WO2012147312A1 - 研磨フィルム - Google Patents
研磨フィルム Download PDFInfo
- Publication number
- WO2012147312A1 WO2012147312A1 PCT/JP2012/002703 JP2012002703W WO2012147312A1 WO 2012147312 A1 WO2012147312 A1 WO 2012147312A1 JP 2012002703 W JP2012002703 W JP 2012002703W WO 2012147312 A1 WO2012147312 A1 WO 2012147312A1
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- WIPO (PCT)
- Prior art keywords
- polishing
- abrasive particles
- film
- layer
- optical fiber
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
- B24D3/28—Resins or natural or synthetic macromolecular compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/22—Single-purpose machines or devices for particular grinding operations not covered by any other main group characterised by a special design with respect to properties of the material of non-metallic articles to be ground
- B24B19/226—Single-purpose machines or devices for particular grinding operations not covered by any other main group characterised by a special design with respect to properties of the material of non-metallic articles to be ground of the ends of optical fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/11—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
- B24B37/245—Pads with fixed abrasives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
- B24D3/342—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
- B24D3/344—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent the bonding agent being organic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
- B24D3/346—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties utilised during polishing, or grinding operation
Definitions
- the present invention relates to an abrasive film. More specifically, the present invention relates to a polishing film used for polishing a polishing surface of an object to be polished (such as an optical fiber, an optical lens, and a magnetic disk substrate).
- a polishing film used for polishing a polishing surface of an object to be polished such as an optical fiber, an optical lens, and a magnetic disk substrate.
- an optical fiber connector that can be easily detached has been widely used as a connection member between optical fibers in an optical fiber communication network.
- the connection end faces ⁇ the end faces of the optical fiber main body (glass fiber) and the end faces of the ferrule made of zirconia, for example, covering the optical fiber main body ⁇ are directly connected. Connect in a butted state.
- connection end surfaces of the optical fiber connector to be connected are scratched or scratched. It is important to polish accurately so that a smooth surface with a sufficiently reduced state (for example, a defect such as an edge portion of the polished surface) can be obtained.
- the polishing of the connection end face of such an optical fiber connector is performed by a plurality of steps of a rough finish polishing step, a medium finish polishing step, and a final finish polishing step. Affixed to the upper elastic pad and fixed, and polishing process is performed by rotating and sliding the polishing surface plate while pressing the connection end face of the optical fiber connector against the surface of the polishing material through a polishing liquid such as water. .
- Patent Document 1 to Patent Document 3 As an abrasive used in this final finish polishing step, for example, in Patent Document 1 to Patent Document 3, a polishing film having an abrasive layer containing at least abrasive particles and a binder resin and a base material supporting the abrasive layer (or through Has been proposed.
- the optical fiber body in the optical fiber connector contains SiO 2 , so that after polishing.
- Abrasive particles containing SiO 2 may adhere to the end face of the optical fiber body. If such adhesion occurs, scratches and scratches (for example, defects on the edge of the polished surface, etc.) will occur, and after connection Optical loss may occur at the connecting end faces of the optical fibers.
- filtered water obtained by performing only filtration for removing foreign substances without using ion exchange and distillation is used as the polishing liquid, not ultrapure water or purified water.
- the abrasive particles containing SiO 2 that have fallen from the polishing layer are aggregated due to the influence of impurity ions in the filtered water, and the dispersibility thereof is hindered.
- the amount of abrasive particles containing SiO 2 on the end face may increase.
- the attached abrasive particles are difficult to remove, causing scratches and scratches (for example, defects in the edge portion of the polished surface), and there is a problem that optical loss may occur at the connection end surfaces of the optical fibers after connection.
- the object of the present invention is that even when water containing impurity ions is used as the polishing liquid, it is difficult for the abrasive particles containing SiO 2 to adhere to the polished surface such as the end face of the optical fiber body after polishing. It is an object of the present invention to provide a polishing film capable of realizing a good polishing finish quality that hardly causes light loss due to scratches (scratches) or flickering (for example, defects such as edge portions of the polishing surface).
- abrasive particles containing SiO 2 when using abrasive particles containing SiO 2 and using water containing impurity ions as the polishing liquid, abrasive particles containing SiO 2 on the polished surface of the object to be polished such as the end face of the optical fiber body after polishing. It is a general recognition of those skilled in the art that conventional adhesion can easily cause scratches and scratches on the polished surface (eg, defects on the edge of the polished surface, etc.). It was.
- the present inventors have obtained abrasive particles containing SiO 2 in the polishing layer, despite the general recognition of those skilled in the art. Even if water containing impurity ions is used as a polishing liquid, if an adhesion inhibitor containing a phosphorus compound is used in the polishing layer, SiO 2 on the polishing surface of the object to be polished such as the end face of the optical fiber body after polishing is used. It has been found that the adhesion of the abrasive particles contained therein can be suppressed, and has reached the present invention.
- the present invention A polishing layer disposed on the surface of the base material, and the base material, and comprising an abrasive particle containing SiO 2 , a binder resin and an anti-adhesive agent containing a phosphorus compound; Having at least It is related with the abrasive film characterized by these.
- the polishing sheet of the present invention has a configuration having an adhesion inhibitor containing a phosphorus compound in the polishing layer. Since this phosphorus compound has the ability to form a chelate, even if water containing impurity ions is used as a polishing liquid, it contains SiO 2 that has fallen from the polishing layer in order to adsorb the impurity ions by chelating with the impurity ions. Aggregation of the abrasive particles due to the influence of the impurity ions and adhesion to the polished surface of the object to be polished can be suppressed.
- the anti-adhesive agent containing the phosphorus compound improves the dispersibility of the abrasive particles containing the detached SiO 2, and can effectively suppress the abrasive particles from aggregating and adhering to the polished surface. .
- the phosphorus compound is a compound having a phosphate group and / or a phosphonic acid group, Is preferred.
- the polishing film of the present invention having such a configuration is used, the phosphoric acid group and / or the phosphonic acid group can easily form a chelate between the phosphorus compound and the impurity ions, and thus the dispersed dispersion of the abrasive particles containing the detached SiO 2. It is possible to more reliably prevent the abrasive particles from being aggregated and easily attached to the polished surface.
- the polishing film of the present invention is For an object to be polished containing SiO 2 ; Is preferred.
- the object to be polished containing SiO 2 include an optical fiber, an optical fiber connector, an optical lens, and a magnetic disk substrate.
- the abrasive particles containing SiO 2 can be dropped from both the polishing layer and the object to be polished, but the dispersibility of the abrasive particles containing SiO 2 dropped from any of them is improved, Since it can suppress effectively that the said abrasive particle aggregates and it becomes easy to adhere to a grinding
- the optical fiber main body in the optical fiber connector contains SiO 2 Polishing particles containing SiO 2 are less likely to agglomerate and adhere to the end face (polishing surface) of the optical fiber body after polishing, and scratches and scratches (eg, defects in the edge portion of the polishing surface) occur on the polishing surface. And the optical loss in the connection end surface of the optical fibers after a connection can be suppressed effectively.
- the polishing liquid even when water containing impurity ions is used as the polishing liquid, it is difficult for the abrasive particles containing SiO 2 to adhere to the polishing surface of the object to be polished, and scratches (scratches) ( It is possible to obtain a polishing film that can realize a good polishing finish quality that hardly causes optical loss due to defects.
- FIG. 1 is a schematic cross-sectional view showing the basic configuration of an embodiment of the polishing film of the present invention.
- a polishing film 1 of the present embodiment shown in FIG. 1 is mainly disposed on a substrate 2 and one surface of the substrate 2, and includes abrasive particles 3a containing SiO 2 , a binder resin 3b, and a phosphorus compound. And a polishing layer 3 having an adhesion preventing agent 3c.
- FIG. 1 conceptually shows the structure of the abrasive film 1 of the present invention.
- the ratio of the abrasive particles 3a is overwhelmingly high, and the anti-adhesive agent 3c is dissolved. They may be attached to the abrasive particles 3a or may exist independently in the binder resin 3b.
- the base material 2 is a member for supporting and fixing the polishing layer 3.
- the substrate 2 shown in FIG. 1 has a film-like or sheet-like shape having a first main surface S1 and a second main surface S2 facing each other substantially in parallel.
- the polishing layer 3 is disposed on the first main surface S1 of the substrate 2.
- Such a substrate 2 has an appropriate rigidity, supports the polishing layer 3, and has good adhesion and adhesion with the polishing layer 3 when polishing an object to be polished such as an optical fiber connector. If it is ensured, it will not specifically limit,
- polishing film can be used.
- thermoplastic resin As the constituent material of the substrate 2, a known thermoplastic resin can be preferably used, and for example, acrylic resin, polycarbonate, polyethylene terephthalate (PET), polypropylene, polyethylene, or the like can be preferably used.
- PET polyethylene terephthalate
- polypropylene polyethylene
- polyethylene or the like
- a biaxially stretched film such as polyethylene terephthalate (PET), polypropylene, or polyethylene can also be used.
- the thickness of the substrate 2 may be appropriately set according to the use of the polishing film 1.
- the thickness of the substrate 2 is preferably 30 ⁇ m to 150 ⁇ m from the viewpoint of convenience (easy handling).
- a corona treatment or primer is applied to the first main surface S1.
- Surface treatment such as treatment may be performed.
- the first main surface S1 of the substrate 2 can be finely roughened to increase the surface area, and together with the anchor effect and the like, the first main surface S1 and the polishing layer 3 It is possible to improve the adhesion and adhesion.
- the constituent material of the primer treatment layer formed by the primer treatment is not particularly limited as long as the adhesion and adhesion between the substrate 2 and the polishing layer 3 can be ensured.
- Polyester resins or acrylic resins for example, see JP-B-54-43017
- resins obtained by grafting an unsaturated bond-containing compound to a water-soluble or water-dispersible hydrophilic group-containing polyester resin for example, Japanese Patent Application Laid-Open 2-310048
- the thickness of the primer treatment layer may be appropriately set according to the use of the polishing film 1.
- the thickness of the primer treatment layer is 0.3 ⁇ m to 0.8 ⁇ m from the viewpoint of convenience (easy handling). Is preferred.
- the polishing layer 3 is a layer provided for polishing an object to be polished.
- the polishing layer 3 has a configuration mainly including polishing particles 3a containing SiO 2 , a binder resin 3b, and an adhesion preventing agent 3c containing a phosphorus compound.
- the polishing layer 3 has the effect of the present invention described above (improving the dispersibility of the abrasive particles 3a containing the detached SiO 2 and suppressing the abrasive particles 3a from aggregating and adhering to the polishing surface). From the viewpoint of obtaining more reliably, an anti-adhesive agent 3c that forms a chelate with impurity ions in the polishing liquid that causes aggregation of the abrasive particles 3a and adhesion to the polishing surface, and suppresses adhesion of the polishing particles 3a to the polishing surface. It has the feature in the point containing.
- the polishing layer 3 is viewed from the cross-sectional direction (that is, a vertical cross section in a substantially normal direction of the first main surface S1 and the second main surface S2 is defined as the first main surface S1. And when viewed from a direction substantially parallel to the second main surface S2, it has a continuous layer shape with a certain thickness.
- continuous or discontinuous grooves may be provided on the surface of the polishing layer 3.
- the polishing layer 3 may be divided into a plurality of portions. For example, when viewed from a substantially normal direction of the first main surface S1 and the second main surface S2 of the base material 10, a polishing structure having a surface having a substantially rectangular shape or a substantially hexagonal shape has a groove therebetween. It may be a polishing layer having a configuration in which two or more are juxtaposed. At this time, the groove formed between the two or more polishing structures is formed continuously or discontinuously over the entire polishing layer, and the bottom of the groove is formed to reach the surface of the substrate. May be.
- Abrasive particles 3a is a member for polishing a polishing object, as long as it contains SiO 2, for example, colloidal silica (including organosilica sol dispersed in an organic solvent colloidal silica.), Dry silica, wet Various conventionally known materials such as silica and fused silica can be used.
- colloidal silica including organosilica sol dispersed in an organic solvent colloidal silica.
- Dry silica wet
- Various conventionally known materials such as silica and fused silica can be used.
- the abrasive particles 3a may have a particle size of 0.001 ⁇ m to 1 ⁇ m from the viewpoint of not including coarse particles that cause scratches and defects on the polished surface, and if the particle size is too small. From the viewpoint that the grinding efficiency does not increase and the number of particles acting on the polishing is reduced and the grinding efficiency is lowered even if the particle size is too large, the particle size is preferably 0.01 ⁇ m to 0.2 ⁇ m.
- the particle size referred to here is the median size of the particle size distribution obtained by the dynamic light scattering method, and can be implemented using, for example, a dynamic light scattering type particle size distribution measuring device manufactured by Horiba, Ltd.
- the binder resin 3b is in a state in which abrasive particles 3a and an adhesion preventive agent 3c described later are dispersed in the abrasive layer 3, and the abrasive layer 3 itself is in close contact with the first main surface S1 of the substrate 2. It is a material contained in the polishing layer 3 for supporting and fixing with.
- the binder resin 3b can ensure good dispersibility of the abrasive particles 3a and the adhesion preventing agent 3c and good adhesion and adhesion to the substrate 2 (on the primer treatment layer when a primer treatment layer is provided). If it is, it will not specifically limit, What is used as binder resin of the grinding
- binder resin 3b examples include polyurethane resin, phenol resin, epoxy resin, polyester resin, cellulose resin, ethylene copolymer, rubber resin, polyvinyl acetal resin, polyacrylic resin, polyvinyl alcohol resin, and polyvinyl chloride resin. , Polyvinyl acetate resin, polyamide resin, aminoplast resin, phenoxy resin and the like. Further, the binder resin 3b may be at least partially crosslinked.
- the polishing layer 3 may contain an additive such as a cross-linking agent (details will be described later) such as an isocyanate resin, a coupling agent, and a lubricant, depending on the type of the binder resin 3b, without impairing the effects of the present invention. It may be included in a range.
- a cross-linking agent such as an isocyanate resin, a coupling agent, and a lubricant, depending on the type of the binder resin 3b, without impairing the effects of the present invention. It may be included in a range.
- the phosphorus compound constituting the adhesion preventing agent 3c various compounds can be used as long as they form a chelate with an impurity ion contained in water used as a polishing liquid and trap the impurity ion.
- Such phosphorus compounds include inorganic phosphorus compounds and organic phosphorus compounds as long as they can form chelates with impurity ions (for example, calcium ions, sodium ions, magnesium ions, potassium ions, chloride ions, etc.) contained in water. Any of these compounds can be used, and those having a phosphate group and / or a phosphonic acid group are preferred from the viewpoint that a chelate can be formed with impurity ions more reliably.
- impurity ions for example, calcium ions, sodium ions, magnesium ions, potassium ions, chloride ions, etc.
- Examples of the inorganic phosphorus compound include phosphoric acid, phosphate, polyphosphoric acid, and polyphosphate.
- Examples of polyphosphates include polymerized inorganic phosphate compounds having two or more phosphorus atoms in the molecule, such as sodium hexametaphosphate, in which an alkali metal or alkaline earth metal and a phosphorus atom are bonded.
- Specific examples of the polyphosphate include, for example, tetrasodium pyrophosphate, disodium pyrophosphate, sodium tripolyphosphate, sodium tetrapolyphosphate, sodium heptapolyphosphate, sodium decapolyphosphate, sodium metaphosphate, sodium hexametaphosphate and potassium thereof. Examples include salts. One or more of these can be used.
- Preferred examples of the organic phosphorus compound include phosphonic acid and its derivatives.
- phosphonoacetic acid or a salt thereof 2-phosphonobutanetricarboxylic acid or a salt thereof, iminodialkylphosphonic acid such as iminodimethylphosphonic acid or the like.
- HEDP 1-diphosphonic acid
- the content of the abrasive particles 3a containing SiO 2 and the binder resin 3b in the polishing layer 3 varies depending on the equivalent of phosphoric acid groups and / or phosphonic acid groups in the phosphorus compound, but in the range not impairing the effects of the present invention, What is necessary is just to adjust suitably.
- the lower limit of the content of the phosphorus compound constituting the adhesion preventing agent 3c in the polishing layer 3 may be, for example, 0.1% by mass of the polishing layer 3, but in order to obtain the effect of the present invention more reliably. It is preferably 1% by mass.
- the upper limit value of the content of the anti-adhesive agent 3c containing the phosphorus compound in the polishing layer 3 may be appropriately selected within a range that does not impair the polishing effect of the polishing layer 3 and adhesion / adhesion to the substrate 2.
- the content of the phosphorus compound constituting the adhesion preventing agent 3 may be 0.1 to 11% by mass, preferably 1 to 7% by mass.
- the polishing film 1 of the present embodiment has a configuration having the adhesion preventing agent 3c containing a phosphorus compound in the polishing layer 3, even if water containing impurity ions is used as the polishing liquid, Since the adhesion preventing agent 3c adsorbs the impurity ions by chelating with the impurity ions, the abrasive particles 3a dropped from the polishing layer 3 aggregate due to the influence of the impurity ions and adhere to the polished surface of the object to be polished. Can be suppressed.
- the manufacturing method of the polishing film 1 of the present embodiment mainly includes a step of forming the polishing layer 3 on the first main surface S1 of the substrate 2.
- (A) Previous process In the case where the primer treatment described above is performed as a previous step on the first main surface S1 of the substrate 2, for example, a method of drying after spray-coating a primer on the first main surface S1 of the substrate 2
- the primer treatment layer is formed by a conventionally known method such as the above.
- polishing layer forming step As a method of forming the polishing layer 3 on the first main surface S1 of the base material 2 (on the primer processing layer when a primer processing layer is provided), the first main surface of the base material 2 is used.
- a well-known thin film manufacturing technique can be employed as long as sufficient adhesion and adhesion between the surface S1 (primer treatment layer when a primer treatment layer is provided) and the polishing layer 3 can be secured.
- abrasive particles 3a, binder resin 3b, anti-adhesive agent 3c, solvent, crosslinking agent and dispersant (and other additives) are mixed to prepare a coating liquid in which abrasive particles 3a are dispersed. It is applied to the first main surface S1 of the material 2 (on the primer treatment layer when a primer treatment layer is provided). Next, the polishing layer 3 can be formed by removing the solvent by drying the coating film obtained by the coating.
- the method for applying the coating liquid to the first main surface S1 of the substrate 2 is not particularly limited, and bar coating, comma coating, spray coating, reverse Known coating methods such as roll coating, knife coating, screen printing, gravure coating, and die coating can be employed.
- the cross-linking agent is for cross-linking polymer molecules constituting the binder resin 3b, and forms a configuration incorporated in the binder resin 3b after cross-linking.
- an aromatic polyisocyanate having 6 to 20 carbon atoms, 2 carbon atoms, excluding carbon in the NCO group, from the viewpoint of obtaining a hard polishing layer 3 that is difficult to be deformed during polishing work due to high reactivity.
- Preferred examples include aliphatic polyisocyanates having 18 to 18 carbon atoms, alicyclic polyisocyanates having 4 to 15 carbon atoms, and araliphatic polyisocyanates having 8 to 15 carbon atoms.
- a modified product of the above polyisocyanate (urethane group, carbodiimide group, allophanate group, urea group, burette group, uretdione group, uretoimine group, isocyanurate group, and Preferable examples also include modified products containing at least one organic group selected from the group consisting of oxazolidone groups, and the above polyisocyanate compounds. Moreover, you may use what selected 2 or more types from the polyisocyanate mentioned above, the modified polyisocyanate, and the polyisocyanate compound to make a mixture.
- the solvent is not particularly limited as long as the binder resin 3b is soluble.
- MEK methyl ethyl ketone
- isophorone terpineol
- N methylpyrrolidone cyclohexanone
- propylene carbonate toluene
- THF tetrahydrofuran
- ethyl acetate DMF (N, N-dimethylformamide), 2-propanol and the like
- MEK methyl ethyl ketone
- isophorone terpineol
- N methylpyrrolidone cyclohexanone
- propylene carbonate toluene
- THF tetrahydrofuran
- ethyl acetate ethyl acetate
- DMF N, N-dimethylformamide
- 2-propanol and the like are used. be able to.
- the dispersing agent is not particularly limited as long as it is soluble in the solvent used and can disperse the abrasive particles 3a and the adhesion preventing agent 3c in the binder resin 3b in the coating solution.
- a mask having a shape corresponding to the shape of the groove is used as the first main surface S1 of the substrate 2 (when a primer treatment layer is provided).
- the coating solution may be applied by, for example, bar coating, spray coating, screen printing, or gravure coating.
- a method of forming a groove by etching after forming the polishing layer 3 can also be used.
- polishing film of the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.
- Example 1 66 parts by weight of organosilica sol (MEK-ST manufactured by Nissan Chemical Industries, Ltd., solid content 30% by mass), which is an abrasive particle containing SiO 2, and acrylic resin (Acrynal # manufactured by Toei Kasei Co., Ltd.), which is a binder resin 3.9 parts by weight of H22-36, solid content of 29.6% by mass) and 0.5 parts by weight of isocyanate as a crosslinking agent (Sumidur L75, Sumika Bayer Urethane Co., Ltd., solid content of 75% by mass) And 0.3 part by weight of phosphoric acid (solid content: 85% by mass) as an adhesion inhibitor, 25.3 parts by weight of methyl ethyl ketone, 3.8 parts by weight of 2-propanol, and purified water (manufactured by Trusco Nakayama Co., Ltd.) The mixture was mixed with 0.2 part by weight of a mixed solvent to prepare a coating solution.
- organosilica sol ME
- the above coating solution is applied to one surface of a polyester film (Lumirror T91N manufactured by Toray Industries, Inc., thickness: 75 ⁇ m) using a bar coating method and dried at 100 ° C. in an oven.
- a polishing film 1 having a polishing layer having a thickness of 3 ⁇ m was obtained.
- the ratio (mass%) of each component in the coating solution is shown in Table 2. From this ratio and the solid content ratio of each component, the ratio of each component (solid content) in the polishing layer was obtained and shown in Table 2.
- the polishing film 1 obtained as described above is punched into a rectangular shape of 114 mm ⁇ 140 mm, and fixed to an elastic pad of a polishing machine (ATP-2100 manufactured by NTT Advanced Technology Co., Ltd.). The final finish polishing was performed for 120 seconds on the connection end surface of the optical fiber connector (SC ferrule manufactured by Seiko Giken Co., Ltd.) after the intermediate finish polishing using water that was not filtered but only filtered as a polishing liquid.
- ATP-2100 manufactured by NTT Advanced Technology Co., Ltd.
- a 1 ⁇ m diamond abrasive film (TOPX D105 manufactured by Bando Chemical Co., Ltd.) is attached to an elastic pad of a polishing machine (ATP-2100 manufactured by NTT Advanced Technology Co., Ltd.). It was carried out under the condition that it was fixed and polished using purified water (manufactured by Trusco Nakayama Co., Ltd.) as a polishing liquid for 120 seconds. Moreover, as water (polishing liquid) which only passed through filtration without passing through the above ion exchange and distillation, water prepared by removing dust with stainless steel (SUS) mesh (# 400) from industrial water (Kobe City). Used (no distillation or ion exchange).
- This polishing liquid was 0.15 mS / cm as measured by an electric conductivity meter CM-20S manufactured by Toa DKK Co. (The polishing liquid is shown in Table 1 below. Impurity ions were included, and detailed measurement methods and results of impurity ions are shown in Table 1.
- Example 5 A polishing film 5 was prepared and evaluated in the same manner as in Example 1 except that phosphonoacetic acid (manufactured by Wako Pure Chemical Industries, Ltd.) was used in place of phosphoric acid as an adhesion inhibitor. The results are shown in Table 3.
- Example 6 A polishing film 6 was prepared and evaluated in the same manner as in Example 1 except that a cellulose resin (Etocel 100 manufactured by Nihon Kasei Co., Ltd.) was used instead of the acrylic resin as the binder resin. The results are shown in Table 4.
- a cellulose resin Etocel 100 manufactured by Nihon Kasei Co., Ltd.
- the polishing film of the present invention can be suitably used for polishing polished surfaces of objects to be polished such as optical fibers, optical lenses and magnetic disk substrates.
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Abstract
Description
基材、及び
基材の表面上に配置されており、SiO2を含む研磨粒子とバインダー樹脂とリン化合物を含む付着防止剤とを有する研磨層、
を少なくとも有すること、
を特徴とする研磨フィルム
に関する。
リン化合物が、リン酸基及び/又はホスホン酸基を有する化合物であること、
が好ましい。
SiO2を含む被研磨物用であること、
が好ましい。
SiO2を含む被研磨物としては、例えば光ファイバ、光ファイバコネクタ、光学レンズ、磁気ディスク基板等が挙げられる。
2・・・基材、
3・・・研磨層、
3a・・・研磨粒子、
3b・・・バインダー樹脂、
3c・・・付着防止剤。
図1は本発明の研磨フィルムの一実施形態の基本構成を示す模式断面図である。図1に示す本実施形態の研磨フィルム1は、主として、基材2と、基材2の一方の表面上に配置されており、SiO2を含む研磨粒子3aとバインダー樹脂3bとリン化合物を含む付着防止剤3cとを有する研磨層3と、を有して構成されている。なお、上記のように、図1は本発明の研磨フィルム1の構造を概念的に示すものであり、実際には研磨粒子3aの比率が圧倒的に高く、また、付着防止剤3cは、溶解していてもよく、研磨粒子3aに付着しているものでも、バインダー樹脂3b内で独立して存在しているものであってもよい。
次に、本実施形態の研磨フィルム1の製造方法の一例について説明する。本実施形態の研磨フィルム1の製造方法は、主として、基材2の第一の主面S1上に、研磨層3を形成する工程からなる。
基材2の第一の主面S1上に、前工程として先に述べたプライマー処理を施す場合は、例えば基材2の第一の主面S1上にプライマー剤をスプレーコートした後に乾燥する方法等の従来公知の方法によって、プライマー処理層を形成する。また、基材2の第一の主面S1上にプライマー処理層が予め設けられた市販品を基材2として使用してもよい。
基材2の第一の主面S1(プライマー処理層を設ける場合にはプライマー処理層上)に研磨層3を形成する方法としては、基材2の第一の主面S1(プライマー処理層を設ける場合にはプライマー処理層)と研磨層3との接着性・密着性を十分に確保できる範囲で公知の薄膜製造技術を採用することができる。
SiO2を含む研磨粒子であるオルガノシリカゾル(日産化学工業(株)製のMEK-ST、固形分30質量%)66重量部と、バインダー樹脂であるアクリル樹脂(東栄化成(株)製のアクリナール#H22-36、固形分29.6質量%)3.9重量部と、架橋剤であるイソシアネート(住化バイエルウレタン(株)製のスミジュールL75、固形分75質量%)0.5重量部と、付着防止剤であるリン酸(固形分85質量%)0.3重量部と、を、メチルエチルケトン25.3重量部、2-プロパノール3.8重量部及び精製水(トラスコ中山(株)製)0.2重量部の混合溶媒に混合し、塗布液を調製した。
上記のようにして得た研磨フィルム1を、114mm×140mmの矩形型に打ち抜き、研磨機(NTTアドバンステクノロジー(株)製のATP-2100)の弾性体パッドに貼り付けて固定し、イオン交換及び蒸留を経ず濾過のみを経た水を研磨液として用い、中仕上げ研磨後の光ファイバコネクタ((株)精工技研製のSCフェルール)の接続端面に対する最終仕上げ研磨を120秒間行った。
各成分の比率を表2に示す値に変更した以外は、上記実施例1と同様にして、研磨フィルム2~4及び比較研磨フィルム1を作製し、評価試験を行った。結果を表2に示した。また、比較研磨フィルム1については、評価試験において撮影した写真(400倍)を図3に示した。
付着防止剤としてリン酸に代えてホスホノ酢酸(和光純薬工業(株)製)を用いた以外は、上記実施例1と同様にして、研磨フィルム5を作製し、評価試験を行った。結果を表3に示した。
バインダー樹脂としてアクリル樹脂に代えてセルロース樹脂(日進化成(株)製のエトセル100)を用いた以外は、上記実施例1と同様にして、研磨フィルム6を作製し、評価試験を行った。結果を表4に示した。
Claims (3)
- 基材、及び
前記基材の表面上に配置されており、SiO2を含む研磨粒子とバインダー樹脂とリン化合物を含む付着防止剤とを有する研磨層、
を少なくとも有すること、
を特徴とする研磨フィルム。 - 前記リン化合物が、リン酸基及び/又はホスホン酸基を有する化合物であること、
を特徴とする請求項1に記載の研磨フィルム。 - SiO2を含む被研磨物用であること、
を特徴とする請求項1又は2に記載の研磨フィルム。
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