WO2011158404A1 - ベルジャー清浄化方法、多結晶シリコンの製造方法、およびベルジャー用乾燥装置 - Google Patents
ベルジャー清浄化方法、多結晶シリコンの製造方法、およびベルジャー用乾燥装置 Download PDFInfo
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- WO2011158404A1 WO2011158404A1 PCT/JP2011/001319 JP2011001319W WO2011158404A1 WO 2011158404 A1 WO2011158404 A1 WO 2011158404A1 JP 2011001319 W JP2011001319 W JP 2011001319W WO 2011158404 A1 WO2011158404 A1 WO 2011158404A1
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- bell jar
- polycrystalline silicon
- pressure
- drying
- cleaning
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
- F26B5/042—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum for drying articles or discrete batches of material in a continuous or semi-continuous operation, e.g. with locks or other air tight arrangements for charging/discharging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/02—Silicon
- C01B33/021—Preparation
- C01B33/027—Preparation by decomposition or reduction of gaseous or vaporised silicon compounds other than silica or silica-containing material
- C01B33/035—Preparation by decomposition or reduction of gaseous or vaporised silicon compounds other than silica or silica-containing material by decomposition or reduction of gaseous or vaporised silicon compounds in the presence of heated filaments of silicon, carbon or a refractory metal, e.g. tantalum or tungsten, or in the presence of heated silicon rods on which the formed silicon is deposited, a silicon rod being obtained, e.g. Siemens process
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- 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
- C23C16/4407—Cleaning of reactor or reactor parts by using wet or mechanical methods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/12—Drying solid materials or objects by processes not involving the application of heat by suction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G13/00—Appliances or processes not covered by groups F28G1/00 - F28G11/00; Combinations of appliances or processes covered by groups F28G1/00 - F28G11/00
Definitions
- the present invention relates to a technology for cleaning a bell jar used for the production of polycrystalline silicon, and more specifically, to efficiently remove moisture on the inner wall surface of a bell jar that causes impurities to be mixed into polycrystalline silicon. It relates to a method and a device enabling it.
- High-purity polycrystalline silicon is a single crystal silicon substrate for manufacturing semiconductor devices and a raw material for manufacturing solar cells.
- High-purity polycrystalline silicon is generally manufactured in a batch system by a method (Siemens method) in which a silicon-containing reaction gas, which is a raw material gas, is converted into high-purity silicon by thermal decomposition or hydrogen reduction and deposited on a thin silicon filament rod.
- a silicon-containing reaction gas which is a raw material gas
- a general deposition reaction vessel used for the production of high-purity polycrystalline silicon is composed of a metallic base plate (base plate) and a metallic bell jar installed on the base plate, and the inside of the bell jar is a reaction space. Become.
- the deposition reaction vessel must be capable of being cooled and capable of sealing the gas inside the bell jar. This is because the above-mentioned reaction gas is corrosive and tends to ignite or explode when mixed with air.
- the polycrystalline silicon precipitation reaction described above is performed in a batch system, it is inevitable that the inner surface of the bell jar comes into contact with the atmosphere when the polycrystalline silicon is taken out of the bell jar.
- the silicon-containing reaction gas that is the raw material gas and chlorosilanes and halogen gases by-produced by the precipitation reaction remain, but these react with moisture in the atmosphere. Then, it is known that the gas exhibits strong corrosiveness.
- the corrosive gas described above activates and exposes harmful substances (for example, boron, aluminum, phosphorus, arsenic, antimony, etc.) that degrade the quality of polycrystalline silicon from the structural members on the inner surface of the bell jar.
- harmful substances for example, boron, aluminum, phosphorus, arsenic, antimony, etc.
- the deposition bell jar is cleaned with high-purity water or carbon dioxide pellets for each batch or every few batches, thereby purifying the inner surface.
- Patent Documents 1 and 2 and JP-A-2009-196882 disclose inventions of such a cleaning apparatus and a cleaning method using the same.
- the precipitation reactor (bell jar) for producing polycrystalline silicon is opened for each batch in order to take out the product from the inside. Then, cleaning is performed for each batch or for several batches to clean the inner surface.
- the conventional cleaning method in which the bell jar is heated with steam or the like and at the same time the inside of the bell jar is replaced with high-purity nitrogen gas or the like completely removes moisture in a short time. While this is difficult, it has become clear that the quality of the polycrystalline silicon produced in the next batch tends to deteriorate when the drying time is increased.
- the present invention has been made in view of the problems of the conventional bell jar cleaning technology described above, and the object is to efficiently remove moisture from the inner surface of the bell jar and finish the cleaning of the bell jar in a short time.
- the present invention is to provide a technique that contributes to the production of high-purity polycrystalline silicon by increasing the cleanliness of the inner surface of the bell jar.
- the bell jar cleaning method according to the present invention is a bell jar cleaning method used in the production of polycrystalline silicon by the Siemens method, and after the cleaning step using the water of the bell jar, The bell jar is provided with a drying step of removing moisture by reducing the pressure so that the pressure inside the bell jar is lower than the vapor pressure of water at the inner surface temperature.
- the drying step is a drying step in which a vacuum pump having a vacuum reachability of 200 Pa or less is used to perform a pressure reducing operation so that the pressure inside the bell jar becomes 1000 Pa or less.
- the bell jar cleaning method according to the present invention preferably includes a step of introducing a high-purity inert gas with reduced water content and returning the internal pressure to atmospheric pressure inside the bell jar following the drying step. .
- the method for producing polycrystalline silicon according to the present invention is a method for producing polycrystalline silicon in which a polycrystalline silicon deposition step by the Siemens method is repeated a plurality of times, and after the completion of the precipitation step, the next batch Before the precipitation step, there is a step of cleaning a bell jar used for depositing the polycrystalline silicon, and the step of cleaning the bell jar includes a water cleaning step for cleaning the bell jar with water and the water cleaning.
- a drying step that follows the step, and the drying step, after the water washing step, using a vacuum pump having a vacuum attainment capability of 200 Pa or less, by performing a pressure reducing operation that the pressure inside the bell jar becomes 1000 Pa or less, Removing water by reducing the pressure so that the inside of the bell jar has a pressure lower than the vapor pressure of water at the inner surface temperature, and the water washing Extent to after completion of the time until the drying process ends than 1.2 hours, wherein the.
- the step of cleaning the bell jar further includes a step of introducing a high-purity inert gas with reduced moisture into the bell jar to return the internal pressure to atmospheric pressure following the drying step.
- the time from the end of the water washing step to the end of the drying step is 0.8 hours or less. More preferably, the time from the end of the water washing step to the end of the drying step is set to 0.4 hours or less.
- the drying step is terminated when 5 minutes have elapsed after the pressure inside the bell jar becomes 1000 Pa or less.
- the drying apparatus for a bell jar is an apparatus for drying a bell jar used for producing polycrystalline silicon by the Siemens method, and the apparatus can form an airtight space by placing the bell jar.
- a vacuum line for reducing the pressure in the airtight space and a dry gas line for returning the pressure in the airtight space to normal pressure are also provided.
- the present invention instead of the conventional method of removing moisture by increasing the temperature of the bell jar surface, adopting a method of efficiently removing moisture by lowering the pressure inside the bell jar to below the boiling point of water; Therefore, moisture is efficiently removed from the inner surface of the bell jar, and cleaning of the bell jar can be completed in a short time. As a result, the cleanliness of the inner surface of the bell jar is increased, which greatly contributes to improving the quality of the manufactured high purity polycrystalline silicon.
- FIG. 1 is a diagram for explaining a configuration example of a bell jar drying apparatus of the present invention.
- the bell jar drying apparatus is a bell jar drying apparatus used for producing polycrystalline silicon, and the bell jar includes a metal bell jar 1 and a metal base plate (base plate) 2 for installing the bell jar 1.
- the inside of the container is hermetically sealed by packing indicated by reference numeral 3.
- the interior of the bell jar 1 installed on the base plate 2 becomes a space for the precipitation reaction of polycrystalline silicon.
- a pressure gauge 4, a gas introduction line 5, and a gas exhaust line 6 are connected to the base plate 2 so that the internal pressure of the bell jar 1 can be monitored and gas can be introduced and exhausted.
- a vacuum pump 7 is provided in the path of the gas exhaust line 6, and the internal pressure of the bell jar is reduced by this vacuum pump 7 so as to be lower than the vapor pressure of water.
- an automatic valve or the like is installed on the suction side of the vacuum pump 7 so that oil in the vacuum pump 7 does not flow backward to the bell jar 1 when the vacuum pump 7 is stopped.
- the vacuum pump 7 be of a low contamination type such as a dry vacuum pump.
- the capacity of the vacuum pump may be selected according to the size of the bell jar to be used, as long as it has a vacuum reachability of approximately 200 Pa or less.
- the bell jar itself used for producing polycrystalline silicon also constitutes a part of the drying apparatus, but the present invention is not limited to this embodiment.
- the internal pressure of the bell jar is reduced by the vacuum pump 7 so as to be lower than the vapor pressure of water, thereby efficiently removing water and drying the bell jar in a short time. Will end.
- a small amount of amorphous silicon, silane chloride polymer, or the like adheres to the inner surface of the bell jar used for the polycrystalline silicon precipitation reaction. It activates and exposes harmful substances to the quality of the product, and prevents the bell jar from being cleaned. For this reason, in order to produce high-purity polycrystalline silicon, it is necessary to efficiently remove the water adhering to the inner surface of the bell jar after the cleaning is completed to suppress the generation of the contaminants.
- the present inventors have conducted a method of efficiently removing moisture by lowering the pressure inside the bell jar to below the boiling point of water. It was decided to adopt.
- the advantage of adopting this method is that the drying time is shortened by increasing the efficiency of moisture removal.
- the cleanliness of the inner wall of the bell jar at the stage of preparing for the next polycrystalline silicon manufacturing process after cleaning the bell jar after the polycrystalline silicon manufacturing process is Rather than the total opening time inside the bell jar, it depends more on the time from the cleaning of the bell jar to the end of drying. Therefore, when the drying process takes a long time as in the conventional drying method, the inner wall of the bell jar cannot be kept clean, and the risk of deteriorating the quality of the polycrystalline silicon in the next manufacturing process increases. . In this sense as well, it is very effective to shorten the drying time by efficiently removing moisture from the inner surface of the bell jar in order to produce high-purity polycrystalline silicon.
- the dry state of the bell jar can be monitored with a vacuum gauge as the simplest method. More accurate determination of the dry state can be made based on the degree of reduced pressure. Specifically, the determination can be made by determining that the degree of reduced pressure becomes a value unique to a drying apparatus including a vacuum pump and a bell jar upon completion of moisture evaporation.
- the drying state of the apparatus can be confirmed by stopping the drying of the bell jar under reduced pressure, returning it to normal pressure with a drying gas, and then measuring the dew point of the gas in the drying apparatus at normal pressure. Based on such data, for example, it is possible to create an operation standard for the drying process for setting the dew point to ⁇ 40 ° C. or lower or ⁇ 60 ° C. or lower.
- the drying state is confirmed based on the degree of vacuum. For example, when the degree of vacuum reaches 1000 Pa or less and 5 minutes have elapsed, the dew point is -40 ° C. or less and the drying is completed. To do.
- the heat capacity of the whole bell jar is large. This is because the temperature of the inner surface of the bell jar is unlikely to change even if heat is removed by evaporation of moisture.
- the advantage of adopting the technique of removing moisture by lowering the pressure inside the bell jar to below the boiling point of water is that the amount of high purity gas consumed in the drying operation can be greatly saved.
- a high purity inert gas is used as a carrier gas for discharging evaporated water to the outside of the bell jar and as a replacement gas for preventing moisture from being re-adsorbed inside the bell jar after the water removal. Is required in large quantities.
- Table 1 shows, for 12 polycrystalline silicon production batches, the bell jar opening time, the time from the completion of the water washing process of the bell jar to the assembly time for the next batch polycrystalline silicon production reactor, and the electrical resistivity of the polycrystalline silicon. This is a summary of the results of the investigation.
- FIG. 2 is a diagram for explaining the results of examining the relationship between the opening time of the bell jar and the electrical resistivity of polycrystalline silicon.
- the opening time of the bell jar means a time during which the bell jar is in an open state from the end of the polycrystalline silicon manufacturing process to the start of the next polycrystalline silicon manufacturing process. Specifically, after the polycrystalline silicon manufacturing process of the previous batch is completed, the bell jar is opened and the polycrystalline silicon is taken out, and the bell jar is cleaned (conveying, washing with water, conveying, removing moisture on the inner surface, The time from the completion of assembly as a reactor for the next batch of polycrystalline silicon production process is the opening time of the bell jar.
- FIG. 2 shows that the electrical resistivity of the polycrystalline silicon tends to decrease as the opening time increases.
- the decrease in electrical resistivity means that the level of electrically active impurities taken into the polycrystalline silicon becomes higher, and the purity of the polycrystalline silicon tends to be hindered as the open time becomes longer. You can see that That is, it can be read that the shortening of the bell jar opening time described above is effective for the production of high-purity polycrystalline silicon.
- FIG. 3 is a diagram for explaining the results of investigating the relationship between the time from the end of the water washing of the bell jar to the end of drying and the electrical resistivity of the polycrystalline silicon.
- the end of the drying step here is the end of the drying step when the vacuum is maintained for 10 minutes after the pressure gauge reaches a certain value under reduced pressure by the vacuum pump.
- the time from the end of the water washing of the bell jar to the end of drying and the electrical resistivity of the polycrystalline silicon can be approximated by a straight line obtained by the least square method, and the electrical resistance of the polycrystalline silicon increases as the time increases. It can be seen that the rate is low. In other words, in order to control the quality of the polycrystalline silicon, it is effective to shorten the time from the end of the water washing process to the end of the drying process rather than the opening time of the bell jar itself. It can be seen that reducing the time is a very effective technique for the production of bell jar high purity polycrystalline silicon.
- the bell jar 1 is opened, the bell jar 1 is moved to a cleaning device, and a cleaning operation is performed by a normal procedure. After this cleaning operation is completed, the bell jar 1 is placed on the base plate 2 by a crane or the like, and the drying device is assembled. In this state, the vacuum pump 7 is operated so that the pressure in the bell jar 1 is equal to or lower than the water vapor pressure. By this decompression, the moisture adhering to the inner surface of the bell jar 1 in the cleaning process is discharged out of the bell jar 1.
- the set pressure at the time of depressurization needs to be set so that the inside of the bell jar 1 is lower than the vapor pressure of water at the inner surface temperature, but when a vacuum pump having a vacuum reachability of approximately 200 Pa or less is used. Can reach the desired dry state in a short time without particularly worrying about the temperature.
- the internal pressure of the bell jar 1 reaches 1000 Pa or less when confirming that the pressure gauge is dry.
- the end of drying can be completed when 5 minutes have elapsed, but when considering the stability of the apparatus, the pressure reduction is preferably continued for 5 minutes or more. By observing the behavior of the pressure gauge for this duration, it can also be confirmed that there is no abnormality in the monitor system.
- the operation of the vacuum pump 7 is stopped, and a high-purity inert gas not containing moisture is introduced into the bell jar 1 to set the internal pressure to atmospheric pressure.
- the introduction of the high-purity inert gas is to suppress re-entry of moisture into the bell jar 1, and a gas having a dew point of ⁇ 40 ° C. or less is desirable. Nitrogen gas is desirable as the inert gas.
- the cleaned bell jar 1 and the base plate 2 are assembled as early as possible as a reactor for producing polycrystalline silicon, and in a standby state for producing the next batch, that is, with an inert gas such as hydrogen or nitrogen, cleanliness is achieved. It is preferable to maintain the state.
- Table 2 shows the results of investigating the relationship with the reduced pressure maintaining time in the dry state when a bell jar with an internal volume of 3.5 m 3 was dried by the method of the present invention.
- the degree of vacuum attainment in the specifications of the vacuum pump apparatus itself used at this time is 20 Pa
- the degree of internal vacuum became 1000 Pa or less after 7 minutes, and thereafter 1000 Pa or less was maintained.
- high purity nitrogen gas was introduced into the chamber to return to atmospheric pressure, and a dew point was measured by flowing nitrogen gas (carrier gas) at a flow rate of 200 normal liters / minute.
- the dew point of the carrier gas was less than -40 ° C when the reduced pressure was released with a carrier gas in a reduced pressure holding time of 7 minutes, and reached -61 ° C in 10 minutes or more. It was confirmed that it was in a state.
- Table 3 shows that a heating medium by steam heating is introduced into a bell jar jacket having the same internal volume as described above, and the bell jar is heated and held at about 110 ° C., and 200 normal liters / minute (dew point ⁇ 72 ° C.) is stored in the bell jar It is the result of supplying high-purity nitrogen gas and evaluating the dew point of the nitrogen gas (carrier gas) with a dew point meter.
- FIG. 4 is a diagram for explaining the configuration of the bell jar drying system used in this measurement.
- reference numeral 8 denotes a jacket
- reference numeral 9 denotes a heat medium circulation path
- reference numerals 10 and 11 denote a heat exchanger and a heat exchanger, respectively. It is a medium circulation pump.
- the time until the dew point of the carrier gas reaches ⁇ 60 ° C. or lower, which is a standard for drying, is 8 hours or more, and it takes about 50 times as long as the present invention.
- moisture is efficiently removed from the inner surface of the bell jar, and the cleaning time of the bell jar can be shortened.
- a technology that contributes to the production of high purity polycrystalline silicon by increasing the cleanliness of the inner surface of the bell jar.
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Abstract
Description
2 ベースプレート
3 パッキン
4 真空計
5 ガス導入ライン
6 ガス排気ライン
7 真空ポンプ
8 ジャケット
9 熱媒循環経路
10 熱交換器
11 熱媒循環ポンプ
Claims (9)
- ジーメンス法による多結晶シリコン製造に用いられるベルジャーの清浄化方法であって、
前記ベルジャーの水を用いる洗浄工程後に、該ベルジャー内部が内表面温度における水の蒸気圧よりも低い圧力となるように減圧して水分を除去する乾燥工程を備えているベルジャー清浄化方法。 - 前記乾燥工程は、200Pa以下の真空到達能力を有する真空ポンプを用い、前記ベルジャー内部の気圧が1000Pa以下となる減圧操作を行う乾燥工程である請求項1記載のベルジャー清浄化方法。
- 前記乾燥工程に続き、前記ベルジャーの内部に水分を低下させた高純度不活性ガスを導入して内圧を大気圧に戻す工程を備えている請求項1又は2に記載のベルジャー清浄化方法。
- ジーメンス法による多結晶シリコンの析出工程を複数回繰り返して行う多結晶シリコンの製造方法であって、
前記析出工程の終了後であって、次のバッチの析出工程の前に、前記多結晶シリコンの析出に用いられるベルジャーを清浄化する工程を有し、
該ベルジャーの清浄化工程は、前記ベルジャーを水を用いて洗浄する水洗浄工程と該水洗浄工程に続く乾燥工程とを備え、
前記乾燥工程は、前記水洗浄工程後に、200Pa以下の真空到達能力を有する真空ポンプを用いて前記ベルジャー内部の気圧が1000Pa以下となる減圧操作を行うことにより、前記ベルジャー内部が内表面温度における水の蒸気圧よりも低い圧力となるように減圧して水分を除去する工程であり、且つ、前記水洗浄工程終了後から乾燥工程終了までの時間を1.2時間以下とする、ことを特徴とする多結晶シリコンの製造方法。 - 前記ベルジャーの清浄化工程は、さらに、前記乾燥工程に続き、前記ベルジャーの内部に水分を低下させた高純度不活性ガスを導入して内圧を大気圧に戻す工程を備えている請求項4に記載の多結晶シリコンの製造方法。
- 前記水洗浄工程終了後から乾燥工程終了までの時間を0.8時間以下とする請求項4又は5に記載の多結晶シリコンの製造方法。
- 前記水洗浄工程終了後から乾燥工程終了までの時間を0.4時間以下とする請求項6に記載の多結晶シリコンの製造方法。
- 前記乾燥工程を、前記ベルジャー内部の気圧が1000Pa以下となった後5分経過した時点で終了させる請求項4又は5に記載の多結晶シリコンの製造方法。
- ジーメンス法による多結晶シリコン製造に用いられるベルジャーを乾燥させるための装置であり、該装置は、前記ベルジャーを載置することによって気密空間を形成することができると共に、前記気密空間内の気圧を減圧するための真空ラインと、前記気密空間内の気圧を常圧に戻すための乾燥気体ラインを有することを特徴とするベルジャー用乾燥装置。
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CN201180029911.1A CN102985364B (zh) | 2010-06-16 | 2011-03-07 | 钟罩清洁化方法、多晶硅的制造方法以及钟罩用干燥装置 |
EP11795312.5A EP2583943B1 (en) | 2010-06-16 | 2011-03-07 | Method for manufacturing polycrystalline silicon |
AU2011266575A AU2011266575B2 (en) | 2010-06-16 | 2011-03-07 | Method for cleaning bell jar, method for manufacturing polycrystalline silicon and device for drying bell jar |
JP2012520242A JP5699145B2 (ja) | 2010-06-16 | 2011-03-07 | ベルジャー清浄化方法、多結晶シリコンの製造方法、およびベルジャー用乾燥装置 |
US13/704,767 US9126242B2 (en) | 2010-06-16 | 2011-03-07 | Method for cleaning bell jar, method for producing polycrystalline silicon, and apparatus for drying bell jar |
US14/822,378 US20150345862A1 (en) | 2010-06-16 | 2015-08-10 | Method for cleaning bell jar, method for producing polycrystalline silicon, and apparatus for drying bell jar |
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US13/704,767 A-371-Of-International US9126242B2 (en) | 2010-06-16 | 2011-03-07 | Method for cleaning bell jar, method for producing polycrystalline silicon, and apparatus for drying bell jar |
US14/822,378 Division US20150345862A1 (en) | 2010-06-16 | 2015-08-10 | Method for cleaning bell jar, method for producing polycrystalline silicon, and apparatus for drying bell jar |
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JP2017528407A (ja) * | 2014-08-18 | 2017-09-28 | ワッカー ケミー アクチエンゲゼルシャフトWacker Chemie AG | 多結晶シリコンの製造方法 |
CN110753675A (zh) * | 2017-06-08 | 2020-02-04 | 株式会社德山 | 清洗装置以及清洗方法 |
WO2021100415A1 (ja) * | 2019-11-21 | 2021-05-27 | 株式会社トクヤマ | 多結晶シリコンの製造装置および多結晶シリコンの製造方法 |
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DE102013209076A1 (de) * | 2013-05-16 | 2014-11-20 | Wacker Chemie Ag | Reaktor zur Herstellung von polykristallinem Silicium und Verfahren zur Entfernung eines Silicium enthaltenden Belags auf einem Bauteil eines solchen Reaktors |
CN104482725B (zh) * | 2014-12-15 | 2016-05-25 | 上海明兴开城超音波科技有限公司 | 一种清洗零件的低压干燥法和它的装置 |
CN108213018B (zh) * | 2018-01-26 | 2021-01-01 | 广州从化珠江啤酒分装有限公司 | 一种洗瓶机安全防护系统 |
CN114798554B (zh) * | 2022-04-14 | 2022-11-04 | 北京华林嘉业科技有限公司 | 立式半导体外延石英炉管钟罩及石英件清洗机 |
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- 2011-03-07 US US13/704,767 patent/US9126242B2/en active Active
- 2011-03-07 JP JP2012520242A patent/JP5699145B2/ja active Active
- 2011-03-07 AU AU2011266575A patent/AU2011266575B2/en not_active Ceased
- 2011-03-07 CN CN201180029911.1A patent/CN102985364B/zh active Active
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CN110753675A (zh) * | 2017-06-08 | 2020-02-04 | 株式会社德山 | 清洗装置以及清洗方法 |
WO2021100415A1 (ja) * | 2019-11-21 | 2021-05-27 | 株式会社トクヤマ | 多結晶シリコンの製造装置および多結晶シリコンの製造方法 |
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JP5699145B2 (ja) | 2015-04-08 |
US20150345862A1 (en) | 2015-12-03 |
CN102985364B (zh) | 2015-05-20 |
AU2011266575B2 (en) | 2013-08-01 |
US20130089489A1 (en) | 2013-04-11 |
JPWO2011158404A1 (ja) | 2013-08-15 |
CN102985364A (zh) | 2013-03-20 |
EP2583943A4 (en) | 2015-10-07 |
EP2583943B1 (en) | 2022-08-31 |
US9126242B2 (en) | 2015-09-08 |
EP2583943A1 (en) | 2013-04-24 |
AU2011266575A1 (en) | 2013-01-31 |
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