WO2008068844A1 - 酸素分圧制御装置及びガス供給方法 - Google Patents
酸素分圧制御装置及びガス供給方法 Download PDFInfo
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- WO2008068844A1 WO2008068844A1 PCT/JP2006/324238 JP2006324238W WO2008068844A1 WO 2008068844 A1 WO2008068844 A1 WO 2008068844A1 JP 2006324238 W JP2006324238 W JP 2006324238W WO 2008068844 A1 WO2008068844 A1 WO 2008068844A1
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- Prior art keywords
- gas
- purified
- tank
- partial pressure
- supply
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/30—Controlling by gas-analysis apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
- B01D53/326—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00 in electrochemical cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/12—Oxygen
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
Definitions
- the present invention relates to an oxygen partial pressure control device and a gas supply method.
- Patent Document 1 a method for producing a single crystal sample or the like using an atmospheric gas whose oxygen partial pressure is controlled by an oxygen partial pressure control apparatus having an electrochemical oxygen pump containing a solid electrolyte.
- the oxygen partial pressure control device shown in FIG. 9 has a mass flow controller (MFC) 3 that controls the flow rate of the inert gas that has passed through the valve 2 to a set value, and the inert gas that has passed through this mass flow controller 3.
- MFC mass flow controller
- Electrochemical oxygen pump 4 that can be controlled to the partial pressure of oxygen, and supply to the next process (equipment) such as a sample growth device by monitoring the oxygen partial pressure of the inert gas controlled by the oxygen pump 4 It has an oxygen sensor 5 for gas.
- this apparatus compares the monitored value by the oxygen sensor 5 with the set value by the oxygen partial pressure setting unit 6 and sends it from the oxygen pump 4 to set a desired oxygen partial pressure value.
- An oxygen partial pressure control unit 7 for controlling the oxygen partial pressure of the inert gas to be discharged to a predetermined value and an oxygen partial pressure display unit 8 for displaying a monitor value by the oxygen sensor 5 are provided.
- the oxygen partial pressure in the inert gas is about 10- 4 atm.
- the electrochemical oxygen pump 4 has electrodes 4b and 4c made of platinum formed on both the inner and outer surfaces of a solid electrolyte cylindrical body 4a having oxide ion conductivity.
- the solid electrolyte cylindrical body 4a is, for example, a zirconia-based solid electrolyte, and is heated by a heater (not shown).
- An inert gas is supplied in the axial direction from one opening of the solid electrolyte cylindrical body 4a to the other opening.
- the inert gas is, for example, Ar + O ( 10_4 atm). Both inside and outside
- Is treated gas controlled to the target oxygen partial pressure by reducing oxygen molecules, and is sent to the next process (device).
- the oxygen pump 4 of FIG. 10 can also perform a pump operation by applying a direct-current voltage having the opposite polarity between the electrodes 4b and 4c on both the inner and outer surfaces of the solid electrolyte cylindrical body 4a.
- a direct-current voltage having the opposite polarity between the electrodes 4b and 4c on both the inner and outer surfaces of the solid electrolyte cylindrical body 4a.
- oxygen molecules in the gas such as air flowing along the outer surface of the solid electrolyte cylindrical body 4a (O )
- the oxygen partial pressure of the inert gas flowing inside the material cylindrical body 4a is increased and fed to the outside.
- a gas with a controlled oxygen partial pressure is supplied by such an oxygen pump, crystal growth, alloying, heat treatment, semiconductor manufacturing process, etc., under an atmosphere such as an inert gas with a controlled oxygen partial pressure. Can be done.
- Patent Document 1 Japanese Patent Laid-Open No. 2002-326887
- the oxygen pump shown in FIG. 10 uses one circular pipe-shaped solid electrolyte cylindrical body. That is, the gas to be treated is caused to flow in the axial direction into the internal space of the single solid electrolyte cylindrical body, and the ionic conductivity is pumped inside and outside the solid electrolyte partition wall while flowing through the solid electrolyte cylindrical body.
- the gas flow rate that can be processed by such a gas pump is proportional to the contact area between the gas to be processed and the outer surface of the solid electrolyte cylindrical body. Therefore, in order to increase the gas flow rate, it is necessary to increase the contact area between the gas to be processed and the outer surface of the solid electrolyte cylindrical body.
- the solid electrolyte cylindrical body it is conceivable to lengthen the solid electrolyte cylindrical body or increase the pipe diameter.
- the resistance value of the oxygen pump is affected by the shape of the solid electrolyte (surface area and thickness), electrode film, and lead terminals.
- the solid electrolyte shape has a larger surface area and a smaller resistance value. Becomes smaller. In other words, considering a cylindrical body, a thin shape with a large diameter and length is preferable.
- the present invention can be supplied to another apparatus such as a sample preparation chamber without depleting gas (purified gas) with controlled oxygen partial pressure.
- a sample preparation chamber without depleting gas (purified gas) with controlled oxygen partial pressure.
- an oxygen partial pressure control device and a gas supply method capable of efficiently performing a work (sample preparation work) using a gas.
- the oxygen partial pressure control apparatus of the present invention includes a gas purification unit that purifies a gas with oxygen partial pressure controlled in a range of 0.2 to 10_3 (> atmospheric pressure), and a purification that is purified by the gas purification unit.
- the source gas filled in the tank is circulated through this circulation circuit, and the purified gas purified by the gas purification unit can be stored in the tank. For this reason, purified gas can be stably supplied to another apparatus.
- the circulation circuit includes a plurality of tanks, a first switching unit that switches between supply permission and stoppage of the purified gas purified by the gas purification unit, and other purified gas in each tank.
- a second switching means for switching between supply allowance to the apparatus and supply stoppage. The second switching means is switched to allow supply of purified gas from at least one tank to another apparatus, and the first switching means. In the gas supply permissible state with this one tank power, the purified gas is purified to the tank where the supply of the purified gas to the other equipment has been completed.
- purified gas can be stored in a plurality of tanks, it is possible to improve the supply capacity of purified gas to other devices. At least one tank force can be supplied to the other equipment by switching the second switching means, and the purified gas can be supplied to the other equipment by switching the first switching means.
- the refined gas purified by the gas purification unit can be supplied to the tank after the completion of the process.
- the purified gas can be purified to the tank in which the supply of purified gas has been completed. For this reason, the purified gas can be supplied to other apparatuses without being continuously cut.
- the circulation circuit includes a plurality of gas purification units, and a third switching unit that switches between allowing and stopping the supply of the purified gas to the tanks of each gas purification unit.
- the gas can be circulated to an arbitrary gas purification unit among the plurality of gas purification units.
- the gas purification capability can be increased, and the purified gas can be stably supplied to other devices. Since the gas can be circulated to an arbitrary gas purification unit among the plurality of gas purification units by switching the third switching means, for example, when the demand for purified gas is small, one gas purification unit The refined gas can be purified by the above, and when there is a large demand for purified gas, the purified gas can be purified by multiple gas purification units.
- the circulation circuit includes a plurality of tanks, a plurality of gas purification units, a first switching unit that switches between supply allowance and supply stop of the purified gas purified by the gas purification units to each tank, A second switching means for switching between supply allowance and supply stop for the refined gas in the tank and a third switch means for switching between supply allowance and supply stop for the purified gas from each gas purification section to the tank And switching the second switching means to allow the supply of purified gas from at least one tank to another device, and by switching the first switching means, in the gas supply permitting state from this one tank, Purified gas can be purified to a tank that has finished supplying purified gas to other equipment, and the gas can be circulated to any of the gas purification units by switching the third switching means. it can.
- purified gas can be stored in a plurality of tanks, supply of purified gas to other devices Ability can be improved.
- the gas purification capacity can be increased, and the purified gas can be stably supplied to other apparatuses.
- the purified gas can be purified to a tank that has finished supplying purified gas to other devices, and the purified gas is not continuously cut to other devices. Can be supplied.
- the purified gas can be purified by one gas purification unit, or the purified gas can be purified by a plurality of gas purification units.
- the gas purification unit includes an electrochemical oxygen pump that can control the inert gas to a target oxygen partial pressure, and an oxygen sensor that monitors the oxygen partial pressure of the inert gas. Moreover, it is possible to arrange the oxygen sensors on the upstream side and the downstream side of the oxygen pump.
- the gas supply method of the present invention is a gas supply method for supplying a refined gas having a controlled oxygen partial pressure in the range of 0.2 to 10_3 atm to another apparatus, the purified gas Are stored in a plurality of tanks, and at least one tank force supplies purified gas to another device, and after the gas supply in this tank is completed, purified gas is supplied from other tanks to other devices.
- the purified gas is stored in a tank that has been supplied with the purified gas.
- At least one tank force can supply purified gas to another device, and after supply of purified gas to the other device is completed Will supply purified gas to other equipment with other tank power.
- a tank that has run out of purified gas can be supplied with purified gas and stored during the supply of gas from other tanks.
- the purified gas purified in the gas purification unit can be stored in the tank, and the purified gas can be stably supplied to other apparatuses.
- the purified gas is purified by the gas circulating in the circulation circuit, the purified gas in a clean state can be purified, and high-quality purified gas can be supplied to other devices. That is, if the purified gas supplied to other devices is returned and sequentially supplied to the gas purification unit, there is a risk of quality deterioration that is difficult to maintain the talin state.
- purified gas can be stored in a plurality of tanks, the ability to supply purified gas to other devices can be improved.
- Gas purification capability by providing multiple gas purification units The force can be increased, and the purified gas can be stably supplied to other apparatuses. For this reason, it is possible to sufficiently cope with an apparatus that requires a large amount of purified gas, and the use for supplying gas is not limited.
- the purified gas can be stored in the gas supply of other tanks to the tank which has no purified gas by the switching of the first switching means and the second switching means. Therefore, the purified gas can be continuously supplied to other devices, and the processing using this purified gas can be stably performed in the other devices.
- the gas purification unit includes an electrochemical oxygen pump that can control the gas to a target oxygen partial pressure, and an oxygen sensor that monitors the oxygen partial pressure of the gas. That is, the gas controlled to the target oxygen partial pressure can be purified by the oxygen pump, and the oxygen partial pressure of the purified gas can be inspected to stabilize the gas controlled to the target oxygen partial pressure. Can be supplied to the tank. In addition, by arranging oxygen sensors upstream and downstream of the oxygen pump, it becomes easy to adjust the gas to be purified by the oxygen pump, and the gas that is controlled to a more accurate oxygen partial pressure is purified. be able to.
- the purified gas can be stored in the tank in which the purified gas is exhausted while the gas is supplied to the other tanks. For this reason, the purified gas can be continuously supplied to another apparatus, and the process using this purified gas can be stably performed in the other apparatus.
- FIG. 1 is a simplified diagram of an oxygen partial pressure control apparatus showing an embodiment of the present invention.
- FIG. 2 is a simplified diagram of the oxygen partial pressure control device showing a process of filling a raw material gas into a tank.
- FIG. 3 is a simplified diagram of the oxygen partial pressure control device showing a gas purification step.
- FIG. 4 is a simplified diagram of the oxygen partial pressure control apparatus showing the process of supplying purified gas to the sample preparation chamber by the first tank force and the purification process of the second tank.
- FIG. 5 is a simplified diagram of the oxygen partial pressure control device showing a purified gas supply process to the sample preparation chamber and a gas filling process to the first tank by the second tank force.
- FIG. 6 is a simplified diagram of the oxygen partial pressure control apparatus showing a purified gas supply process from the second tank to the sample preparation quality and a gas purification process of the first tank.
- FIG. 7 is a simplified diagram of the oxygen partial pressure control device showing a purified gas supply process to a sample preparation chamber with a first tank force and a raw material gas filling process to a second tank.
- FIG. 8 is a simplified diagram of an oxygen partial pressure control device showing another embodiment of the present invention.
- FIG. 9 is a simplified diagram of a conventional oxygen partial pressure control device.
- FIG. 10 is an explanatory diagram of the principle of an oxygen pump.
- FIG. 1 shows an oxygen partial pressure control apparatus according to the present invention.
- This oxygen partial pressure control apparatus includes a plurality of (two in the illustrated example) tanks (buffer tanks) 20A and 20B, and 0.2 to 10_3.
- a recirculation circuit 19 having a gas purification unit 21 for purifying a gas whose oxygen partial pressure is controlled in the range of atmospheric pressure, and tanks 20A and 20B are filled with the purified gas purified by the gas purification unit 21, and the tank 20A 20B is supplied to another device (eg, sample preparation chamber).
- another device eg, sample preparation chamber
- the gas purification unit 21 includes an electrochemical oxygen pump 14 that can control the gas to a target oxygen partial pressure, and an upstream side that monitors the oxygen partial pressure of the inert gas before flowing into the oxygen pump 14.
- the oxygen sensor 15A and the oxygen partial pressure of the gas controlled by the oxygen pump 14 are monitored on the downstream side.
- an oxygen sensor 15B is also, on the upstream side of the upstream oxygen sensor 15A.
- the pressure adjustment valve (REG) 22 that adjusts the pressure of the gas that has passed through the switching valve 12 and the gas flow rate that has passed through the pressure adjustment valve (REG) are set.
- a mass flow controller (MFC) 13 for controlling the value is arranged.
- the oxygen pump 14 has electrodes formed of platinum on both the inner and outer surfaces of a solid electrolyte cylindrical body having oxide ion conductivity, that is, the oxygen pump 14 has the same configuration as the oxygen pump 4 shown in FIG. Things can be used. Therefore, the description of the configuration and principle of the oxygen pump 14 is omitted here.
- the oxygen sensors 15A and 15B may be formed by forming electrodes made of platinum on both the inner and outer surfaces of a solid electrolyte cylindrical body having oxide ion conductivity. Then, the potential difference between the inner surface side electrode and the outer surface side electrode can be measured, and the Nernst equation force oxygen partial pressure based on thermodynamics can be obtained.
- the oxygen partial pressure control device also includes oxygen partial pressure setting unit 16 that sets a desired oxygen partial pressure value, and monitor values from upstream oxygen sensor 15A and downstream oxygen sensor 15B.
- the oxygen partial pressure control unit 17 such as a PID control system for controlling the oxygen partial pressure of the gas delivered from the oxygen pump 14 to a predetermined value
- An oxygen partial pressure display unit 18 for displaying the oxygen partial pressure set value and the monitor values by the oxygen sensors 15A and 15B is provided.
- the first circulation path 25 includes a main body pipe 29 that is force-interposed with a flow rate adjusting valve 27, a pump (for example, a diaphragm pump) 28, and first and second branch pipes 30a branched from the main body pipe 29. 30b.
- the branch pipes 30a and 30b are provided with switching valves 31 and 32, respectively.
- the second circulation path 26 includes a main body pipe 34 provided with a switching valve 33, and first and second branch pipes 35a and 35b branched from the main body pipe 34.
- the branch pipes 35a and 35b are provided with switching valves 36 and 37, respectively.
- the second circulation path 26 is connected to an outflow path 38 for supplying purified gas to another device (for example, a sample preparation chamber or the like).
- the outflow path 38 includes a downstream pipe 40 in which the MFC 39 is interposed, a connecting pipe 41a connecting the downstream pipe 40 and the first branch pipe 35a of the second circulation path 26, and the downstream pipe 40 and the second circulation. And a connecting pipe 41b connecting the second branch pipe 35b of the passage 26.
- Pressure regulating valves (REG) 42 and 43 and switching valves 44 and 45 are interposed in the connecting pipes 41a and 41b, respectively.
- the oxygen partial pressure is controlled within the range of 0.2 to 10 _3 ° atm for the process of filling the tank 20A and 20B shown in Fig. 2 with the source gas and the source gas of each tank 20A and 20B shown in Fig. 3. And the process of purifying the source gas of the second tank 20B into the purified gas while blowing (supplying) the purified gas of the first tank 20A shown in FIG. And filling the source gas into the first tank 20A shown in FIG. 5 and blowing (supplying) the purified gas from the second tank 20B to the sample preparation chamber, etc., and the first tank shown in FIG.
- the switching valves 31, 32 of the first circulation path 25 are opened, the switching valves 33, 36, 37, 44, 45 of the second circulation path 26 are closed, and the pump 28 Drive.
- the raw material gas flows into the first circulation path 25 through the switching valve 12 of the gas inflow path 24 and the gas purification unit 21.
- the raw material gas flows into the main body pipe 29 of the first circulation path 25, the flow rate is adjusted by the flow rate adjusting valve 27, and the branch paths 30a, 30b of the first circulation path 25 are passed through the pump 28.
- the raw material gas flowing into the tanks 20A, 20B It does not flow into the second circuit 26. That is, as shown by the arrow A, the untreated raw material gas flows through the gas inflow path 24, the gas purification section 21, the first circulation path 25, the tanks 20A and 20B, and is sequentially supplied to the tanks 20A and 20B. Is done.
- the switching valve 12 is closed from the state shown in FIG. 2 to the closed state of the second circulation path 26 as shown in FIG. Open the switching valves 33, 36, and 37.
- the circulation circuit 19 including the tanks 20A, 20B, the second circulation path 26, the gas purification unit 21, and the first circulation path 25 is configured, and by driving the pump 28, The gas circulates in the circulation circuit 19 as shown by an arrow B.
- the gas flowing through the gas purifying unit 21 is purified by the gas purifying unit 21. That is, the oxygen partial pressure setting unit 16 sets a desired oxygen partial pressure, for example, 1 X 10 " 21 to 1 X 10 _3 atm. Then, the oxygen partial pressure set by the oxygen partial pressure setting unit 16 is set. Is sent from the oxygen partial pressure control unit 17 to the oxygen pump 14. The current I of the oxygen pump 14 is controlled by the control signal, passes through the REG22 and the mass flow controller (MFC) 13, and passes through the oxygen pump. The oxygen partial pressure in the gas supplied to 14 is controlled to an oxygen partial pressure of about 1 ⁇ 10 21 to 1 ⁇ 10_3 (> atmospheric pressure) set by the oxygen partial pressure setting unit 16.
- MFC mass flow controller
- the oxygen partial pressure of the gas flowing through the gas purification unit 21 is monitored by the upstream oxygen sensor 15A and the downstream oxygen sensor 15B, and the monitored value is displayed on the oxygen partial pressure display unit 18. And input to the oxygen partial pressure control unit 17.
- the monitor value monitored by the oxygen sensors 15A and 15B is input to the oxygen partial pressure control unit 17, and compared with the set value set by the oxygen partial pressure setting unit 16, and the oxygen partial pressure by the oxygen pump 14 is compared. It is checked whether the gas whose gas is controlled is controlled to the oxygen partial pressure set by the oxygen partial pressure setting unit 16. If the oxygen partial pressure monitored by the oxygen sensor 15B does not match the oxygen partial pressure set by the oxygen partial pressure setting unit 16, the control signal is sent from the oxygen partial pressure control unit 17 to the oxygen pump 14.
- 1 X 10 21 to 1 X 10 _3 (> oxygen controlled partial pressure of oxygen (purified gas) (purified gas) 1st circuit 25 Supplied to.
- purified gas is supplied to the tanks 20A and 20B, and the tanks 20A and 20B force
- the amount of gas flowing into the tanks 20A and 20B (mixed gas of purified gas and untreated raw material gas) flows out to the second circulation path 26, and this gas flows through the gas purification section 21 again.
- This Yotsute, supplied gas is controlled to an oxygen partial pressure of about 1 X 10 _21 ⁇ 1 X 10 _3 atm gas flowing in the gas refining section 21 (purified gas) into the first circulation path 25. That is, when the gas flows in the circulation circuit 19, the gas is purified to a gas controlled to an oxygen partial pressure of about 1 ⁇ 10 21 to 1 ⁇ 10_3 atm in the tanks 20A and 20B.
- the purified gas in each of the tanks 20A and 20B is sent to the sample preparation chamber.
- the purified gas in the first tank 20A is first blown into the sample preparation chamber. That is, from the state shown in FIG. 3, as shown in FIG. 4, the switching valve 31 of the first circulation path 25 is closed, the switching valve 36 of the second circulation path 26 is closed, and the switching valve 44 is opened.
- the purified gas in the positive pressure first tank 20 A flows out to the first connection pipe 41 a of the outflow path 38. Then, the purified gas is blown into the sample preparation chamber via a mass flow controller (MFC) 39 that controls the flow rate of the purified gas that has passed through the pressure regulating valve (REG) 42 to a set value. That is, the purified gas in the first tank 20A flows through the outflow path 38 as shown by arrow C1 and is supplied to the sample preparation chamber.
- MFC mass flow controller
- the circulation circuit 19B including the second tank 20B, the branch pipe 35b, the main body pipe 34, the gas purification unit 21, the main body pipe 29, and the branch pipe 30b is replaced with the gas in the tank 20B. Circulates as shown by arrow B1, and gas purification continues.
- the purified gas in the positive pressure second tank 20B is blown into the sample preparation chamber. That is, from the state shown in FIG. 4, as shown in FIG. 5, the switching valve 31 of the first circulation path 25 is opened and the switching valve 32 is closed. Further, the switching valves 33, 37 and 44 of the second circulation path 26 are closed, and the switching valve 45 is opened.
- the purified gas in the second tank 20B flows out to the first connection pipe 41b of the outflow path 38.
- the gas is then blown into the sample preparation chamber via a mass flow controller (MFC) 39 that controls the flow rate of the gas passing through the pressure regulating valve (REG) 43 to a set value. That is, the purified gas of the second tank 20B flows through the outflow path 38 as indicated by arrow C2 and is supplied to the sample preparation chamber.
- MFC mass flow controller
- REG pressure regulating valve
- the raw material gas flows to the gas inlet 24, the gas purification unit 21, the main pipe 29 and the branch pipe 30a of the first circulation path 25, the first tank 20A, and the first gas 20 Supplyed to the tank 20A, the first tank 20A is filled with the raw material gas.
- the raw material gas charged in the first tank 20A is to be purified. That is, from the state shown in FIG. 5, as shown in FIG. 6, the switching valves 36 and 33 of the second circulation path 25 are opened. Accordingly, the circulation circuit 19A constituted by the first tank 20A, the branch pipe 35a and the main pipe 34 of the first circulation path 26, the gas purification unit 21, the main pipe 29 and the branch pipe 30a of the first circulation path 25. The gas will circulate as shown by arrow B2.
- the gas in the first tank 20A is purified again.
- the purified gas in the second tank 20B flows through the outflow path 38 as shown by arrow C2 and is supplied to the sample preparation chamber.
- the raw material gas flows through the gas inflow path 24, the gas purification section 21, the main pipe 29 of the first circulation path 25, the branch pipe 30b, and the second tank 20B as indicated by an arrow A2. It is supplied to the second tank 20B, and the second tank 20B is filled with the raw material gas.
- the refined gas also flows into the connecting pipe 41a of the gas outflow path 38 in the first tank 20A. That is, the purified gas in the first tank 20A flows through the outflow passage 38 as shown by the arrow C1 and is supplied to the sample preparation chamber. Thereafter, returning to the step shown in FIG. 4, the above steps are repeated until the operation of the apparatus stops.
- the sample preparation chamber, oxygen partial purification gas pressure is controlled to 2 X 10- 1 ⁇ 1 X 10 _3 atmospheres are continuously supplied.
- the purified gas purified by the gas purification unit 21 can be stored in the tank 20, and the purified gas can be stably supplied to other apparatuses.
- the purified gas is purified by the gas circulating in the circulation circuit 19, it is possible to purify the purified gas in a clean state and supply high-quality purified gas to other devices. That is, in the case where the purified gas supplied to other devices is returned and sequentially supplied to the gas purification unit 21, there is a possibility that the quality is deteriorated, which is difficult to maintain a clean state. Since the purified gas can be stored in a plurality of tanks 20, the ability to supply purified gas to other devices can be improved.
- the switching valve 31, 32, etc. can constitute the first switching means 51 for switching the supply allowance and the supply stop of the purified gas purified by the gas purification section 21 to each tank.
- the second switching means 52 for switching the supply of the purified gas in each tank 20A, 20B to other devices and the supply stop can be configured.
- the first switching means 51 and the second switching means 52 are switched so that the other device ( (Refer to the sample preparation chamber, etc.)
- the second tank 20B which has finished supplying purified gas to other equipment, is filled with raw material gas and purified by the gas purification unit 21 be able to.
- the gas circulated in the apparatus and the purified gas can be continuously blown out to other apparatuses.
- processing using purified gas can be performed stably.
- the first switching means 51 and the second switching means 52 can be configured by combinations of switching valves arbitrarily selected from switching valves 31, 32, 33, 36, 37, 44, 45, etc. .
- the gas purification unit 21 includes an electrochemical oxygen pump 14 that can control the source gas to a target oxygen partial pressure, and an oxygen sensor 15 that monitors the oxygen partial pressure of the gas. That is, the gas controlled to the target oxygen partial pressure can be purified by the oxygen pump 20, and the oxygen can be inspected for the purified gas to control the target oxygen partial pressure. Gas can be stably supplied to the tank. Also, connect the oxygen sensors 15A and 15B upstream of the oxygen pump 14. By arranging them on the downstream side, the gas to be purified by the oxygen pump 14 can be easily adjusted, and the gas controlled to a more accurate oxygen partial pressure can be purified.
- FIG. 8 shows another embodiment, and in this case, a plurality (two in the illustrated example) of gas purification units 21 A and 21 B are provided. Since each gas purification unit 21A, 21B has the same configuration as each gas purification unit 21 shown in FIG. 1, description thereof is omitted. Also in this apparatus, a circulation circuit 53 including a tank (buffer tank) 20 and gas purification units 21A and 21B is configured, and the purified gas stored in the tank 20 is supplied to the sample preparation chamber.
- a circulation circuit 53 including a tank (buffer tank) 20 and gas purification units 21A and 21B is configured, and the purified gas stored in the tank 20 is supplied to the sample preparation chamber.
- the circulation circuit 53 includes a purification circuit unit 54 having gas purification units 21A and 21B, a first connection pipe 55 that connects the downstream side of the purification circuit unit 53 and the tank 20, and an upstream side of the purification circuit unit 53. And a second connecting pipe 56 for connecting the tank 20 and the tank 20.
- the purification circuit unit 54 includes the pair of gas purification units 21A and 21B arranged in parallel, the merging pipes 57 and 58 connecting the downstream sides of the gas purification units 21A and 21B, and the gas purification unit 21A. And branch pipes 59 and 60 that connect the upstream side of 21B.
- the merging pipes 57 and 58 and the branch pipes 59 and 60 are provided with switching valves 61, 62, 63 and 64 respectively.
- a flow rate adjustment valve 65, a pump (for example, a diaphragm pump) 66, and a switching valve 75 are interposed in the first connection pipe 55.
- Switching valves 67 and 68 are interposed in the second connecting pipe 56.
- a gas inflow pipe 69 having a switching valve 74 is connected to the junction of the branch pipes 59 and 60, and the second connecting pipe 56 is connected to the gas inflow pipe 69 on the downstream side of the switching valve 74.
- a gas outflow pipe 70 is connected to the second connection pipe 56.
- a switching valve 71, a REG 72, and an MFC 73 are interposed.
- the gas outflow pipe 70 is connected to the second connection pipe 56 on the upstream side of the switching valve 67.
- the raw material gas is stored in the tank 20. That is, the switching valves 61, 62, 63, and 64 of the purification circuit section 54 are opened, the switching valves 67 and 68 of the second connection pipe 56 are closed, and the switching valve 71 of the gas outflow pipe 70 is further closed. Is closed.
- the source gas that has entered the gas inflow pipe 69 flows to the purification circuit section 54, the first connection pipe 55, and the tank 20, and the tank 20 is filled with the source gas. Then the gas inflow piping The switching valve 74 of 69 is closed, and the switching valves 67 and 68 of the second connecting pipe 56 are opened. As a result, the gas circulates in the circulation circuit 53 composed of the tank 20, the second connection pipe 56, the purification circuit section 54, and the first connection pipe 55.
- the gas whose oxygen partial pressure is controlled in the range of 0.2 to 10_3 atm can be purified, and the gas filled in the tank 20 is purified.
- the purified gas in the tank 20 can be supplied to the sample preparation chamber. That is, the switching valve 75 of the first connecting pipe 55 is closed, the switching valves 67 and 68 of the second connecting pipe 56 are closed, and the switching valve 71 of the gas outflow pipe 70 is opened.
- the purified gas can flow into the tank 20 and the gas outflow pipe 70, and the purified gas can be supplied to the sample preparation chamber via the REG72 and MFC73.
- the purification circuit section 54 includes a pair of gas purification sections 21A and 21B, one of the two may purify the gas. That is, when the gas is purified by the first gas purification unit 21A and the gas is not purified by the second gas purification unit 21B, the switching valves 62 and 64 may be closed. Conversely, when the gas is purified by the second gas purification unit 21B and the gas is not purified by the first gas purification unit 21A, the switching valves 61 and 63 may be closed.
- the switching valve 62, 62, 63, 64, or the like constitutes the third switching means 76 that switches between allowing and stopping the supply of purified gas to the tank of each gas purification unit force.
- the third switching means 76 By switching the third switching means 76, the gas can be circulated to any gas purification unit among the plurality of gas purification units.
- the gas purification capacity can be increased, and the purified gas can be stably supplied to other apparatuses. For this reason, it is possible to sufficiently cope with an apparatus that requires a large amount of purified gas, and the use of supplying gas is not limited.
- a plurality of tanks 20 and a plurality of gases are omitted. It may be provided with a purification unit 21. As described above, if the plurality of tanks 20 and the plurality of gas purification units 21 are provided, the function and effect of the apparatus shown in FIG. 1 and the function and effect shown in FIG. 8 can be exhibited.
- the system can be operated according to the amount of gas used in other equipment to be supplied, and can be operated with high efficiency. In other equipment, purified gas is stably supplied, and high-quality samples, etc. Can be created.
- the oxygen partial pressure control apparatus shown in FIG. 8 The number of tanks may be one or three or more.
- purified gas can be supplied from two or more tanks to the sample preparation room, etc., or purified gas can be stored in two or more tanks.
- Various operations can be selected according to usage.
- the oxygen sensor 15A on the upstream side of the force upstream of the oxygen sensors 15A and 15B arranged on the upstream side and the downstream side of the oxygen pump 14 may be omitted. That is, it is only necessary to inspect the oxygen partial pressure of the gas purified by the oxygen pump 14 and control the purified gas to a desired partial pressure, so that the oxygen sensor 15B on the downstream side alone can sufficiently control the partial pressure. It is the power that can be controlled.
- the used purified gas exhausted from the sample preparation chamber is gas purified. It may be returned to the part 21 for reuse. If all of the inert gas supplied to the sample preparation room is renewed and covered with supply gas, the load on the oxygen pump 14 will increase, and the installation space will be increased just by making the equipment larger and expensive. In addition, the cost for controlling the oxygen partial pressure to a predetermined value increases.
- the used purified gas discharged from the sample preparation chamber is naturally higher in oxygen partial pressure than the purified gas supplied to the sample preparation chamber after the oxygen partial pressure is controlled by the oxygen pump 14.
- the oxygen partial pressure is much lower. Therefore, if a return pipe is provided and the used purified gas exhausted from the sample preparation chamber is returned to the gas purification unit 21 for reuse, a new raw material can be used.
- the load of the oxygen pump 14 can be reduced as much as the amount of supply gas can be reduced, and the size and cost can be reduced, and the installation space is also small.
- the cost for controlling the oxygen partial pressure to a predetermined value can be reduced.
- a die bonder is a device that bonds a die (a chip of a silicon substrate on which an electronic circuit is built) to a lead frame, a substrate, or the like using solder, gold plating, or resin as a bonding material.
- the solder fixed amount dispensing device is a dispenser that discharges a liquid material (solder) that bonds and joins electrical components, electronic components, precision components, and the like.
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Electrochemistry (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/517,615 US8070852B2 (en) | 2006-12-05 | 2006-12-05 | Oxygen partial-pressure control unit and method of gas supply |
EP06833993A EP2090545A4 (en) | 2006-12-05 | 2006-12-05 | UNIT FOR THE CONTROL OF OXYGEN PARTICULAR PRESSURE AND GAS SUPPLY METHOD |
JP2007507588A JP4285663B2 (ja) | 2006-12-05 | 2006-12-05 | 酸素分圧制御装置及びガス供給方法 |
PCT/JP2006/324238 WO2008068844A1 (ja) | 2006-12-05 | 2006-12-05 | 酸素分圧制御装置及びガス供給方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2006/324238 WO2008068844A1 (ja) | 2006-12-05 | 2006-12-05 | 酸素分圧制御装置及びガス供給方法 |
Publications (1)
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WO2008068844A1 true WO2008068844A1 (ja) | 2008-06-12 |
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PCT/JP2006/324238 WO2008068844A1 (ja) | 2006-12-05 | 2006-12-05 | 酸素分圧制御装置及びガス供給方法 |
Country Status (4)
Country | Link |
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US (1) | US8070852B2 (ja) |
EP (1) | EP2090545A4 (ja) |
JP (1) | JP4285663B2 (ja) |
WO (1) | WO2008068844A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012106873A (ja) * | 2010-11-15 | 2012-06-07 | Canon Machinery Inc | 酸素分圧制御方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4970013B2 (ja) * | 2006-12-05 | 2012-07-04 | キヤノンマシナリー株式会社 | 酸素分圧制御装置 |
AU2017263002B2 (en) | 2016-05-13 | 2019-08-29 | Lynntech, Inc. | Hypoxia training device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002326887A (ja) | 2001-04-27 | 2002-11-12 | Nec Machinery Corp | 酸素分圧制御による試料作成方法および試料作成装置 |
JP2004250283A (ja) * | 2003-02-20 | 2004-09-09 | National Institute Of Advanced Industrial & Technology | 酸素分圧制御による試料作成方法および試料作成装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6955198B2 (en) * | 2003-09-09 | 2005-10-18 | Advanced Technology Materials, Inc. | Auto-switching system for switch-over of gas storage and dispensing vessels in a multi-vessel array |
JP4621888B2 (ja) * | 2005-02-02 | 2011-01-26 | 独立行政法人産業技術総合研究所 | 半導体装置の製造方法 |
DE102007001417B4 (de) * | 2007-01-09 | 2009-11-12 | Ford Global Technologies, LLC, Dearborn | Vorrichtung zur Abschätzung des Beladungszustandes eines NOx-Speicherkatalysators |
-
2006
- 2006-12-05 WO PCT/JP2006/324238 patent/WO2008068844A1/ja active Application Filing
- 2006-12-05 EP EP06833993A patent/EP2090545A4/en not_active Withdrawn
- 2006-12-05 US US12/517,615 patent/US8070852B2/en not_active Expired - Fee Related
- 2006-12-05 JP JP2007507588A patent/JP4285663B2/ja active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002326887A (ja) | 2001-04-27 | 2002-11-12 | Nec Machinery Corp | 酸素分圧制御による試料作成方法および試料作成装置 |
JP2004250283A (ja) * | 2003-02-20 | 2004-09-09 | National Institute Of Advanced Industrial & Technology | 酸素分圧制御による試料作成方法および試料作成装置 |
Non-Patent Citations (1)
Title |
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See also references of EP2090545A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012106873A (ja) * | 2010-11-15 | 2012-06-07 | Canon Machinery Inc | 酸素分圧制御方法 |
Also Published As
Publication number | Publication date |
---|---|
JP4285663B2 (ja) | 2009-06-24 |
EP2090545A1 (en) | 2009-08-19 |
US20100065440A1 (en) | 2010-03-18 |
EP2090545A4 (en) | 2012-03-21 |
JPWO2008068844A1 (ja) | 2010-03-11 |
US8070852B2 (en) | 2011-12-06 |
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