 ° C), but when using the firing furnace many times, it starts at around 40 ° C, for example, without cooling to room temperature. It is also possible.
- the firing process is a method of performing the second stage firing process immediately after reaching the first stage firing temperature, or after holding within 100 hours in the first stage firing process.
- the method of performing the second stage firing step is used. When it is held in the first firing step, it is kept constant at that temperature.
- the second stage baking step after the second stage baking temperature is reached, the holding is performed within 240 hours, preferably 2 to 48 hours.
- the firing step is performed in a firing furnace by placing the dinoleconium compound in a ceramic container (for example, a mortar).
- a ceramic container for example, a mortar
- a batch type or continuous electric furnace or a gas firing furnace can be used.
- the material of the ceramic container (alarm) include alumina, mullite, mullite cordierite, cordierite.
- the zinc oxide powder obtained by the above firing has a specific surface area value determined by a gas adsorption method.
- the particle diameter in terms of force is 8 to 400 nm, more preferably 8 to 200 nm.
- the half-width of hkl (111) peak of zirconium oxide measured using a powder X-ray diffractometer is preferably 6 to 250 nm. Is 6 to: 150 nm.
- an aqueous dinoleconium oxide slurry is obtained by dispersing dinenoconium oxide powder obtained by firing in an aqueous medium, and this slurry is wet-pulverized to produce a zirconium oxide sol.
- This dispersion can be carried out using a wet pulverizer such as a ball mill, a sand grinder or an attritor, and an optimizer.
- the wet pulverization includes a method using a discontinuous (batch type) pulverizer and a method using a continuous (circulation) pulverizer.
- the zirconium oxide concentration in the dinoleconium oxide slurry is 10 to
- the aqueous oxidation di benzalkonium Niu arm slurry can be adjusted to P H1 ⁇ 6 by addition of an acidic substance.
- these substances include inorganic acids such as nitric acid, sulfuric acid, hydrochloric acid and boric acid, and organic acids such as acetic acid, and an amino acid such as glycine can be added simultaneously to these.
- the aqueous oxidative slurry can be adjusted to pH 7 to 12 by adding a basic substance.
- These basic substances include sodium hydroxide, potassium hydroxide, tetramethylammonium hydroxide, ethanolamine, diethanolamine, triethanolamine, N, N-dimethylethanolamine, methylethanolamine, Examples include monopropanolamine, and ammonia.
- Water-soluble alkali silicates such as ammonium silicate and quaternary ammonium silicate are also included.
- water-soluble alkali carbonates such as quaternary ammonium carbonate can be mentioned.
- dinoleconium oxide powder in an aqueous medium is mixed with stabilized zirconia crushed beads having a diameter of 0.:! To 3. Omm.
- the powder is wet pulverized at a volume ratio of 1: 0.5 to 2.0 (rukoyu slurry) to (the pulverized beads).
- a typical example of a discontinuous (batch type) crusher is a ball mill.
- the wet pulverization step is performed, for example, at a peripheral speed of 15 to 110 m / min for 10 to 100 hours.
- zirconium oxide powder in an aqueous medium is stirred with stabilized zirconia crushed beads having a diameter of 0.03 to lmm and a peripheral speed of 1 to 15 m / sec.
- the flow rate of the zirconium oxide slurry into the crushing vessel is (V / 4 to V) liters Z min.
- wet pulverizing under the condition that the volume ratio of (the zirconium oxide slurry) to (the pulverizing bead) in the pulverization vessel is 1: 0.5 to 0.9.
- the number of circulations is usually 50 to 500 times.
- An aqueous dinoleconium sol can be obtained by wet pulverizing the aqueous dinoleconium oxide slurry.
- the aqueous zirconium oxide sol has a primary particle diameter of zirconium oxide of 8 to 80 nm, more preferably 10 to 60 nm, calculated from the specific surface area obtained by gas adsorption. Further, the d50 (average particle diameter) of zirconium oxide particles measured by the laser diffraction method of this aqueous zirconium oxide sol is in the range of 80 to 150 nm, more preferably 80 to 130 ⁇ m, and the laser diffraction method is used.
- the 99% particle size (d99) calculated from the measured particle size distribution is 150-500 nm, and the particle size measured by laser diffraction method is 1 / im or more, more preferably 0.6 ⁇ or more.
- the zirconium oxide particles are not contained.
- the aqueous zinc oxide sol obtained by the present invention has a recovery rate of 95% or more in the recovered sol excluding the sediment when treated with 2000 G for 1 minute using a centrifuge. At this time, even if zirconium oxide particles in the zirconium oxide sol agglomerate due to centrifugal force to form a coarse precipitate, the ratio is 1 ⁇ m or more in the collected sediment slurry measured by the laser diffraction method. It is a water-based zirconium oxide sol that is essentially 7% by weight or less in terms of the proportion of particles, and is essentially stable even when a large force is applied during polishing.
- the treatment using the centrifuge is performed as follows. First, the aqueous dinoleconium oxide sol obtained by the present invention is prepared so that the solid content concentration of dinoleconium oxide is 20%. 36g of the prepared sol was charged into a centrifuge tube, treated with 2000G for 1 minute in a high-speed cooling centrifuge SRX-201 (manufactured by Tommy Seien Co., Ltd.), the sediment was removed, and aqueous oxidoreconol Collect and weigh the musol.
- SRX-201 manufactured by Tommy Seien Co., Ltd.
- the sediment is re-dispersed with about 30 g of pure water, and its particle size distribution is measured with a laser diffraction particle size analyzer.
- Zirconium oxide sol can be used as a polishing composition as it is, but cationic surfactants such as water-soluble polymers, anionic surfactants, nonionic surfactants, amine-based substances, etc.
- An additive such as an agent and hydrogen peroxide solution can be added to the polishing composition singly or in combination. These additives can be added to the zirconium oxide sol in the form of a compound or an aqueous solution thereof to form a polishing composition.
- water-soluble polymer examples include water-soluble organic compounds containing a carboxyl group or a salt thereof.
- the water-soluble organic compound is a polymer or low-molecular compound having at least one carboxynole group or a salt thereof in the molecule, such as a polymer containing ammonium acrylate and / or ammonium methacrylate (A— 1), and amino acids or their derivatives (A-2).
- water-soluble celluloses such as carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropeno retino reserellose, hydroxy propino resorellose, and dextrin are exemplified.
- (A-1) is an ammonium salt of a polymer of acrylic acid and methacrylic acid.
- These polymers can be homopolymers, copolymers of acrylic acid and methacrylic acid, or copolymers with other polymerizable compounds.
- Other polymerizable compounds include monobasic unsaturated carboxylic acids such as sorbic acid, crotonic acid and tiglic acid, dibasic unsaturated carboxylic acids such as muconic acid, maleic acid, fumaric acid, citraconic acid, mesaconic acid and itaconic acid.
- An acid and the following exemplified acrylates can be used as a copolymerization component.
- acrylic acid ester 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, isobutyl methacrylate, t-butyl methacrylate, isobutyl methacrylate, 2ethyl hexyl methacrylate , Stearyl acrylate, 2-ethyl hexyl carbitol acrylate, 2-methoxy ethyl acrylate, butoxy ethyl acrylate, ethoxy ethoxy ethyl acrylate, methoxy triethylene glycol norate acrylate, methoxy polyethylene glycol acrylate Stearyl metaatrate , Cyclohexyl metatalylate, tetrahydrofurfuryl metatalylate, isobornyl metatalylate, dicyclopentyl acrylate, benzyl acrylate, phenyl glycidyl ether epoxy acrylate, phenoxycetyl meta acrylate,
- the carboxylic acid ammonium and the carboxylic acid ester in the polymer are in the range of 100: 0 to 80:20.
- ammonium polyacrylate is most preferably used as the component (A-1).
- Examples of the component (A-2) include aliphatic amino acids, aromatic amino acids, heterocyclic amino acids, salts thereof, and amino acid surfactants.
- the aliphatic amino acids include monoamino monocarboxylic acids such as glycine, alanine, valine, leucine and isoleucine, oxyamino acids such as serine and threonine, amino acids containing heteroatoms such as cystine, cystine and methionine, Examples include monoamino dicarboxylic acids such as aspartic acid and glutamic acid, and diamino monocarboxylic acids such as lysine and arginine.
- monoamino monocarboxylic acids such as glycine, alanine, valine, leucine and isoleucine
- oxyamino acids such as serine and threonine
- amino acids containing heteroatoms such as cystine, cystine and methionine
- Examples include monoamino dicarboxylic acids such as aspartic acid and glutamic acid, and diamino monocarboxylic acids such as lysine and arginine.
- Aromatic amino acids include phenylalanine, tyrosine and the like.
- Heterocyclic amino acids include histidine, tryptophan, proline, oxyproline and the like.
- amino acid salts examples include salts such as ammonium salts, sodium salts, potassium salts and the like.
- amino acid surfactants include N-substituted amino acids and salts thereof, and examples include N-amino acid amino acids and salts thereof.
- the salt include sodium salt by NaOH, KOH, potassium salt, triethanolamine, and salt by ammonia.
- palm oil fatty acid sarcosine triethanolamine coconut oil fatty acid asilalanin triethanolamine.
- anionic surfactant examples include ammonium oleate, ammonium laurate, triethanolamine lauryl sulfate, and ammonium polyoxyethylene lauryl ether sulfate.
- nonionic surfactant examples include polyoxyethylene lauryl ether, polyoxyethylene sorbitaan monolaurate, polyoxyethylene glycol distearate, and polyethylene glycol monostearate.
- cationic surfactants include hydroxylated quaternary amine, ethanolamine, jetanolamine, triethanolamine, N, N-dimethylethanolamine, methinorethanolamine, monopropanolamine, An aqueous solution of an amine-based substance such as benzotriazole can be mentioned.
- Water-soluble alkali silicates such as ammonium silicate and quaternary ammonium silicate are also included.
- water-soluble alkali carbonates such as quaternary ammonium carbonate such as tetramethyl ammonium carbonate and tetraethyl ammonium carbonate can be mentioned.
- the polishing composition of the present invention contains 0.5 to 10 wt% of zirconium oxide derived from dinoleconium muzonole in the polishing composition, and the above additive contains 100 wt% of zirconium oxide.
- the amount of the additive added to each part is 0.2 to 300 parts by weight, preferably 1 to 200 parts by weight as the solid content.
- the first baking step includes removing a zirconium compound, particularly a component other than a dinoleconium component in zirconium carbonate or its hydrate, by baking to obtain a zirconium oxide or a zirconium oxide precursor. Is to do.
- zirconium whose d50 is 5 to 25 ⁇ m when the slurry is measured by a laser diffraction method and whose d99 is 60 ⁇ m or less is a zirconium compound.
- the first stage baking step of the raw material is carried out at a moderate temperature increase rate to produce dinoleconium oxide having a uniform primary particle size. Therefore, since the coarse particles are not present in the particles in the oxidized powdered powder obtained through the subsequent wet powder process, the polished surface is used when the oxidized powdered powder is used as a polishing composition. No scratches.
- zirconium carbonate or a hydrate thereof does not satisfy the above-mentioned particle size distribution, and especially dinoleconium carbonate or a hydrate thereof containing many large particles is used as a raw material, zirconium oxide after calcination Even if the particle size of the powder is the same as when using the raw materials that meet the above criteria, a longer time of pulverization is required when wet pulverizing to the dinoreconium muzonole stage, As a result, the quality and productivity in which excessively pulverized and unground pulverized materials are easily generated are reduced.
- the oxidized BET method particle size after baking is 85 nm.
- the wet milling time required only 22 hours.
- the oxidized BET-equivalent particle size after baking is 85 nm. Force obtained from the zirconium powder In order to disperse this to the particle size of the zirconium oxide sol of the present invention, a wet grinding time of 75 hours was required. However, the particle size range included many small particles, and there were coarse particles that could not be pulverized.
- zirconium oxide with a small primary particle size is produced when zirconium carbonate or its hydrate changes to zirconium oxide. It is considered a thing.
- Such zirconium oxide is pulverized to a state close to the primary particle diameter generated in the first calcination process in which coarse particles are not generated even after the subsequent calcination process and wet pulverization process.
- the method for producing a polishing composition containing zirconium oxide zonore according to the present invention includes the particle size distribution of zirconium carbonate or a hydrate thereof used in producing oxidized dinoleconium sol.
- a dinoleconium muzonole oxide suitable for a polishing composition is produced. is there.
- a polishing composition containing an aqueous zirconium oxide sol obtained by the present invention is used in a step of flattening a substrate having an uneven surface in a semiconductor device manufacturing step.
- the surface to be polished is copper (Cu) or Flattening a substrate having an uneven surface formed of a copper (Cu) alloy film, a substrate having an uneven surface formed of an interlayer insulating film, a low dielectric constant film, and an insulating film in trench isolation. It is useful as a polishing agent. It is also useful as a polishing agent for quartz containing silica as a main component, stone glass for photomasks, and glass hard disk substrates.
- the average particle size was measured using a laser diffraction particle size measuring device Master Sizer 2000 (MASTERSIZER2000) manufactured by Malvern (MALVERN).
- zirconium oxide density 5. 5g / cm 3
- a compound obtained by firing was identified using a powder X-ray diffractometer (manufactured by Shimadzu Corporation).
- the half-width of the hkl (l 11) peak of zirconium oxide was measured, and the X-ray crystallite diameter was determined by the Debye-Shilla method.
- Measurement was performed using a dynamic light scattering particle size measuring device, trade name DLS6000 (manufactured by Otsuka Electronics Co., Ltd.) average particle size. (7) Measurement of copper film thickness
- the sheet resistance of the copper film was measured using a sheet resistance measuring device, trade name VR-120S (manufactured by Kokusai Denki Alpha Co., Ltd.), and the copper film thickness was calculated using the measured value force equation (2).
- Copper film thickness Copper resistivity P (0 _ 0111) 7 Sheet resistance value ⁇ (073 formula (2)
- the average particle diameter d50 measured by laser diffraction method is 18.
- the 99% particle diameter d99 calculated from the particle size distribution measured by laser diffraction method d99 is 47.7 ⁇ m. conversion to was found to contain 39.0 weight 0/0.) 2800g mullite
- a ball mill apparatus having a polyethylene cylindrical container having a radius of 70 mm and a length of 220 mm was charged with 3800 g of 1 mm diameter partially stabilized zirconia beads.
- Zirconium oxide powder 36 9g, pure water 746g and 10. / ⁇ Nitric acid (5.4 g) was mixed to make a zirconium oxide slurry and charged into a ball mill.
- the volume ratio of (dioxide sodium slurry) to (beads) was 1: 0.8.
- aqueous zirconium oxide sol (a-1) having a zirconium oxide concentration of 23.3 wt%, ⁇ 15.8, and an electric conductivity of 115 i S / cm was obtained.
- the powder obtained by drying this sol at 300 ° C. had a particle diameter in terms of BET method of 19.4 nm.
- the average particle diameter d50 measured by laser diffraction method was 109 nm, d99 was 234 nm, and no zirconium oxide particles having a particle diameter of 0.6 ⁇ m or more were contained.
- the average particle diameter of the aqueous oxide dinoleconium muzonole measured by the dynamic light scattering method was 150 nm.
- the resulting aqueous oxidized dinoleconium sol was treated with 2000G for 1 minute using a centrifuge.
- the recovery rate of zirconium oxide in the recovered sol obtained after removing the sediment was 98.7%.
- the ratio of particles of lzm or larger in the collected sediment slurry measured by laser diffraction method is 6.3. /. Met.
- a ball mill apparatus having a polyethylene cylindrical container having a radius of 70 mm and a length of 220 mm was charged with 3800 g of 1 mm diameter partially stabilized zirconia beads.
- Zirconium oxide powder 369 g, pure water 746 g and 10% nitric acid 3 ⁇ 7 g were mixed to prepare a zirconium oxide slurry and charged into a ball mill apparatus.
- the volume ratio of (dioxide sodium slurry) to (beads) was 1: 0.8.
- This cylindrical container was rotated at 60 rpm for 24 hours to pulverize the dinoleum oxide slurry.
- the beads were separated while being washed with pure water, and an aqueous zirconium oxide sol (b_l) having a zirconium oxide concentration of 24.9 S%, a pH of 4.5, and an electric conductivity of 67 ⁇ S / cm was obtained.
- the powder obtained by drying this sol at 300 ° C. had a particle diameter in terms of BET method of 47.3 nm.
- the average particle diameter d50 measured by laser diffraction method was 105 nm
- d99 was 240 nm
- no zirconium oxide particles having a particle diameter of 0.6 ⁇ m or more were contained.
- the average particle size of the aqueous dinoreconium muzonole measured by dynamic light scattering was 151 nm.
- the resulting aqueous oxidized dinoleconium sol was treated with 2000G for 1 minute using a centrifuge.
- the recovery rate of zirconium oxide in the recovered sol obtained after removing the sediment was 98.3%.
- the ratio of particles of 1 / im or more in the collected sediment slurry measured by the laser diffraction method was 2.5%.
- a ball mill apparatus having a polyethylene cylindrical container having a radius of 70 mm and a length of 220 mm was charged with 3800 g of 1 mm diameter partially stabilized zirconia beads.
- Zirconium oxide powder 36 9g, pure water 746g and 10. / ⁇ 3.7g of nitric acid was mixed to make a zirconium oxide slurry and charged into a ball mill.
- the volume ratio of (dioxide sodium slurry) to (beads) was 1: 0.8.
- This cylindrical container was rotated at 60 rpm for 45 hours to pulverize the dinoleum oxide slurry.
- an aqueous zirconium oxide sol (c_l) having a zirconium oxide concentration of 23.8 fi%, pH 4.6, and electric conductivity of 45 ⁇ S / cm was obtained.
- the powder obtained by drying this sol at 300 ° C had a particle diameter in terms of BET method of 58.7 nm.
- the average particle diameter d50 measured by laser diffraction method was 112 nm, d99 was 262 nm, and no zirconium oxide particles having a particle diameter of 0.6 ⁇ m or more were contained.
- the average particle diameter of the aqueous oxide dinoleconium muzonole measured by a dynamic light scattering method was 17 lnm.
- the obtained aqueous zirconium oxide sol was treated with 2000 G for 1 minute using a centrifuge.
- the recovery rate of zirconium oxide in the recovered sol obtained after removing the sediment was 96.0%.
- the ratio of particles of 1 / im or more in the collected sediment slurry measured by laser diffraction method was 0.3%.
- the average particle size d50 measured by the laser diffraction method is 19.
- the 99% particle size d99 calculated from the particle size distribution measured by the laser diffraction method d99 is 45.7 ⁇ m. Convert to 39. contained 9 weight 0/0.) 2800g mullite
- a high-quality ceramic container was covered with a heat-resistant plate. Dinoconium oxycarbonate hydration Sixty-four ceramic containers charged with the product were fired in an electric furnace with a furnace volume of lm 3 . At this time, the temperature was raised from room temperature to 350 ° C. at a temperature raising rate of 0.5 ° C./min, and kept at 350 ° C. for 5 hours. Further, the temperature was continuously raised to 530 ° C at a rate of 2 ° C / min, held at 530 ° C for 10 hours, and naturally cooled, then the ceramic container was taken out of the electric furnace, and dinoleconium oxide powder 72 kg Got. When this powder was identified with an X-ray diffractometer, it coincided with the characteristic peak of dinoleconium oxide and the X-ray crystallite diameter was 26. Onm. The BET equivalent particle size of this powder was 36. lnm.
- a ball mill apparatus having a polyethylene cylindrical container having a radius of 70 mm and a length of 220 mm was charged with 3800 g of 0.5 mm ⁇ partially stabilized zirconia beads.
- Zirconium oxide powder (369g), pure water (739g) and 10% nitric acid (10.8g) were mixed to prepare a zirconium oxide slurry and charged into a ball mill.
- the volume ratio of (dinoleconium oxide slurry) to (beads) was 1: 0.8.
- This cylindrical container was rotated at 60 rpm for 40 hours to pulverize the dinoleum oxide slurry.
- an aqueous zirconium oxide sol (d-1) having a zirconium oxide concentration of 23.3 wt%, ⁇ 13.9, and electrical conductivity of 209 i S / cm was obtained.
- the powder obtained by drying this sol at 300 ° C. had a particle diameter in terms of BET method of 28.9 nm.
- the average particle diameter d50 measured by laser diffraction was 92 nm, d99 was 177 nm, and no zirconium oxide particles having a particle diameter of 0.6 ⁇ m or more were contained.
- the average particle diameter of the aqueous oxide dinoleconium muzonole measured by a dynamic light scattering method was 80 nm.
- the obtained aqueous zirconium oxide sol was treated with 2000 G for 1 minute using a centrifuge.
- the recovery rate of zirconium oxide in the recovered sol obtained after removing the sediment was 99.6%.
- the collected sediment slurry measured by the laser diffraction method did not contain particles of lzm or more.
- a ball mill apparatus having a polyethylene cylindrical container having a radius of 70 mm and a length of 220 mm was charged with 3800 g of 1 mm diameter partially stabilized zirconia beads.
- Zirconium oxide powder 369 g, pure water 746 g and 10% nitric acid 5.5 g were mixed to prepare a dinoleconium oxide slurry and charged into a ball mill apparatus.
- the volume ratio of (dioxide sodium slurry) to (beads) was 1: 0.8.
- This cylindrical container was rotated at 60 rpm for 37 hours to pulverize the dinoleum oxide slurry.
- an aqueous zirconium oxide sol (e-1) having a zirconium oxide concentration of 21.5 fi 4%, pH 4.9, and electric conductivity of 64 i S / cm was obtained.
- the powder obtained by drying this sol at 300 ° C. had a particle diameter in terms of BET method of 40.4 nm.
- the average particle diameter d50 measured by the laser diffraction method was 118 nm, d99 was 26. It contained 9.3% of acido-dino-reconium particles having a particle diameter of 1 ⁇ m or more.
- the average particle diameter of this aqueous zirconium oxide sol measured by a dynamic light scattering method was 145 nm.
- the resulting aqueous oxidized dinoleconium sol was treated with 2000G for 1 minute using a centrifuge.
- the recovery rate of zirconium oxide in the recovered sol obtained after removing the sediment was 97.2%.
- the ratio of particles of lzm or more in the collected sediment slurry measured by laser diffraction method is 79.3. /. Met.
- Polishing of the adjusted abrasive was performed as follows.
- Abrasive polishing is performed using an independent foam polyurethane resin polishing cloth IC-1400 (manufactured by Kuchi Dale Nitta Co., Ltd.) as the polishing cloth, a copper electrolytic deposition film as the object to be polished, a platen rotation speed of 90 rpm, and a polishing pressure. This was performed using a polishing machine (manufactured by Technolize Co., Ltd.) under the conditions of 174 g / cm 2 and polishing time of 1 minute.
- IC-1400 manufactured by Kuchi Dale Nitta Co., Ltd.
- the polished surface was evaluated visually and with a surface observation device. When a defect was observed, the (X) mark was indicated, and when there was no defect, the ( ⁇ ) mark was indicated.
- the polishing rate was calculated from the calculated film resistance value of the copper film after polishing.
- Comparative Example 1 2 5 0 XX
- the abrasive using the aqueous zinc oxide sol obtained in Comparative Example 1 was used. Compared with, a polishing rate equivalent to or higher was obtained. Further, from the surface observation, scratches were generated in the abrasive of Comparative Example 1, whereas no scratches were generated in the abrasive using the aqueous zirconium oxide of the present invention obtained in Examples 1 to 4. It was.
- aqueous zirconium oxide of the present invention is useful as an abrasive used for chemical mechanical polishing.
- the polishing composition containing the aqueous zirconium oxide sol of the present invention is used as a polishing agent for flat surface polishing in a semiconductor device manufacturing process generally called CMP (Chemical Mechanical Polishing). Suitable for polishing metal wiring such as aluminum, copper and tungsten. It is also suitable as an abrasive used in the element isolation process of semiconductor devices, commonly called STI (Shallow Trench Isolation), and is a siloxane-based, organic polymer-based, porous material-based, CVD polymer. It is also suitable as a polishing agent for polishing low dielectric constant materials for interlayer insulating films of semiconductor devices.
- CMP Chemical Mechanical Polishing
- Suitable for polishing metal wiring such as aluminum, copper and tungsten. It is also suitable as an abrasive used in the element isolation process of semiconductor devices, commonly called STI (Shallow Trench Isolation), and is a siloxane-based, organic polymer-based, porous material-based, CVD polymer. It is also suitable
- siloxane-based materials include hydrogenated silsesquioxane, methyl silsesquioxane, and hydrogenated methyl silsesquioxane.
- organic polymer materials include polyarylene ether, thermopolymerizable hydrocarbon, perfluorohydrocarbon, polyquinoline, and fluorinated polyimide.
- porous materials are xerogel and silica colloid.
- CVD polymer-based materials include diamond-like carbon films, fluorocarbons, aromatic hydrocarbon polymers, and siloxane-based polymers.
- the substrate mainly composed of silica refers to, for example, quartz, quartz glass, glass hard disk, organic film of a semiconductor device, low dielectric constant film, interlayer insulating film, trench isolation CMP, and the like.
- the aqueous zinc oxide zonole oxide of the present invention can be applied to polishing of optical crystal materials such as lithium niobate and lithium tantalate, and ceramic materials such as aluminum nitride, alumina, ferrite and zirconia.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Nanotechnology (AREA)
- Composite Materials (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
Claims
Priority Applications (3)
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JP2007516255A JP5218736B2 (ja) | 2005-05-20 | 2006-05-10 | 研磨用組成物の製造方法 |
US11/920,532 US8323368B2 (en) | 2005-05-20 | 2006-05-10 | Production method of polishing composition |
US12/285,498 US7678703B2 (en) | 2005-05-20 | 2008-10-07 | Production method of polishing composition |
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JP2005-147825 | 2005-05-20 | ||
JP2005147825 | 2005-05-20 |
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US11/920,532 A-371-Of-International US8323368B2 (en) | 2005-05-20 | 2006-05-10 | Production method of polishing composition |
US12/285,498 Division US7678703B2 (en) | 2005-05-20 | 2008-10-07 | Production method of polishing composition |
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WO2006123562A1 true WO2006123562A1 (ja) | 2006-11-23 |
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JP (1) | JP5218736B2 (ja) |
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WO (1) | WO2006123562A1 (ja) |
Cited By (6)
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JP2009297814A (ja) * | 2008-06-11 | 2009-12-24 | Shin-Etsu Chemical Co Ltd | 合成石英ガラス基板用研磨剤 |
WO2012102180A1 (ja) * | 2011-01-27 | 2012-08-02 | 株式会社 フジミインコーポレーテッド | 研磨材及び研磨用組成物 |
JP2013091585A (ja) * | 2011-10-26 | 2013-05-16 | Tosoh Corp | ジルコニア粉末及びその製造方法並びにその用途 |
WO2013146090A1 (ja) * | 2012-03-30 | 2013-10-03 | Hoya株式会社 | 磁気ディスク用ガラス基板の製造方法 |
JP2016052988A (ja) * | 2010-12-28 | 2016-04-14 | サン−ゴバン セラミックス アンド プラスティクス,インコーポレイティド | ジルコニア粒子を含む粒状物 |
CN110256969A (zh) * | 2019-05-29 | 2019-09-20 | 湖南皓志科技股份有限公司 | 一种蓝玻璃精抛液及其配制方法 |
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KR20080016606A (ko) * | 2005-05-20 | 2008-02-21 | 닛산 가가쿠 고교 가부시키 가이샤 | 연마용 조성물의 제조 방법 |
JP4752933B2 (ja) * | 2009-03-03 | 2011-08-17 | 富士ゼロックス株式会社 | インク受容性粒子及びその製造方法、硬化性樹脂分散体 |
JP5310848B2 (ja) * | 2009-06-05 | 2013-10-09 | 株式会社Sumco | シリコンウェーハの研磨方法及びシリコンウェーハ |
JP5035387B2 (ja) * | 2010-05-10 | 2012-09-26 | 住友電気工業株式会社 | 研磨剤、化合物半導体の製造方法および半導体デバイスの製造方法 |
SG192058A1 (en) * | 2011-01-26 | 2013-08-30 | Fujimi Inc | Polishing composition, polishing method using same, and substrate production method |
JP5907081B2 (ja) | 2012-02-02 | 2016-04-20 | 信越化学工業株式会社 | 合成石英ガラス基板の製造方法 |
CN106010298A (zh) * | 2016-06-29 | 2016-10-12 | 上海华明高纳稀土新材料有限公司 | 氧化锆抛光液及其制备方法 |
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- 2006-05-10 JP JP2007516255A patent/JP5218736B2/ja not_active Expired - Fee Related
- 2006-05-10 US US11/920,532 patent/US8323368B2/en not_active Expired - Fee Related
- 2006-05-19 TW TW095117929A patent/TW200712184A/zh unknown
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Also Published As
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JPWO2006123562A1 (ja) | 2008-12-25 |
TW200712184A (en) | 2007-04-01 |
US8323368B2 (en) | 2012-12-04 |
US20090042393A1 (en) | 2009-02-12 |
US7678703B2 (en) | 2010-03-16 |
KR20080016606A (ko) | 2008-02-21 |
JP5218736B2 (ja) | 2013-06-26 |
US20080254718A1 (en) | 2008-10-16 |
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