WO2007119775A1 - ガラス基板の加工方法及びガラス基板加工用リンス剤組成物 - Google Patents
ガラス基板の加工方法及びガラス基板加工用リンス剤組成物 Download PDFInfo
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- WO2007119775A1 WO2007119775A1 PCT/JP2007/058050 JP2007058050W WO2007119775A1 WO 2007119775 A1 WO2007119775 A1 WO 2007119775A1 JP 2007058050 W JP2007058050 W JP 2007058050W WO 2007119775 A1 WO2007119775 A1 WO 2007119775A1
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- alkali metal
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- magnesium
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
- G11B5/8404—Processes or apparatus specially adapted for manufacturing record carriers manufacturing base layers
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C19/00—Surface treatment of glass, not in the form of fibres or filaments, by mechanical means
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C23/00—Other surface treatment of glass not in the form of fibres or filaments
- C03C23/0075—Cleaning of glass
Definitions
- the present invention can efficiently remove abrasives and polishing debris adhering to the surface of a glass substrate polished with an abrasive such as cerium oxide and colloidal silica, and reduce the surface roughness of the polished surface. It is related with the processing method of a glass substrate, and the rinse agent composition used for the method. This application claims priority on April 14, 2006, based on Japanese Patent Application No. 2006-111934 filed in Japan, the contents of which are incorporated herein by reference.
- cerium oxide-based abrasive a polishing composition containing cerium oxide as a main component
- cerium oxide-based abrasive a polishing composition containing cerium oxide as a main component
- a slurry of abrasive material is allowed to flow between a work table and a surface plate with a urethane-type pad or a thread-type pad, and a relative load is applied. This is done by giving exercise.
- glass substrates are finished by performing such polishing in multiple stages.
- Oxidized cerium-based abrasives are capable of obtaining high polishing speeds. Abrasives with high adhesion to the glass surface, and polishing residue such as glass debris remains on the glass surface and immediately after polishing. The cleaning process has been devised.
- Patent Document 1 discloses a method of rinsing a glass substrate by rotating a disk-shaped glass substrate after mirror polishing at a low speed in a horizontal plane on a turntable and discharging pure water from the upper side of the glass substrate. Has been. However, it is not possible to remove the abrasive material sufficiently by washing with water alone.
- Patent Document 2 discloses a method of removing an abrasive adhered to a glass substrate by immersing the glass substrate in phosphoric acid at 80 ° C to 90 ° C, and then heating sulfuric acid and peracid.
- a method of removing metal or organic matter adhering to a glass substrate by immersing the glass substrate in a mixture with hydrogen water is disclosed.
- Patent Document 3 describes hydrofluoric acid, sulfuric acid, and nitric acid.
- a method is disclosed in which a polished glass substrate is immersed in a mixed acid solution with an acid having equal strength such as phosphoric acid, and subjected to ultrasonic cleaning to remove abrasive particles remaining on the glass substrate.
- Water polishing is a method in which the abrasive slurry supplied to the polishing apparatus is switched to water (also called a rinse agent) for polishing.
- water also called a rinse agent
- rinsing with water sometimes did not remove the abrasive material such as cerium oxide.
- a squeak from the vicinity of the workpiece sometimes called “squeal”, may occur.
- Patent Document 6 discloses a composition containing a basic salt of magnesium such as magnesium hydroxide, magnesium carbonate, basic magnesium carbonate, magnesium phosphate, cerium oxide, zirconium oxide, iron oxide, A method of polishing glass polished with an abrasive such as silicon dioxide silicon is disclosed.
- this method has a problem that the number of processing machines increases because the polished one is re-polished.
- Patent Document 6 when particles are settled inside a polishing machine having a large particle size of magnesium hydroxide and used as a rinsing agent, it is easy to be mixed into an acid cerium-based abrasive. I have a problem.
- Patent Document 7 discloses a polishing composition containing an abrasive and a polishing accelerator comprising an aluminum salt containing an oxidizing group and a magnesium salt containing an oxidizing group.
- This polishing composition is used for polishing work pieces made of metal or carbon, which are susceptible to being attacked by an acid or an oxidant, due to the oxidizing action of ions having an oxidizing power or the hydrolysis of aluminum ions. It is used as an accelerator and does not remove abrasive particles adhering to the glass substrate.
- Patent Document 8 contains a salty magnesium salt in an abrasive mainly composed of cerium oxide.
- An abrasive for polishing glass is disclosed.
- Patent Document 8 teaches that a glass substrate with few latent scratches can be obtained with this abrasive, but this abrasive does not remove abrasive particles adhering to the glass substrate.
- Patent Document 1 Japanese Patent Application Laid-Open No. 8-153344
- Patent Document 2 Japanese Patent Laid-Open No. 9-227170
- Patent Document 3 Japanese Unexamined Patent Publication No. 2000-140778
- Patent Document 4 Japanese Unexamined Patent Application Publication No. 2002-109727
- Patent Document 5 Japanese Unexamined Patent Publication No. 2000-343390
- Patent Document 6 JP-A-11-209745
- Patent Document 7 Japanese Patent Laid-Open No. 9-100465
- Patent Document 8 Japanese Patent Laid-Open No. 3-146585
- An object of the present invention is to efficiently remove abrasives and polishing debris adhering to the surface of a glass substrate polished with an abrasive such as cerium oxide and colloidal silica, and load the subsequent cleaning process.
- an abrasive such as cerium oxide and colloidal silica
- the present inventor has found that an aqueous solution of a water-soluble magnesium compound immediately before or after completion of polishing; a water-soluble magnesium compound and an alkali metal hydroxide; An aqueous solution of at least one selected from the group consisting of an alkali metal carbonate and an alkali metal hydrogen carbonate; or a water-soluble magnesium compound and an alkali metal hydroxide, an alkali metal carbonate and an alkali metal hydrogen carbonate.
- a rinse agent composition having a specific pH that also has a suspension power containing colloidal particles obtained by reacting in water with at least one selected from the group consisting of abrasives and debris adhering to the glass surface It was found that the surface roughness of the polished surface can be significantly reduced.
- the present invention is further based on these findings. It has been studied and completed.
- the present invention is as follows.
- a rinse agent composition having a pH of 7 or more and 12 or less
- a method of processing a glass substrate comprising: supplying one rinse agent composition selected from the group that also has a force to rinse the glass substrate.
- the present invention is preferably as follows.
- [3] Water-soluble magnesium compound power The method for processing a glass substrate according to the above [1] or [2], which is magnesium chloride, magnesium sulfate, or magnesium nitrate.
- the rinse agent composition has a total magnesium concentration in the composition of ImmolZL to: LmolZL, the substance amount Y (mol) of the hydroxyl group in the alkali metal hydroxide, and the magnesium substance in the water-soluble magnesium compound
- the rinse agent composition has a total magnesium concentration in the composition of ImmolZL to: LmolZL, and the substance amount Y (mol) of the hydroxyl group in the alkali metal hydroxide and the water-soluble magnesium compound
- the ratio (YZX) of magnesium to the substance amount X (mol) is 0.001 or more and 2 or less, and further contains an alkali metal carbonate or bicarbonate, Glass substrate processing method.
- the rinse agent composition has a total magnesium concentration in the composition of ImmolZL: LmolZL
- the rinse agent composition has a total magnesium concentration in the composition of 7 mmol ZL to LmolZL, the amount X (mol) of magnesium in the water-soluble magnesium compound, and the hydroxyl groups in the alkali metal hydroxide.
- the method for processing a glass substrate according to [6] further comprising particles.
- the rinse agent composition has a total magnesium concentration in the composition of 150 mmol ZL to LmolZ L, the amount X (mol) of magnesium in the water-soluble magnesium compound, and the hydroxyl groups in the alkali metal hydroxide.
- the rinse agent composition has a total magnesium concentration in the composition of ImmolZL to: LmolZL, the amount of magnesium X (mol) in the water-soluble magnesium compound, and the hydroxyl groups in the alkali metal hydroxide.
- the amount of substance Y (mol) and the mass Z '(mol) of carbonate group in the alkali metal carbonate satisfy the relationship of force XZ2 ⁇ Y ⁇ X and ⁇ 2 ⁇ ' ⁇ 3 ⁇ 4, and they are The method for processing a glass substrate according to [5] above, which is a liquid that may further contain colloidal particles obtained by reaction.
- the rinse agent composition has a total magnesium concentration in the composition of 7 mmol ZL to LmolZ L, the amount X (mol) of magnesium in the water-soluble magnesium compound, and the hydroxyl group in the alkali metal hydroxide.
- the method for processing a glass substrate according to the above [9] further comprising colloidal particles obtained by heating.
- the present invention is as follows.
- a rinse agent composition having ⁇ of 7 or more and 12 or less
- Suspension containing colloidal particles obtained by reacting a water-soluble magnesium compound with at least one selected from the group consisting of an alkali metal hydroxide, an alkali metal carbonate and a hydrogen carbonate power in water.
- One rinse agent composition for glass substrate processing chosen from the group which also has force.
- this invention is as follows.
- Water-soluble magnesium compound power The rinsing agent composition for glass substrate processing according to the above [12], which is magnesium chloride, magnesium sulfate, or magnesium nitrate.
- the total magnesium concentration in the composition is ImmolZL to: LmolZL, the amount of hydroxyl group substance Y (mol) in the alkali metal hydroxide, and the amount of magnesium substance in the water-soluble magnesium compound
- the total magnesium concentration in the composition is lmmolZL to lmolZL, and the substance amount Y (mol) of the hydroxyl group in the alkali metal hydroxide and the substance amount X (mol) of magnesium in the water-soluble magnesium compound.
- the total magnesium concentration in the composition is 1 mmol ZL to 1 mol ZL, and the substance amount X (mol) of magnesium in the water-soluble magnesium compound and the substance amount Y of hydroxyl group in the alkali metal hydroxide Y ( mol) and the amount Z (mol) of carbonate group in alkali metal hydrogen carbonate and the force 5XZ4 ⁇ Y ⁇ 3XZ2 and ⁇ 2 ⁇ 3 ⁇ 4, and colloids obtained by reacting them in water.
- the rinsing composition for glass substrate processing according to the above [15] which may further contain particle-like particles.
- the total magnesium concentration in the composition is 1 mmol ZL to 1 mol ZL, and the substance amount X (mol) of magnesium in the water-soluble magnesium compound and the substance amount Y of hydroxyl group in the alkali metal hydroxide ( mol) and the substance amount Z '(mol) of the carbonate group in the alkali metal carbonate satisfy the relationship of XZ2 ⁇ Y ⁇ X and ⁇ / 2 ⁇ ' ⁇ 3 ⁇ / 4.
- the rinsing agent composition for glass substrate processing according to the above [15] which may further contain colloidal particles obtained by reacting in water.
- the total magnesium concentration in the composition is 150 mmol ZL to lmol ZL, and the substance amount X (mol) of magnesium in the water-soluble magnesium compound and the substance amount Y (mol) of hydroxyl group in the alkali metal hydroxide,
- the rinse agent composition for glass substrate calories as described in said [19].
- the rinse agent composition of the present invention Since the rinse agent composition of the present invention has almost no polishing action, it is possible to attach an abrasive or the like while maintaining the dimensional accuracy and end shape of the highly accurate polishing surface produced by the polishing cache. Only kimono can be removed. Further, when the rinse agent composition of the present invention is used, the squeaking noise “squeal” from the workpiece is greatly reduced as compared with water polishing. In particular, the effect of reducing “squeal” is prominently exhibited in the rinsing agent composition comprising a suspension powder containing colloidal particles. Furthermore, it is unclear whether this is due to the reduction of “squeal” here, but the amount of scratches on the glass substrate can be greatly reduced, which is extremely effective in improving the quality of the glass substrate.
- the glass substrate processing method of the present invention includes a step of polishing a glass substrate and a step of rinsing the glass substrate.
- Glass substrates used for computer hard disks, etc. have high smoothness, It is required that there is no deposit.
- the processing method of the present invention is preferably used for such a hard glass substrate for hard disks.
- the lapped glass substrate is usually polished by a two-stage polishing process to be processed into a glass substrate having a low surface roughness surface.
- polishing is performed using, for example, a hard urethane pad in the first-stage polishing process, and polishing is performed using, for example, a suede pad in the second-stage polishing process (both the final polishing process!).
- the abrasive used in the polishing process is not particularly limited, but an acid-cerium-based abrasive, an acid-cathenium-based abrasive, or a mixture thereof is preferred, and particularly an acid-cerium-based abrasive. Is preferred.
- the rinsing process described later may be performed immediately before or after the completion of the first stage polishing process. The effect is remarkable and preferable.
- the rinse agent composition of the present invention used in the rinsing process includes (1) an aqueous solution of a water-soluble magnesium compound, (2) a water-soluble magnesium compound, an alkali metal hydroxide, an alkali metal carbonate, and an alkali metal. Or an aqueous solution with at least one selected from the group consisting of (3) a water-soluble magnesium compound, an alkali metal hydroxide, an alkali metal carbonate, and an alkali metal bicarbonate.
- a suspension containing colloidal particles obtained by reacting at least one selected from the group in water, and having a pH of 7 or more and 12 or less.
- a rinse agent composition having an aqueous solution power of a water-soluble magnesium compound and having a pH of 7 or more and 12 or less:
- the water-soluble magnesium compound examples include magnesium salts such as magnesium sulfate, magnesium nitrate, and magnesium chloride. Of these, magnesium chloride or magnesium sulfate is preferable from the viewpoint of wastewater treatment load, and sodium chloride is most preferable in view of water solubility and transportation logistics cost.
- the concentration of the water-soluble magnesium compound (total magnesium concentration in the composition) is ImmolZL ⁇ : LmolZL Preferred to be. If the concentration is too low, only cleaning results equivalent to pure water can be obtained, and the effect of the present invention tends to decrease. On the other hand, if the concentration is too high, the cerium oxide used as the abrasive tends to aggregate and it tends to be difficult to remove the cerium oxide particles remaining on the pad.
- the pH is 7 or more, comprising an aqueous solution of a water-soluble magnesium compound and at least one selected from the group consisting of alkali metal hydroxides, alkali metal carbonates and alkali metal hydrogen carbonates.
- alkali metal hydroxides examples include sodium hydroxide and potassium hydroxide.
- a water-soluble magnesium compound and an alkali metal hydroxide are the amount Y (mol) of a hydroxyl group in an alkali metal hydroxide and the mass X (mol) of a magnesium in a water-soluble magnesium compound.
- the ratio (YZX) is 0.001 or more and 2 or less.
- Examples of the alkali metal carbonate or bicarbonate include sodium carbonate and potassium carbonate; sodium bicarbonate and potassium bicarbonate. These may be used alone or in combination of two or more.
- the concentration of the water-soluble magnesium compound (total magnesium concentration in the composition) is preferably lmmolZL to lmolZL.
- the amount of the alkali metal carbonate or bicarbonate is not particularly limited.
- an aqueous solution (2) comprising a water-soluble magnesium compound and at least one selected from the group consisting of alkali metal hydroxides, alkali metal carbonates and alkali metal hydrogen carbonates is used, the above-mentioned water-soluble magnesium is used.
- a glass substrate having a polished surface with a small surface roughness is easily obtained.
- a colloidal form obtained by reacting a water-soluble magnesium compound with at least one selected from the group consisting of an alkali metal hydroxide, an alkali metal carbonate, and an alkali metal hydrogencarbonate in water.
- a rinsing agent having a pH of 7 or more and 12 or less, which also has a suspension power containing particles.
- Suspension of magnesium hydroxide powder or basic magnesium carbonate powder (saturated solubility or higher) in water does not form a suspension containing colloidal particles.
- particles that are simply suspended in the powder form particles that are not floc-like but settled hard, and in some cases, sandy precipitates.
- the rinse agent composition of the present invention is different in form from the conventional one.
- the rinse agent composition of the present invention has a total magnesium concentration of 1 mmol ZL to lmo in the composition.
- Preferred to be 1ZL If the total magnesium concentration is too low, the effect of the present invention tends to decrease. On the other hand, if the total magnesium concentration is too high, agglomeration is likely to occur when mixed with the acid-cerium colloidal silica used as an abrasive, and the acid-cerium particles remaining on the pad are removed. It tends to be difficult.
- the rinse agent composition of the present invention is neutral or alkaline, the removal of abrasive particles remaining on the pad is promoted.
- cerium oxide it is used in a neutral or alkaline environment, and therefore, in the processing method of the present invention in which the polishing force and the rinsing force are alternately repeated, a polishing calorie composition and a rinsing agent composition are used.
- the pH of the is preferably as close as possible. Specifically, pH is preferably 7 or more and 12 or less, and preferably pH 9 or more and 11.5 or less. If the pH is less than 7, the abrasive removal ability tends to decrease. If the pH exceeds 1, streak-like polishing marks tend to occur during rinsing.
- the pH is adjusted with at least one inorganic base selected from the group consisting of alkali metal hydroxides, alkali metal carbonates and alkali metal hydrogen carbonates, and organic bases such as ammonia and ammine. It can be carried out. Of these, inorganic bases are preferred.
- the rinse agent composition of the present invention may use a commercially available water-soluble magnesium compound, but a commercially available water-soluble magnesium compound may be neutral due to the influence of impurities such as pH buffering action.
- a commercially available water-soluble magnesium compound may be neutral due to the influence of impurities such as pH buffering action.
- Magnesium salt of mineral acid is a water-soluble magnesium Influence of ions contained in the water to dissolve the ⁇ beam compounds, and is easy to become unstable more P H to the influence of carbon dioxide gas in the air, the pH adjusted by the added Ca ⁇ such Mizusani ⁇ alkali It is preferable to do so.
- Adding a sufficient amount of water-soluble magnesium compound in the composition to increase the rinsing effect by adding less than the amount of water-soluble magnesium compound to make all the magnesium in the composition Can do. If the amount of the alkali metal hydroxide is too small, a stable performance as a rinsing agent having a small effect of adjusting the pH cannot be obtained. If there is too much alkali metal hydroxide, the pH will become too high, and as a result, the glass will be attacked during rinsing, and streaky polishing marks may be generated on the glass surface.
- an alkali metal carbonate or bicarbonate is preferred because it has the effect of stabilizing the pH of the rinse agent composition by the buffering action of carbonate ions.
- the pH is stabilized, the rinsing effect is stabilized, and the removal of abrasives adhering to the glass substrate is promoted.
- the ion concentration can be made higher than in the case of hydroxide alone, and the adsorption action of ions on the abrasive particles and the glass substrate surface is enhanced. It is considered that the removed abrasives are prevented from reattaching and the rinsing effect is enhanced.
- the pH of an aqueous solution in which a hydroxide and a carbonate are mixed is slightly lower than that of an aqueous solution of a water-soluble alkali alone, which is excellent in workability. I like it.
- a preferred rinse agent composition of the present invention has a total magnesium concentration in the composition of 1 mmol ZL to 1 mol ZL, and a substance amount X ( mol), the substance amount Y (mol) of the hydroxyl group in the alkali metal hydroxide, the substance amount Z (mol) of the carbonate group in the alkali metal bicarbonate, and the force 5XZ4 ⁇ Y ⁇ 3XZ2, and ⁇ 2 ⁇ It is preferable to blend to satisfy the relationship of 3/4.
- the total magnesium concentration in the composition is lmmolZL to ImolZL, and the amount of magnesium X (mol) in the water-soluble magnesium compound is , Substance amount Y (mol) of hydroxyl group in alkali metal hydroxide, substance amount Z '(mol) of carbonate group in alkali metal carbonate and force XZ2 ⁇ Y ⁇ X and X / 2 ⁇ ' ⁇ It is preferable to blend to satisfy the relationship of 3/4.
- generated this can be obtained.
- the concentration is preferably 0.01% to 2% by weight, more preferably 0.05% to 2% by weight, and 0.1% to 2% by weight.
- the acid equivalent concentration referred to here is obtained from the mass of the acid hydrate obtained by collecting the produced colloidal particles by a filtration method using a quantitative filter paper and calcining with an alumina crucible of known mass. Concentration.
- the rinse agent composition of the present invention is not particularly limited by its preparation method.
- a low-concentration water-soluble magnesium compound aqueous solution is prepared, and at least one aqueous solution selected from the group consisting of alkali metal hydroxides, alkali metal carbonates and alkali metal hydrogen carbonates is added thereto. It can be obtained by adding and precipitating fine particles to form a colloid.
- Mixing a high-concentration water-soluble magnesium compound aqueous solution with a high-concentration alkali metal hydroxide aqueous solution or an aqueous solution of an alkali metal hydroxide and an alkali metal carbonate or hydrogen carbonate mixture causes an extreme increase in viscosity. Therefore, it is not preferable.
- a salt-magnesium aqueous solution having a desired concentration is prepared, and an alkali metal hydroxide or an aqueous solution of an alkali metal hydroxide and an alkali metal carbonate or hydrogencarbonate is slowly added and mixed.
- Masashi Compared to the case where only an aqueous solution of an alkali metal hydroxide is added to an aqueous solution of a water-soluble magnesium compound, an aqueous solution of an alkali metal hydroxide and an alkali metal carbonate or an aqueous solution of a water-soluble magnesium compound is used.
- the addition of a carbonate mixture is preferred because the colloidal particles produced are less likely to solidify.
- water-soluble magnesium compound aqueous solution alkali metal hydroxide, alkali metal carbonate, and alkali metal hydrogen carbonate power are also selected. It is preferable to filter at least one aqueous solution with a high-precision filter or the like to remove foreign substances, and then mix both aqueous solutions to produce colloidal particles.
- the rinsing agent composition comprising the suspension colloid containing the colloidal particles of the present invention is preferably prepared on site for use in rinsing force. If colloidal particles are generated and then stored or transported for a long period of time, the colloidal particles will settle, and it may be difficult to redisperse the sediment and return it to a suspension. Therefore, transportation or storage of the rinse agent composition of the present invention is selected from the group consisting of an aqueous solution of a high-concentration water-soluble magnesium compound, an alkali metal hydroxide, an alkali metal carbonate, and an alkali metal bicarbonate. It is preferable to carry out by dividing into at least one aqueous solution. In addition, transportation and storage costs can be reduced by using a high-concentration aqueous solution that does not precipitate at low temperatures.
- the rinse agent composition of the present invention can obtain a sufficient rinsing effect as it is, but for the purpose of further improving the adhesion removal property, preventing pad clogging, improving roll-off, and the like.
- a water-soluble polymer such as lithium, polybutyl alcohol, and hydroxypropyl cellulose may be mixed as desired.
- a chelating substance such as ethylenediamintetraacetic acid or 1,1,1-hydroxyethylidenediphosphonic acid, or an organic acid such as oxalic acid, formic acid or acetic acid or a salt thereof is mixed as appropriate. You can also.
- the rinse agent composition of the present invention does not matter even if it contains a metal element such as aluminum, iron, or silicon at an impurity level.
- a metal element such as aluminum, iron, or silicon at an impurity level.
- These impurity elements may exist in the form of hydroxides or oxides if they do not contain a chelating substance, but they do not substantially impede the effect as a rinsing agent.
- the hydrating agent composition of iron or aluminum is not fine particles as much as possible because it is often fine particles.
- the rinse agent composition of the present invention may contain alkaline earth metal ions other than magnesium, other water-soluble metal salts, or water-insoluble metal salts.
- the rinse agent composition of the present invention is not limited to the type of glass to be polished.
- the glass examples include aluminosilicate glass, soda lime glass, soda aluminosilicate glass, aluminoporosilicate glass, polosilicate glass, quartz glass, chain silicate glass, and glass ceramic such as crystallized glass.
- the method of rinsing using the rinse agent composition of the present invention is not particularly limited.
- the abrasive slurry supplied to the polishing machine in the polishing process is changed to the phosphor of the present invention. It can carry out by switching to a soot agent composition and supplying.
- the processing pressure of the polishing machine during the rinse process with the rinse agent composition is lower than the processing pressure during the polishing process.
- Rinsuka working pressure during ⁇ E is 30 g / cm 2 or more, 70 g / cm 2 or less. If the processing pressure is too high, the workpiece may be damaged. If it is too low, the workpiece tends to jump out of the carrier.
- the rinsing time is preferably set to a time that allows the abrasive slurry to be almost completely removed. It is preferably 2 minutes or more, more preferably 5 minutes or more, and in the case of a larger processing machine, it is preferably 7 minutes or more.
- the supply amount of the rinsing agent composition is not particularly limited as long as it is an amount that can remove the abrasive and the like, but it is approximately the same as the supply amount when the cyclic polishing of acid cerium is performed. It is preferable. Since the rinse agent composition of the present invention has a low solid content concentration and a small wastewater treatment load, even if it is used in a large amount in the same manner as the amount of water used in water rinsing, the processing cost does not increase.
- the colloidal particles in the rinse agent composition of the present invention can be easily dissolved and removed with an acid.
- the acid cleaning method which is a conventional method for removing acid-cerium-based abrasives, requires strict conditions to dissolve the acid-cerium, but the rinse agent composition of the present invention is mild. Cleaning can be performed under strong conditions, and the cleaning cost can be reduced.
- An cerium oxide-based abrasive, water and a commercially available dispersant were mixed, and the abrasive was dispersed in water to prepare an abrasive slurry 1 having an abrasive concentration of 5%.
- Magnesium chloride hexahydrate (manufactured by Ako Kasei) was dissolved in water to prepare a salty magnesium aqueous solution (solution A) having a concentration of 280 mmol ZL.
- solution A a salty magnesium aqueous solution having a concentration of 280 mmol ZL.
- a 25% aqueous sodium hydroxide solution and anhydrous sodium hydrogen carbonate (Asahi Glass) are dissolved in water, and a mixed aqueous solution of 420 mmol ZL sodium hydroxide and 140 mmol ZL sodium hydrogen carbonate (B solution) ) was prepared.
- Rinse agent composition 1 was prepared by dissolving 100 ml of solution A in 19.8 L of pure water and gradually adding 100 ml of solution B with stirring.
- First-stage polished aluminosilicate glass substrate (diameter 65 mm, thickness 0.64 mm) 25 sheets, 4-way type 9B type double-sided cap with suede pad (N0058: Kanebo Co., Ltd.)
- Set on a grinder circulate and supply about 8L of slurry for polishing force 1 at 1.5LZ, processing pressure 90gZcm 2 , lower surface plate rotation speed 35 rotations Z; upper surface plate, workpiece revolution and ⁇ ⁇ Polishing calorie was performed with the rotation speed set to the standard setting value corresponding to the lower surface plate rotation speed of the processing machine.
- the processing pressure is 70 gZcm 2 and the lower surface plate rotation speed is 25 rotation Z minutes; the upper surface plate, workpiece revolution and workpiece rotation speed correspond to the lower surface plate rotation speed of the processing machine Change each to the standard setting value, and stop circulating supply of polishing slurry 1 at the same time, and replace it with 7.5 L of rinsing agent composition at a supply rate of 1.5 LZ by lPass. Rinsing was performed for a minute.
- the glass substrate After rinsing, the glass substrate is subjected to ultrasonic cleaning with an acidic cleaning agent, scrubbed with an aqueous surfactant solution, further washed with pure water, and finally spin-dried to prepare a glass substrate for evaluation. Obtained.
- the processing machine uses a brush carrier to wash the pad for 2 minutes while supplying pure water at a supply volume of 3LZ, and is used for polishing and rinsing as the second use. It was.
- the processing speed (first time) is the polishing speed of the first 25 substrates when the processing machine is used for the first time, that is, the processing speed (second time) is the processing speed of the processing machine. This is the polishing speed of the next 25 substrates when used for the second time.
- the evaluation results are shown in Table 1.
- the glass substrate for evaluation was measured for processing speed, arithmetic mean roughness (Ra) and adhesion by atomic force microscope (AFM), and edge shape by a stylus type shape measuring instrument (TencorP-12) by the following methods. I evaluated it.
- the 10 ⁇ m square of the polished surface was observed with an atomic force microscope (AFM) to determine the arithmetic average roughness (Ra).
- the processing speed ( ⁇ mZ min) was obtained by dividing the processing amount by the polishing time of 20 min.
- Machining speed ( ⁇ mZ min) Machining amount m) / 20 (min)
- the amount of processing was determined by measuring the amount of mass reduction of the glass substrate before and after processing and converting from the measured force of the amount of mass reduction using the following formula.
- Machining amount m Mass reduction (g) X 133 m / g)
- Ski jump C was defined as the state of warping upward, flat (F) for the straight state, and sagging (R) for the state of warping downward.
- Example 1 A predetermined amount of the liquid B and the liquid B prepared in Example 1 was added to pure water to prepare rinse agent compositions 2 to 5 having the formulations shown in Table 1. The same polishing slurry as in Example 1 was used, and a processing test was conducted in the same manner as in Example 1. The evaluation results are shown in Table 1.
- Example 2 According to the formulation shown in Table 2, an aqueous solution of magnesium chloride and sodium hydroxide was prepared to obtain rinse agent compositions 13-18. The same polishing slurry as in Example 1 was used, and a processing test was conducted in the same manner as in Example 1. The evaluation results are shown in Table 2.
- Example 2 A processing test was conducted in the same manner as in Example 1 except that a mixture of 14 mmol ZL magnesium chloride and 14 mmol ZL aluminum nitrate (indicated as “Mg—Al” in Table 3) was used instead of rinse agent composition 1. Carried out. The evaluation results are shown in Table 3.
- Example 3 A processing test was conducted in the same manner as in Example 1 except that a 21 mmol ZL aqueous solution of sodium hydroxide and sodium hydroxide (indicated as “NaO H” in Table 3) was used in place of the rinse agent composition 1. The evaluation results are shown in Table 3.
- a polishing slurry 3 was prepared in the same manner as in Comparative Example 4 except that the amount of added salt of magnesium chloride and magnesium was changed to 0.25% (12 mmol ZL with respect to the water of the dispersion medium). Rinse with pure water was performed in the same manner as Comparative Example 1 except that this slurry 3 was used for polishing.
- the evaluation results are
- a polishing slurry 4 was prepared in the same manner as in Comparative Example 4 except that the amount of added salt of magnesium chloride and magnesium was changed to 0.5% (24 mmol ZL with respect to the water of the dispersion medium). Rinse with pure water was performed in the same manner as in Comparative Example 1 except that this slurry 4 was used for polishing. The evaluation results are shown in Table 3.
- Example 3 A processing test was conducted in the same manner as in Example 1 except that 0.5% by mass of magnesium hydroxide suspension (indicated as “Mg” in Table 3) was used in place of the rinse agent composition 1. Carried out. The evaluation results are shown in Table 3.
- the acidic aqueous solution of the water-soluble magnesium compound (Comparative Example 2) has a lower surface roughness Ra than that obtained by rinsing with pure water. .
- the reduction of the processing speed (difference between the processing speed at the first use and the processing speed at the second use) became larger than in the example.
- the surface roughness measured by AFM was slightly increased.
- the polished surface observed by AFM showed streak-like polishing marks, resulting in inferior surface morphology of the workpiece compared to the examples.
- polishing power was evaluated using a slurry for polishing power consisting of an acid-cerium-based abrasive and salt-magnesium, and then purified water was used. When the rinsing force was applied using, the adhesion improvement effect was not seen and the processing speed was reduced.
- the glass substrates (Examples 1 to 19) obtained by applying the processing method of the present invention have a surface roughness Ra of 1.5 A or less, and the number of deposits is extremely low. You can see that It can also be seen that the rate of decrease in the processing speed after the second is low.
- polishing materials adhering to the polishing process can be removed efficiently, and the load of the subsequent cleaning process can be reduced. And the overall cost of the glass substrate polishing process can be reduced.
- a glass substrate having a polished surface with a small surface roughness can be easily obtained, which can contribute to improving the quality of the glass substrate.
- the rinsing agent composition of the present invention since the rinsing agent composition of the present invention has almost no polishing action, it maintains the dimensional accuracy and end shape of the highly accurate polished surface produced by the polishing process, and adheres to abrasives and the like. Can only get rid of.
- the rinse agent composition of the present invention when used, the squeaking noise “squeal” from the workpiece is greatly reduced as compared with water polishing.
- the effect of reducing “squeal” is prominently exhibited in the rinse agent composition of a suspension containing colloidal particles. Furthermore, it is unclear whether it is due to the reduction of “squeal” here.
- the amount of scratches on the glass substrate can be greatly reduced, which is extremely effective in improving the quality of the glass substrate, and has great industrial significance.
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- Chemical Kinetics & Catalysis (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
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Abstract
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CN200780007230.9A CN101395097B (zh) | 2006-04-14 | 2007-04-12 | 玻璃基板的加工方法以及玻璃基板加工用漂洗剂组合物 |
JP2007541521A JP4243307B2 (ja) | 2006-04-14 | 2007-04-12 | ガラス基板の加工方法及びガラス基板加工用リンス剤組成物 |
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CN103374330B (zh) | 2010-11-22 | 2015-10-14 | 日立化成株式会社 | 磨粒的制造方法、悬浮液的制造方法以及研磨液的制造方法 |
CN103500706A (zh) | 2010-11-22 | 2014-01-08 | 日立化成株式会社 | 悬浮液、研磨液套剂、研磨液、基板的研磨方法及基板 |
CN103409108B (zh) | 2010-11-22 | 2015-04-22 | 日立化成株式会社 | 悬浮液、研磨液套剂、研磨液、基板的研磨方法及基板 |
WO2013125445A1 (ja) | 2012-02-21 | 2013-08-29 | 日立化成株式会社 | 研磨剤、研磨剤セット及び基体の研磨方法 |
SG10201606827RA (en) | 2012-02-21 | 2016-10-28 | Hitachi Chemical Co Ltd | Polishing agent, polishing agent set, and substrate polishing method |
US10557059B2 (en) | 2012-05-22 | 2020-02-11 | Hitachi Chemical Company, Ltd. | Slurry, polishing-solution set, polishing solution, substrate polishing method, and substrate |
WO2013175856A1 (ja) | 2012-05-22 | 2013-11-28 | 日立化成株式会社 | スラリー、研磨液セット、研磨液、基体の研磨方法及び基体 |
WO2013175854A1 (ja) | 2012-05-22 | 2013-11-28 | 日立化成株式会社 | スラリー、研磨液セット、研磨液、基体の研磨方法及び基体 |
CN106271956A (zh) * | 2016-08-15 | 2017-01-04 | 安徽省银锐玻璃机械有限公司 | 用于玻璃磨边的复合液 |
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