WO2009133836A1 - 水反応性Al膜の製造方法及び成膜室用構成部材 - Google Patents
水反応性Al膜の製造方法及び成膜室用構成部材 Download PDFInfo
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- WO2009133836A1 WO2009133836A1 PCT/JP2009/058255 JP2009058255W WO2009133836A1 WO 2009133836 A1 WO2009133836 A1 WO 2009133836A1 JP 2009058255 W JP2009058255 W JP 2009058255W WO 2009133836 A1 WO2009133836 A1 WO 2009133836A1
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- film
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000008021 deposition Effects 0.000 title claims abstract description 25
- 239000000470 constituent Substances 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000000463 material Substances 0.000 claims abstract description 56
- 239000000758 substrate Substances 0.000 claims abstract description 41
- 238000010285 flame spraying Methods 0.000 claims abstract description 18
- 239000000203 mixture Substances 0.000 claims abstract description 18
- 239000013078 crystal Substances 0.000 claims abstract description 17
- 239000012768 molten material Substances 0.000 claims abstract description 6
- 229910052738 indium Inorganic materials 0.000 claims description 55
- 239000012535 impurity Substances 0.000 claims description 50
- 238000005507 spraying Methods 0.000 abstract description 29
- 229910052782 aluminium Inorganic materials 0.000 abstract description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 9
- 238000001816 cooling Methods 0.000 abstract description 9
- 230000008018 melting Effects 0.000 abstract description 5
- 238000002844 melting Methods 0.000 abstract description 5
- 239000010408 film Substances 0.000 description 280
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 58
- 238000010438 heat treatment Methods 0.000 description 53
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- 229910052710 silicon Inorganic materials 0.000 description 38
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- 238000000151 deposition Methods 0.000 description 22
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- 229910052797 bismuth Inorganic materials 0.000 description 17
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- 239000002585 base Substances 0.000 description 14
- 238000007654 immersion Methods 0.000 description 14
- 229910052751 metal Inorganic materials 0.000 description 14
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- 229910018117 Al-In Inorganic materials 0.000 description 12
- 229910018456 Al—In Inorganic materials 0.000 description 12
- 238000012545 processing Methods 0.000 description 12
- 230000009257 reactivity Effects 0.000 description 12
- 238000007664 blowing Methods 0.000 description 11
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
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- 150000002739 metals Chemical class 0.000 description 6
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- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 229910002706 AlOOH Inorganic materials 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 238000007733 ion plating Methods 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 238000001771 vacuum deposition Methods 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
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- 229910052742 iron Inorganic materials 0.000 description 1
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- 238000000691 measurement method Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/56—Apparatus specially adapted for continuous coating; Arrangements for maintaining the vacuum, e.g. vacuum locks
- C23C14/564—Means for minimising impurities in the coating chamber such as dust, moisture, residual gases
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/4401—Means for minimising impurities, e.g. dust, moisture or residual gas, in the reaction chamber
- C23C16/4404—Coatings or surface treatment on the inside of the reaction chamber or on parts thereof
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/18—After-treatment
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/18—After-treatment
- C23C4/185—Separation of the coating from the substrate
Definitions
- the present invention relates to a method for producing a water-reactive Al film and a component for a film forming chamber, and more particularly to a method for producing a water-reactive Al film by flame spraying and a component for a film forming chamber covered with this Al film.
- a film forming material is provided during the film forming process in the film forming chamber constituent member provided in the apparatus.
- the film forming chamber component for example, a deposition plate for preventing the film from adhering to the inside of the vacuum vessel other than the substrate, a shutter, or a film used only for a predetermined place on the substrate.
- a mask, a tray for transporting a substrate, and the like can be given.
- a film having the same composition as the target thin film (thin film to be formed on the substrate) adheres to these members. These members are usually used repeatedly after removing the adhered film.
- the film that inevitably adheres to these film forming chamber components becomes thicker according to the working time of the film forming process.
- Such an adhesion film peels off as particles from the film forming chamber component due to the internal stress or stress due to repeated thermal history, adheres to the substrate, and causes film defects. Therefore, the film forming chamber component is removed from the film forming apparatus at a stage where the attached film does not peel off, washed to remove the attached film, and then surface-finished and reused. It is done regularly.
- the deposit on the film is peeled off. It is currently being reused.
- a sandblasting method, a wet etching method using acid or alkali, a peeling method using hydrogen embrittlement such as hydrogen peroxide, and a peeling method using electrolysis are generally performed. It has been broken. In this case, when the deposit is peeled off, the deposition preventing plate is not a little dissolved and damaged, so the number of reuses is limited. Therefore, it is desired to develop a film peeling method that minimizes damage to the deposition preventing plate.
- the concentration of the peeled film in the waste liquid generated in the chemical treatment such as acid or alkali treatment is low, the recovery cost of valuable metals becomes high and it is not profitable. In such a case, the present situation is that it is treated as waste.
- An object of the present invention is to solve the above-mentioned problems of the prior art, a method for producing an Al film capable of reacting and dissolving in an atmosphere containing moisture, and a film formation chamber covered with the Al film. It is in providing the structural member.
- a material obtained by adding 2 to 5 wt% In to 4NAl or 5NAl on an Al basis is melted so that the composition becomes uniform, and this molten material is flame sprayed. It is characterized in that an Al film in which In is uniformly dispersed in an Al crystal grain is formed by thermal spraying on a substrate surface by a method and rapid solidification.
- the reactivity with water decreases, and if it exceeds 5 wt%, the reactivity with water becomes very high, and may react with moisture in the atmosphere.
- the Al sprayed film thus obtained exists in a state in which In crystal grains are uniformly and highly dispersed in Al crystal grains, it easily reacts in an atmosphere containing moisture to generate and dissolve hydrogen. .
- the method for producing a water-reactive Al film of the present invention is also based on 4NAl or 5NAl, taking into account 2-5 wt% In and the amount of impurity Si in Al, and 0% in total with the amount of impurity Si. 0.04 to 0.6 wt%, preferably 0.04 to 0.2 wt% of Si-added material was melted so that the composition was uniform, and this molten material was then applied to the substrate surface by flame spraying. By spraying and rapidly solidifying, an Al film in which In is uniformly dispersed in Al crystal grains is formed.
- the constituent member for the film forming chamber of the film forming apparatus of the present invention is characterized in that the water-reactive Al film is provided on the surface.
- the above-mentioned constituent member is a deposition plate, a shutter or a mask.
- the Al sprayed film obtained by the flame spraying method of the present invention can be easily manufactured at a low cost by a simple process.
- a thermal history from a film forming process of about 300 to 350 ° C. there is an effect that it has a property of reacting and dissolving in an atmosphere in which moisture exists.
- this Al sprayed film reacts in the presence of moisture and dissolves efficiently while generating hydrogen, the constituent members for the film forming chamber covered with this water reactive Al film (for example, a deposition plate, a shutter) If a film is formed using a film forming apparatus equipped with a mask and the like, an inevitable attached film made of a film forming material that adheres to the surface of an adhesion preventing plate or the like during the film forming process is reacted with the reaction of this Al sprayed film. ⁇ Effects separation and separation from the film forming chamber components by dissolution, and can easily recover valuable metals as film forming materials from the peeled adhered film, and increase the number of reuse of the components. Play.
- the film forming chamber undergoes a repeated thermal history.
- the surface of the constituent member provided in the deposition chamber such as an adhesion-preventing plate coated with the Al film of the present invention also undergoes a repeated thermal history. Therefore, the Al film at the time of thermal spray deposition before receiving the thermal history is stable and easy to handle, and the Al thermal spray film with the unavoidable deposited film after passing through the thermal history in the deposition process is composed of the constituent members. It is necessary to have solubility (activity) that can be easily peeled off from the substrate together with the attached film, and be stable.
- the water-reactive Al film obtained according to the present invention sufficiently satisfies such solubility.
- the upper limit temperature of the thermal history in the film forming chamber is, for example, about 300 to 350 ° C. in the case of film formation by sputtering, vacuum deposition, ion plating, CVD, etc. It is practically sufficient if the Al film that has undergone the thermal history has water reactivity, and it is even better if the Al film that has undergone the thermal history up to 350 ° C. has water reactivity. As will be described below, the water-reactive Al film in the present invention sufficiently satisfies such solubility.
- the dissolution current Evaluation is performed by density (mA / cm 2 ).
- This measurement method is a method of measuring the mass decrease before and after immersion of the sample in the treatment liquid and converting it to the value of current density from the surface area, immersion treatment time, and the like. If the dissolution current density measured by this method is 50 mA / cm 2 or more, the Al film with the unavoidable adhered film after the thermal history in the film forming process can be easily peeled from the substrate together with the adhered film. It can be said that it has solubility (activity).
- Al used in the present invention has a purity of 4N (99.99%) and 5N (99.999%).
- 2N (99%) Al and 3N (99.9%) Al obtained by electrolysis are further added to the solid phase during solidification by three-layer electrolysis or partial solidification (segregation). It can be obtained by a method using a temperature difference from the liquid phase.
- the main impurities in 4NAl and 5NAl are Fe and Si, and Cu, Ni, C, etc. are included in addition to them.
- the electrochemical potential difference between Al and In is very large, but if an Al natural oxide film exists, the ionization of Al does not proceed. However, once the natural oxide film is broken and directly bonded to In, the potential difference rapidly promotes the ionization of Al. At that time, In is present in a highly dispersed state in the Al crystal grains as it is without being chemically changed. Since In has a low melting point (157 ° C.) and does not form a solid solution with Al, a material obtained by melting Al and In so as to have a uniform composition while paying attention to the difference in density between Al and In is used. When thermal spraying is performed on the substrate according to the flame spraying method, a desired film is obtained by rapid solidification and its compression effect.
- the added In is highly dispersed in the Al crystal grains by the flame spraying process, and is kept in direct contact with Al. Since In does not form a stable layer with Al, the Al / In interface retains high energy and reacts violently at the contact surface with moisture in an atmosphere where moisture exists.
- the reaction product mainly composed of AlOOH is pulverized without filming on the surface due to the mechanical action caused by the expansion of the generated H 2 bubbles. Dispersed into the liquid, the dissolution reaction proceeds continuously and explosively at the reaction interface that is renewed one after another.
- the Al—In system behavior as described above is more remarkable when the Al purity is higher, that is, when 4N and 5N than when 2N and 3N.
- the Al sprayed film is manufactured by forming a film on the surface of the substrate to be processed in a predetermined atmosphere using a composite material made of Al—In in accordance with a flame spraying method. That is, 4NAl and In are prepared, 2-5 wt% In is mixed with Al, In is uniformly dissolved in Al, processed into a rod or wire shape, and this is used as a thermal spray material. Desired by spraying and rapidly solidifying and coating the surface of the base material to be a constituent member for a film forming chamber such as a deposition plate of a film forming apparatus using Ar or N 2 as a spraying gas by a flame spraying method The base material provided with the water reactive Al sprayed film can be manufactured. The sprayed film thus obtained is a film in which In crystal grains (grain size of 10 nm or less) are uniformly and highly dispersed in Al crystal grains.
- the flame spraying process is preferably performed at a wire feed rate of 1.5 to 3.5 cm / sec and a blowing gas (Ar or N 2 ) flow rate of 500 to 1120 L / min.
- a blowing gas Ar or N 2
- the wire feed speed is low (speed less than 1.5 cm / sec)
- the droplets become small and are likely to be oxidized.
- the wire feed speed is high (speed over 3.5 cm / sec)
- the droplets Becomes difficult to be oxidized, and the obtained Al sprayed film is hardly completely dissolved.
- the amount of sprayed gas is small (amount less than 500 L / min)
- the sprayed particle velocity is reduced and oxidation tends to occur.
- the flow rate of sprayed gas is large (amount exceeding 1120 L / min)
- the obtained Al sprayed film is obtained. The higher the heat history temperature, the lower the solubility.
- the Al sprayed film made of the above 4NAl-In composite material has high activity in the state formed through the flame spraying process, and its solubility in an atmosphere containing moisture is too good to handle.
- a predetermined amount of Si is added to this material, the resulting Al sprayed film is less active and easy to handle, and the film after thermal history becomes very active and contains moisture. It exhibits high solubility (activity) in the atmosphere. Therefore, depending on the composition ratio of In and Si, there is a case where the powder is pulverized at normal temperature in the atmosphere. In that case, in a dry atmosphere (even in a vacuum atmosphere) to prevent reaction with moisture in the atmosphere. It is preferable to store.
- 4NAl, In, and Si are prepared, and 2 to 5 wt% In and the amount of impurity Si in 4NAl are taken into account with respect to this Al, and the total amount of impurities is 0.04 to 0.6 wt%. %, Preferably 0.04 to 0.2 wt% of Si is mixed, In and Si are uniformly dissolved in Al, and processed into a rod or wire shape as a thermal spray material.
- Ar or N 2 is used as a spraying gas and sprayed onto the surface of a base material to be a constituent member for a film forming chamber such as a deposition plate of a film forming apparatus to rapidly cool and solidify and coat the desired water.
- a substrate provided with a reactive Al sprayed film can be produced. As described above, the sprayed film thus obtained is a film in which In is uniformly and highly dispersed in Al crystal grains.
- the activity that is, the solubility
- the activity can be controlled while being formed by spraying. It becomes possible to prevent dissolution of the Al sprayed film due to reaction with moisture, and handling becomes easier.
- the upper limit of the temperature due to the thermal history in the film formation chamber is about 300 ° C.
- an Al composite material to which 0.04 to 0.6 wt%, preferably 0.05 to 0.5 wt% of Si is added is used.
- the Al sprayed film made of the 4NAl-Bi composite material has a very high activity in the state formed through the spraying process and has an atmosphere in which moisture exists. Solubility in the inside is too good to handle. Moreover, there is little decrease in the reactivity (solubility) of the film after passing through the thermal history.
- Si is added to this 4NAl—Bi composite material
- the resulting Al sprayed film is less active and easy to handle, and the sprayed film after thermal history becomes very active, It exhibits high solubility (activity) in an atmosphere where moisture exists.
- the above-described method for producing a water-reactive Al film by flame spraying in an Ar, N 2 atmosphere of the present invention can also be applied to an Al sprayed film made of 4NAl—Bi—Si.
- the sprayed film thus obtained is a film in which Bi is uniformly and highly dispersed in Al crystal grains.
- the amount of Si to be added is 0.7 wt%, Bi and Si are uniformly dissolved in Al, and processed into a rod or wire shape as a thermal spray material.
- Ar is used as a blowing gas.
- N 2 is rapidly solidified by blowing on the surface of the substrate on which the film-forming chamber for the components of the adhesion-preventive plate or the like of the film forming apparatus, with the desired water-reactive thermally sprayed Al film by coating group
- the material can be manufactured.
- the sprayed film thus obtained is a film in which Bi is uniformly and highly dispersed in Al crystal grains.
- the solubility can be controlled while being formed by thermal spraying. It becomes possible to prevent dissolution of the sprayed film due to reaction with moisture, and handling becomes easier. Moreover, when this Al sprayed film undergoes a thermal history, the activity increases as the Si addition amount increases and the temperature increases due to the thermal history, and the solubility increases. Just leave it for 2-3 hours to powder. However, the solubility is lost when 0.8 wt% or more of Si is added.
- the amount of impurity Cu present in Al has a great influence on the solubility of the Al sprayed film after the thermal history. If the Cu content is high, that is, if it exceeds 40 ppm, the solubility of the Al sprayed film after passing through a high-temperature thermal history is inferior, and even if the temperature of water is increased during the peeling process of the adhered film, it is difficult to peel off. In addition, when the Cu content is in the range of 30 to 40 ppm, it is necessary to increase the temperature of water for peeling treatment of the adhered film (for example, 100 ° C. or more), and for 30 ppm or less, the temperature is low (for example, 80 ° C.).
- the Al film can be sufficiently dissolved with the following water), and the adhered film can be peeled off. Furthermore, if the Cu content is 10 ppm or less, the solubility of the Al sprayed film that has undergone a thermal history at a high temperature (about 300 to 350 ° C.) is even better.
- the method for producing a water-reactive Al film by flame spraying according to the present invention described above includes Al—In (and / or Bi) and Al—In (and / or Bi) using 4NAl or 5NAl having a predetermined amount of impurity Cu. It can also be applied to the production of an Al sprayed film made of -Si. These Al sprayed films are manufactured, for example, as follows.
- a material added with at least one metal selected from Bi is dissolved so as to have a uniform composition, and processed into a rod or wire shape as a thermal spray material. 2 is sprayed onto the surface of a base material that is a constituent member for a film forming chamber, such as a deposition plate of a film forming apparatus, rapidly solidified, and coated to provide a desired water-reactive Al sprayed film. Can be manufactured.
- the sprayed film thus obtained is a sprayed film in which In (and / or Bi) is present in a highly dispersed state in Al crystal grains as described above.
- the amount of the material is 0.04 to 0.6 wt% in the case of Al—In and 0.25 to 0.7 wt% in the case of Al—Bi in total with the amount of impurity Si present in Al.
- a material obtained by adding Si may be used.
- the reactivity with water decreases, and when the upper limit is exceeded, the reactivity with water becomes very high, and in the atmosphere May react with moisture. If Si is less than the lower limit, the effect of controlling the reactivity with water is reduced, and if it exceeds the upper limit, the reactivity with water itself is reduced.
- the reaction starts immediately after immersion, and hydrogen gas
- water becomes black due to the deposited In or the like and finally the sprayed film is completely dissolved, and Al, In and the like remain as precipitates in the hot water. This reaction proceeds more vigorously as the water temperature is higher.
- a member having a surface covered with the water-reactive Al film is used as a deposition chamber constituent member such as a deposition plate or a shutter provided in the deposition chamber of the deposition apparatus, After the number of film forming processes, the deposited film can be easily peeled off from the film forming chamber constituent member to which the film forming material has inevitably adhered, and valuable metals can be easily recovered.
- the stripping solution simply using water such as pure water, water vapor, or an aqueous solution without using chemicals, it is possible to avoid damage due to dissolution of the constituent members for the film forming chamber such as a deposition plate, The number of times of reuse increases dramatically compared to the case where chemicals are used. In addition, since no chemicals are used, processing costs are greatly reduced and environmental conservation is achieved. Furthermore, since many film-forming materials adhering to the film-forming chamber components such as a deposition plate do not dissolve in water, there is an advantage that the same composition as the film-forming material can be recovered as a solid in the same form. . Furthermore, not only does the recovery cost drop dramatically, but the recovery process is simplified, which has the advantage of expanding the range of recoverable materials.
- the sprayed film made of the water-reactive Al composite material of the present invention is applied to a film forming chamber constituent member such as a deposition plate.
- the deposited film made of the film forming material can be peeled off by immersing the film forming chamber constituent member having the film inevitably adhered during the film formation in water or by spraying water vapor.
- rare metals can be recovered. The recovery cost is low, and the film forming material can be recovered with high quality.
- 3NAl, 4NAl, and 5NAl were used as Al, and the relationship between Al purity and In concentration in the following Al-In composition and the solubility of the obtained sprayed film was compared.
- the addition amount of In is based on Al weight.
- the base material with the thermal spray film before being subjected to the heat treatment (0 ° C.) and the base material with the thermal spray film after the heat treatment are immersed in 300 ml of pure water at 80 ° C., and the solubility of each thermal spray film is determined by the current of the immersion liquid. The density was measured and examined. The obtained results are shown in FIG. In FIG. 1, the horizontal axis is the heat treatment temperature (° C.), and the vertical axis is the dissolution current density (mA / cm 2 ).
- 3NAl and 4NAl were used as Al, and the relationship between the sprayed gas species in the flame spraying method with the following Al—In composition and the solubility of the obtained sprayed film was compared.
- the addition amount of In is based on Al weight.
- the substrate with the thermal spray film in the state before being subjected to the heat treatment (0 ° C.) and the substrate with the thermal spray film after the heat treatment are immersed in 300 ml of pure water at 60 ° C. or 80 ° C., and the solubility of each thermal spray film is immersed.
- the current density of the liquid was measured and examined. The obtained results are shown in FIG. In FIG. 2, the horizontal axis represents the heat treatment temperature (° C.), and the vertical axis represents the dissolution current density (mA / cm 2 ).
- 3A the horizontal axis represents the wire feed rate (cm / sec)
- the vertical axis represents the dissolution current density (mA / cm 2 )
- the horizontal axis represents the heat treatment temperature (° C. )
- the vertical axis is the dissolution current density (mA / cm 2 )
- the horizontal axis is the gas (air) flow rate (L / min)
- the vertical axis is the dissolution current density ( mA / cm 2 ).
- Platinum (Pt) film formation was performed using a sputtering apparatus provided with a deposition plate having a surface coated with a 4NAl-3 wt% In (spraying gas: N 2 ) sprayed film (film thickness 200 ⁇ m) obtained in Example 1. After 30 cycles, the Pt-attached adhesion plate was removed and treated with hot water at 80 ° C., and the sprayed film was dissolved in 30 minutes. As shown in FIG. 4, the Pt adhesion film was removed. Peeled off. For this reason, Pt which is a film forming material could be easily recovered. At this time, AlOOH was precipitated in addition to In in the warm water.
- This example shows an example in which Si is added to control the activity (solubility) of the obtained Al sprayed film.
- the substrate with the thermal spray film in a state before being subjected to the heat treatment (0 ° C.) and the substrate with the thermal spray film after the heat treatment (after the thermal history) were immersed in 300 ml of pure water at 80 ° C.
- the solubility was examined by measuring the current density of the immersion liquid. The obtained results are shown in FIG. In FIG. 5, the horizontal axis is the heat treatment temperature (° C.), and the vertical axis is the dissolution current density (mA / cm 2 ).
- the activity of the sprayed film before being subjected to heat treatment that is, the solubility
- the solubility can be controlled while being formed by thermal spraying. It becomes possible to prevent the sprayed film from being dissolved by the reaction with moisture.
- the upper limit of the temperature due to the thermal history in the film formation chamber is about 300 ° C.
- an Al composite material to which 0.04 to 0.6 wt%, preferably 0.05 to 0.5 wt% of Si is added is used.
- Example 4 a sprayed film was formed in the same manner as in Example 4 (spraying gas: Ar).
- Each sprayed coating thus obtained was subjected to heat treatment (in the atmosphere, for 1 hour, furnace cooling) in the same manner as in Example 4.
- the substrate with the thermal spray film in a state before being subjected to the heat treatment (0 ° C.) and the substrate with the thermal spray film after the heat treatment (after the thermal history) were immersed in 300 ml of pure water at 80 ° C. The solubility was examined by measuring the current density of the immersion liquid.
- Example 4 As a result, the same tendency as in Example 4 was obtained.
- a predetermined amount of Si it was possible to control the activity, that is, the solubility, of the sprayed film before being subjected to the heat treatment while it was formed by spraying.
- the upper limit of the heat treatment temperature is about 300 ° C.
- an Al sprayed film is formed using an Al composite material in which the amount of In added is 2 wt% or more and 0.04 to 0.6 wt% of Si is added
- the upper limit of the heat treatment temperature is as high as about 350 ° C.
- an Al composite material with an In addition amount of 2 wt% or more and 0.04 to 0.2 wt% of Si added is used. It has been found that practical solubility can be obtained by forming a sprayed film.
- Example 4 Using a sputtering apparatus provided with an adhesion-preventing plate whose surface was coated with the 4NAl-3 wt% In-0.1 wt% Si sprayed film (film thickness 200 ⁇ m) obtained in Example 4, the process was performed as described in Example 3. A film process was performed, and a peel test of the adhered film was performed. In the same manner as in Example 3, the sprayed film was dissolved, and the Pt adhesion film was peeled off from the deposition preventing plate.
- the base material with the thermal spray film before being subjected to the heat treatment (0 ° C.) and the base material with the thermal spray film after the heat treatment are immersed in 300 ml of pure water at 80 ° C., and the solubility of each thermal spray film is determined by the current of the immersion liquid. The density was measured and examined. The obtained result is shown in FIG. In FIG. 6, the horizontal axis is the heat treatment temperature (° C.), and the vertical axis is the dissolution current density (mA / cm 2 ).
- the solubility of the Al film was examined in the same manner as described above by changing the temperature of the immersion water to 40 ° C, 60 ° C and 80 ° C. The result is shown in FIG. In FIG. 7, the horizontal axis is the heat treatment temperature (° C.), and the vertical axis is the dissolution current density (mA / cm 2 ).
- Reference Example 2 In view of the result of Reference Example 1, 4NAl was used, and Bi and Si were added (total amount with impurity Si amount) in the Al—Bi—Si composition. The relationship with solubility was examined. The amount of Bi and Si added is based on Al weight.
- a flame type flame spray (heat source: C 2 H 2 —O 2 A sprayed film was formed by spraying on the surface of the aluminum substrate using N 2 (spraying gas flow rate: 800 L / min) as a spraying gas with a gas of about 3000 ° C. and a wire feed rate: 2 cm / sec.
- N 2 spraying gas flow rate: 800 L / min
- Each thermal spray film thus obtained was subjected to heat treatment at 0 to 350 ° C. (in the atmosphere, for 1 hour, furnace cooling).
- the substrate with the thermal spray film in a state before being subjected to the heat treatment (0 ° C.) and the substrate with the thermal spray film after the heat treatment (after the thermal history) were immersed in 300 ml of pure water at 80 ° C.
- the solubility was examined by measuring the current density of the immersion liquid. The obtained results are shown in FIG. In FIG. 8, the horizontal axis represents the heat treatment temperature (° C.), and the vertical axis represents the dissolution current density (mA / cm 2 ).
- the activity of the Al sprayed film that is, the solubility of the Al sprayed film before being subjected to heat treatment while being formed by thermal spraying. Therefore, it is possible to prevent dissolution of the Al sprayed film due to reaction with moisture in the atmosphere.
- the Al sprayed film that has undergone heat treatment tends to increase in activity and increase in solubility with an increase in Si addition amount and an increase in heat treatment temperature.
- the solubility is increased. Will disappear.
- the Al sprayed film that had been heat-treated at 250 ° C. was pulverized in 2 to 3 hours when left at room temperature in the atmosphere.
- a flame type flame spray (heat source: C 2 H 2 —O 2 gas, about 3000 A sprayed film was formed on the surface of the aluminum substrate using Ar (spraying gas flow rate: 800 L / min) as a spraying gas at a temperature of ° C and a wire feed rate: 2 cm / sec.
- Ar spraying gas flow rate: 800 L / min
- Each thermal spray film thus obtained was subjected to heat treatment at 0 to 350 ° C. (in the atmosphere, for 1 hour, furnace cooling).
- the substrate with the thermal spray film in a state before being subjected to the heat treatment (0 ° C.) and the substrate with the thermal spray film after the heat treatment (after the thermal history) were immersed in 300 ml of pure water at 80 ° C.
- the solubility was examined by measuring the current density of the immersion liquid. The obtained results are shown in FIG. In FIG. 9, the horizontal axis represents the heat treatment temperature (° C.), and the vertical axis represents the dissolution current density (mA / cm 2 ).
- the solubility of the 2NAl to 4NAl Al sprayed film is in a good range.
- the solubility of the 4NAl in the Al sprayed film when the amount of impurity Cu is below the detection limit is higher than that of 2NAl and 3NAl.
- the melting current density is 50 mA / cm 2 or more at a heat treatment temperature of 350 ° C., and it can be dissolved.
- the sprayed film that has been subjected to the heat treatment at 350 ° C. did not have sufficient solubility. In this case, it could not be dissolved even when the treatment liquid temperature was 100 ° C.
- ⁇ 4NAl (impurity Cu: below detection limit) -3wt% In ⁇ 4NAl (impurity Cu: ⁇ 10ppm) -3wt% In ⁇ 4NAl (impurity Cu: 40ppm) -2.5wt% In ⁇ 4NAl (impurity Cu: 40ppm) -3wt% In ⁇ 4NAl (impurity Cu: 10ppm) -3wt% In ⁇ 4NAl (impurity Cu: 20ppm) -3wt% In ⁇ 4NAl (impurity Cu: 30ppm) -2.5wt% In
- a flame type flame spray (heat source: C 2 H 2 —O 2 gas, about 3000 A sprayed film was formed by spraying on the surface of the aluminum substrate using Ar (spraying gas flow rate: 800 L / min) as a spraying gas at a temperature of ° C and wire feeding speed: 2 cm / sec.
- Ar spraying gas flow rate: 800 L / min
- Each thermal spray film thus obtained was subjected to heat treatment at 0 to 350 ° C. (in the atmosphere, for 1 hour, furnace cooling).
- the substrate with the thermal spray film in a state before being subjected to the heat treatment (0 ° C.) and the substrate with the thermal spray film after the heat treatment (after the thermal history) were immersed in 300 ml of pure water at 80 ° C.
- the solubility was examined by measuring the current density of the immersion liquid. The obtained result is shown in FIG. In FIG. 10, the horizontal axis represents the heat treatment temperature (° C.), and the vertical axis represents the dissolution current density (mA / cm 2 ).
- the solubility of the 4NAl sprayed Al film is in a range where the dissolution current density is sufficiently high and can be dissolved.
- the amount of impurity Cu is less than 40 ppm
- the melting current density is 50 mA / cm 2 or more at a heat treatment temperature of 300 to 350 ° C., and it can be dissolved.
- the film that has been subjected to the heat treatment at 350 ° C. cannot be sufficiently dissolved, but the film that has undergone the heat treatment at 300 ° C. has a dissolution current density of 50 mA / cm 2 or more. Yes, it was fully dissolved.
- the treatment liquid temperature was set to 100 ° C., the film that had been heat-treated at 350 ° C. could be dissolved.
- the surface of the film forming chamber component in the vacuum film forming apparatus for forming a metal or metal compound thin film by sputtering, vacuum deposition, ion plating, CVD, or the like reacts with water. Therefore, the unavoidable adhesion film adhering to the surface of the film forming chamber constituent member during the film forming process can be peeled off and collected in an atmosphere containing moisture. Therefore, the present invention increases the number of times the constituent members for the film forming chamber are reused and includes valuable metals in the field where these film forming apparatuses are used, for example, in the technical field such as semiconductor elements and electronic equipment. It can be used to recover the membrane material.
Abstract
Description
・3NAl-3wt%In
・3NAl-4wt%In
・4NAl-2wt%In
・4NAl-3wt%In
・4NAl-4wt%In
・5NAl-1.5wt%In
・5NAl-2.5wt%In
・5NAl-3.5wt%In
・3NAl-3wt%In(吹き付けガス:N2)
・3NAl-3wt%In(吹き付けガス:Air)
・4NAl-3wt%In(吹き付けガス:N2)
・4NAl-3wt%In(吹き付けガス:Air)
・4NAl-3wt%In-0.05wt%Si(このうち、不純物Si:90ppm)
・4NAl-3wt%In-0.1wt%Si(このうち、不純物Si:100ppm)
・4NAl-3wt%In-0.2wt%Si(このうち、不純物Si:100ppm)
・4NAl-2.6wt%In-0.5wt%Si(このうち、不純物Si:100ppm)
・4NAl-3wt%In-0.1wt%Si(このうち、不純物Si:100ppm)
・4NAl-4wt%In-0.5wt%Si(このうち、不純物Si:100ppm)
・5NAl-1.5wt%In-0.05wt%Si(このうち、不純物Si:100ppm)
・5NAl-2.6wt%In-0.1wt%Si(このうち、不純物Si:100ppm)
・5NAl-3.5wt%In-0.5wt%Si(このうち、不純物Si:100ppm)
Alとして2NAl及び4NAlを用い、以下のAl-Bi組成におけるAl純度とBi濃度と得られた溶射膜の溶解性との関係を比較検討した。Biの添加量は、Al重量基準である。
・ 2NAl-0.5wt%Bi
・ 2NAl-1wt%Bi
・ 4NAl-0.2wt%Bi
・ 4NAl-0.5wt%Bi
・ 4NAl-1wt%Bi
参考例1の結果に鑑み、4NAlを用い、Bi及びSiを添加(不純物Si量との合計量)したAl-Bi-Si組成におけるBi添加量と、Si添加量と、得られた溶射膜の溶解性との関係を検討した。Bi及びSiの添加量は、Al重量基準である。
・4NAl-1wt%Bi-0.25wt%Si(このうち、不純物Si:90pm)
・4NAl-1wt%Bi-0.5wt%Si(このうち、不純物Si:100ppm)
・4NAl-1.4wt%Bi-0.7wt%Si(このうち、不純物Si:100ppm)
・4NAl-1wt%Bi-0.85wt%Si(このうち、不純物Si:100ppm)
参考例2で得られた4NAl-1wt%Bi-0.5wt%Si溶射膜(膜厚200μm)で表面が被覆された防着板を設けたスパッタリング装置を用いて白金(Pt)成膜を30サイクル実施した後、このPtの付着した防着板を取り外し、80℃の温水により処理したところ、20分で溶射膜が溶解し、Ptの付着膜が防着板から剥離した。このため、成膜材料であるPtを容易に回収できた。この際、温水中にはBiの他にAlOOHが沈殿していた。
2NAl、3NAl及び4NAlを用い、Inを添加したAl-In組成におけるAl純度と、Al中の不純物Cu量と、得られた溶射膜の溶解性との関係を検討した。Inの添加量は、Al重量基準である。
・3NAl(不純物Cu:70ppm)-3wt%In
・3NAl(不純物Cu:検出限界以下)-3wt%In
・4NAl(不純物Cu:検出限界以下)-3wt%In
本参考例では、4NAlを用い、Inを添加したAl-In組成における不純物Cuの量と、得られた溶射膜の溶解性との関係を検討した。Inの添加量は、Al重量基準である。
・4NAl(不純物Cu:<10ppm)-3wt%In
・4NAl(不純物Cu:40ppm)-2.5wt%In
・4NAl(不純物Cu:40ppm)-3wt%In
・4NAl(不純物Cu:10ppm)-3wt%In
・4NAl(不純物Cu:20ppm)-3wt%In
・4NAl(不純物Cu:30ppm)-2.5wt%In
Claims (4)
- 4NAl又は5NAlに、Al基準で、2~5wt%のInを添加した材料を組成が均一になるように溶融し、この溶融材料を、フレーム溶射法により基材表面に対して溶射して急冷凝固させることにより、Al結晶粒中にInが均一に分散してなるAl膜を形成することを特徴とする水反応性Al膜の製造方法。
- 4NAl又は5NAlに、Al基準で、2~5wt%のIn、及びAl中の不純物Si量を勘案して、不純物Si量との合計で0.04~0.6wt%となる量のSiを添加した材料を組成が均一になるように溶融し、この溶融材料を、フレーム溶射法により基材表面に対して溶射し、急冷凝固させることにより、Al結晶粒中にInが均一に分散してなるAl膜を形成することを特徴とする水反応性Al膜の製造方法。
- 請求項1又は2記載の方法により製造された水反応性Al膜を表面に備えたことを特徴とする成膜装置の成膜室用構成部材。
- 前記構成部材が、防着板、シャッター又はマスクであることを特徴とする請求項3記載の成膜室用構成部材。
Priority Applications (5)
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US12/989,974 US20110041760A1 (en) | 2008-04-30 | 2009-04-27 | Method for the production of water-reactive al film and constituent member for film-forming chamber |
RU2010148765/02A RU2468116C2 (ru) | 2008-04-30 | 2009-04-27 | СПОСОБ ПОЛУЧЕНИЯ РЕАГИРУЮЩЕЙ С ВОДОЙ Al ПЛЕНКИ И СОСТАВЛЯЮЩИЙ ЭЛЕМЕНТ ПЛЕНКООБРАЗУЮЩЕЙ КАМЕРЫ |
JP2010510106A JP5371964B2 (ja) | 2008-04-30 | 2009-04-27 | 水反応性Al膜の製造方法及び成膜室用構成部材 |
CN2009801154095A CN102016100B (zh) | 2008-04-30 | 2009-04-27 | 水反应性Al膜的制造方法及成膜室用构成部件 |
EP09738773.2A EP2281914B1 (en) | 2008-04-30 | 2009-04-27 | PROCESS FOR PRODUCTION OF WATER-REACTIVE Al FILM AND CONSTITUENT MEMBERS FOR FILM DEPOSITION CHAMBERS |
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US (1) | US20110041760A1 (ja) |
EP (1) | EP2281914B1 (ja) |
JP (1) | JP5371964B2 (ja) |
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CN (1) | CN102016100B (ja) |
MY (1) | MY152991A (ja) |
RU (1) | RU2468116C2 (ja) |
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WO2012090774A1 (ja) * | 2010-12-27 | 2012-07-05 | シャープ株式会社 | 蒸着装置および回収装置 |
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AT391183B (de) * | 1988-09-14 | 1990-08-27 | Alois Liemberger Fa | Beleuchtungskoerper |
US8715404B2 (en) * | 2008-04-30 | 2014-05-06 | Ulvac, Inc. | Water-reactive Al composite material, water-reactive Al film, process for the production of the Al film, and constituent member for film-forming chamber |
CN103240484A (zh) * | 2012-02-01 | 2013-08-14 | 上海科秉电子科技有限公司 | 一种用于u型槽内层表面的粗糙化方法 |
ITBA20130034A1 (it) * | 2013-04-30 | 2014-10-31 | Mrs S R L | Metodo per la pulizia di superfici in apparati di deposizione di film sottili da fase vapore e per il recupero del materiale rimosso |
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WO2012090774A1 (ja) * | 2010-12-27 | 2012-07-05 | シャープ株式会社 | 蒸着装置および回収装置 |
JP5319022B2 (ja) * | 2010-12-27 | 2013-10-16 | シャープ株式会社 | 蒸着装置および回収装置 |
US9365927B2 (en) | 2010-12-27 | 2016-06-14 | Sharp Kabushiki Kaisha | Deposition method and collection method |
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CN102016100A (zh) | 2011-04-13 |
MY152991A (en) | 2014-12-31 |
EP2281914A4 (en) | 2011-04-20 |
KR20100135323A (ko) | 2010-12-24 |
US20110041760A1 (en) | 2011-02-24 |
TW201009121A (en) | 2010-03-01 |
SG189755A1 (en) | 2013-05-31 |
TWI465605B (zh) | 2014-12-21 |
EP2281914A1 (en) | 2011-02-09 |
JP5371964B2 (ja) | 2013-12-18 |
CN102016100B (zh) | 2013-04-10 |
EP2281914B1 (en) | 2015-02-25 |
JPWO2009133836A1 (ja) | 2011-09-01 |
RU2010148765A (ru) | 2012-06-10 |
RU2468116C2 (ru) | 2012-11-27 |
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