WO2014188898A1 - 電解処理方法及び電解処理装置 - Google Patents
電解処理方法及び電解処理装置 Download PDFInfo
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- WO2014188898A1 WO2014188898A1 PCT/JP2014/062585 JP2014062585W WO2014188898A1 WO 2014188898 A1 WO2014188898 A1 WO 2014188898A1 JP 2014062585 W JP2014062585 W JP 2014062585W WO 2014188898 A1 WO2014188898 A1 WO 2014188898A1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B7/00—Electrophoretic production of compounds or non-metals
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/30—Cells comprising movable electrodes, e.g. rotary electrodes; Assemblies of constructional parts thereof
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
- C25D17/10—Electrodes, e.g. composition, counter electrode
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
Definitions
- the present invention relates to an electrolytic treatment method for performing a predetermined treatment using ions to be treated contained in a treatment liquid, and an electrolytic treatment apparatus for performing the electric field treatment method.
- Electrolytic process is a technique used for various treatments such as plating treatment and etching treatment.
- Such plating treatment is performed by, for example, a plating apparatus described in Patent Document 1.
- the plating apparatus has a plating tank for storing a plating solution, and the inside of the plating tank is partitioned by a regulation plate.
- An anode is arranged in one of the divided compartments, and an object to be processed (substrate) is immersed in the other compartment, and the potential distribution between the anode and the object to be processed is adjusted by the regulation plate.
- a voltage is applied with the anode as the anode and the object as the cathode, and a current flows between the anode and the object. With this current, the metal ions in the plating solution are moved to the object to be processed, and further, the metal ions are deposited as the plating metal on the object to be processed, so that the plating process is performed.
- the electric field is increased in the plating process described in Patent Document 1, or the plating solution is stirred and circulated as described in Patent Document 2.
- the electric field is increased as in the former, water electrolysis may also proceed.
- voids are generated in the plated metal deposited on the object to be processed due to hydrogen bubbles generated by electrolysis of water.
- a large stirring mechanism is required. In some cases, such a stirring mechanism cannot be provided due to the apparatus configuration.
- the plating process is performed in a state where sufficient metal ions are not accumulated as described above, that is, when the metal ions that have reached the object to be processed are sequentially deposited, the plating metal is not uniform on the object to be processed. In this case, the plating process is not performed uniformly. In addition, since the crystals in the plated metal do not become dense, there is room for improvement in quality.
- the present invention has been made in view of such a point, and an object of the present invention is to efficiently and appropriately perform a predetermined process on an object to be processed using ions to be processed in a processing solution.
- the present invention is an electrolytic treatment method for performing a predetermined treatment using ions to be treated contained in a treatment solution, and an electrode and a counter electrode are respectively disposed so as to sandwich the treatment solution. And an electrode placement step of placing an indirect electrode for forming an electric field in the treatment liquid, and a treatment object for moving a treatment ion in the treatment liquid to the counter electrode side by applying a voltage to the indirect electrode. An ion transfer step, and a treatment ion oxidation-reduction step of oxidizing or reducing the treatment ions moved to the opposite electrode side by applying a voltage between the direct electrode and the opposite electrode.
- the ion to be processed is a positive ion
- a voltage is applied with the direct electrode as the anode and the counter electrode as the cathode, and a current flows between the direct electrode and the counter electrode. If it does so, the charge of the to-be-processed ion which moved to the counter electrode side will be exchanged, and to-be-processed ion will be reduce
- the ion to be processed is an anion
- a voltage is applied to the indirect electrode to form an electric field
- the ion to be processed moves to the counter electrode side.
- a voltage is applied using the direct electrode as a cathode and the counter electrode as an anode, and a current flows between the direct electrode and the counter electrode. If it does so, the electric charge of the to-be-processed ion which moved to the counter electrode side will be exchanged, and an to-be-processed ion will be oxidized.
- the movement of the ions to be processed by the indirect electrode and the oxidation or reduction of the ions to be processed by the direct electrode and the counter electrode are performed separately.
- the ions to be processed are moved by the electrodes, charge exchange of the ions to be processed is not performed.
- the electric field at the time of applying a voltage to an indirect electrode can be made high, suppressing the electrolysis of water like the past. This high electric field speeds up the movement of ions to be processed and improves the rate of electrolytic treatment.
- the ions to be processed can be oxidized / reduced in a state where sufficient ions to be processed are accumulated on the counter electrode side, it is not necessary to pass a large amount of current between the anode and the object to be processed as in the prior art. Treated ions can be efficiently oxidized and reduced.
- charge exchange that is, electrolytic treatment is performed after ions to be processed are arranged substantially uniformly on the surface of the counter electrode, a uniform and high quality film quality can be realized.
- Another aspect of the present invention is an electrolytic treatment apparatus that performs a predetermined treatment using ions to be treated contained in a treatment liquid, and includes a direct electrode and a counter electrode that are arranged so as to sandwich the treatment liquid, Furthermore, it has an indirect electrode for forming an electric field in the processing liquid, and the indirect electrode moves a target ion in the processing liquid to the counter electrode side by applying a voltage, and the direct electrode When the voltage is applied between the counter electrode, the ions to be processed that have moved to the counter electrode side are oxidized or reduced.
- FIG. 1 is a longitudinal sectional view showing an outline of a configuration of a plating apparatus 1 as an electrolytic processing apparatus according to the present embodiment.
- the dimensions of each component do not necessarily correspond to the actual dimensions in order to prioritize easy understanding of the technology.
- the plating apparatus 1 has a plating tank 10 that stores therein a plating solution M as a processing solution.
- a plating solution M for example, a mixed solution in which copper sulfate and sulfuric acid are dissolved is used.
- the plating solution M contains copper ions as ions to be processed.
- a direct electrode 20, an indirect electrode 21, and a counter electrode 22 are disposed so as to be immersed in the plating solution M.
- the indirect electrode 21 is provided with an insulating material 23 so as to cover the indirect electrode 21.
- the direct electrode 20 and the indirect electrode 21 have the same shape, and are arranged on the front and back sides through an insulating material 23.
- the term “front and back integration” as used herein means that, for example, the front surface of the direct electrode 20 and the back surface of the indirect electrode 21 are in contact with each other via an insulating material 23, and the direct electrode 20 and the indirect electrode 21 have an integrated structure. .
- the counter electrode 22 is provided in common to the direct electrode 20 and the indirect electrode 21.
- the counter electrode 22 is disposed so as to face the direct electrode 20 and the indirect electrode 21 with the plating solution M interposed therebetween.
- the counter electrode 22 is a workpiece to be plated.
- a direct current power source 30 is connected to the direct electrode 20, the indirect electrode 21, and the counter electrode 22.
- the direct electrode 20 and the indirect electrode 21 are each connected to the positive electrode side of the DC power supply 30.
- the counter electrode 22 is connected to the negative electrode side of the DC power supply 30.
- a switch 31 for switching the connection state between the direct electrode 20 and the DC power supply 30 is provided between the direct electrode 20 and the DC power supply 30. On / off of the switch 31 is controlled by the control unit 40. When the switch 31 is on, the direct electrode 20 and the DC power supply 30 are connected, and a current flows between the direct electrode 20 and the counter electrode 22. When the switch 31 is off, the direct electrode 20 and the DC power source 30 are disconnected, and no current flows between the direct electrode 20 and the counter electrode 22.
- a so-called pulse voltage in which a direct current voltage is continuously applied between the indirect electrode 21 and the counter electrode 22 while a direct voltage is applied in a pulse form between the direct electrode 20 and the counter electrode 22.
- a DC voltage is applied with the indirect electrode 21 as an anode and the counter electrode 22 as a cathode to form an electric field (electrostatic field). Then, sulfate ions S that are negatively charged particles gather on the indirect electrode 21 and direct electrode 20 sides, and copper ions C that are positively charged particles move to the counter electrode 22 side.
- the electrode 31 is directly in an electrically floating state by keeping the switch 31 in an OFF state.
- charge exchange is not performed on any of the surfaces of the direct electrode 20, the indirect electrode 21, and the counter electrode 22, charged particles attracted by the electrostatic field are arranged on the electrode surface.
- the copper ions C are also arranged substantially uniformly on the surface of the counter electrode 22 that is the object to be processed. Since the charge exchange of the copper ions C is not performed on the surface of the counter electrode 22 and the electrolysis of water is suppressed, the electric field at the time of applying a voltage between the indirect electrode 21 and the counter electrode 22 can be increased. And the movement of the copper ion C can be accelerated by this high electric field. Furthermore, by arbitrarily controlling this electric field, the copper ions C arranged on the surface of the counter electrode 22 are also arbitrarily controlled.
- the direct electrode 20 in order to avoid the direct electrode 20 from becoming a cathode, the direct electrode 20 is not connected to the ground but is in an electrically floating state.
- the switch 31 is turned on as shown in FIG. A voltage is applied using the direct electrode 20 as an anode and the counter electrode 22 as a cathode, and a current flows between the direct electrode 20 and the counter electrode 22. Then, charge exchange with the copper ions C arranged substantially uniformly on the surface of the counter electrode 22 is performed, the copper ions C are reduced, and the copper plating 50 is deposited on the surface of the counter electrode 22. At this time, the sulfate ions S are directly oxidized by the electrode 20.
- the switch 31 is turned off again, a voltage is applied between the indirect electrode 21 and the counter electrode 22, and the copper ions C are moved and accumulated on the counter electrode 22 side.
- the switch 31 is turned on to reduce the copper ions C.
- the movement and accumulation of the copper ions C and the reduction of the copper ions C are repeatedly performed, so that the copper plating 50 grows to a predetermined film thickness as shown in FIG.
- a series of plating processes in the plating apparatus 1 is completed.
- the copper ions C are moved to the counter electrode 22 side, and the copper ions C are sufficiently collected on the counter electrode 22 side.
- the copper ion C can be reduced on the counter electrode 22 side by applying a voltage directly between the electrode 20 and the counter electrode 22.
- the movement of the copper ion C and the reduction of the copper ion C are individually performed by the voltage between the different electrodes, and thus the plating process can be efficiently performed in a short time.
- the copper ions C can always be moved to the counter electrode 22 side. Further, the direct electrode 20 and the counter electrode 22 By applying a DC voltage in the form of pulses in the meantime, these copper ions C can be reduced in a state where sufficient copper ions C have moved and accumulated on the counter electrode 22 side. For this reason, it is not necessary to flow a wasteful current directly between the electrode and the counter electrode as in the prior art, and the copper ions C can be reduced efficiently.
- the plating process can be performed uniformly.
- the copper ion C is arrange
- the electrolytic reaction can be subdivided, and a dense electrolytic plating that allows a dense electrolytic reaction can be deposited. Therefore, the quality of the to-be-processed object after a plating process can be improved.
- the direct electrode 20 and the indirect electrode 21 are disposed so as to be integrated with each other, when the copper ion C is moved to the counter electrode 22 side by the indirect electrode 21, sulfate ions S gather on the indirect electrode 21 and the direct electrode 20 side. easy. Moreover, since the sulfate ions S are collected directly on the electrode 20, when the copper ions C are reduced by the direct electrode 20 and the counter electrode 22, the oxidation reaction of the sulfate ions S on the direct electrode 20 is promoted. Therefore, the copper ion C can be reduced more efficiently.
- various patterns can be considered as the arrangement method when the direct electrode 20 and the indirect electrode 21 are arranged on the front and back sides.
- the indirect electrode 21 and the insulating material 23 may be arranged so that the electrode 20 completely covers the indirect electrode 21 and the insulating material 23. If arranged in this way, sulfate ions S can be collected directly on the surface of the electrode 20 more efficiently.
- the direct electrode 20 and the indirect electrode 21 are integrally arranged on the front and back sides, but may be arranged so as to face each other as shown in FIG. Even in such a case, the copper ion C can be moved to the counter electrode 22 side by the indirect electrode 21, and the copper ion C can be reduced by the direct electrode 20. Therefore, the same effect as that of the above embodiment can be enjoyed.
- the indirect electrode 21 is provided inside the plating tank 10, but the indirect electrode 21 may be provided outside the plating tank 10.
- the counter electrode 22 is used as an electrode common to the direct electrode 20 and the indirect electrode 21, but the indirect electrode 21 does not need to be used as a pair with the counter electrode 22. That is, the indirect electrode 21 may be used alone as a capacitor, and an electric field may be formed by applying a voltage to the indirect electrode 21. By this electric field, the sulfate ions S move to the indirect electrode 21 and the direct electrode 20 side, and the copper ions C move to the counter electrode 22 side.
- the direct electrode 20 needs to be used in a pair with the counter electrode 22 because a current flows between the direct electrode 20 and the counter electrode 22 to reduce the copper ions C accumulated on the counter electrode 22 side.
- the power source of the indirect electrode 21 may be a power source different from the DC power source 30, that is, the DC power source 30 may not be a common power source for the direct electrode 20 and the indirect electrode 21.
- the power sources of the direct electrode 20 and the indirect electrode 21 can be arbitrarily set.
- the present invention can be applied to various electrolytic processes such as an etching process.
- the present invention can also be applied to the case where the ions to be processed are oxidized on the counter electrode 22 side.
- the ion to be treated is an anion
- the same electrolytic treatment may be performed with the anode and the cathode reversed in the above embodiment. That is, a voltage is applied to the indirect electrode 21 to form an electric field, and ions to be processed are moved to the counter electrode 22 side. A voltage is applied using the direct electrode 20 as a cathode and the counter electrode 22 as an anode, and a current flows between the direct electrode 20 and the counter electrode 22. Then, the charges of the ions to be processed that have moved to the counter electrode 22 side are exchanged, and the ions to be processed are oxidized.
- the arrangement and electrode structure of the direct electrode 20, the indirect electrode 21, and the counter electrode 22 can be arbitrarily set.
- the indirect electrode 21 is provided directly on the electrode 20 side, but may be provided on the counter electrode 22 side as shown in FIG.
- the indirect electrode 21 is provided on the outer surface of the plating tank 10, and the counter electrode 22 is provided on the inner surface of the plating tank 10. That is, the indirect electrode 21 and the counter electrode 22 are arranged to face each other with the plating tank 10 interposed therebetween. And the plating tank 10 is comprised so that it may be in an electrically floating state.
- the insulating material 23 provided around the indirect electrode 21 may be omitted.
- the indirect electrode 21 is provided on the outer surface of the plating tank 10, but is provided inside the plating tank 10, and the plating solution M is provided between the indirect electrode 21 and the counter electrode 22. May be interposed.
- the direct electrode 20 is connected to the positive electrode side of the DC power supply 30, and the indirect electrode 21 and the counter electrode 22 are connected to the negative electrode side of the DC power supply 30, respectively.
- the switch 31 provided between the direct electrode 20 and the DC power supply 30 in the above embodiment is provided between the counter electrode 22 and the DC power supply 30.
- a DC voltage is applied between the direct electrode 20 and the counter electrode 22 in a pulsed manner while a DC voltage is continuously applied between the direct electrode 20 and the indirect electrode 21. That is, first, by applying a DC voltage with the direct electrode 20 as an anode and the indirect electrode 21 as a cathode, the sulfate ions S are moved to the direct electrode 20 side, and at the same time the copper electrode is placed on the indirect electrode 21 side, ie, the counter electrode 22 side. Ions C are moved.
- the copper ions C on the surface of the counter electrode 22 are reduced by applying a voltage with the electrode 20 as the anode and the counter electrode 22 as the cathode.
- the copper plating 50 is deposited on the surface of the counter electrode 22. Then, the movement and accumulation of the copper ions C and the reduction of the copper ions C are repeatedly performed, and a series of plating processes are performed on the surface of the counter electrode 22.
- the electrode structure of the direct electrode 20, the indirect electrode 21, and the counter electrode 22 can take various shapes, and when the indirect electrode 21 is provided outside the plating tank 10 as shown in FIG.
- the indirect electrode 21 can be freely designed according to the shape of the plating tank 10.
- an etching processing apparatus 60 as an electrolytic processing apparatus has an etching solution tank 70 that stores therein an etching solution E as a processing solution.
- an etching solution E for example, a mixed solution of hydrofluoric acid and isopropyl alcohol (HF / IPA), a mixed solution of hydrofluoric acid and ethanol, or the like is used.
- the direct electrode 20 is connected to the negative electrode side of the DC power supply 30, and the indirect electrode 21 and the counter electrode 22 are connected to the positive electrode side of the DC power supply 30, respectively. Since the other configuration of the etching processing apparatus 60 is the same as the configuration of the plating processing apparatus 1, description thereof is omitted.
- the positive charged particles H are moved to the direct electrode 20 side, and the indirect electrode 21 side, that is, the counter electrode.
- the to-be-processed ion N which is an anion in the etching liquid E is moved to 22 side.
- the ions to be processed on the surface of the counter electrode 22 are applied by directly applying a voltage using the electrode 20 as a cathode and the counter electrode 22 as an anode. Oxidized and the surface of the counter electrode 22 is etched. Then, the movement and accumulation of the ions to be processed N and the oxidation of the ions to be processed N are repeatedly performed, and a series of etching processes are performed on the surface of the counter electrode 22.
- a plurality of counter electrodes 22 may be provided as shown in FIG.
- the plurality of counter electrodes 22 are arranged in parallel on the negative electrode side of the DC power supply 30.
- the plating apparatus 1 in FIG. 11 shows an example in which a plurality of counter electrodes 22 are provided in the plating apparatus 1 in FIG. In the example of FIG. 11, two counter electrodes 22 are provided, but the number of counter electrodes 22 can be arbitrarily set.
- Such batch processing for the plurality of counter electrodes 22 can be applied to both oxidation and reduction of ions to be processed.
- electrolytic treatment may be performed with the arrangement of the positive and negative electrodes of the DC power supply 30 reversed and the anode and cathode reversed.
- the counter electrode 22 is plated using the plating solution M stored in the plating tank 10, but the plating solution M is formed on the counter electrode 22 as shown in FIG. 12. May be supplied for plating.
- the plating solution M is supplied to the upper surface of the substantially flat counter electrode 22.
- the plating solution M stays on the counter electrode 22 due to surface tension, for example.
- An electrode 20 is further arranged directly on the plating solution M.
- An indirect electrode 21 is disposed on the lower surface of the counter electrode 22.
- the direct electrode 20 is connected to the positive electrode side of the DC power supply 30, and the indirect electrode 21 and the counter electrode 22 are connected to the negative electrode side of the DC power supply 30, respectively.
- the switch 31 is provided between the counter electrode 22 and the DC power supply 30.
- the copper ion C can be moved to the counter electrode 22 side by the indirect electrode 21 as in the above embodiment, and the copper ion C can be reduced by the direct electrode 20. Therefore, the same effect as that of the above embodiment can be enjoyed.
- the indirect electrode 21 was provided in the lower surface of the counter electrode 22 in FIG. 12, you may provide in the upper surface of the electrode 20 directly, as shown in FIG. In such a case, the direct electrode 20 and the indirect electrode 21 are each connected to the positive electrode side of the DC power source 30, and the counter electrode 22 is connected to the negative electrode side of the DC power source 30.
- the switch 31 is provided between the direct electrode 20 and the DC power supply 30. Then, the copper ion C is moved to the counter electrode 22 side by the indirect electrode 21, and the copper ion C is reduced by the direct electrode 20.
- both oxidation and reduction of the ions to be processed can be performed.
- electrolytic treatment may be performed with the arrangement of the positive and negative electrodes of the DC power supply 30 reversed and the anode and cathode reversed.
Abstract
Description
本願は、2013年5月20日に日本国に出願された特願2013-106072号、及び2014年1月8日に日本国に出願された特願2014-001465号に基づき、優先権を主張し、その内容をここに援用する。
10 めっき槽
20 直接電極
21 間接電極
22 対向電極
23 絶縁材
30 直流電源
31 スイッチ
40 制御部
50 銅めっき
60 エッチング処理装置
70 エッチング液槽
C 銅イオン
E エッチング液
H 荷電粒子
M めっき液
N 被処理イオン
S 硫酸イオン
Claims (26)
- 処理液に含まれる被処理イオンを用いて所定の処理を行う電解処理方法であって、
前記処理液を挟むように直接電極と対向電極をそれぞれ配置すると共に、当該処理液に電界を形成する間接電極を配置する電極配置工程と、
前記間接電極に電圧を印加することで、前記処理液中の被処理イオンを前記対向電極側に移動させる被処理イオン移動工程と、
前記直接電極と前記対向電極との間に電圧を印加することで、前記対向電極側に移動した前記被処理イオンを酸化又は還元する被処理イオン酸化還元工程と、を有する。 - 請求項1に記載の電解処理方法であって、
前記電極配置工程において、前記直接電極と前記間接電極をそれぞれ対向して配置する。 - 請求項1に記載の電解処理方法であって、
前記電極配置工程において、前記直接電極と前記間接電極を表裏一体に配置する。 - 請求項3に記載の電解処理方法であって、
前記電極配置工程において、前記直接電極の表面と前記間接電極の裏面が当接するように、前記直接電極と前記間接電極を一体に配置する。 - 請求項3に記載の電解処理方法であって、
前記電極配置工程において、前記直接電極が前記間接電極の全体を覆うように、前記直接電極と前記間接電極を一体に配置する。 - 請求項1に記載の電解処理方法であって、
前記電極配置工程において、前記間接電極と前記対向電極をそれぞれ対向して配置する。 - 請求項1に記載の電解処理方法であって、
前記電極配置工程において、複数の前記対向電極を配置する。 - 請求項1に記載の電解処理方法であって、
前記電極配置工程において、前記直接電極、前記間接電極及び前記対向電極をそれぞれ前記処理液中に浸漬して配置する。 - 請求項1に記載の電解処理方法であって、
前記電極配置工程において、前記対向電極の上面に前記処理液を供給し、さらに当該処理液上に前記直接電極を配置する。 - 請求項9に記載の電解処理方法であって、
前記電極配置工程において、前記対向電極の下面側又は前記直接電極の上面側に前記間接電極を配置する。 - 請求項1に記載の電解処理方法であって、
前記直接電極は、電気的にフローティング状態に維持されている。 - 請求項1に記載の電解処理方法であって、
前記被処理イオン移動工程において、前記間接電極に印加される電圧は連続的に印加される直流電圧であって、
前記被処理イオン酸化還元工程において、前記直接電極と前記対向電極との間に印加される電圧はパルス電圧である。 - 請求項1に記載の電解処理方法であって、
前記電極配置工程において、前記対向電極は前記直接電極と前記間接電極に共通して配置され、
前記被処理イオン移動工程において、前記間接電極と前記対向電極との間に電圧を印加し、前記被処理イオンを前記対向電極側に移動させる。 - 処理液に含まれる被処理イオンを用いて所定の処理を行う電解処理装置であって、
前記処理液を挟むように配置された直接電極と対向電極を有し、さらに前記処理液に電界を形成する間接電極を有し、
前記間接電極は、電圧が印可されることで、前記処理液中の被処理イオンを対向電極側に移動させ、
前記直接電極は、前記対向電極との間で電圧が印加されることで、前記対向電極側に移動した前記被処理イオンを酸化又は還元する。 - 請求項14に記載の電解処理装置であって、
前記直接電極と前記間接電極は、それぞれ対向して配置されている。 - 請求項14に記載の電解処理装置であって、
前記直接電極と前記間接電極は、表裏一体に配置されている。 - 請求項16に記載の電解処理装置であって、
前記直接電極の表面と前記間接電極の裏面が当接するように、前記直接電極と前記間接電極は一体に配置されている。 - 請求項16に記載の電解処理装置であって、
前記直接電極が前記間接電極の全体を覆うように、前記直接電極と前記間接電極は一体に配置されている。 - 請求項14に記載の電解処理装置であって、
前記間接電極と前記対向電極は、それぞれ対向して配置されている。 - 請求項14に記載の電解処理装置であって、
前記対向電極は、複数配置されている。 - 請求項14に記載の電解処理装置であって、
前記直接電極、前記間接電極及び前記対向電極は、それぞれ前記処理液中に浸漬して配置されている。 - 請求項14に記載の電解処理装置であって、
前記対向電極の上面に前記処理液が供給され、さらに当該処理液上に前記直接電極が配置されている。 - 請求項22に記載の電解処理装置であって、
前記間接電極は、前記対向電極の下面側又は前記直接電極の上面側に配置されている。 - 請求項14に記載の電解処理装置であって、
前記直接電極は、電気的にフローティング状態に維持されている。 - 請求項14に記載の電解処理装置であって、
前記間接電極に印加される電圧は連続的に印加される直流電圧であって、
前記直接電極と前記対向電極との間に印加される電圧はパルス電圧である。 - 請求項14に記載の電解処理装置であって、
前記対向電極は前記直接電極と前記間接電極に共通して設けられ、
前記間接電極は、前記対向電極との間で電圧が印可されることで、前記被処理イオンを前記対向電極側に移動させる。
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WO2018068094A1 (en) * | 2016-10-12 | 2018-04-19 | Newsouth Innovations Pty Limited | Method and apparatus for controlling an electrochemical process |
JP6789321B2 (ja) * | 2017-02-01 | 2020-11-25 | 東京エレクトロン株式会社 | 電解処理装置および電解処理方法 |
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