WO2011112008A2 - 결정성 산화세륨 및 이의 제조 방법 - Google Patents
결정성 산화세륨 및 이의 제조 방법 Download PDFInfo
- Publication number
- WO2011112008A2 WO2011112008A2 PCT/KR2011/001641 KR2011001641W WO2011112008A2 WO 2011112008 A2 WO2011112008 A2 WO 2011112008A2 KR 2011001641 W KR2011001641 W KR 2011001641W WO 2011112008 A2 WO2011112008 A2 WO 2011112008A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cerium oxide
- cerium
- crystalline
- carbonate
- reaction
- Prior art date
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F17/00—Compounds of rare earth metals
- C01F17/20—Compounds containing only rare earth metals as the metal element
- C01F17/206—Compounds containing only rare earth metals as the metal element oxide or hydroxide being the only anion
- C01F17/224—Oxides or hydroxides of lanthanides
- C01F17/235—Cerium oxides or hydroxides
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F17/00—Compounds of rare earth metals
- C01F17/10—Preparation or treatment, e.g. separation or purification
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F17/00—Compounds of rare earth metals
- C01F17/20—Compounds containing only rare earth metals as the metal element
- C01F17/247—Carbonates
-
- 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
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/60—Compounds characterised by their crystallite size
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/30—Particle morphology extending in three dimensions
- C01P2004/38—Particle morphology extending in three dimensions cube-like
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/30—Particle morphology extending in three dimensions
- C01P2004/39—Particle morphology extending in three dimensions parallelepiped-like
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/51—Particles with a specific particle size distribution
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/51—Particles with a specific particle size distribution
- C01P2004/52—Particles with a specific particle size distribution highly monodisperse size distribution
-
- 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
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
Definitions
- the present invention relates to a crystalline cerium oxide and a method for producing the same, more specifically, the crystal structure, shape and size can be easily adjusted, can exhibit excellent polishing properties, economical and efficient through a simple process
- the present invention relates to a crystalline cerium oxide that can be produced and a method for producing the same.
- Cerium oxide is a highly functional ceramic material widely used in catalysts, phosphors, cosmetics, abrasives, and the like, and has recently been spotlighted as a shallow trench isolation (STI) process and optical glass abrasive for semiconductor devices.
- STI shallow trench isolation
- Such cerium oxide can generally be produced by a liquid phase method, a gas phase method, or a solid phase method.
- the liquid phase method is a method for producing cerium oxide directly from cerium salt by adding a pH adjuster such as ammonia to the trivalent or tetravalent cerium salt starting material.
- the method has the advantage of being relatively economical because the raw material cost and equipment cost is relatively low, but it is difficult to control the grain growth because the reaction between the starting materials easily occurs from the nucleation step.
- the vapor phase method is a method of directly producing cerium oxide by vaporizing a cerium metal salt precursor and then combining it with oxygen.
- the method has a problem that the unit cost and equipment cost of the cerium metal salt precursor is expensive and difficult to mass-produce, and is still in the research stage.
- the solid-phase method is a method for producing a cerium oxide by heat-treating the precursor at a high temperature
- the research has been actively made recently, the cerium carbonate-based compound is widely used as a precursor.
- the shape and size of the cerium carbonate-based compound as a precursor act as an important factor for determining the shape and shape of the cerium oxide.
- it can affect the polishing rate, flatness, scratch generation, etc. during the semiconductor CMP process. Therefore, in order to adjust the physical property, shape, etc. of a cerium oxide to a desired range, the manufacturing method of the cerium carbonate type compound which can easily control the kind, shape, etc. of a cerium carbonate type compound is calculated
- cerium salts such as nitrates are not only prepared through complex processes such as crystallization, dissolution, or purification by dissolving cerium salt precursors in various acids, but are also expensive and have an undesirable effect on the efficiency and economics of a cerium oxide manufacturing process.
- cerium oxide is obtained using the cerium carbonate prepared by the synthesis method, physical properties such as polishing properties of the cerium oxide may be insufficient.
- the present invention provides a crystalline cerium oxide and a cerium oxide slurry containing the same, which can be easily controlled in crystal structure, shape and size, exhibit excellent polishing characteristics, and can be economically and efficiently manufactured through a simple process. To provide.
- this invention provides the manufacturing method of the said crystalline cerium oxide.
- the present invention provides a submicron crystalline cerium oxide having a volume average particle diameter of about 70 to 120 nm and a standard deviation of a particle diameter of about 8 to 12.5 nm.
- the present invention provides a cerium oxide slurry containing the crystalline cerium oxide as an abrasive.
- the present invention also comprises the steps of reacting Lanthanite cerium at about 50 ° C. or more to form a cerium carbonate-based compound; Heat-treating the cerium carbonate-based compound to form cerium oxide; And it provides a method for producing crystalline cerium oxide comprising the step of grinding the cerium oxide.
- a method of preparing crystalline cerium oxide, a cerium oxide slurry, and a crystalline cerium oxide according to an embodiment of the present invention will be described in more detail.
- a submicron crystalline cerium oxide having a volume average particle diameter of about 70 to 120 nm and a standard deviation of a particle diameter of about 8 to 12.5 nm is provided.
- the term “submicron” crystalline cerium oxide may be defined as having cerium oxide particles, more specifically, cerium oxide particles constituting crystalline cerium oxide having a particle size of less than about 1, that is, nanoscale. .
- Such “submicron” crystalline cerium oxide includes such fine nano-scale cerium oxide particles, so that it can be used as an abrasive included in the polishing slurry in chemical and mechanical polishing processes (CMP processes), etc. of the device fabrication process.
- CMP processes chemical and mechanical polishing processes
- the standard deviation range of cerium oxide is a low standard deviation that could not be achieved before, and cerium oxide having a fine average particle diameter of such a nanoscale and stratifying the low standard deviation range described above together with None known.
- these crystalline cerium oxides satisfy these properties, they can exhibit a fine and very uniform particle size distribution than previously known, and as a result can exhibit better polishing properties. That is, by using the crystalline cerium oxide of the embodiment as an abrasive in a CMP process, it is possible to implement a better polishing rate, it is possible to greatly reduce the occurrence of scratches in the film to be polished.
- the characteristics of such crystalline cerium oxide are described in more detail as follows.
- the crystalline cerium oxide of the above embodiment may be prepared from a predetermined starting material, for example, lanthanum cerium, and obtained by grinding cerium oxide having certain properties. Specifically, as shown in FIGS. 11 and 12 : the cerium oxide before the pulverization includes a plurality of cerium oxide particles, and on each of the cerium oxide particles a boundary defining a plurality of crystal grains is formed. It is confirmed that each crystal grain exhibits a characteristic of containing at least one cerium oxide crystal. In addition, since the grinding may easily occur along the boundary when the conventional grinding method is applied, it is possible to obtain a crystalline cerium oxide in powder form having a finer and more uniform particle size after grinding.
- a predetermined starting material for example, lanthanum cerium
- the crystalline cerium oxide when it is pulverized, it has a finer particle diameter, for example, about 70 to 12 nm, preferably about 70 to 95 nm, and more preferably about 85 to 95 nm, compared to conventional cerium oxide. It may have a volume average particle diameter.
- such crystalline cerium oxide has a standard deviation of the particle diameter of about 8 to 12.5 nm, preferably about 8.5 to 12.5 nm, more preferably about 9.0 to 12.3 nm, and thus very uniformly unachievable. It is possible to have a particle size.
- the crystalline cerium oxide has a fine and uniform particle diameter, when applied as a slurry of CMP ' slurry, it is possible to realize excellent polishing characteristics and to minimize the occurrence of micro scratches even when applied to a semiconductor process having a narrow line width. You can do it.
- the volume average particle diameter of such crystalline cerium oxide can be measured by a conventional method known before, for example, a laser scattering method, and for this purpose, a particle size measuring instrument LA910 manufactured by Horiba can be used.
- a particle size measuring instrument LA910 manufactured by Horiba can be used.
- the particle size distribution and the standard deviation of the particle diameter of the cerium oxide may also be used.
- the volume average particle diameter and the standard deviation of the particle diameter of the crystalline cerium oxide may be a value measured after grinding the cerium oxide in which the grains and the like are defined using a vertical mill and a horizontal mill.
- a vertical mill and a horizontal mill alone or together, and the two types of mills It is more preferable to apply sequentially to uniformize the particle diameter of cerium oxide and to narrow the particle size distribution.
- the cerium oxide aqueous slurry at a concentration of about 1 to 10% by weight was averaged about ⁇ with a vertical mill (approximately 0.3 mm bead applied, about 300 800 RPM, stirring speed about 1-5 L / min).
- pulverization is carried out until it has a particle diameter, and it grind
- the crystalline cerium oxide includes a plurality of cerium oxide particles before the milling, each cerium oxide particle has a boundary defining a plurality of crystal grains, each of which is one
- the cerium oxide crystals may be included.
- the cerium oxide crystals refer to a single solid phase unit having a structure in which the components constituting cerium oxide are regularly repeated in three dimensions, and such crystals have a specific powder X-ray diffraction pattern as is well known in the art. Can be defined by .
- the crystal grains refer to a fine unit that forms one particle of the cerium oxide and include one or more cerium oxide crystals. That is, each grain may be defined by boundaries formed on or inside the cerium oxide particles. Such grain boundaries and crystal phase boundaries can be observed through electron micrographs (SEM) and the like of crystalline cerium oxide, as also shown in FIG. 11 or 12.
- the cerium oxide is more easily pulverized along these boundaries.
- Crystalline cerium oxide in powder form having a uniform and fine particle size can be obtained.
- Such cerium oxide may exhibit more excellent polishing characteristics as an abrasive of the slurry for CMP due to such a uniform fine particle diameter, and pulverization of the cerium oxide. The process can also be simplified.
- the crystalline cerium oxide may exhibit an appropriate hardness, and when used as an abrasive of the slurry for CMP, may exhibit excellent polishing rate.
- such crystalline cerium oxide not only exhibits excellent polishing properties compared to previously known cerium oxide, but also exhibits excellent polishing rate and the like compared to cerium oxide obtained directly without passing through a cerium carbonate compound from lanthanum cerium.
- the crystalline cerium oxide of one embodiment of the invention may have a volume average particle diameter of about 0.5 ⁇ m to 3 ⁇ m before milling or immediately after the cerium carbonate-based compound is heat treated to produce cerium oxide.
- the crystalline cerium oxide has such an average particle diameter in the dispersed state before grinding, it is possible to obtain a cerium oxide powder having a uniform particle diameter through a simple grinding process.
- the grains defined on the cerium oxide particles before grinding may have a size of about 20 to 300 nm, preferably about 40 to 200 nm, and each cerium oxide crystal contained in such grains Silver may have a crystal size of about 10 to 200 nm, preferably about 20 to 100 nm. More specifically, such grains or crystal sizes may be adjusted according to the crystal structure of the cerium carbonate-based compound used to prepare cerium oxide. For example, in a cerium carbonate compound having a tetragonal crystal structure, that is, a cerium oxide obtained from a tetragonal cerium oxycarbonate hydrate, the grain size may be approximately 50 to 130 nm, and the cerium carbonate system having a hexagonal crystal structure. In the compound, ie, cerium oxide obtained from hexagonal cerium hydroxy carbonate, the grain size may be approximately 60 to 200 nm.
- the cerium oxide may be pulverized to obtain a crystalline cerium oxide having a more uniform and finer particle diameter, which may be used as an abrasive of a slurry for CMP to implement excellent polishing characteristics.
- a slurry for CMP including the crystalline cerium oxide of the above-described embodiment as an abrasive may be provided. Since the crystalline cerium oxide has a uniform and fine particle diameter and narrow particle size distribution, The slurry for CMP may implement excellent polishing properties. For example, such a slurry for CMP can exhibit a better polishing rate and can reduce the occurrence of scratches on the film to be polished.
- the slurry for CMP may further include a dispersant and a pH adjusting agent.
- a dispersant a nonionic polymer dispersant or an anionic polymer dispersant may be used.
- the nonionic polymer dispersant is at least one selected from the group consisting of polyvinyl alcohol (PVA), ethylene glycol (EG), glycerin, polyethylene glycol (PEG), polypropylene glycol (PPG), and polyvinyl pyridone (PVP).
- the anionic polymer dispersant may be selected from one or more selected from the group consisting of poly acrylic acid, poly ammonium salt, and poly acrylic maleic acid.
- the present invention is not limited thereto, and a dispersant known to be applicable to a cerium oxide slurry for CMP may be used without particular limitation.
- the dispersant may be included in an amount of about 0.001 to 10 parts by weight, more preferably about 0.02 to 3.0 parts by weight, based on 100 parts by weight of cerium oxide.
- the content of the dispersant is less than about 001 parts by weight, the dispersing force is low, so that the precipitation proceeds quickly, so that precipitation occurs during transport of the polishing liquid, and thus the supply of the abrasive is not uniform.
- the amount exceeds about 10 parts by weight, a thick layer of dispersant polymer, which acts as a cushion, is formed around the abrasive particles, which makes it difficult to contact the surface of the abrasive, resulting in a low polishing rate.
- the CMP slurry is preferably titrated to pH 6 to 8 after mixing cerium oxide and a dispersant in water.
- the cerium oxide slurry may further include a pH adjusting agent.
- pH adjusting agents may include basic pH adjusting agents such as potassium hydroxide, sodium hydroxide, aqueous ammonia, sodium hydroxide, cesium hydroxide, sodium bicarbonate or sodium carbonate, or acidic pH adjusting agents such as hydrochloric acid, nitric acid, sulfuric acid, phosphoric acid, formic acid or acetic acid.
- the applicable pH adjusting agent is not limited thereto, and the cerium oxide slurry composition may be Applicable pH adjusting agents can be used without particular limitation.
- the pH adjusting agent may be used by those skilled in the art in consideration of the appropriate pH of the slurry composition to be adjusted.
- the dispersion stabilization process may use dispersion equipment known to those skilled in the art.
- the dispersion stabilization process may be performed under conditions of about 1000 to 5000 ml / min of dispersion rate and about 300 to 800 rpm of bead stirring rate.
- the dispersion stabilization process can be carried out under the conditions of a feed rate of about 5000 ⁇ 17000ml / min and a bead stirring speed of about 400 ⁇ 1200rpm. Only by carrying out the simplification of the grinding process under such conventional conditions, it is possible to obtain an abrasive comprising a powder of cerium oxide having a more uniform and fine particle diameter and a slurry for CMP containing the same.
- the category of the cerium carbonate compound includes a cerium carbonate compound having a tetragonal crystal structure, that is, a tetragonal cerium oxycarbonate hydrate (Ce 2 0 (C0 3 ) 2 ⁇ 3 ⁇ 40) and a carbonate having a hexagonal crystal structure Cerium-based compounds, ie hexagonal cerium hydroxy carbonates (Ce (OH). (C0 3 )) can be encompassed.
- a generally known method for producing a cerium carbonate compound is to prepare a cerium carbonate compound by reacting cerium salts such as cerium nitrate and urea in a solvent.
- cerium salts such as cerium nitrate and urea
- urea is thermally decomposed into ammonia or its ammonium salt and carbon dioxide or its carbonate, and the carbon dioxide or carbonate generated therein reacts with the cerium salt or cerium ion derived therefrom.
- a cerium carbonate compound which can be used as a precursor of cerium oxide can be prepared.
- a cerium carbonate compound of cerium oxycarbonate hydrate (Ce 2 0 (C0 3 ) 2 ⁇ 3 ⁇ 40) having a tetragonal crystal structure can be obtained.
- Cerium salts or cerium ions are partially hydrolyzed and then participate in the reaction, thereby obtaining cerium hydroxy carbonate (Ce (OH). (C0 3 )) having a hexagonal crystal structure.
- a compound having a certain crystal structure is used as a precursor. It is known that the physical properties, the shape, and the like of the cerium oxide obtained from the cerium carbonate-based compound vary depending on the use, or the size, shape or content of such a precursor compound.
- the present inventors can obtain a cerium carbonate compound having a controlled crystal structure, shape, and type when the lanthanum cerium is reacted under specific conditions.
- the cerium carbonate compound is heat treated and pulverized, conventional oxidation
- Experiments confirmed that it was possible to produce a crystalline cerium oxide of one embodiment having a more uniform and finer particle diameter and a lower standard particle size than the cerium, and completed the invention.
- the manufacturing method of another embodiment of the present invention there is no danger or problem of removing by-products occurring in the conventional process using the precipitant or the excess solvent, and using expensive raw materials or reaction conditions of high temperature and high pressure. There is no need to apply this to improve the efficiency and economics of the process.
- the crystalline cerium oxide prepared according to one embodiment of the present invention has an appropriate particle shape, size, and narrow particle size distribution, when used as an abrasive for a slurry for CMP, it is possible to realize excellent polishing characteristics. Even when applied to the semiconductor process of the line width, it is possible to minimize the occurrence of micro scratches.
- tetragonal cerium oxycarbonate hydrate Ce 2 0 (C0 3 ) cerium carbonate-based compounds including 2 ⁇ 3 ⁇ 40
- hexagonal cerium hydroxy carbonates Ce (OH) ⁇ (C0 3 )
- the cerium carbonate compound can be easily adjusted by controlling the crystal structure, size or shape of the cerium carbonate compound without fear of excessive increase in reaction pressure. You can get it.
- the lanthanum cerium is a kind of known cerium compound represented by the formula (Ce, La) 2 (C0 3 ) 3 ⁇ 8 (H 2 0), and is known to be available in nature.
- Cerium salts such as cerium nitrate, which have previously been used for the preparation of cerium carbonate compounds, are obtained by using such lanthanum cerium as starting materials, dissolving it in an acid, and performing a process such as crystallization and purification. For this reason, the cerium salt is usually higher in cost than lanthanum cerium.
- cerium carbonate-based compound can be directly obtained from lanthanum cerium instead of cerium salts such as cerium nitrate, which is relatively expensive, it is more economically and efficiently used as a precursor of cerium oxide.
- Usable cerium carbonate compounds can be prepared.
- the reaction of the lanthanum cerium may proceed without a separate medium, it is preferable to proceed in a liquid medium. Since lanthanum cerium is present in the form of a hydrate, water molecules in the molecule may act as a reaction medium during the reaction, but the reaction of the lanthanum cerium in the liquid phase may be more effective. It is preferable to increase.
- the liquid medium may be any solvent or organic solvent capable of dissolving or dispersing lanthanum cerium.
- the kind of the liquid medium is not particularly limited, but a water-soluble solvent including alcohol, DMSO, DMF, or the like that can be mixed with water or water can be used.
- a water-soluble solvent including alcohol, DMSO, DMF, or the like that can be mixed with water or water can be used.
- the reaction of the lanthanum cerium is carried out at a weight ratio of lanthanum cerium: liquid medium of about 1: 0.5 to 1:20, preferably about 1: 1 to 1:10, more preferably about 1: 2 to 1: 9. It can proceed in the amount of the liquid medium.
- the lanthanum cerium When the amount of the liquid medium is too small compared to the lanthanum cerium, the lanthanum cerium may not be dissolved or dispersed properly, which may adversely affect the reaction, and it may be difficult to add the reaction product to the reaction.
- the reaction of the lanthanum cerium is a process in which crystals of the cerium carbonate compound are formed by particles dispersed or dissolved in a liquid medium.
- the cerium carbonate compound has non-uniform characteristics. Compounds may be formed. Conversely, if the amount of liquid medium is too large, it may not be desirable for productivity.
- the lanthanide by nitro CE banung at about 50 ° C or more temperature, acid shale ryumgye compounds, for example, orthorhombic cerium oxy-hydrate (Ce 2 0 (C0 3) 2 ⁇ H 2 0), the hexagonal cerium Hydroxy carbonate (Ce (OH). (C0 3 )) or a combination thereof.
- acid shale ryumgye compounds for example, orthorhombic cerium oxy-hydrate (Ce 2 0 (C0 3) 2 ⁇ H 2 0), the hexagonal cerium Hydroxy carbonate (Ce (OH). (C0 3 )) or a combination thereof.
- the reaction temperature of the lanthanum cerium may be about 50 to 300 ° C. When the reaction temperature is less than about 50 ° C. the reaction time is longer, productivity may be lowered. Conversely, if the reaction temperature is too high, lanthanum cerium can be directly converted to cerium oxide without going through a cerium carbonate-based compound step, and this cerium oxide has a very wide particle size distribution, which is not suitable for application to slurry for CMP. In addition, if the reaction temperature is too high, high vapor pressure is generated by the solvent used in the reaction, which further increases the pressure of the reaction system. The risk of accidents can result.
- the production method according to another embodiment of the present invention it is possible to easily adjust the crystal structure, size or shape of the cerium carbonate-based compound as a reaction product by adjusting the reaction conditions of the lanthanum cerium.
- cerium carbonate-based compounds having different crystal structures, that is, tetragonal systems
- the degree of formation of cerium oxycarbonate hydrate (Ce 2 0 (C0 3 ) 2 ⁇ 3 ⁇ 40) or hexagonal cerium hydroxy carbonate (Ce (OH) ⁇ (C0 3 )) can be controlled.
- the reaction of the lanthanum cerium is carried out at a temperature of about 50 or more and less than 110 ° C., so that at least about 50% by volume or more of tetragonal cerium oxycarbonate hydrate (Ce 2 0 (C0 3) in the total cerium carbonate compound. ) Cerium carbonate-based compound including 2 'H 2 0) can be formed.
- the reaction time is shortened, or the weight ratio of lanthanum cerium: liquid medium is less than about 1: 5, preferably about 1: 0.5 or more 1:
- the liquid medium may be used to form a cerium carbonate compound including at least about 50% by volume of tetragonal cerium oxycarbonate hydrate (Ce20 (C03) 2.H20) in the total cerium carbonate compound.
- the reaction of the lanthanum cerium proceeds at a temperature of about 110 ⁇ 300 ° C
- Cerium carbonate system containing hexagonal cerium hydroxy carbonate (Ce (OH) (C03)) Compounds may be formed, and the degree of formation of the hexagonal cerium hydroxy carbonate (Ce (OH). (C03)) may be controlled by adjusting various conditions such as reaction temperature or reaction time within the silver range.
- the reaction of the lanthanum cerium is carried out at a temperature above about 130 and below 300 ° C., so that at least about 50% by volume of hexagonal cerium hydroxy carbonate (Ce (OH) Cerium carbonate-based compounds including C03)).
- the reaction time is relatively long, or the increase ratio of lanthanum cerium: liquid medium is about 1: 5 or more
- Compounds can be formed.
- various cerium carbonate-based compounds having a desired crystal structure, size, or shape can be easily prepared, thereby obtaining a cerium oxide having desired physical properties, shapes, or sizes. Can be.
- the pressure at which the reaction of the lanthanum cerium proceeds is not particularly limited.
- the lanthanum cerium may be operated under normal pressure (about lbar) to 100 bar.
- the pressure at this time means the pressure of the reaction system when the reaction of the lanthanum cerium is started.
- the reaction of the lanthanum cerium may be performed for about 0.5 to 100 hours, preferably 0.5 to 48 hours.
- the lanthanum cerium is heated to react with a cerium carbonate-based compound which can be used as a precursor of cerium oxide, for example, tetragonal cerium oxycarbonate hydrate (Ce 2 0 (C0 3 ) 2 ⁇ 3 ⁇ 40) or hexagonal system Cerium hydroxy carbonate (Ce (OH). (C0 3 )) can be obtained in an excellent yield, and it is possible to suppress formation of by-products such as cerium oxide having poor properties due to an excessively long reaction time.
- the step of forming the cerium carbonate-based compound may further comprise the step of drying the reaction product.
- the liquid medium such as lanthanum cerium and water
- no additional washing step is required after the reaction is completed, and the result of the heating process may be immediately dried. Therefore, in one embodiment of the invention, the problems caused by the waste water, waste liquid that may occur in the washing step or reaction reaction will not occur.
- the cerium carbonate-based compound may be heat treated at about 300 to 1500 ° C, to form cerium oxide.
- the heat treatment may be by a method commonly known in the manufacture of cerium oxide. And, it may include the step of heat treatment for about 30 minutes to 4 hours at about 300 ° C to 1500 ° C, about 350 ° C to 1000 ° C, or about 400 ° C to 1000 ° C.
- the heat treatment temperature is too low or the heat treatment time is short, the crystallinity of the cerium oxide may be lowered, and thus may not exhibit a desired polishing performance such as a desirable polishing rate when used as an abrasive of the slurry for CMP.
- the crystalline cerium oxide obtained by the manufacturing method of another embodiment of the invention comprises a plurality of cerium oxide particles, and on each cerium oxide particle a boundary defining a plurality of crystal grains is formed.
- Each grain was found to exhibit novel crystalline properties, including one or more cerium oxide crystals. This is a distinctive feature from which no boundary and no crystal grains defined by the cerium oxide particles obtained by the previous method are observed.
- crystalline cerium oxide comprising a plurality of cerium oxide particles having a boundary defining a plurality of crystal grains is formed. You can get it.
- a vertical mill and a horizontal mill may be applied alone or together.
- the two types of mills are applied sequentially to make the cerium oxide uniform in particle size and narrow in particle size distribution. It is preferable to.
- Order of application of the vertical mill (mill) and a horizontal mill (mill) may be any person skilled in the art to appropriately regulated in consideration of the characteristics of the crushing "condition or abrasive particles.
- cerium oxide powder having a more uniform and finer particle size can be obtained.
- a crystalline cerium oxide and a method for producing the same which can be easily controlled in crystal structure, shape and size, exhibit excellent polishing properties, and can be economically and efficiently produced through a simple process. do.
- FIG. 1 is an electron micrograph of a cerium carbonate compound prepared in Example 1.
- FIG. 2 is an electron micrograph of a cerium carbonate compound prepared in Example 2.
- FIG. 3 is an electron micrograph of a cerium carbonate compound prepared in Comparative Example 1.
- FIG. 4 is an electron micrograph of a cerium carbonate compound prepared in Comparative Example 2.
- FIG. 5 is an electron micrograph of a cerium carbonate compound prepared in Example 3.
- FIG. 6 is an electron micrograph of a cerium carbonate compound prepared in Example 4.
- FIG. 8 is an electron micrograph of cerium oxide prepared in Example 1.
- FIG. 9 is an electron micrograph of cerium oxide prepared in Comparative Example 1.
- FIG. 10 is an electron micrograph of the cerium oxide prepared in Example 3.
- FIG. 11 is an electron micrograph of cerium oxide before milling in Example 1.
- the cerium carbonate compound was heat-treated at 900 degrees in a rotary kilin rotary rotary furnace to obtain cerium oxide.
- Example 3 Preparation of Cerium Carbonate Compound and Cerium Oxide
- a cerium carbonate-based compound and cerium oxide were obtained in the same manner as in Example 1 except that the reactor was maintained at 80 ° C. for 24 hours. Comparative Example 1: Preparation of Cerium Carbonate Compound and Cerium Oxide
- Cerium nitrate second aqueous solution were dissolved in distilled water 32kg to which the first aqueous solution and the precipitating agent is urea 35kg dissolved in distilled water 32kg to 69kg at room temperature at room temperature in which the heunhap In the half unggi then heated the reactor to 180 ° C 2 sigan The reaction was over.
- the resultant was transferred to another vessel to remove the supernatant, and distilled water was added and stirred by the removed amount. The supernatant was removed, distilled water was added and stirred to wash the ionic conductivity below 1ms. After the washing was completed, it was dried with a spray dryer to obtain a cerium carbonate compound.
- the cerium carbonate compound was heat-treated at 900 degrees in a rotary kilin rotary rotary furnace to obtain cerium oxide.
- the cerium carbonate compound was heat-treated at 900 degrees in a rotary kilin rotary rotary furnace to obtain cerium oxide.
- Lanthanum cerium was heat-treated at 900 degrees in rotary kilin, a rotary continuous furnace, to obtain cerium oxide.
- cerium carbonate-based compound and cerium oxide obtained in Examples 1 to 4 and Comparative Examples 1 to 3 were subjected to XRD analysis and SEM analysis to confirm crystal structure and shape.
- Bruker D4 Endeavor was used for XRD analysis and HITACHI S-4800 for SEM analysis.
- FIGS. 8 and 10 are electron micrographs of crystalline cerium oxide after milling prepared in Examples 1 and 3, respectively, and FIG. 9 is an electron micrograph of cerium oxide prepared in Comparative Example 1.
- FIG. 8 and 10 are electron micrographs of crystalline cerium oxide after milling prepared in Examples 1 and 3, respectively, and FIG. 9 is an electron micrograph of cerium oxide prepared in Comparative Example 1.
- the crystalline cerium oxides of Examples 1 and 4 contain a plurality of cerium oxide particles before grinding, and each of the cerium oxide particles has a plurality of crystal grains ( It was found that a boundary was defined to define crystal grains, and each grain contained one or more cerium oxide crystals.
- the crystalline cerium oxide of the above example has a finer and more uniform particle size after grinding along these grains and boundaries. It was confirmed that more uniform grinding is achieved.
- the crystal size of cerium oxide was measured by the Rietveld method through XRD measurement, the average particle size was measured using Horiba's particle size measuring device LA910 using a laser scattering method.
- the particle size distribution and the standard deviation were also measured using a LA910 manufactured by Horiba.
- the shape of the cerium carbonate compound and the like can be easily adjusted. It can be obtained.
- a very uniform and fine cerium oxide powder specifically 70 to 120 nm, preferably 70 to 95 nm, more preferably 85 to 95 nm It was confirmed that a crystalline cerium oxide having a volume average particle diameter and a standard deviation of the particle diameter of 8 to 12.5 nm can be obtained.
- Comparative Examples 1 to 3 it was confirmed that even in the case where the pulverized grinding was carried out and the volume average particle diameter appeared relatively fine, cerium oxide having a nonuniform particle size was obtained due to a large standard deviation.
- the slurry for CMP (combination of cerium oxide, dispersant and distilled water) prepared in Examples 1 to 4 and Comparative Examples 1 to 3 was subjected to polishing evaluation in POLI 500 Polisher, and the results are shown in Table 2. After polishing, the number of scratches on the film to be polished was confirmed by CS10 equipment of KLA PENCO Co., Ltd., and the number of scratches was calculated from scratches of defects of 300 nm or more in length.
- the cerium oxide powders included in Examples 1 to 4 have more uniform particle diameters (narrow particle size distribution and small standard deviation), which was confirmed through the particle size distribution derived from the above-described average particle size measurement process.
- the cerium oxide powder of Examples 1-4 has a more uniform particle diameter.
- grinding is performed along these boundaries, and even more uniform grinding can be achieved by the same grinding process. see.
- Comparative Example 3 using the cerium oxide prepared immediately from lanthanum cerium, it was confirmed that the particle size distribution of the cerium oxide powder after grinding was not uniform, and the slurry for CMP containing the same showed a relatively poor polishing rate.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Nanotechnology (AREA)
- Inorganic Chemistry (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Composite Materials (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Analytical Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012556979A JP2013522151A (ja) | 2010-03-09 | 2011-03-09 | 結晶性酸化セリウム及びその製造方法 |
CN201180023381.XA CN102884002B (zh) | 2010-03-09 | 2011-03-09 | 晶体氧化铈及其制备方法 |
EP11753613.6A EP2546198A4 (en) | 2010-03-09 | 2011-03-09 | CRYSTALLINE CERIUM OXIDE AND PROCESS FOR PREPARING THE SAME |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20100021004 | 2010-03-09 | ||
KR10-2010-0021004 | 2010-03-09 | ||
KR1020110020559A KR101075966B1 (ko) | 2010-03-09 | 2011-03-08 | 결정성 산화세륨 및 이의 제조 방법 |
KR10-2011-0020559 | 2011-03-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2011112008A2 true WO2011112008A2 (ko) | 2011-09-15 |
WO2011112008A3 WO2011112008A3 (ko) | 2012-01-12 |
Family
ID=44954040
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2011/001641 WO2011112008A2 (ko) | 2010-03-09 | 2011-03-09 | 결정성 산화세륨 및 이의 제조 방법 |
Country Status (6)
Country | Link |
---|---|
US (1) | US8703085B2 (ko) |
EP (1) | EP2546198A4 (ko) |
JP (2) | JP2013522151A (ko) |
KR (1) | KR101075966B1 (ko) |
CN (1) | CN102884002B (ko) |
WO (1) | WO2011112008A2 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115974127A (zh) * | 2022-11-25 | 2023-04-18 | 深圳市聚芯半导体材料有限公司 | 类球形纳米二氧化铈及其悬浮液、制备方法和应用 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
MY171383A (en) * | 2012-05-25 | 2019-10-10 | Nissan Chemical Ind Ltd | Polishing liquid composition for wafers |
CN106029572B (zh) * | 2013-12-16 | 2018-03-20 | 罗地亚经营管理公司 | 氧化铈颗粒的液体悬浮液 |
JP2015120844A (ja) * | 2013-12-24 | 2015-07-02 | 旭硝子株式会社 | 研磨剤の製造方法、研磨方法および半導体集積回路装置の製造方法 |
CN106915761B (zh) * | 2015-12-28 | 2021-04-30 | 安集微电子科技(上海)股份有限公司 | 一种氧化铈制备方法及其在sti化学机械抛光中的应用 |
CN106915760B (zh) * | 2015-12-28 | 2021-04-30 | 安集微电子科技(上海)股份有限公司 | 一种氧化铈的制备方法及其在sti抛光领域的应用 |
KR20190089945A (ko) | 2016-12-02 | 2019-07-31 | 로디아 오퍼레이션스 | 산화세륨의 현탁액 |
FR3059660B1 (fr) * | 2016-12-02 | 2019-03-15 | Rhodia Operations | Suspension d'oxyde de cerium |
WO2018143269A1 (ja) * | 2017-01-31 | 2018-08-09 | 三井金属鉱業株式会社 | 成形体 |
KR102261151B1 (ko) * | 2020-02-27 | 2021-06-07 | 비드오리진(주) | 표면 돌기가 형성된 구형 무기 입자 및 그 제조 방법 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20100021004A (ko) | 2007-06-21 | 2010-02-23 | 알까뗄 루슨트 | 주문형 콘텐츠 서비스를 사용자 단말기에 제공하는 방법 및 시스템 |
KR20110020559A (ko) | 2009-08-24 | 2011-03-03 | 노틸러스효성 주식회사 | 금융 자동화기기의 임베디드 메인보드 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11181403A (ja) | 1997-12-18 | 1999-07-06 | Hitachi Chem Co Ltd | 酸化セリウム研磨剤及び基板の研磨法 |
KR100477939B1 (ko) * | 2002-04-15 | 2005-03-18 | 주식회사 엘지화학 | 단결정 산화세륨 분말의 제조방법 |
JP4273920B2 (ja) * | 2002-10-28 | 2009-06-03 | 日産化学工業株式会社 | 酸化セリウム粒子及び多段階焼成による製造方法 |
JP4273921B2 (ja) * | 2002-10-28 | 2009-06-03 | 日産化学工業株式会社 | 酸化セリウム粒子及び加湿焼成による製造方法 |
US7431758B2 (en) | 2002-10-28 | 2008-10-07 | Nissan Chemical Industries, Ltd. | Cerium oxide particles and production method therefor |
CN100337926C (zh) * | 2002-10-28 | 2007-09-19 | 日产化学工业株式会社 | 氧化铈粒子及其制造方法 |
US7229600B2 (en) * | 2003-01-31 | 2007-06-12 | Nanoproducts Corporation | Nanoparticles of rare earth oxides |
US8388710B2 (en) * | 2005-01-26 | 2013-03-05 | Lg Chem, Ltd. | Cerium oxide powder, method for preparing the same, and CMP slurry comprising the same |
JP4463134B2 (ja) * | 2005-03-29 | 2010-05-12 | 三井金属鉱業株式会社 | セリウム系研摩材及びその中間体並びにこれらの製造方法 |
DE102005038136A1 (de) * | 2005-08-12 | 2007-02-15 | Degussa Ag | Ceroxid-Pulver und Ceroxid-Dispersion |
TWI394823B (zh) * | 2006-01-31 | 2013-05-01 | 絕緣膜研磨用cmp研磨劑、研磨方法、以該研磨方法研磨的半導體電子零件 | |
JP5259933B2 (ja) * | 2006-07-06 | 2013-08-07 | 三井金属鉱業株式会社 | セリウム系研摩材用原料およびセリウム系研摩材の製造方法並びにセリウム系研摩材 |
FR2906800B1 (fr) | 2006-10-09 | 2008-11-28 | Rhodia Recherches & Tech | Suspension liquide et poudre de particules d'oxyde de cerium, procedes de preparation de celles-ci et utilisation dans le polissage |
KR100986881B1 (ko) * | 2007-03-16 | 2010-10-08 | 주식회사 엘지화학 | 탄산세륨 분말의 제조방법 |
JP5019323B2 (ja) * | 2007-03-20 | 2012-09-05 | 独立行政法人物質・材料研究機構 | 希土類元素をドープしたセリア焼結体とその製造方法 |
US8333815B2 (en) * | 2007-05-03 | 2012-12-18 | Lg Chem, Ltd. | Cerium oxide powder for abrasive and CMP slurry comprising the same |
KR20100004181A (ko) | 2008-07-03 | 2010-01-13 | 삼성전자주식회사 | 화학 기계적 연마용 슬러리 조성물, 이의 제조 방법 및화학 기계적 연마방법 |
KR101050789B1 (ko) * | 2009-09-21 | 2011-07-20 | 주식회사 엘지화학 | 탄산세륨계 화합물의 제조 방법, 산화세륨의 제조 방법 및 결정성 산화세륨 |
-
2011
- 2011-03-08 KR KR1020110020559A patent/KR101075966B1/ko active IP Right Grant
- 2011-03-09 CN CN201180023381.XA patent/CN102884002B/zh active Active
- 2011-03-09 EP EP11753613.6A patent/EP2546198A4/en not_active Withdrawn
- 2011-03-09 WO PCT/KR2011/001641 patent/WO2011112008A2/ko active Application Filing
- 2011-03-09 JP JP2012556979A patent/JP2013522151A/ja active Pending
- 2011-03-09 US US13/044,144 patent/US8703085B2/en active Active
-
2014
- 2014-11-28 JP JP2014242195A patent/JP5836472B2/ja active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20100021004A (ko) | 2007-06-21 | 2010-02-23 | 알까뗄 루슨트 | 주문형 콘텐츠 서비스를 사용자 단말기에 제공하는 방법 및 시스템 |
KR20110020559A (ko) | 2009-08-24 | 2011-03-03 | 노틸러스효성 주식회사 | 금융 자동화기기의 임베디드 메인보드 |
Non-Patent Citations (2)
Title |
---|
See also references of EP2546198A4 |
THERMOCHMICA ACTA, vol. 424, 2004, pages 131 - 142 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115974127A (zh) * | 2022-11-25 | 2023-04-18 | 深圳市聚芯半导体材料有限公司 | 类球形纳米二氧化铈及其悬浮液、制备方法和应用 |
Also Published As
Publication number | Publication date |
---|---|
EP2546198A4 (en) | 2015-09-16 |
CN102884002B (zh) | 2015-05-06 |
JP2015110513A (ja) | 2015-06-18 |
US8703085B2 (en) | 2014-04-22 |
KR101075966B1 (ko) | 2011-10-21 |
KR20110102230A (ko) | 2011-09-16 |
WO2011112008A3 (ko) | 2012-01-12 |
US20120000137A1 (en) | 2012-01-05 |
CN102884002A (zh) | 2013-01-16 |
JP5836472B2 (ja) | 2015-12-24 |
JP2013522151A (ja) | 2013-06-13 |
EP2546198A2 (en) | 2013-01-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR101075966B1 (ko) | 결정성 산화세륨 및 이의 제조 방법 | |
KR100812052B1 (ko) | 탄산세륨 분말, 산화세륨 분말, 그 제조방법, 및 이를포함하는 cmp 슬러리 | |
JP5101626B2 (ja) | 有機溶媒を用いた酸化セリウム粉末の製造方法及びこの粉末を含むcmpスラリー | |
KR101050789B1 (ko) | 탄산세륨계 화합물의 제조 방법, 산화세륨의 제조 방법 및 결정성 산화세륨 | |
JP4917098B2 (ja) | 炭酸セリウム粉末及び製法、これから製造された酸化セリウム粉末及び製法、これを含むcmpスラリー | |
KR101238786B1 (ko) | 탄산세륨의 제조 방법 및 산화세륨의 제조 방법 | |
KR101492234B1 (ko) | 산화세륨 입자 제조 방법, 이에 의한 산화세륨 입자 및 이를 포함하는 연마 슬러리 | |
US20100187470A1 (en) | Fine cerium oxide powder and preparing method the same and cmp slurry comprising the same | |
JP3918241B2 (ja) | 表面改質された酸化第二セリウム粒子からなる研磨剤及び研磨方法 | |
JP7402565B2 (ja) | セリウム酸化物粒子の製造方法、研磨粒子及びそれを含む研磨用スラリー組成物 | |
TWI403462B (zh) | 碳酸鈰的製備方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201180023381.X Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11753613 Country of ref document: EP Kind code of ref document: A2 |
|
REEP | Request for entry into the european phase |
Ref document number: 2011753613 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011753613 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012556979 Country of ref document: JP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |