WO2008069136A1 - キレート剤添加薬液の精製方法 - Google Patents
キレート剤添加薬液の精製方法 Download PDFInfo
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- WO2008069136A1 WO2008069136A1 PCT/JP2007/073192 JP2007073192W WO2008069136A1 WO 2008069136 A1 WO2008069136 A1 WO 2008069136A1 JP 2007073192 W JP2007073192 W JP 2007073192W WO 2008069136 A1 WO2008069136 A1 WO 2008069136A1
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- chelating agent
- chemical
- purifying
- added
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09G—POLISHING COMPOSITIONS; SKI WAXES
- C09G1/00—Polishing compositions
- C09G1/04—Aqueous dispersions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J41/00—Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
- B01J41/04—Processes using organic exchangers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J41/00—Anion exchange; Use of material as anion exchangers; Treatment of material for improving the anion exchange properties
- B01J41/04—Processes using organic exchangers
- B01J41/07—Processes using organic exchangers in the weakly basic form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J47/00—Ion-exchange processes in general; Apparatus therefor
- B01J47/10—Ion-exchange processes in general; Apparatus therefor with moving ion-exchange material; with ion-exchange material in suspension or in fluidised-bed form
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J47/00—Ion-exchange processes in general; Apparatus therefor
- B01J47/12—Ion-exchange processes in general; Apparatus therefor characterised by the use of ion-exchange material in the form of ribbons, filaments, fibres or sheets, e.g. membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J47/00—Ion-exchange processes in general; Apparatus therefor
- B01J47/12—Ion-exchange processes in general; Apparatus therefor characterised by the use of ion-exchange material in the form of ribbons, filaments, fibres or sheets, e.g. membranes
- B01J47/127—Ion-exchange processes in general; Apparatus therefor characterised by the use of ion-exchange material in the form of ribbons, filaments, fibres or sheets, e.g. membranes in the form of filaments or 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
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/12—Devices for exhausting mist of oil or coolant; Devices for collecting or recovering materials resulting from grinding or polishing, e.g. of precious metals, precious stones, diamonds or the like
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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
- B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
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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 at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System 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
Definitions
- the present invention relates to a method for purifying a drug solution containing a compound having a chelating ability, which is used in a semiconductor manufacturing process, and in particular, to a chelating agent from a chemical solution added with a chelating agent used in a semiconductor manufacturing process.
- the present invention relates to a method of purifying a chelating agent-added drug solution for removing a chelate complex formed from an agent and an impure metal.
- Semiconductor wafer is formed as a product through a plurality of manufacturing processes.
- a cloth abrasive cloth
- polishing is performed while circulating an abrasive slurry to the cloth.
- the slurry may contain ionized metals such as copper, nickel and iron.
- a force S using an alkali as one of the components of the abrasive slurry in particular, an alkali such as sodium hydroxide is produced by electrolysis of sodium chloride, and the sodium hydroxide produced is in the order of several ppm. Contains metallic impurities.
- the chemical mechanical polishing process of the copper film on which the copper film is formed it is dispersed in the copper force S slurry by the polishing, and a part is ionized.
- metals such as calcium, magnesium, manganese, iron, cobalt, zinc, aluminum, lead, etc. remain as residues on the surface of silicon dioxide that is difficult to diffuse inside.
- metal impurities copper and nickel, for example, penetrate silicon wafer and remain to inhibit the surface planarization such as changing the electric characteristics.
- the concentration of the easily diffused metal is on the surface. Sometimes it has to be reduced to 1/10 to 1/1000 compared to the metals that stay.
- polishing the wafer using a slurry containing metal impurities such as copper and nickel the metal diffuses into the wafer and the heat treatment and long-term storage of the wafer will be performed later. Therefore, these metals are deposited on the surface of the wafer to reduce the yield.
- impure metals such as calcium, magnesium, manganese, iron, cobalt, zinc, aluminum, lead and the like also inhibit the electrical properties and the like, these impure metals are contained in the polishing solution of the chemical mechanical polishing process. In the case of V, it becomes the load of the cleaning process of the latter stage.
- the chelating agent added to the abrasive slurry combines with the metal to form a metal complex, and the metal complex electrically repels the metal complex, thereby preventing metal contamination. Ru.
- metal complexes are also left on the surface of the wafer, they also inhibit the electrical characteristics, and therefore, if they are contained in the chemical solution and polishing liquid for the alkali etching step and polishing step, Increase the load.
- the metal contamination amount decreases as the addition amount of the chelating agent increases, and when the addition amount of the chelating agent increases, the polishing rate of the wafer decreases, and thus the chelating agent is removed. It is desirable that the addition amount of is as small as possible (see, for example, JP-A-2005-103700).
- Patent Document 1 Japanese Patent Application Laid-Open No. 63-272460
- Patent Document 2 Japanese Patent Application Laid-Open No. 2005-103700
- the inventors of the present invention have made earnest studies to solve the conventional problems with force, and have been able to remove the chelate complex from the chemical solution containing the compound having a chelating ability which is used in the semiconductor manufacturing process. As a result, it has been found that the above problems can be solved and the addition amount of the chelating agent can be minimized.
- the present invention has been made based on the findings of the present invention, and it is made from a chemical solution containing a compound having a chelating ability, which is used in a semiconductor manufacturing process, from the compound having a chelating ability and an impurity metal. By removing the chelate complex, it is possible to prevent metal contamination of the above-described An object of the present invention is to provide a method of purifying a rate agent-added chemical solution.
- Another object of the present invention is to provide a method for purifying a chelating agent-added drug solution which makes it possible to minimize the amount of added chelating agent.
- the method for purifying a chelating agent-added drug solution of the present invention is a method for purifying a drug solution containing a compound having a chelating ability, which is used in a semiconductor production process. Treatment to remove the chelate complex formed from the compound and the impure metal contained in the chemical solution.
- a chemical solution containing a compound having a chelating ability, which is used in a semiconductor manufacturing process, is usually alkaline, and contains trace amounts of various impure metals, in particular, nickel and copper as impurities, and these are included as impurities.
- a chelate complex is formed by the chelating agent added to the drug solution.
- the chemical solution to be treated which is the object of the present invention, is generally a polishing slurry for semiconductor or ammonia, tetramethylammonium, sodium hydroxide, potassium hydroxide, sodium carbonate, sodium carbonate, sodium hydrogencarbonate, potassium hydrogencarbonate. And an aqueous solution or dispersion containing at least one selected from choline, and in particular, at least one selected from ammonia, tetramethyl ammonium, sodium hydroxide, potassium hydroxide and choline is added. It is a polishing slurry for semiconductors.
- the compound having a chelating ability contained in the chemical solution to be treated of the present invention includes the chelating ability of amines, aminocarboxylic acids, hydroxylamines, phosphoric acids, thio compounds and compounds thereof.
- the thing which consists of at least 1 sort (s) chosen from the other substance which has a certain functional group is illustrated, It is not limited to these.
- a typical chelating agent is ethylenediamine tetraacetic acid (EDTA).
- organic complex adsorbent used in the present invention for example, a substance having a functional group represented by the following formula (1) is exemplified.
- R 1, R 2 and R 3 are the same or different monovalent groups selected from among a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a hydroxyl group and a hydroxypropyl group. ).
- R 1 in the formula (1) is a hydrogen atom
- R 2 and R 3 are the same or different alkyl groups having 1 to 4 carbon atoms, ie, It is preferable that R1 in the formula (1) is a hydrogen atom, and R2 and R3 are the same or different alkyl groups having 1 to 4 carbon atoms.
- substances having properties as weakly basic anion exchangers can be used as the organic complex adsorbent of the present invention.
- organic complex adsorbents are preferably formed in the form of beads, fibers or membranes.
- organic complex adsorbents are prepared by using sodium hydroxide aqueous solution in advance so that the pH change of the chemical solution to be purified becomes small by using the terminal group of the anion exchange functional group as the base type (OH type) Suitable are those consisting of anion exchangers treated with such an aqueous alkaline solution.
- the terminal group of the anion exchange functional group may be used as a main component of the liquid chemical to be treated to form a salt type.
- organic complex adsorbents are, for example, packed in a column or column with one or more kinds, and in the case of two or more kinds, packed in a mixed or laminated form, and the liquid chemical to be treated is the column or the column.
- the system may be configured to flow through the column for processing.
- system may be configured such that a plurality of these columns or towers are connected and processed by passing through the columns or towers! /.
- the organic complex adsorbent and the chemical solution to be treated are accommodated in the reaction layer, and the chemical solution to be treated is brought into contact with the organic complex adsorbent, thereby to be treated chemical solution. The Let me handle it.
- the organic complex adsorbent when the organic complex adsorbent is in the form of beads or short fibers, both can be fluidized in the reaction layer and then treated by filtering the liquid chemical to be treated, or
- the form of the organic complex adsorbent which is in the form of a fiber or in the form of a film with enhanced compactness is in the form of a pile or porous sheet, these organic complex adsorbents are arranged in layers in a reaction tank to It can be processed by passing through this layer.
- the organic complex adsorbent may be in the form of a cartridge filter.
- the slurry is supplied from a slurry supply tank in which ammonia, tetramethylammonium, sodium hydroxide, potassium hydroxide, choline and the like are dissolved to the polishing apparatus. A portion of the slurry is extracted for measurement of metal content and components, and the remainder is returned to the slurry supply tank and circulated between the slurry supply tank and the polishing apparatus.
- the slurry to be refluxed from the polishing apparatus contains a metal component
- a calculated amount of a chelating agent for chelating the metal component is added to the slurry, while the deficient component is added.
- Component preparation is performed.
- the chelate complex is contained in the slurry. It accumulates and adheres to the surface of the semiconductor device to increase the cleaning load, and the chelate complex which can not be removed by the cleaning becomes carbide in the subsequent heat treatment process and causes the generation of defects in the semiconductor device.
- the slurry containing such a chelate complex is removed by the treatment of the organic complex adsorbent.
- an organic complex adsorbent for example, an anion exchanger is used.
- the chelate complex can be removed by an anion exchanger since it is composed of a compound which releases hydrogen ions to form anions in an aqueous alkaline solution such as a carboxyl group or an aqueous dispersion. It is At this time, do not change the pH of the slurry.
- anion exchangers with tertiary ammonium groups are preferred, with weak base anion exchangers being preferred.
- the slurry from which the chelating agent and the chelate complex have been adsorbed and removed is component-adjusted and supplied again to the polishing apparatus.
- the impure metal ion in the chemical solution is removed as a chelate complex by a chelating agent, and the chelate complex is further removed out of the system by an organic complex adsorbent. It can be reduced.
- FIG. 1 is an enlarged photograph of an organic complex adsorbent used in an example of the present invention.
- the solution is added to the sample solution to have a concentration of 0.1 ppm of nickel and 0.1 ppm of copper, and a nickel chelate complex and a copper chelate. A complex was formed.
- Ultra pure water was used for all operations such as dissolution and dilution of samples in the experiment, and measurement of metal impurities was performed using ICP-AES (CIROS 120 made by Rigaku).
- Test system and tank material used PTFE (polytetrafluoroethylene) membrane holder for testing 47 ⁇ PTFE
- Shape diameter 100 m, length 2-5 mm fibrous
- Shape diameter 100 m, length 2-5 mm fibrous
- Base material Styrene 'Zivul benzene copolymer Functional group: Primary to tertiary ammoyuum group Shape: Beads having a diameter of 400 to 650 am
- Base material Styrene 'Zivurel benzene copolymer Functional group: Quaternary ammonium group (type I) Shape: bead shape with a particle diameter of 500 to 750 111
- Base material Styrene 'Zivurel benzene copolymer Functional group: Quaternary ammonium group (type II) Shape: bead shape with a particle diameter of 500 to 100 am
- Base material Styrene 'Zivulbenzene copolymer Functional group: Sulfonic acid group
- Shape Bead shape with a particle diameter of 550 ⁇ m
- Shape Bead shape with a particle size of 600 to 800 mm
- Nitro-PAPS 2_ (5_Nitro_2_pyridylazo) _5_ [N_n_propyto N_ (3_sulfopropyl) amino] phenol, disodium salt, dehydrate
- the following chelating agents are all manufactured by Chelest Co., Ltd.
- the above chelating agents are all manufactured by Dojin Chemical Laboratory.
- the adsorbents used are indicated by the above (A), (B),..., And the chelating agents are indicated by the abbreviations of the above 1, 2,.
- the ion exchangers of (A), (B), (C), (D) and (E) used for the treatment here those having a terminal group of 90% or more and an OH group were used.
- (F), (G) and (H) were used after being processed to the cation type of the main component of the treated chemical solution.
- PTFE tank (volume 1200 ml), PFA column ( ⁇ 3/4 inch, length 200 mm), container for sampling PP (polypropylene) container (volume 1000 ml), holder for PTFE membrane test-4 7 ⁇ is all metal
- PFA column ⁇ 3/4 inch, length 200 mm
- container for sampling PP polypropylene
- holder for PTFE membrane test-4 7 ⁇ is all metal
- Nitric acid used for cleaning is grade (EL) for electronic industry manufactured by Kanto Chemical Co., Ltd., diluted with ultrapure water so as to be about 1 N, and ultrapure water is an ultrapure water production system
- the metal content produced in is less than lppt.
- Table 1 shows the analysis results of the test system blank when ultrapure water was passed through this system and it was received into the PE container at the PFA column outlet. As evident from the table, there is no contamination from this system.
- the end groups were treated so that the concentration of the component of the target drug solution did not change.
- the adsorbents of (A) to (H) were packed in a PFA column ( ⁇ 3 / 4 inch, length 200 mm). The packing was done gradually while pushing the adsorbent lightly with a well-washed PTFE push rod, and packed so that the inside of the column became dense.
- Ultrapure water was passed through the PFA column packed with the adsorbent at 10 ml / min for 12 hours or more to wash away the dissolved metal and organic matter sufficiently. The water was well drained so that water droplets did not remain inside the PTFE tank, and the sample solution was poured. Connect the PTFE tank filled with the sample solution and the PFA column packed with the washed packing with a 1-inch and 4-inch PFA tube,
- a sampling vessel was installed at the PFA column outlet.
- Nitrogen gas is introduced from the top of the PTFE tank, the pressure inside the vessel is increased to 0. IMPa, the flow rate adjustment valve is operated, and the flow rate of the sample solution flowing out of the PFA column outlet is 5 ml / min or less. It was adjusted.
- the pH of the sample solution flowing out was measured with pH test paper, and when the pH was the same as the supplied sample solution, the liquid at the outlet of the PFA column was received as a sample in the PE container.
- the sample solution received in the PE container was sealed immediately, and analysis of nickel and copper was performed by ICP-AES.
- the treatment volume is 40 ml
- the sample flow rate is 5 ml / min or less
- the flow rate is 1000 ml
- the flow rate is once all. Even in the case of an aqueous alkaline solution having a force of 25 ° C. or higher at a temperature of 20 to 25 ° C. in a pass, it can be used if it has heat resistance of the used member.
- a flat membrane obtained by knitting (I) and (B) as shown in Fig. 1 is loaded on a holder for forming 45 mm of a PTFE membrane, and a copper chelate complex of EDTA is added. % Sodium hydroxide was supplied and the removal test was conducted.
- chelating agents used this time are water-soluble and dissolved as anions in an alkaline solution. It is also in the form of an anion in the form of a chelate complex with nickel and copper. This indicates that as shown in the results of Example 1, the weak basic ion exchange fiber and the weak basic ion exchange resin show strong ability to remove the chelate complex, and strongly acidic and weak acidic ion exchange. It can be confirmed that the resin showed no ability to remove the chelate complex.
- strongly basic ion exchange fibers (A) in Table 2 and strongly basic ion exchange resins (Type I) (D) in Table 5 and strongly basic ion exchange resins (Type II) (E) in Table 6 It can be seen that the removal capacity is very low or can not be confirmed. The reason for this is that the 28% ammonia water used in this example is an alkaline solution, and the chelate complex power dissolved in the sample solution in the form of anions is not adsorbed to the quaternary ammonium group. The reaction is considered to be progressing in the regeneration direction of the resin to which the hydroxide ion (OH-) in the inside is adsorbed.
- the basic ion exchange resin (type II) is stronger than the strongly basic ion exchange resin (type I) in removing ability, and the reason is that type II is more alkaline than type I. Because the degree is low, it is considered that the chelate complex is adsorbed, though in a small amount.
- the chelate fiber is formed when the chelating power with Nickenole or copper is stronger than the added chelating agent, and it can be removed by removing nickel or copper from the chelate complex! / /
- Example 2 in which a 25% aqueous solution of tetramethylammonium hydroxide was used, the concentrations of nickel and copper in the stock solution were both 0.1 ppm, while the weakly basic ion exchange was carried out as in Example 1. After treatment with resin and weak base ion exchange fiber, it became less than 0. Ol ppm, indicating that removal of nickel chelate complex and copper chelate complex is possible . Further, as in Example 1, the strongly acidic ion exchange resin, the weak acidic ion exchange resin, the strongly basic ion exchange resin (type I), the strongly basic ion exchange resin (type II) and the chelate fiber nickel as described above for the above reasons. Sufficient removal ability of chelate complex and copper chelate complex could not be obtained.
- the above processing operation was performed using a 48% aqueous sodium hydroxide solution as a sample solution.
- Example 3 using a 48% aqueous sodium hydroxide solution, the concentrations of nickel and copper in the stock solution were both 0.1 ppm, while the weakly basic ions were the same as in Examples 1 and 2 above. After the treatment with the exchange resin and the weak base ion exchange fiber, it became less than 0. 0 lppm, indicating that the nickel chelate complex and the copper chelate complex can be removed. Also, as in Examples 1 and 2, for the reasons described above, strongly acidic ion exchange resins, weak acidic ion exchange resins, strongly basic ion exchange resins (type I), strongly basic ion exchange resins ( ⁇ type) and chelates The fiber did not have sufficient ability to remove nickel chelate complexes and copper chelate complexes.
- the above processing operation was performed using a 48% aqueous potassium hydroxide solution as a sample solution.
- Example 4 in which a 48% aqueous potassium hydroxide solution was used, the concentrations of nickel and copper in the stock solution were both 0.1 ppm, as in Examples 1 to 3 above. After treatment with a weakly basic ion exchange resin and a weakly basic ion exchange fiber, it became less than 0. Ol ppm, which indicated that the nickel chelate complex and copper chelate complex can be removed. Further, as in Examples 1 to 3, the above-mentioned reasoning also applies to strongly acidic ion exchange resins, weak acidic ion exchange resins, strongly basic ion exchange resins (type I), strongly basic ion exchange resins ( ⁇ type) and chelates. In fibers, sufficient removal ability of nickel chelate complex and copper chelate complex could not be obtained.
- the above processing operation was performed using a 23% aqueous sodium carbonate solution as a sample solution.
- Example 5 using a 23% sodium carbonate solution, the concentrations of nickel and copper in the stock solution were both 0.1 ppm, while the weakly basic ions were the same as in Examples 1 to 4 above. After treatment with the exchange resin and the weak base ion exchange fiber, it was less than 0. Ol ppm, which indicated that the nickel chelate complex and the copper chelate complex can be removed. Also, as in Examples 1 to 4, the above-mentioned reasons for the strong acid ion exchange resin, weak acid ion exchange resin, strongly basic ion exchange resin (type I), strongly basic ion exchange resin ( ⁇ type) and chelates In the fiber, sufficient removal ability of the nickel chelate complex and the copper chelate complex was not obtained.
- the above processing operation was performed using a 50% aqueous potassium carbonate solution as a sample solution.
- Example 6 in which 50% potassium carbonate solution was used, the concentrations of nickel and copper in the stock solution were both 0.1 ppm, while the weakly basic ion exchange resin and the weak acid as in Examples 1 to 5 above. After treatment with basic ion exchange fiber, it became less than 0. Ol ppm, which indicated that removal of nickel chelate complex and copper chelate complex is possible. Also, as in Examples 1 to 5, the above-mentioned reasons for the strong acid ion exchange resin, weak acid ion exchange resin, strongly basic ion exchange resin (type I), strongly basic ion exchange resin ( ⁇ type) and chelates In the fiber, sufficient removal ability of the nickel chelate complex and the copper chelate complex was not obtained.
- the above processing operation was performed using an 8% aqueous sodium hydrogen carbonate solution as a sample solution.
- Example 7 using an 8% sodium hydrogencarbonate solution, the concentrations of nickel and copper in the stock solution were both 0.1 ppm, while the weak base was the same as in Examples 1 to 6 above. After treatment with anion exchange resin and weak base ion exchange fiber, the concentration was less than 0. Ol ppm, which indicated that removal of nickel chelate complex and copper chelate complex is possible. Further, similar to Examples 1 to 6, the above reasons are also strong acid ion exchange resin, weak acid ion exchange resin, strongly basic ion exchange resin (type I), strongly basic ion exchange resin ( ⁇ type) and chelate. In fibers, sufficient removal ability of nickel chelate complex and copper chelate complex could not be obtained.
- Example 8 using a 50% potassium hydrogen carbonate solution, the concentrations of nickel and copper in the stock solution were both 0.1 ppm, while the weakly basic ion exchange resin was the same as in Examples 1 to 7 above. And after treatment with weak base ion exchange fiber, it became less than 0. Ol ppm, which indicated that removal of nickel chelate complex and copper chelate complex is possible. Further, similar to Examples 1 to 7, the above-mentioned reasons are also strong acid ion exchange resin, weak acid ion exchange resin, strongly basic ion exchange resin (type I), strongly basic ion exchange resin ( ⁇ type) and chelate. In fibers, sufficient removal ability of nickel chelate complex and copper chelate complex could not be obtained.
- the above-mentioned processing operation was performed using 75% choline aqueous solution as a sample solution.
- Example 9 in which a 75% choline solution was used, the concentrations of nickel and copper in the stock solution were both 0.1 ppm, while the weakly basic ion exchange was carried out as in Examples 1 to 8 above. After treatment with resin and weak base ion exchange fiber, it was less than 0. Ol ppm, indicating that removal of nickel chelate complex and copper chelate complex is possible. Also, as in Examples 1 to 8, the above-mentioned reasons for the strong acid ion exchange resin, weak acid ion exchange resin, strong base ion exchange resin (type I), strongly basic ion exchange resin (type II) and chelates In fibers, sufficient removal ability of nickel chelate complexes and copper chelate complexes was not obtained.
- the above processing operation was performed using a slurry SS25 stock solution as a sample solution.
- Example 10 Semiconductor Polishing Slurry 1
- the concentrations of nickelenole and copper in the stock solution were both 0.1 ppm, while the weakly basic ion exchange resin was the same as in Examples 1 to 9 above. And, after treatment with weak base ion exchange fiber, it became less than or equal to 0. Ol ppm, indicating that removal of nickel chelate complex and copper chelate complex is possible. Further, as in the examples;! To 9, strongly acidic ion exchange resins, weak acidic ion exchange resins, strongly basic ion exchange resins (type I), strongly basic ion exchange resins ( ⁇ type), and xylose from the above reasons. In the case of rate fibers, sufficient removal ability of nickel chelate complex and copper chelate complex was not obtained.
- Example 11 Using 48% sodium hydroxide as the sample solution, load the flat membrane made of (I) and (I) woven into the holder for 45 mm membrane formation test as shown in Fig. 1, and use EDTA copper and nickel The results of addition and supply of the chiral complex are shown in Table 10.
- Example 11 A 48% sodium hydroxide was used as a sample solution, and a weakly basic anion exchange membrane (I) and a weakly basic anion exchange fiber (boiled) flat membrane were used as a holder 47 ⁇ for PTFE film formation test.
- Example 11 As shown in Table 10, removal of copper and nickel complexes was observed for both (I) and ( ⁇ ) flat membranes.
- the present invention can be widely used in the purification of a drug solution containing a compound having a chelating ability.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07859700A EP2100666A4 (en) | 2006-12-04 | 2007-11-30 | PROCESS FOR PURIFYING A CHEMICAL ADDITIONED WITH A CHELATING AGENT |
US12/517,313 US8278219B2 (en) | 2006-12-04 | 2007-11-30 | Method for purifying chemical added with chelating agent |
JP2008548263A JP5412115B2 (ja) | 2006-12-04 | 2007-11-30 | キレート剤添加薬液の精製方法 |
CN2007800449057A CN101547741B (zh) | 2006-12-04 | 2007-11-30 | 添加了螯合剂的药液的精制方法 |
KR1020097011788A KR101422876B1 (ko) | 2006-12-04 | 2007-11-30 | 킬레이트제 첨가 약액의 정제 방법 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006327624 | 2006-12-04 | ||
JP2006-327624 | 2006-12-04 |
Publications (1)
Publication Number | Publication Date |
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WO2008069136A1 true WO2008069136A1 (ja) | 2008-06-12 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2007/073192 WO2008069136A1 (ja) | 2006-12-04 | 2007-11-30 | キレート剤添加薬液の精製方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US8278219B2 (ja) |
EP (1) | EP2100666A4 (ja) |
JP (1) | JP5412115B2 (ja) |
KR (1) | KR101422876B1 (ja) |
CN (1) | CN101547741B (ja) |
TW (1) | TWI428435B (ja) |
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JP2011031223A (ja) * | 2009-08-05 | 2011-02-17 | Nomura Micro Sci Co Ltd | 陰イオン交換体、その前処理方法及び再生方法並びにアルカリ水溶液の精製方法及び精製装置 |
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WO2017069192A1 (ja) * | 2015-10-21 | 2017-04-27 | 和光純薬工業株式会社 | 安定化剤および安定化方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58216775A (ja) * | 1982-05-28 | 1983-12-16 | Kurita Water Ind Ltd | 重金属およびキレ−ト剤を含む水のイオン交換方法 |
JPS6197096A (ja) * | 1984-10-19 | 1986-05-15 | Hitachi Ltd | 濾過脱塩装置 |
JPS63272460A (ja) | 1987-04-28 | 1988-11-09 | Mitsubishi Monsanto Chem Co | ウエハ−用研磨剤組成物 |
JP2001096272A (ja) * | 1999-09-28 | 2001-04-10 | Japan Organo Co Ltd | 水の製造方法 |
JP2005045102A (ja) * | 2003-07-24 | 2005-02-17 | Shin Etsu Handotai Co Ltd | ウエーハの研磨方法 |
JP2005103700A (ja) | 2003-09-30 | 2005-04-21 | Komatsu Electronic Metals Co Ltd | キレート剤添加装置、キレート剤添加方法、ウェーハ研磨システム及びウェーハ研磨方法 |
JP2006086144A (ja) * | 2004-09-14 | 2006-03-30 | Nippon Chem Ind Co Ltd | 半導体ウェーハの研磨装置及びこれを用いた研磨方法 |
Family Cites Families (3)
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---|---|---|---|---|
JP4222582B2 (ja) * | 1999-03-04 | 2009-02-12 | 日本化学工業株式会社 | 高純度シリカゾルの製造方法 |
JP4643085B2 (ja) * | 2001-09-19 | 2011-03-02 | 日本化学工業株式会社 | 研磨剤用高純度コロイダルシリカの製造方法 |
JP4852302B2 (ja) * | 2004-12-01 | 2012-01-11 | 信越半導体株式会社 | 研磨剤の製造方法及びそれにより製造された研磨剤並びにシリコンウエーハの製造方法 |
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2007
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- 2007-11-30 JP JP2008548263A patent/JP5412115B2/ja active Active
- 2007-11-30 KR KR1020097011788A patent/KR101422876B1/ko active IP Right Grant
- 2007-11-30 US US12/517,313 patent/US8278219B2/en active Active
- 2007-11-30 CN CN2007800449057A patent/CN101547741B/zh active Active
- 2007-11-30 EP EP07859700A patent/EP2100666A4/en not_active Withdrawn
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Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58216775A (ja) * | 1982-05-28 | 1983-12-16 | Kurita Water Ind Ltd | 重金属およびキレ−ト剤を含む水のイオン交換方法 |
JPS6197096A (ja) * | 1984-10-19 | 1986-05-15 | Hitachi Ltd | 濾過脱塩装置 |
JPS63272460A (ja) | 1987-04-28 | 1988-11-09 | Mitsubishi Monsanto Chem Co | ウエハ−用研磨剤組成物 |
JP2001096272A (ja) * | 1999-09-28 | 2001-04-10 | Japan Organo Co Ltd | 水の製造方法 |
JP2005045102A (ja) * | 2003-07-24 | 2005-02-17 | Shin Etsu Handotai Co Ltd | ウエーハの研磨方法 |
JP2005103700A (ja) | 2003-09-30 | 2005-04-21 | Komatsu Electronic Metals Co Ltd | キレート剤添加装置、キレート剤添加方法、ウェーハ研磨システム及びウェーハ研磨方法 |
JP2006086144A (ja) * | 2004-09-14 | 2006-03-30 | Nippon Chem Ind Co Ltd | 半導体ウェーハの研磨装置及びこれを用いた研磨方法 |
Non-Patent Citations (2)
Title |
---|
MIYAHARA S.: "Zoho Jitsuyo Ion Kokan", KABUSHIKI KAISHA KAGAKU KOGYOSHA, 30 August 1984 (1984-08-30), pages 3, 12 - 19, 179 - 182 * |
See also references of EP2100666A4 * |
Cited By (1)
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JP2011031223A (ja) * | 2009-08-05 | 2011-02-17 | Nomura Micro Sci Co Ltd | 陰イオン交換体、その前処理方法及び再生方法並びにアルカリ水溶液の精製方法及び精製装置 |
Also Published As
Publication number | Publication date |
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CN101547741A (zh) | 2009-09-30 |
KR101422876B1 (ko) | 2014-07-23 |
CN101547741B (zh) | 2012-02-01 |
EP2100666A4 (en) | 2013-03-27 |
TW200833827A (en) | 2008-08-16 |
TWI428435B (zh) | 2014-03-01 |
US8278219B2 (en) | 2012-10-02 |
EP2100666A1 (en) | 2009-09-16 |
JPWO2008069136A1 (ja) | 2010-03-18 |
US20100078589A1 (en) | 2010-04-01 |
KR20090087046A (ko) | 2009-08-14 |
JP5412115B2 (ja) | 2014-02-12 |
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