WO2018092630A1 - 研磨パッドおよびその製造方法 - Google Patents
研磨パッドおよびその製造方法 Download PDFInfo
- Publication number
- WO2018092630A1 WO2018092630A1 PCT/JP2017/040019 JP2017040019W WO2018092630A1 WO 2018092630 A1 WO2018092630 A1 WO 2018092630A1 JP 2017040019 W JP2017040019 W JP 2017040019W WO 2018092630 A1 WO2018092630 A1 WO 2018092630A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polishing pad
- fiber
- sea
- fibers
- polishing
- Prior art date
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/11—Lapping tools
- B24B37/20—Lapping pads for working plane surfaces
- B24B37/24—Lapping pads for working plane surfaces characterised by the composition or properties of the pad materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0027—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for by impregnation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
- B24D11/001—Manufacture of flexible abrasive materials
- B24D11/005—Making abrasive webs
- B24D11/006—Making abrasive webs without embedded abrasive particles
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
- D04H1/43825—Composite fibres
- D04H1/43828—Composite fibres sheath-core
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
- D04H1/43825—Composite fibres
- D04H1/4383—Composite fibres sea-island
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
- D04H1/43835—Mixed fibres, e.g. at least two chemically different fibres or fibre blends
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
- D04H1/43838—Ultrafine fibres, e.g. microfibres
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
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- D04H1/5416—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres sea-island
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/30625—With simultaneous mechanical treatment, e.g. mechanico-chemical polishing
Definitions
- the present invention relates to a polishing pad for polishing various devices such as a semiconductor substrate, a semiconductor device, a compound semiconductor substrate, a compound semiconductor device, and a manufacturing method thereof.
- CMP chemical mechanical polishing
- a polishing pad having a soft and smooth surface is advantageous for realizing excellent flatness of the workpiece.
- a polishing pad having a hard and rough surface is advantageous.
- Patent Document 1 a polishing pad using ultrafine fibers and a polymer elastic body is proposed.
- the sea-island type composite fibers are made into ultrafine fibers after impregnating the substrate with a polymer elastic body, there is a problem that the polishing pad has many voids and is too soft. Since such a polishing pad does not easily have high hardness, it has been difficult to achieve excellent flatness and long life of the workpiece.
- Patent Document 2 proposes a polishing pad made of a dense nonwoven fabric and a polymer elastic body using ultrafine fibers.
- a polishing pad made of a dense nonwoven fabric and a polymer elastic body using ultrafine fibers.
- high rigidity is maintained by a fiber bundle made of ultrafine fibers of long fibers.
- the polishing pad is densified and the porosity is low, it is difficult to sufficiently accumulate polishing grains, and there is a problem that it is difficult to realize a high polishing rate.
- JP 2012-071415 A Japanese Patent Laying-Open No. 2015-063782
- An object of the present invention is to provide a polishing pad that has a long polishing life, has a high polishing rate, and can realize excellent flatness of a workpiece, and a method for manufacturing the same.
- the present inventors have devised the type and surface state of the fibers used, and have a long polishing life and a high polishing rate, and excellent workability.
- the inventors have found that a polishing pad capable of realizing flatness can be obtained, and have made further studies, and have completed the present invention.
- the porosity is 50% or more and the bending strength is 5.0 N / mm 2 or more.
- the surface is preferably raised.
- the ultrafine fiber has a zeta potential of ⁇ 20 mV or less.
- the said ultrafine fiber consists of polyamide or polyester.
- the binder fiber is preferably a core-sheath type composite fiber.
- the weight ratio of the ultrafine fiber to the binder fiber is preferably in the range of (ultrafine fiber / binder fiber) 50/50 to 97/3.
- the sea component is removed from a non-woven fabric including a sea component and an island component having an island diameter of 10 to 2500 nm and a binder fiber to provide a polymer elastic body.
- a method of manufacturing a polishing pad characterized in that:
- the single fiber fineness ratio of the sea-island type composite fiber and the binder fiber is preferably in the range of (sea-island type composite fiber: binder fiber) 1: 0.49 to 1: 0.70.
- the said nonwoven fabric is a needle punch nonwoven fabric.
- the basis weight of the nonwoven fabric is preferably in the range of 300 to 600 g / m 2 .
- the tensile strength of a vertical or horizontal direction is 100 N / cm or more in the said nonwoven fabric. Further, it is preferable to brush the surface.
- a polishing pad that has a long life, a high polishing rate, and can realize excellent flatness of a workpiece, and a method for manufacturing the same.
- the polishing pad of the present invention includes ultrafine fibers, binder fibers, and a polymer elastic body.
- the ultrafine fibers are obtained by dissolving and removing sea components from sea-island composite fibers containing soluble resin as sea components.
- the ultrafine fiber preferably has a zeta potential on the minus side of the zeta potential of the fiber relative to the zeta potential of the abrasive. Numerically, it preferably has a zeta potential of ⁇ 20 mV or less (more preferably ⁇ 40 to ⁇ 80 mV). The zeta potential of the abrasive is preferably in the range of ⁇ 40 to ⁇ 80 mV.
- the zeta potential of ultrafine fibers increases, when combined with the abrasive, the zeta potential of the abrasive shifts to the plus side, agglomeration of abrasive grains occurs, the number of working abrasive grains decreases, and the polishing rate tends to decrease It becomes. Moreover, there is a possibility that the surface roughness becomes poor and scratches are likely to occur.
- the polymer constituting the ultrafine fiber may be any polymer.
- polyamide nylon
- polyester polyolefin
- polyphenylene sulfide and the like, which are excellent in fiber forming property, are preferable examples.
- amino acids such as 6-aminocaproic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid and paraaminomethylbenzoic acid and lactams such as ⁇ -caprolactam and ⁇ -laurolactam are mainly used as raw materials.
- the main acid components are aliphatic dicarboxylic acids such as octadecanedioic acid, and aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid and naphthalenedicarboxylic acid.
- Tetramethylenediamine Tetramethylenediamine, hexamethylenediamine, 1,5-pentanediamine, 2- Methylpentamethylenediamine, Examples thereof include copolyamides containing nonamethylenediamine, undecamethylenediamine, dodecamethylenediamine and the like as diamine components.
- polyester resin polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, and the like are preferable from the viewpoints of yarn production and physical properties of ultrafine fibers.
- the polymer may contain a copolymer component within a range not impairing the object of the present invention.
- the copolymerizable compound includes, for example, isophthalic acid, cyclohexanedicarboxylic acid, adipic acid, dimer acid, sebacic acid, 2,6-naphthalenedicarboxylic acid and the like as the glycol component, and the glycol component includes, for example, ethylene glycol. , Diethylene glycol, butanediol, neopentyl glycol, cyclohexanedimethanol, polyethylene glycol, polypropylene glycol and the like. Of course, it is not limited to these.
- the polyphenylene sulfide resin includes, for example, p-phenylene sulfide units, m-phenylene sulfide units, o-phenylene sulfide units, phenylene sulfide sulfone units, phenylene sulfide ketone units, phenylene sulfide ether units, diphenylene sulfide units, Examples thereof include those comprising a substituent-containing phenylene sulfide unit, a branched structure-containing phenylene sulfide unit, and the like. Among them, those containing 70 mol% or more (more preferably 90 mol% or more) of p-phenylene sulfide units are preferable. Furthermore, poly (p-phenylene sulfide) is more preferable.
- the ultrafine fiber needs to have a fiber diameter in the range of 10 to 2500 nm.
- the fiber diameter is less than 10 nm, the strength per single fiber is reduced, and the single fiber may be broken due to friction, making it difficult to use.
- the fiber diameter exceeds 2500 nm, the fineness peculiar to ultrafine fibers is lowered, the surface roughness of the object to be polished is increased, and there is a possibility that the performance required in recent years cannot be obtained.
- the fiber diameter of the ultrafine fiber is preferably in the range of 200 to 1000 nm (more preferably 400 to 700 nm). In such a range, the space
- the fiber diameter When the fiber diameter is too large, the space between the fibers becomes wide, and as a result, the number of working abrasive grains may decrease and the polishing rate may be lowered. On the other hand, if the fiber diameter is too small, the inter-fiber gap is reduced and the retainability of the abrasive grains may be reduced.
- the fiber diameter can be measured by taking a cross-sectional photograph of a single fiber with a transmission electron microscope TEM at a magnification of 30000 times. At that time, in a TEM having a length measurement function, measurement can be performed using the length measurement function. In a TEM without a length measuring function, a photograph taken may be enlarged and copied and measured with a ruler in consideration of the scale.
- the diameter of the circumscribed circle of the cross-section of the single fiber is used.
- the ultrafine fibers gather to take the shape of a fiber bundle.
- the number of ultrafine fibers constituting one fiber bundle is preferably 200 to 20000 (more preferably 400 to 1000), which makes it easy to ensure appropriate flexibility.
- the length of the ultrafine fibers is preferably in the range of 30 to 100 mm (more preferably 40 to 80 mm), and it is preferable that good entanglement easily occurs between the ultrafine fibers and between the binder fibers.
- the polishing pad of the present invention needs to contain binder fibers.
- the fiber diameter (single fiber diameter) of the binder fiber is preferably larger than the ultrafine fiber. In particular, it is preferably in the range of 1 to 20 ⁇ m. If the fiber diameter is too small, the tensile strength is low, which may cause wrinkles in the production process. On the other hand, if the fiber diameter is too large, the texture of the structure composed of ultrafine fibers and binder fibers may be deteriorated.
- the diameter of the circumscribed circle is defined as the fiber diameter in the present invention. Further, such a fiber diameter can be measured by photographing a cross section of the fiber with a transmission electron microscope.
- the length of the binder fiber is preferably the same as the length of the ultrafine fiber. Specifically, a length in the range of 30 to 100 mm (more preferably 40 to 80 mm) is preferable because good entanglement tends to occur between ultrafine fibers (between ultrafine fiber bundles) and binder fibers.
- the binder fiber is preferably a core-sheath fiber in which a high-melting point thermoplastic resin is present in the core and a low-melting point thermoplastic resin is present in the sheath part.
- the resin constituting the core is preferably a polyester resin or a polyamide resin.
- a polyethylene terephthalate resin is preferable.
- the thermoplastic resin having a low melting point of the sheath is preferably a polyolefin resin. Of these, polyethylene is preferable, and high-density polyethylene is more preferable.
- the binder fiber may be an unstretched fiber.
- unstretched fibers are preferably unstretched polyester fibers spun at a spinning speed of 600 to 1500 m / min.
- polyester include polyethylene terephthalate, polytrimethylene terephthalate, and polybutylene terephthalate.
- polyethylene terephthalate or a copolyester having it as a main component is preferred for reasons such as productivity and dispersibility in water.
- the ultrafine fibers are constrained by the binder fibers.
- a fiber bundle made of ultrafine fibers is constrained by a binder fiber while maintaining its shape.
- the weight ratio of the ultrafine fibers and binder fibers used in the polishing pad of the present invention is preferably 50/50 to 97/3.
- the ratio of the ultrafine fibers 50% or more in this way, the thickness and hardness of the structure composed of the ultrafine fibers and the binder fibers can be easily maintained, and the generation of wrinkles in the process can be suppressed. This has the effect of stabilizing the density distribution of the inner fibers.
- the weight ratio of the ultrafine fibers is too small, there is a possibility that the retainability of the abrasive grains becomes insufficient.
- the weight ratio of the ultrafine fibers is too large, the fiber structure becomes too soft, which may cause wrinkles in the middle process.
- the density of only the fibers is preferably in the range of 0.09 g / cm 3 or more (more preferably 0.10 to 0.15 g / cm 3 ). If the density is too small, the exposure of ultrafine fibers to the surface of the polishing pad is reduced, the amount of abrasive grains held tends to be reduced, and the polishing rate may be reduced.
- Raising is mainly derived from ultrafine fibers. By using such ultrafine fibers, agglomeration of abrasive grains is prevented, the number of abrasive grains acting on the processed substrate is increased, a high polishing rate, and excellent smoothness (low surface roughness, (Scratchless) can be achieved at the same time.
- the porosity is preferably 50% or more (more preferably 50 to 65%, particularly preferably 55 to 60%). By having such a porosity, since a large amount of slurry is contained in the polishing pad, the chemical reaction given to the workpiece is increased, and the polishing rate is improved.
- the porosity (%) is calculated by the following formula.
- Porosity (%) (1 ⁇ (bulk density / theoretical density)) ⁇ 100
- the theoretical density is a weighted average density of the constituent materials and is calculated by the following formula.
- Theoretical density (g / cm 3 ) 1 ⁇ ((resin ratio (%) / 100 / resin density) + (fiber ratio (%) / 100 / fiber density))
- the bending strength is preferably 5.0 N / mm 2 (0.51 kgf / mm 2 ) or more.
- the bending strength (bending strength) is greater than 19.6 N / mm 2 , the polishing pad is too hard, so that the contact area between the polishing pad and the workpiece decreases, the polishing rate decreases, and the workpiece is processed. There is also a possibility that the surface roughness of the object also deteriorates.
- the bending strength (bending strength) is measured according to JIS K 6911.
- the polishing pad of the present invention contains a polymer elastic body together with the above-mentioned ultrafine fibers and binder fibers.
- polyurethane elastomer polyurethane elastomer, acrylonitrile, butadiene rubber, natural rubber, polyvinyl chloride, or the like can be used. Of these, polyurethane elastomers are preferable from the viewpoint of processability.
- a method for applying such a polymer elastic body there are various methods such as a method of coagulating wet or dry after applying or impregnating the polymer elastic body, or a method of applying or impregnating in the form of emulsion or latex and drying and fixing in a dry manner. This method can be adopted.
- the resin ratio is preferably 40 to 80% by weight relative to the weight of the polishing pad. If the resin ratio is too small, the hardness of the polishing pad is lowered, and the flatness tends to deteriorate when the workpiece is polished. On the other hand, if the resin ratio is too large, the porosity of the polishing pad becomes small, and when the workpiece is polished, the replacement of abrasive grains tends to be poor, and the polishing rate tends to be low.
- the polymer elastic body is also present inside the fiber bundle constituted by the ultrafine fibers because shape retention is improved.
- the surface roughness (KES surface roughness SMD) of the polishing pad is preferably 1 to 10 ⁇ m. If the surface roughness is too small, it is difficult for abrasive grains to enter between the polishing pad and the processed substrate during polishing, the number of working abrasive grains decreases, the polishing rate decreases, and the surface roughness of the workpiece may also deteriorate. There is. Conversely, when the surface roughness is too large, the flatness of the workpiece after polishing may be deteriorated.
- the hardness of the polishing pad is 70 degrees or more when measured with a type A durometer. Further, it is preferably in the range of 80 to 95 degrees. If the hardness is too small, the flatness of the workpiece may be deteriorated when the workpiece is polished.
- the polishing pad of the present invention can be obtained, for example, by the following manufacturing method. That is, a polishing characterized by removing a sea component from a nonwoven fabric containing a sea component and an island component having an island diameter of 10 to 2500 nm and a binder fiber, and providing a polymer elastic body. It is a manufacturing method of a pad.
- the resin of the island component constituting the sea-island type composite fiber is the same as the resin constituting the ultrafine fiber, and may be any polymer.
- polyamides, polyesters, polyolefins, polyphenylene sulfides, and the like, which are excellent in fiber forming properties, are preferable examples.
- the soluble resin constituting the sea component an aqueous solution of an alkali metal compound such as sodium hydroxide, potassium hydroxide, sodium carbonate or potassium carbonate, or a polymer which can be eluted with an organic solvent such as toluene or trichloroethylene is used.
- an alkali metal compound such as sodium hydroxide, potassium hydroxide, sodium carbonate or potassium carbonate, or a polymer which can be eluted with an organic solvent such as toluene or trichloroethylene
- the sea component of the sea-island type composite fibers is removed before applying the polymer elastic body.
- the extraction process is performed under a mild condition.
- a method of dissolving and removing sea components by an alkali weight loss method or a hot water extraction method is preferable.
- copolymerized polyesters with a specific amount of 5-sodium sulfoisophthalic acid and isophthalic acid copolymerized copolymerized polyesters with a specific amount of 5-sodium isophthalic acid, isophthalic acid and polyalkylene glycol or derivatives thereof copolymerized Copolyesters obtained by copolymerizing specific amounts of 5-sodium sulfoisophthalic acid, isophthalic acid and aliphatic dicarboxylic acid are preferred. Furthermore, it is also preferable to copolymerize polyethylene glycol with the component forming the sea component.
- Such sea-island type composite fibers can be produced by the methods disclosed in International Publication No. 2005/095686 and International Publication No. 2008/130019. That is, as the die used for melt spinning, any one such as a hollow pin group for forming an island component or a group having a fine hole group (pinless) can be used. For example, a spinneret in which a cross section of a sea island is formed by merging and compressing an island component extruded from a hollow pin or a fine hole and a sea component flow designed to fill the gap between them. Good.
- the discharged sea-island type composite fiber is solidified by cooling air and taken up by a rotating roller or an ejector set at a predetermined take-up speed to obtain an undrawn yarn (birefringence index ⁇ n is preferably 0.05 or less).
- the take-up speed is not particularly limited, but is preferably 200 to 5000 m / min. If it is 200 m / min or less, the productivity may decrease. Further, if it is 5000 m / min or more, the spinning stability may be lowered.
- the obtained undrawn yarn may be subjected to the cutting step or the subsequent extraction step (alkaline weight loss processing) as it is, if necessary, after being made into a drawn yarn via a drawing step or a heat treatment step, and then the cutting step or You may use for a subsequent extraction process (alkali weight reduction process).
- the stretching step may be a separate stretching method in which spinning and stretching are performed in separate steps, or a straight stretching method in which stretching is performed immediately after spinning in one process.
- the order of the cutting process and the extraction process may be reversed.
- Such cutting is preferably performed with a guillotine cutter, a rotary cutter, or the like using undrawn yarn or drawn yarn as it is or with a tow bundled in units of tens to millions.
- a nonwoven fabric is obtained using the sea-island type composite fiber and the binder fiber as described above.
- the single fiber fineness ratio of the sea-island type composite fiber and the binder fiber is within the range of (sea-island type composite fiber: binder fiber) 1: 0.49 to 1: 0.70, the density unevenness of the nonwoven fabric is reduced. This can be reduced and is preferable.
- a known method such as needle punching or water flow can be used as the entanglement method.
- a method of mechanical entanglement with a needle punch that is likely to cause physical entanglement is preferable.
- the basis weight of the nonwoven fabric is preferably in the range of 300 to 600 g / m 2 .
- the nonwoven fabric has a vertical or horizontal tensile strength of 100 N / cm or more (preferably a vertical and horizontal tensile strength of 130 to 200 N / cm).
- a vertical or horizontal tensile strength of 100 N / cm or more (preferably a vertical and horizontal tensile strength of 130 to 200 N / cm).
- this tensile strength is low, it tends to cause wrinkles in the weight loss process or the like.
- the ultrafine fibers are easily detached during polishing, which may shorten the life of the polishing pad.
- the sea component contained in the sea-island type composite fiber is removed from the nonwoven fabric.
- the method for extracting the sea component is not particularly limited, but is preferably a mild alkali weight loss treatment or hot water extraction treatment that does not damage the binder fiber.
- the sea-island type composite fibers contained in the nonwoven fabric become ultrafine fibers.
- the bulk density of the fibers is 0.09 g / cm 3 or more.
- the fiber density is preferably 0.10 to 0.15 g / cm 3 .
- a polymer elastic body is applied to the nonwoven fabric.
- a polymer elastic body polyurethane elastomer, acrylonitrile, butadiene rubber, natural rubber, polyvinyl chloride and the like can be used. Of these, polyurethane elastomers are preferable from the viewpoint of processability.
- a method for applying such a polymer elastic body there are various methods such as a method of coagulating wet or dry after applying or impregnating the polymer elastic body, or a method of applying or impregnating in the form of emulsion or latex and drying and fixing in a dry manner. This method can be adopted.
- the application is a two-stage application.
- napped fibers of ultrafine fibers by polishing at least one of the surfaces (preferably both surfaces).
- the polishing pad thus obtained becomes a polishing pad having a high polishing rate, a long life, and a low surface roughness at the same time.
- a workpiece for example, various devices such as a semiconductor substrate, a semiconductor device, a compound semiconductor substrate, a compound semiconductor device, etc.
- a workpiece having a high polishing rate and high flatness and low surface roughness is obtained. It becomes possible to polish.
- the present invention will be specifically described below with reference to examples. However, the present invention is not limited thereby.
- the evaluations and characteristic values in the following examples were determined by the following measurement methods.
- the basis weight (g / m 2 ) and the strength (N / cm,%) were determined according to JIS L1913.
- the thickness (mm) was determined according to JIS L1085. From these values, the bulk density (g / cm 3 ) which is the basis weight / thickness was calculated. Further, the air permeability (cm 3 / cm 2 ⁇ sec) was determined according to JIS L1096-A.
- the porosity (%) was calculated by the following formula.
- Porosity (%) (1 ⁇ (bulk density / theoretical density)) ⁇ 100
- the theoretical density is a weighted average density of the constituent materials, and was calculated by the following formula.
- Theoretical density (g / cm 3 ) 1 ⁇ ((resin ratio (%) / 100 / resin density) + (fiber ratio (%) / 100 / fiber density))
- the density of the nylon 6 fiber 1.222g / cm 3
- the density of the polyurethane resin 1.180 g / cm 3.
- the hardness of the polishing pad was measured according to JIS K6253 using a DD2-A type manufactured by Kobunshi Keiki Co., Ltd.
- the compression / elastic modulus (%) was determined according to JIS L1096.
- the contact angle (°) was determined according to JIS R3257.
- the bending strength was determined in accordance with JIS K 6911 with the test piece having a height of one sample and the test width being 25 mm.
- KES surface roughness SMD ( ⁇ m) A piano wire having a diameter of 0.5 mm and a width of 5 mm was pressed against the sample at 10 gf (9.8 cN), and the average deviation of the surface roughness when the sample was moved at a speed of 0.1 cm / sec was obtained.
- Polishing performance (4-1) Polishing rate ( ⁇ m / h) Using a polishing pad having a diameter of 380 mm, the polishing amount per hour of a 3-inch (7.62 cm) sapphire wafer was measured using a single-side polishing machine under the following conditions.
- nanofiber dispersion liquid 1 g / 1000 g
- NF dispersion a measurement sample for fibers
- PET polyethylene terephthalate
- PE high-density polyethylene
- a non-woven fabric having a basis weight of 330 g / m 2 comprising 62 wt% of fiber diameter 0.7 ⁇ m ⁇ 836) and 38 wt% of binder short fibers fixing the fiber bundle was prepared.
- the obtained nonwoven fabric was subjected to primary impregnation with a polyurethane resin (100% modulus, 20 MPa) in a wet process, and then both surfaces were sliced to a thickness of 1.30 mm. Furthermore, secondary impregnation with a polyurethane resin (100% modulus, 15 MPa) was performed in a dry process. The porosity at this time was adjusted to 54.3%. Finally, both surfaces were buffed to form napping (raising) and at the same time the surface was smoothed, and an adhesive tape was attached to the back surface to obtain a polishing pad. The configuration and polishing performance of this polishing pad are shown in Table 1.
- Example 2 A polishing pad was obtained in the same manner as in Example 1 except that the porosity of the polishing pad in Example 1 was changed to 58.9%. The configuration and polishing performance of this polishing pad are shown in Table 1.
- Example 3 A polishing pad was obtained in the same manner as in Example 1 except that the porosity of the polishing pad in Example 1 was changed to 46.5%. The configuration and polishing performance of this polishing pad are shown in Table 1.
- Example 4 A polishing pad was obtained in the same manner as in Example 1 except that the porosity of the polishing pad in Example 1 was changed to 61.8%. The configuration and polishing performance of this polishing pad are shown in Table 1.
- polishing pads of Examples 1 and 2 have high hardness while having appropriate hardness, a large amount of slurry can be contained, the chemical action is increased, and a high polishing rate can be achieved. Furthermore, the presence of nanofiber fibers in bundles can hold a large amount of abrasive grains in the inter-fiber gap, increasing the working efficiency and realizing excellent flatness and high polishing rate of the workpiece.
- a non-woven fabric having a weight per unit area of 319 g / m 2 comprising 62 wt% of fiber diameter 0.7 ⁇ m ⁇ 836) and 38 wt% of binder short fibers fixing the fiber bundle was prepared. Table 2 shows the physical properties of this nonwoven fabric for polishing pad.
- Reference Example 2 A nonwoven fabric was produced in the same manner as in Reference Example 1 except that the binder fiber of Reference Example 1 was changed to a single fiber diameter of 15.1 ⁇ m. Table 2 shows the physical properties of this nonwoven fabric for polishing pad.
- Reference Example 3 A nonwoven fabric was produced in the same manner as in Reference Example 1 except that the sea-island composite fiber in which the island component of Reference Example 1 was changed from nylon 6 to polyethylene terephthalate (PET) was used. Table 2 shows the physical properties of this nonwoven fabric for polishing pad.
- Reference Example 5 A nonwoven fabric was prepared in the same manner as in Reference Example 1 except that the binder fiber of Reference Example 1 was changed to a single fiber diameter of 11.2 ⁇ m. Table 2 shows the physical properties of this nonwoven fabric for polishing pad.
- Reference Example 6 A nonwoven fabric was produced in the same manner as in Reference Example 5 except that a sea-island composite fiber in which the island component of Reference Example 5 was changed from nylon 6 to polyethylene terephthalate (PET) was used. Table 2 shows the physical properties of this nonwoven fabric for polishing pad.
- the density spots in the length direction of the nonwoven fabric were reduced. Since the polishing pad using this nonwoven fabric has a uniform fiber density, it has the same fiber density from the surface layer to the lower layer of the polishing pad, and even if the thickness is reduced by using the polishing pad, the polishing performance may change. There was no long life. In addition, a polishing pad having excellent polishing performance can be stably produced and provided.
- the zeta potential of the silica slurry (1) for measuring the polishing rate (“COMPOL 80” manufactured by Fujimi Incorporated, particle size: 72 nm) was “ ⁇ 57.7 mV”. Further, the zeta potential of the silica slurry (2) (“DSC-0902” manufactured by Fujimi Incorporated) was “ ⁇ 58.4 mV”. Moreover, when the particle size of the slurry after the test was measured, the silica slurry (1) was “122 nm” and the silica slurry (2) was “125 nm”. Next, when the zeta potential and the particle size after the test were measured for the mixture of nanofiber and silica slurry, the results shown in Table 3 below were obtained.
- Nylon nanofibers with a smaller zeta potential (larger on the minus side) than the slurry used did not change the zeta potential on the plus side even when mixed with the slurry (abrasive). Aggregation is suppressed.
- polyester nanofibers with a larger zeta potential than the slurry used (on the positive side) when mixed with the slurry (abrasive), change to the positive side of the original zeta potential of the abrasive, slightly Aggregation of abrasive grains is occurring.
- a non-woven fabric having a basis weight of 330 g / m 2 comprising 62 wt% of fiber diameter 0.7 ⁇ m ⁇ 836) and 38 wt% of binder short fibers fixing the fiber bundle was prepared.
- the obtained nonwoven fabric was subjected to primary impregnation with a polyurethane resin (100% modulus, 35 MPa) in a dry process, and then both surfaces were sliced to a thickness of 1.3 mm. Furthermore, secondary impregnation with a polyurethane resin (100% modulus, 100 MPa) was performed in a dry process. Finally, both surfaces were buffed (raised) to form raised hairs, and at the same time, the surface was smoothed and an adhesive tape was attached to the back surface to obtain a polishing pad. The configuration and polishing performance of this polishing pad are shown in Table 4.
- Example 6 A polishing pad was produced in the same manner as in Example 5 except that sea-island composite fibers in which the island component of Example 5 was changed from nylon 6 to polyethylene terephthalate (PET) were used. The configuration and polishing performance of this polishing pad are shown in Table 4.
- Example 7 A nonwoven fabric having a basis weight of 320 g / m 2 made of a nylon 6 ultrafine fiber bundle and binder fibers was produced as in Example 5.
- the obtained nonwoven fabric was subjected to primary impregnation with a polyurethane resin (100% modulus 80 MPa) in the wet process, and sliced in the same manner as in Example 5.
- a polishing pad was obtained by impregnation with secondary resin, buffing, and the like. The configuration and polishing performance of this polishing pad are shown in Table 4.
- Example 8 A nonwoven fabric having a basis weight of 320 g / m 2 made of a polyethylene terephthalate microfiber bundle and a binder fiber, as in Example 6, was prepared.
- Example 5 instead of primary impregnation in the dry process, the same procedure as in Example 5 was performed except that the obtained nonwoven fabric was subjected to primary impregnation with a polyurethane resin (100% modulus, 80 MPa) in the wet process. Then, slicing, secondary resin impregnation, buffing, etc. were performed to obtain a polishing pad. The configuration and polishing performance of this polishing pad are also shown in Table 4.
- Example 1 A basis weight of 300 g was used in the same manner as in Example 5 except that nylon-6 short fibers having a single fiber diameter of 18.5 ⁇ m and a length of 51 mm were used instead of the sea-island composite fiber of Example 5 and the alkali weight reduction treatment was not performed. A non-woven fabric of / m 2 was produced.
- Example 5 dry primary resin impregnation, slicing, dry secondary resin impregnation, buffing, etc. were performed to obtain a polishing pad, and Comparative Example 1 was obtained.
- Example 7 wet primary resin impregnation, slicing, dry secondary resin impregnation, buffing, etc. were performed to obtain a polishing pad, which was Comparative Example 2.
- Table 4 shows the configuration and polishing performance of these polishing pads.
- Example 5 dry primary resin impregnation, slicing, dry secondary resin impregnation, buffing, etc. were performed to obtain a polishing pad, which was Comparative Example 3.
- Example 7 wet primary resin impregnation, slicing, dry secondary resin impregnation, buffing, etc. were performed to obtain a polishing pad, which was Comparative Example 4.
- Table 4 shows the configuration and polishing performance of these polishing pads.
- Examples 5 and 7 are polishing pads obtained by impregnating a polyurethane resin into a nonwoven fabric using nylon nanofiber fibers in which the fibers used are higher in zeta potential (minus side) than the slurry.
- Examples 6 and 8 are polishing pads using polyester nanofiber fibers instead of nylon nanofiber fibers.
- Comparative Examples 1 and 2 are polishing pads using nylon regular fibers, and Comparative Examples 3 and 4 are polyester regular fibers.
- the presence of bundles of nanofiber fibers can hold a large amount of abrasive grains in the interfiber gap, increasing the working efficiency, and excellent flatness and high polishing rate of the workpiece.
- the physical properties of the polishing pad were high hardness, low compression rate and low surface roughness.
- the sapphire polishing performance of the nylon nanofiber fibers used in Examples 5 and 7 is particularly excellent.
- These polishing pads use nylon nanofiber fibers with a high zeta potential (minus side) to prevent agglomeration of abrasive grains and achieve low surface roughness (scratchless). It is done.
- a polishing pad that has a long polishing life, a high polishing rate, and can realize excellent flatness of a workpiece and a manufacturing method thereof, and its industrial value is extremely large.
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Abstract
Description
空隙率(%)=(1-(嵩密度/理論密度))×100
ただし、理論密度とは、構成材料の加重平均密度であり、下記式により算出する。
理論密度(g/cm3)=1÷((樹脂比率(%)/100/樹脂密度)+(繊維比率(%)/100/繊維密度))
さらに本発明の研磨パッドにおいて、曲げ強度(曲げ強さ)が5.0N/mm2(0.51kgf/mm2)以上であることが好ましい。5.9~19.6N/mm2(0.6~2.0kgf/mm2)であることがより好ましく、7.8~15.7N/mm2(0.8~1.6kgf/mm2)であることが特に好ましい。曲げ強度が5.0N/mm2より小さいと、研磨時の加工圧により研磨パッドが変形し空隙が潰れ、また、研磨パッドと被加工物間の隙間が小さくなり、スラリーが入り難くなることから、研磨レートが低下し、さらには被加工物の平坦性も悪くなるおそれがある。一方、曲げ強度(曲げ強さ)が19.6N/mm2より大きいと、研磨パッドが硬過ぎることから、研磨パッドと被加工物の接触面積が低下し、研磨レートが低下すると共に、被加工物の表面粗さも悪くなるおそれがある。なお、曲げ強度(曲げ強さ)はJIS K 6911により測定する。
(1)不織布の物性
目付け(g/m2)および強伸度(N/cm、%)はJIS L1913により求めた。厚さ(mm)はJIS L1085により求めた。これらの値から目付け/厚さである嵩密度(g/cm3)を計算した。さらに通気度(cm3/cm2・sec)についてはJIS L1096-Aにより求めた。
(2)研磨パッドの物性
不織布の物性と同様に、目付け(g/m2)はJIS L1913により求めた。厚さ(mm)はJIS L1085により求めた。これらの値から目付け/厚さである嵩密度(g/cm3)を計算した。
空隙率(%)=(1-(嵩密度/理論密度))×100
ただし、理論密度とは、構成材料の加重平均密度であり、下記式により算出した。
理論密度(g/cm3)=1÷((樹脂比率(%)/100/樹脂密度)+(繊維比率(%)/100/繊維密度))
なお、ナイロン6繊維の密度を1.222g/cm3、ポリウレタン樹脂の密度を1.180g/cm3とした。
(3)KES表面粗さSMD(μm)
0.5mm径5mm幅のピアノ線を10gf(9.8cN)で試料に圧着し、0.1cm/secの速度で試料を動かせた際の表面粗さの平均偏差として求めた。
(4)研磨性能
(4-1)研磨レート(μm/h)
直径380mmの研磨パッドを使用し、3inch(7.62cm)サファイアウェハの1時間当たりの研磨量を、片面研磨機を用いて下記条件にて測定した。
スラリー量 :500ml/min
圧力 :350g/cm2
研磨時間 :60min
回転数 :ヘッド/プラテン(定盤)=50rpm/49rpm
使用スラリー:シリカ(フジミインコーポレ-テッド社製「コンポール80」)
(4-2)ウエハの表面粗さRa(nm)
原子間力顕微鏡にて基板中心部10μm角の表面粗さを測定した。該表面粗さRaが小さいほど優れた平坦性を有する。
(5)ゼータ電位(mV)
測定対象の繊維を0.2mm長にカットし、繊維/精製水=1g/1000gの濃度に調整し、ミキサーで十分に分散するまで撹拌し、繊維用の測定試料(以下、「ナノファイバー分散液」あるいは「NF分散液」という)とした。
島成分としてナイロン(Ny)6、海成分として5-ナトリウムスルホイソフタル酸を共重合したポリエチレンテレフタレートを用い、紡糸、延伸して、海:島=30:70、島数=836、単繊維繊度5.6dtexの海島型複合繊維を得た後、44mmの長さに切断した。
実施例1の研磨パッドの空隙率を58.9%に変更した以外は、実施例1と同様にして、研磨パッドを得た。この研磨パッドの構成および研磨性能を表1に示した。
実施例1の研磨パッドの空隙率を46.5%に変更した以外は、実施例1と同様にして、研磨パッドを得た。この研磨パッドの構成および研磨性能を表1に示した。
実施例1の研磨パッドの空隙率を61.8%に変更した以外は、実施例1と同様にして、研磨パッドを得た。この研磨パッドの構成および研磨性能を表1に示した。
島成分としてナイロン6、海成分として5-ナトリウムスルホイソフタル酸を共重合したポリエチレンテレフタレートを用い、紡糸、延伸して、海:島=30:70、島数=836、繊度5.6dtexの海島型複合繊維を得て44mmの長さに切断した。
参考例1のバインダー繊維を単繊維径15.1μmに変更した以外は参考例1と同様にして、不織布を作製した。この研磨パッド用不織布の物性を表2に示した。
参考例1の島成分をナイロン6からポリエチレンテレフタレート(PET)に変更した海島複合繊維を用いた以外は、参考例1と同様にして不織布を作製した。この研磨パッド用不織布の物性を表2に示した。
ポリエチレンテレフタレートを用い、紡糸、延伸して、単繊維径18.5μmで長さ51mmに切断した。この短繊維をニードルパンチにて機械的に絡合し、目付け308g/m2の不織布を作製した。この研磨パッド用不織布の物性を表2に示した。
参考例1のバインダー繊維を単繊維径11.2μmに変更した以外は参考例1と同様にして不織布を作製した。この研磨パッド用不織布の物性を表2に示した。
参考例5の島成分をナイロン6からポリエチレンテレフタレート(PET)に変更した海島複合繊維を用いた以外は、参考例5と同様にして、不織布を作製した。この研磨パッド用不織布の物性を表2に示した。
以下の実施例にて用いる材料についてゼータ電位を測定したところ、それぞれのゼータ電位は、ナイロン(Ny6)ナノファイバー「-66.9mV」、ポリエステル(PET)ナノファイバー「-25.1mV」であった。
次いで、ナノファイバーとシリカスラリーとの混合物について、ゼータ電位と試験後の粒径を測定したところ、下記の表3の結果となった。
島成分としてナイロン6(Ny6)、海成分として5-ナトリウムスルホイソフタル酸を共重合したポリエチレンテレフタレートを用い、紡糸、延伸して、海:島=30:70、島数=836、単繊維繊度5.6dtexの海島型複合繊維を得た後、44mmの長さに切断した。
実施例5の島成分をナイロン6からポリエチレンテレフタレート(PET)に変更した海島複合繊維を用いた以外は、実施例5と同様にして、研磨パッドを作製した。この研磨パッドの構成および研磨性能を表4に示した。
実施例5と同じ、ナイロン6極細繊維束とバインダー繊維からなる、目付け320g/m2の不織布を作製した。
実施例6と同じ、ポリエチレンテレフタレート極細繊維束とバインダー繊維からなる、目付け320g/m2の不織布を作製した。
実施例5の海島複合繊維に代えて、単繊維径18.5μm、長さ51mmのナイロン-6短繊維を用い、アルカリ減量処理を行わなかった以外は、実施例5と同様にして、目付け300g/m2の不織布を作製した。
実施例5の海島複合繊維に代えて、単繊維径18.5μm、長さ51mmのポリエチレンテレフタレート短繊維を用い、アルカリ減量処理を行わなかった以外は、実施例5と同様にして、目付け300g/m2の不織布を作製した。
Claims (13)
- 研磨パッドであり、繊維径が10~2500nmの極細繊維と、バインダー繊維と、高分子弾性体とを含むことを特徴とする研磨パッド。
- 空隙率が50%以上であり、かつ曲げ強度が5.0N/mm2以上である、請求項1に記載の研磨パッド。
- 表面が起毛している、請求項1または請求項2に記載の研磨パッド。
- 前記極細繊維においてゼータ電位が-20mV以下である、請求項1~3のいずれかに記載の研磨パッド。
- 前記極細繊維が、ポリアミドまたはポリエステルからなる、請求項1~4のいずれかに記載の研磨パッド。
- 前記バインダー繊維が芯鞘型複合繊維である、請求項1~5のいずれかに記載の研磨パッド。
- 前記極細繊維とバインダー繊維との重量比が(極細繊維/バインダー繊維)50/50~97/3の範囲内である、請求項1~6のいずれかに記載の研磨パッド。
- 海成分と島径が10~2500nmの島成分からなる海島型複合繊維と、バインダー繊維とを含む不織布から、前記海成分を除去し、高分子弾性体を付与することを特徴とする研磨パッドの製造方法。
- 前記海島型複合繊維とバインダー繊維との単繊維繊度比が(海島型複合繊維:バインダー繊維)1:0.49~1:0.70の範囲内である、請求項8に記載の研磨パッドの製造方法。
- 前記不織布がニードルパンチ不織布である、請求項8または請求項9に記載の研磨パッドの製造方法。
- 前記不織布の目付けが300~600g/m2の範囲内である、請求項8~10のいずれかに記載の研磨パッドの製造方法。
- 前記不織布においてタテまたはヨコ方向の引張強度が100N/cm以上である、請求項8~11のいずれかに記載の研磨パッドの製造方法。
- さらに表面を起毛する、請求項8~12のいずれかに記載の研磨パッドの製造方法。
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MYPI2019002234A MY196278A (en) | 2016-11-16 | 2017-11-07 | Polishing Pad and Method for Manufacturing Same |
EP17872230.2A EP3542957B1 (en) | 2016-11-16 | 2017-11-07 | Polishing pad and method for manufacturing same |
US16/345,465 US11577359B2 (en) | 2016-11-16 | 2017-11-07 | Polishing pad and method for manufacturing same |
CN201780070421.3A CN110023034B (zh) | 2016-11-16 | 2017-11-07 | 研磨垫及其制造方法 |
KR1020197013350A KR102230016B1 (ko) | 2016-11-16 | 2017-11-07 | 연마 패드 및 그의 제조 방법 |
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Also Published As
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EP3542957A4 (en) | 2020-07-08 |
TWI736706B (zh) | 2021-08-21 |
TW201825233A (zh) | 2018-07-16 |
CN110023034A (zh) | 2019-07-16 |
MY196278A (en) | 2023-03-24 |
CN110023034B (zh) | 2021-04-30 |
EP3542957B1 (en) | 2021-04-28 |
KR102230016B1 (ko) | 2021-03-19 |
JPWO2018092630A1 (ja) | 2019-06-24 |
US11577359B2 (en) | 2023-02-14 |
JP6640376B2 (ja) | 2020-02-05 |
KR20190059975A (ko) | 2019-05-31 |
EP3542957A1 (en) | 2019-09-25 |
US20190270177A1 (en) | 2019-09-05 |
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