WO2017022330A1 - パージ装置、パージストッカ、及びパージガスの供給方法 - Google Patents
パージ装置、パージストッカ、及びパージガスの供給方法 Download PDFInfo
- Publication number
- WO2017022330A1 WO2017022330A1 PCT/JP2016/067203 JP2016067203W WO2017022330A1 WO 2017022330 A1 WO2017022330 A1 WO 2017022330A1 JP 2016067203 W JP2016067203 W JP 2016067203W WO 2017022330 A1 WO2017022330 A1 WO 2017022330A1
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- WIPO (PCT)
- Prior art keywords
- container
- purge
- purge gas
- control device
- placement
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
- B08B5/023—Cleaning travelling work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/0821—Handling or manipulating containers, e.g. moving or rotating containers in cleaning devices, conveying to or from cleaning devices
- B08B9/0826—Handling or manipulating containers, e.g. moving or rotating containers in cleaning devices, conveying to or from cleaning devices the containers being brought to the cleaning device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/20—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought
- B08B9/28—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought the apparatus cleaning by splash, spray, or jet application, with or without soaking
- B08B9/283—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought the apparatus cleaning by splash, spray, or jet application, with or without soaking by gas jets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/20—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought
- B08B9/28—Cleaning containers, e.g. tanks by using apparatus into or on to which containers, e.g. bottles, jars, cans are brought the apparatus cleaning by splash, spray, or jet application, with or without soaking
- B08B9/34—Arrangements of conduits or nozzles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K21/00—Fluid-delivery valves, e.g. self-closing valves
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/673—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere using specially adapted carriers or holders; Fixing the workpieces on such carriers or holders
- H01L21/6735—Closed carriers
- H01L21/67389—Closed carriers characterised by atmosphere control
- H01L21/67393—Closed carriers characterised by atmosphere control characterised by the presence of atmosphere modifying elements inside or attached to the closed carrierl
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
- H01L21/67763—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations the wafers being stored in a carrier, involving loading and unloading
- H01L21/67769—Storage means
Definitions
- the present invention relates to a purge apparatus, a purge stocker, and a method of supplying a purge gas.
- Containers such as FOUPs, SMIF Pods, and reticle Pods that contain wafers and reticles are filled with a purge gas such as clean dry air or nitrogen gas in the container by the purge device during storage to suppress contamination or oxidation of the contents.
- a purge gas such as clean dry air or nitrogen gas in the container by the purge device during storage to suppress contamination or oxidation of the contents.
- This purge device is known to be provided in a purge stocker for storing containers.
- a purge abnormality occurs, such as a shortage of purge gas supply by the purge device, contamination of the contents occurs, so a technology has been proposed to measure the flow rate of the purge gas supplied to the container and detect the purge abnormality. (See, for example, Patent Document 1).
- the flow volume and pressure of purge gas supplied to the inside of the container mounted in the mounting part are measured by a sensor, and it is judged whether the favorable purge is performed.
- the flow rate of the purge gas to each container is adjusted by arranging a solenoid valve and a flow control device for each mounting portion.
- the present invention has an object to provide a purge apparatus, a purge stocker, and a method of supplying a purge gas, which can be made compact by simplifying the configuration.
- the purge apparatus is formed such that a plurality of grouped mounting portions on which the container is mounted and the flow path for supplying the purge gas to the container are opened by mounting the container on the mounting portion. And a flow control device for adjusting the flow rate of purge gas supplied into the group based on the number of containers in the group.
- each of the placement units may have a detection unit that detects whether or not the container is placed.
- the nozzle has a lid that closes the flow path by the pressure of the purge gas in a state where the container is not mounted on the mounting unit, and the lid has a weight of the container when the container is mounted on the mounting unit
- the channel may be opened by
- the flow control device may decrease the flow rate of the purge gas once and then gradually increase it to a predetermined flow rate.
- a plurality of placement units arranged in the horizontal direction or the vertical direction may be set as a group.
- the purge stocker according to the present invention comprises a plurality of the above purge devices.
- the apparatus is provided with a transport device which can travel along a plurality of placement parts of the purge device and transfers the container to the placement portion, and the flow rate control device of the purge device It may be arranged collectively on the side.
- a method of supplying a purge gas according to the present invention is a method of supplying a purge gas to a container placed on a plurality of grouped placing parts, and the container is placed on the placing part and the container is placed. Opening the flow path for supplying the purge gas, and adjusting the flow rate of the purge gas supplied into the group based on the number of containers in the group.
- the purge gas flows in the flow path of the mounting portion on which the container is mounted, but the purge gas does not flow in the flow path of the mounting portion on which the container is not mounted . Therefore, the flow rate of the purge gas supplied to each container is adjusted by adjusting the flow rate of the purge gas based on the number of containers in the group. As a result, it is not necessary to provide a solenoid valve or a flow control device for each mounting portion, and space saving can be achieved by simplifying the configuration as a whole, and the purge device can be made compact.
- each of the placement units has a detection unit that detects whether or not a container is placed
- the number of containers in the group can be detected more reliably.
- the nozzle has a lid that closes the flow path by the pressure of the purge gas in a state where the container is not placed on the placement portion, and the lid flows by the weight of the container when the container is placed on the placement portion
- the opening and closing of the passage can be reliably performed by the lid.
- the flow control device reduces the flow rate of the purge gas once and then gradually increases the flow rate to a predetermined flow rate when a new container is placed in the group, a large amount of sudden change occurs in the newly placed container.
- the flow control device may be provided for each of the plurality of mounting portions arranged in the horizontal direction or the vertical direction. It is possible to
- the purge stocker since a plurality of purge devices capable of saving space can be provided, the depth dimension of each mounting portion can be reduced, and a compact purge stocker can be achieved.
- the flow control device of the purge device is an end portion of the travel range of the conveyance device. Since the flow control devices are collectively arranged in a part of the purge stocker in the devices arranged collectively, it is easy for the operator to install or maintain the flow control device while compacting the purge stocker. be able to.
- the purge gas supply method of the present invention when the container is placed on the placement unit, the purge gas flows in the flow path of the placement unit on which the container is placed, but the placement unit on which the container is not placed The purge gas does not flow in the flow path of Therefore, by adjusting the flow rate of the purge gas based on the number of containers in the group, it is possible to appropriately adjust the flow rate of the purge gas supplied to each container. As a result, it is not necessary to provide a solenoid valve or a flow control device for each mounting portion, and control of each solenoid valve and each flow control device is unnecessary, and control in supply of purge gas can be facilitated.
- FIG. 1 is a view showing an example of the purge stocker 1 according to the present embodiment.
- the purge stocker 1 is, for example, an automatic warehouse that stores a wafer used for manufacturing a semiconductor element, and a container F for storing an article such as a reticle.
- the container F is, for example, FOUP, SMIF Pod, reticle Pod, or the like.
- the purge stocker 1 includes a stocker casing 2 forming an outer shell, a plurality of shelf-like placement units 3 installed in the stocker casing 2, a plurality of purge devices 4, and a container A stacker crane 5 as a transfer device of F and a control device 6 are provided.
- the mounting part 3 may be called a storage shelf, for example.
- the stocker housing 2 has an internal space 2a that can be isolated from the outside.
- the stocker housing 2 is provided with a storage port (not shown) to which the container F is transferred between the outside of the stocker housing 2 and the internal space 2a.
- the plurality of placement units 3, the plurality of purge devices 4, and the stacker crane 5 are disposed in the internal space 2 a of the stocker housing 2.
- the plurality of placement units 3 may be disposed on both sides (+ Y side and -Y side) of the traveling range (X direction) of the stacker crane 5.
- the control device 6 controls the purge device 4 and the stacker crane 5.
- a control device for controlling the purge device 4 and a control device for controlling the stacker crane 5 may be separately provided.
- the stacker crane 5 can transport the container F in each of the X direction, the Y direction, and the Z direction, and, for example, between the storage port and the placement unit 3 or another placement from the placement unit 3
- the container F can be transported to the unit 3.
- the stacker crane 5 includes, for example, a traveling carriage 10, a support column 11, a support 12, and a transfer device 13.
- the traveling carriage 10 has a plurality of wheels 14 and moves in the horizontal direction (X direction) along rails 15 provided on the floor surface.
- the support column 11 is provided to extend in the vertical direction (Z direction) from the upper surface of the traveling carriage 10.
- the support 12 is supported by the support column 11 and is provided slidably along the support column 11 in the Z direction.
- the transfer device 13 includes, for example, an extendable arm portion and a hand portion on which the container F can be placed on the upper surface.
- the upper end of the support column 11 may be guided by a rail or the like laid on the ceiling or the like of the stocker casing 2.
- the transport apparatus for the container F instead of the stacker crane 5 which places and transports the container F as described above, for example, gripping the flange portion 28 (see FIG.
- the placement units 3 are arranged in a plurality of stages in the vertical direction (Z direction), and arranged in a plurality of rows in the horizontal direction (X direction).
- the containers F can be placed on the plurality of placement units 3 respectively.
- the plurality of placement units 3 are grouped. In the present embodiment, the plurality of placement units 3 aligned in the horizontal direction are set to one group G.
- FIG. 2 is a view showing an example of the container F and the purge device 4.
- FIG. 3 is a view showing a part of the inside of the purge stocker 1, and shows a state where it is placed on the placement unit 3.
- a pin 20 is provided on the top surface of the placement unit 3 and is used to position the container F.
- the container F is shown in FIG. 2 as an example of the FOUP, and includes a box-like main body 21 having an opening 21a and a lid 22 closing the opening 21a. An article such as a wafer is accommodated in the inside Fa of the container F through the opening 21a.
- the main body portion 21 includes a positioning recess 23 on the bottom surface side.
- the recess 23 is, for example, a groove extending radially from the center of the bottom surface of the main body 21.
- a pin (not shown) provided in the hand portion of the transfer device 13 enters the recess 23 and performs positioning when transporting the container F.
- a placement sensor 29 is provided on the top surface of each placement unit 3.
- the placement sensor 29 detects whether or not the container F is placed on the placement unit 3.
- the placement sensor 29 shown in FIG. 3 has a switch 29 a that protrudes upward.
- the switch 29 a is pressed by placing the container F on the placement unit 3.
- An optical sensor is provided inside the placement sensor 29.
- the light sensor receives light emitted from the light source by the light receiving unit and converts the light into an electric signal.
- the electrical signal converted by the light receiving unit is transmitted to the control device 6.
- the placement sensor 29 when the switch 29a is pressed, the light from the light source is blocked.
- the control device 6 determines that the container F has been placed for each placement unit 3 based on the electrical signal transmitted from the placement sensor 29.
- the placement sensor 29 is not limited to the above configuration, and a contact or non-contact sensor that can detect that the container F has been placed can be used.
- the placement unit 3 has a cutout (see FIG. 8 or the like) through which the hand of the transfer device 13 can pass in the vertical direction.
- the transfer device 13 transfers the container F onto the upper surface of the mounting unit 3 by moving the hand unit downward from above the mounting unit 3 through the notch. At this time, the container F is positioned with respect to the mounting unit 3 by inserting the pin 20 of the mounting unit 3 into the recess 23.
- the main body portion 21 includes a purge gas inlet 24, a check valve 25, an exhaust port 26, and a check valve 27 on the bottom side.
- the inlet 24 and the exhaust 26 communicate with the inside Fa and the outside of the main body 21 respectively.
- the check valves 25 and 27 are provided at the inlet 24 and the outlet 26 respectively.
- the purge device 4 includes a supply nozzle (nozzle) 30, an exhaust nozzle 31, and a flow control device 32. 2 and 3 conceptually show the supply nozzle 30 and the exhaust nozzle 31. As shown in FIG. The supply nozzle 30 and the exhaust nozzle 31 are provided on the upper surface of the mounting unit 3. The supply nozzle 30 and the exhaust nozzle 31 are disposed to be connected to the inlet 24 and the exhaust port 26 when the container F is placed on the placement unit 3. When the container F is placed on the placement unit 3, the inlet 24 of the container F is connected to the pipe 34 via the supply nozzle 30 and is further connected to the purge gas source 40 via the flow control device 32. The exhaust nozzle 31 is connected to a purge gas exhaust path (purge gas exhaust 41) via a pipe 35. The purge device 4 may not include the exhaust nozzle 31 and the pipe 35. In this case, the purge gas exhausted from the exhaust port 26 of the container F is exhausted into the inner space 2 a of the purge stocker 1.
- the supply nozzle 30 closes the flow path of the purge gas in a state where the container F is not mounted on the mounting unit 3, and the container F is mounted on the mounting unit 3.
- the flow path is opened by the weight of F.
- FIG. 3 shows a state in which the container F is mounted on the upper and lower mounting portions 3 to form a flow path of the purge gas, and the container F is not mounted on the middle mounting portion. And the flow path of purge gas is blocked.
- the detailed configuration of the supply nozzle 30 will be described later.
- the purge gas source 40 supplies an inert gas to the stored articles, such as nitrogen gas, as a purge gas.
- the purge gas is selected according to the article to be stored in the container F, and for example, a gas that suppresses oxidation of the article, molecular contamination and the like, a gas that reduces moisture in the container F, or the like is used.
- a gas that suppresses oxidation of the article, molecular contamination and the like, a gas that reduces moisture in the container F, or the like is used.
- nitrogen gas, clean dry air (CDA) or the like is used.
- the purge gas source 40 may be a part of the purge stocker 1 or an apparatus outside the purge stocker 1. For example, equipment in a factory where the purge stocker 1 is disposed may be used. .
- the pressure regulator on the purge stocker 1 side temporarily receives the purge gas from the purge gas source 40, and the pressure regulator or the like sends the purge gas to each flow rate controller 32. It may be supplied.
- the purge gas from the purge gas source 40 is supplied from the inlet 24 of the container F to the inside Fa via the flow control device 32 and the pipe 34 and is filled in the inside Fa of the container F.
- the pipe 34 branches in the middle of the flow path, and supplies the purge gas to the supply nozzle 30 in the group G. Further, the gas in the inside Fa of the container F is discharged from the exhaust port 26 to the outside of the container F, and is exhausted to the outside by the purge gas exhaust 41 via the pipe 35.
- the purge gas exhaust 41 may be provided with a device for sucking the gas by a pump or the like.
- the flow rate control device 32 is, for example, a mass flow controller, and controls the flow rate of the purge gas supplied from the purge gas source 40 to the supply nozzle 30 by controlling the flow rate of the purge gas in the pipe 34.
- the flow control device 32 is provided in communication with the control device 6.
- the flow control device 32 receives from the control device 6 a flow rate setting signal in which the set value of the flow rate is determined, and controls the flow rate of the purge gas to approach the set value.
- the setting value is set based on the number of containers F in the group G.
- the control device 6 determines the number of containers F in the group G based on the signal from the placement sensor 29 described above, and outputs a flow rate setting signal according to the number to the flow control device 32.
- the control device 6 determines the number of containers F in the group G based on, for example, the information of the containers F transferred by the stacker crane 5 instead of the signal from the placement sensor 29, and controls the flow rate control device 32. It may be output to In this case, since the placement sensor 29 is not required for the placement unit 3, the manufacturing cost can be reduced. Further, instead of receiving the flow rate setting signal from the control device 6, the flow rate control device 32 receives information on the number of containers F in the group G, and the number of containers F in the control circuit in the flow rate control device 32 or the like. The set value may be calculated based on
- the flow control device 32 adjusts the flow rate of the purge gas supplied into the group G based on the number of containers F in the group G.
- the flow rate of the purge gas can be set to a value proportional to the number of containers F, but is not limited thereto.
- the flow control device 32 is connected to the supply nozzles 30 of the plurality of placement units 3 disposed in the group G. In the group G, the purge gas flows in the flow path of the mounting unit 3 on which the container F is mounted, but the purge gas does not flow in the flow path of the mounting unit 3 on which the container F is not mounted. Therefore, the flow rate control device 32 can adjust the flow rate of the purge gas supplied to each container F by adjusting the flow rate of the purge gas based on the number of containers F in the group G.
- the flow control device 32 receives various operation commands (commands) from the control device 6 and performs various operations. For example, when the flow control device 32 receives an operation command for obtaining outputs of various signals, the flow control device 32 outputs an output signal to the control device 6 as a response to the operation command.
- the input unit 7 is, for example, an operation panel, a touch panel, a keyboard, a mouse, a trackball, or the like.
- the input unit 7 detects an input from the operator and supplies the input information to the control device 6.
- the operator can set or change the flow rate of the purge gas or the like by operating the input unit 7.
- the display unit 8 is, for example, a liquid crystal display, and displays an image supplied from the control device 6.
- the control device 6 causes the display unit 8 to display an operation status of the purge stocker 1, various settings, an image indicating a purge status, and the like.
- a pressure detection unit 37 may be connected to the downstream side of the flow control device 32 in the pipe 34.
- the pressure detection unit 37 monitors the pressure of the purge gas flowing through the pipe 34 via the flow control device 32 and detects the state of the purge in the container F.
- the pressure detection unit 37 outputs the measurement result (measurement value) to the control device 6 by wire or wirelessly.
- the control device 6 may determine the purge state by, for example, comparing the measurement result of the pressure detection unit 37 with a predetermined value (threshold value).
- the measurement value of the pressure detection unit 37 is substantially constant when the purge gas is properly supplied, but becomes larger or smaller than a predetermined range when an abnormality occurs in the container F or the purge device 4. Thereby, it is possible to confirm the abnormality of the purge for the container F.
- the pressure detection unit 37 may be connected to the pipe 35 on the exhaust side, or may be disposed on both of the pipes 34 and 35.
- the control device 6 may determine, for example, when and with which purge device 4 there is a purge failure result as a result of the determination of whether the container F is purged or not, and the determination result may be displayed on the display unit What is displayed on the screen 8 or a notification by other notification means may be used.
- FIG. 4 is a perspective view showing an example of a lid used for the supply nozzle 30.
- the lid 50 includes a first cylindrical portion 51 with a large diameter, a second cylindrical portion 52 with a small diameter, and a spacer portion 53 formed on the upper surface side of the second cylindrical portion.
- the second cylindrical portion 52 is provided substantially at the center of the upper side of the first cylindrical portion 51.
- the first cylindrical portion 51 and the second cylindrical portion 52 are integrated via the step 51 a.
- the lower portion of the first tubular portion 51 is open.
- the upper surface side of the second tubular portion 52 is closed by the ceiling portion 52a.
- the lower portion of the second tubular portion 52 is connected to the step 51a and is open.
- a plurality of spacer portions 53 are provided on the ceiling portion 52a along the peripheral portion of the ceiling portion 52a.
- the spacer portion 53 is disposed with a plurality of gaps 53a in the circumferential direction of the ceiling portion 52a.
- the upper surface of the spacer portion 53 is used as a portion in contact with the bottom of the container F.
- FIG. 5 is a view showing an example of the supply nozzle 30 provided with the lid 50 shown in FIG.
- the lid 50 is accommodated in the flow path forming portion 55 disposed in the mounting portion 3.
- the flow path forming portion 55 is formed in a cylindrical shape, and an annular member 56 is attached to the upper portion.
- the flow path forming portion 55 an end portion of the pipe 34 is connected, and a purge gas is supplied to the inside.
- the flow path forming unit 55 constitutes a flow path of the purge gas.
- a through hole 56a is formed in a substantially central portion, and a square ring 57 is provided on the upper surface side so as to surround the through hole 56a.
- the corner ring 57 is formed, for example, using an elastic member such as rubber.
- the corner ring 57 is an annular member having a rectangular cross section. The upper surface of the square ring 57 is in contact with the bottom of the container F.
- the lid portion 50 is disposed in a state where the first cylindrical portion 51 is disposed in the flow path forming portion 55 and the second cylindrical portion 52 protrudes upward from the through hole 56 a.
- a gap through which the purge gas can flow is formed between the second tubular portion 52 and the through hole 56a.
- the lid 50 is pressed upward by the pressure of the purge gas supplied from the pipe 34, and the step of the lid 50 is performed.
- the portion 51 a is pressed against the lower surface of the annular member 56.
- the through hole 56a is closed.
- the lid 50 closes the flow path by the pressure of the purge gas in a state where the container F is not placed on the placement unit 3.
- elastic members such as a coil spring, may be arranged, for example.
- the lid 50 moves downward by the weight of the container F, and the bottom surface of the container F contacts the square ring 57. Do. Thereby, the area surrounded by the corner ring 57 is sealed. Further, in the lid portion 50, the spacer portion 53 is pushed by the bottom portion of the container F to move downward, and the step portion 51a is separated from the lower surface of the annular member 56. Thus, a gap is formed between the step 51 a and the lower surface of the annular member 56.
- the purge gas in the flow path forming portion 55 is in a region surrounded by the angular ring 57 through the gap between the second cylindrical portion 52 and the through hole 56a from the gap between the step 51a and the annular member 56. It enters and is communicated with the inlet 24 of the container F via the gap 53 a of the spacer portion 53.
- the lid 50 opens the flow path of the purge gas by the weight of the container F when the container F is mounted on the mounting unit 3.
- the purge gas supplied from the pipe 34 is supplied to the inside of the container F from the inlet 24 through the flow path.
- the lid 50 moves upward by the pressure of the purge gas from the pipe 34, and the step 51a contacts the lower surface of the annular member 56. It returns to the state which obstruct
- FIG. 6 is a perspective view showing an example of a lid 50A according to a modification.
- the lid 50 ⁇ / b> A includes a large diameter attachment portion 61, a small diameter container support portion 62, an annular deformation portion 63, and a collar portion 64.
- the attachment portion 61 is formed in a cylindrical shape, and is attached to a flow path forming portion 65 described later.
- the container support portion 62 is formed in a cylindrical shape, and is formed on the deformation portion 63 extending inward from the upper portion of the attachment portion 61.
- the upper end of the container support portion 62 is used as a portion in contact with the bottom surface of the container F.
- the collar portion 64 is formed in an annular shape so as to protrude inward inside the container support portion 62.
- the lid 50A is integrally formed using an elastic member such as rubber, and at least the deformation portion 63 is formed so as to be deformable.
- FIGS. 7A and 7B are views showing an example of the supply nozzle 30 provided with the lid 50A.
- the projecting portion 61a formed on the inner lower end of the mounting portion 61 enters the annular groove 65d formed on the upper outer periphery of the flow path forming portion 65.
- Attached to the flow path forming portion 65 the pipe 34 is connected to the inside, and a disc-shaped closed portion 65b is provided at the top of the column portion 65c which stands from substantially the center of the bottom portion.
- the closed portion 65b is formed to have an outer diameter that can be disposed in the container support portion 62 of the lid 50A.
- the lid 50A is pressed upward by the pressure of the purge gas supplied from the piping 34, and the upper surface of the flange 64 Is pressed against the lower surface of the closed portion 65b. Further, the protruding portion 61a of the mounting portion 61 enters the annular groove portion 65d, whereby the flow path of the purge gas to the container F is blocked. Thus, the lid 50A blocks the flow path by the pressure of the purge gas in a state where the container F is not placed on the placement unit 3.
- An elastic member such as a coil spring may be disposed to press the lid 50A upward.
- the container support 62 abuts on the bottom of the container F and is pressed downward by the weight of the container F.
- the deforming portion 63 is deformed in a state in which the container support portion 62 has moved downward.
- the upper surface of the collar portion 64 is separated from the lower surface of the closing portion 65b.
- the purge gas in the flow path forming portion 65 forms a flow path that reaches the inlet 24 from the gap between the flange portion 64 and the closing portion 65 b via the container support portion 62.
- the lower surface of the deformation portion 63 is in contact with the upper end of the inner wall 65a of the flow path forming portion 65, thereby preventing the purge gas from leaking to the outside.
- the lid 50A opens the flow path by the weight of the container F when the container F is placed on the placement unit 3.
- the purge gas supplied from the pipe 34 flows along the open flow path, and is supplied to the inside of the container F from the inlet 24.
- the lid 50A When the container F placed on the placement unit 3 moves upward, the lid 50A returns to its original form by the pressure of the purge gas from the pipe 34 and its own elastic force, and the hook 64 is closed. By contacting 65 b, the purge gas flow path is returned to the closed state.
- FIG. 8 is a view showing an example of the arrangement of the flow control device 32.
- one flow control device 32 is provided for each group G of the placement unit 3.
- the flow rate control device 32 is collectively arranged, for example, on the end 5E side of the travel range of the stacker crane 5 in the purge stocker 1.
- the flow control device 32 is provided for each row.
- one flow control device 32 may be disposed with the two rows of mounting units 3 sandwiching the stacker crane 5 as one group G.
- the flow control devices 32 are collectively arranged on the end 5E side of the traveling range of the stacker crane 5, it becomes unnecessary to arrange the flow control devices 32 at the back of the mounting portion 3. Furthermore, since the solenoid valve for each placement unit 3 is not necessary, the depth dimension of the placement unit can be reduced, and the purge stocker 1 can be miniaturized. In addition, since the flow control device 32 is collectively arranged in part of the purge stocker, the operator can easily install the flow control device 32, perform maintenance, and the like.
- FIG. 9 is a flowchart showing an example of a method of supplying a purge gas according to the present embodiment.
- the supply nozzle 30 opens the flow path of the purge gas (step S1). Thereby, the supply of the purge gas by the purge device 4 to the container F placed on the placement unit 3 is started.
- a signal indicating that the container F has been placed from the placement sensor 29 is transmitted to the control device 6.
- the control device 6 acquires the number of containers F of the group G based on this signal (step S2).
- the control device 6 may acquire the number of containers F in the group G from the control device or the like of the purge stocker 1.
- the control device 6 sets the flow rate of the purge gas based on the number of containers F in the group G, and transmits the set value to the flow control device 32.
- the flow rate control device 32 controls the flow rate of the purge gas based on the set value from the control device 6 (step S3).
- the control device 6 determines whether a new container F has been placed in the group G (step S4).
- the placement of the new container F may be based on the signal of the placement sensor 29 or may be information sent from the control device or the like of the purge stocker 1.
- the control device 6 instructs the flow rate control device 32 to once decrease the flow rate of the purge gas and gradually increase the flow rate to a predetermined flow rate (step S5).
- the control device 6 instructs the flow rate control device 32 to once decrease the flow rate of the purge gas and gradually increase the flow rate to a predetermined flow rate (step S5).
- the control device 6 determines the quality of the purge based on the detection signal of the pressure detection unit 37 (step S6).
- the control device 6 causes the display unit 8 to display the determination result (step S5), and ends the series of processing.
- the purge quality determination in step S6 indicates that a purge failure has occurred in any of the containers F of the group G. judge.
- the pressure detection part 37 is arrange
- the flow path of the mounting unit 3 on which the container F is mounted the flow path of the mounting unit 3 on which the container F is not mounted
- the purge gas does not flow to the Therefore, by adjusting the flow rate of the purge gas based on the number of containers F in the group G, the flow rate of the purge gas supplied to each container F is adjusted.
- FIG. 10 is a view showing an example of a purge stocker 1A according to a modification.
- a plurality of placement units 3 aligned in a line in the vertical direction may be set as one group G.
- a plurality of placement units 3 arranged in two or more rows in the horizontal direction and the vertical direction may be set as one group G.
- the mounting part 3 of the group G can be set arbitrarily.
- a plurality of placement units 3 disposed apart from one another may be set as one group G.
- the configuration in which the flow rate control device 32 is collectively disposed on the end portion 5E side of the traveling range of the stacker crane 5 has been described as an example, but it is not limited thereto.
- the flow control device 32 may be disposed below the placement units 3 aligned in a line in the vertical direction, or, although not shown, aligned in a line in the vertical direction
- the flow control device 32 may be disposed above the placement unit 3.
- FIG. 11 is a view showing an example of a purge stocker 1B according to a modification.
- the flow control device 32 may be disposed on the back surface Fb side of the container F held by the placement unit 3 in the purge stocker 1B.
- the rear surface Fb side of the container F means the side opposite to the side where the transfer device 13 of the stacker crane 5 accesses.
- the wall portion of the stocker housing 2 is disposed.
- the flow rate control device 32 is disposed, for example, in the space between the mounting portion 3 and the wall portion on the back surface Fb side of the container F.
- the flow control device 32 may be disposed between two adjacent placement units 3.
- the stacker crane 5 places the container F on the placement unit 3 connected to the purge device 4 and purges the container F subjected to purge to the purge device 4. You may transfer to the mounting part 3 which is not connected.
- the contents of Japanese Patent Application No. 2015-153757, and all the documents cited in the above-described embodiments and the like are incorporated as part of the description of the text, as long as the law permits.
- F container G: group 1, 1A, 1B: purge stocker 2: stocker housing 2a: internal space 3: placement portion 3a: through hole 3b: square ring 4: purge device 5: stacker crane (transfer device) 5E: Traveling end 6 ... Control device 24 ... Introduction port 29 ... Placement sensor (detection part) 29a ... Switch 30 ... Supply nozzle (nozzle) 32 ... Flow control device 34 ... Piping 50, 50A ... Lid part
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Abstract
Description
Claims (8)
- 容器が載置されるグループ化された複数の載置部と、
前記載置部に前記容器が載置されることにより前記容器にパージガスを供給する流路が開くように形成されたノズルと、
前記グループ内の前記容器の個数に基づいて前記グループ内に供給する前記パージガスの流量を調整する流量制御装置と、を備えるパージ装置。 - 前記載置部のそれぞれは、前記容器が載置されているか否かを検出する検出部を有する、請求項1記載のパージ装置。
- 前記ノズルは、前記載置部に前記容器が載置されない状態において前記パージガスの圧力によって流路を閉塞する蓋部を有し、
前記蓋部は、前記載置部に前記容器が載置された場合に前記容器の重量によって前記流路を開放する、請求項1又は請求項2記載のパージ装置。 - 前記流量制御装置は、前記グループ内に新たな前記容器が載置された場合、前記パージガスの流量を一旦減少させてから徐々に所定流量まで増加させる、請求項1~請求項3のいずれか1項に記載のパージ装置。
- 水平方向又は鉛直方向に並んだ前記複数の載置部を前記グループとする、請求項1~請求項4のいずれか1項に記載のパージ装置。
- 請求項1~請求項5のいずれか一項に記載のパージ装置を複数備える、パージストッカ。
- 前記パージ装置の前記複数の載置部に沿って走行可能であり、前記載置部に対して前記容器を移載する搬送装置を備え、
前記パージ装置の前記流量制御装置は、前記搬送装置の走行範囲の端部側にまとめて配置される、請求項6記載のパージストッカ。 - グループ化された複数の載置部に載置された容器に対してパージガスを供給する方法であって、
前記載置部に前記容器が載置されることにより前記容器にパージガスを供給する流路を開くことと、
前記グループ内の前記容器の個数に基づいて前記グループ内に供給する前記パージガスの流量を調整することと、を含むパージガスの供給方法。
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US15/749,803 US10766056B2 (en) | 2015-08-04 | 2016-06-09 | Purge device, purge stocker, and method for feeding purge gas |
JP2017532414A JP6468358B2 (ja) | 2015-08-04 | 2016-06-09 | パージストッカ、及びパージストッカにおけるパージガスの供給方法 |
CN201680045256.1A CN107851596A (zh) | 2015-08-04 | 2016-06-09 | 净化装置、净化储料器以及净化气体的供给方法 |
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JP (1) | JP6468358B2 (ja) |
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KR20180028971A (ko) * | 2016-09-09 | 2018-03-19 | 가부시키가이샤 다이후쿠 | 용기 수납 설비 |
WO2018150698A1 (ja) * | 2017-02-20 | 2018-08-23 | 村田機械株式会社 | パージストッカ |
JP2018167941A (ja) * | 2017-03-29 | 2018-11-01 | 株式会社ダイフク | 収納棚 |
CN112262465A (zh) * | 2018-06-15 | 2021-01-22 | 村田机械株式会社 | 保管架 |
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JP6817757B2 (ja) * | 2016-09-16 | 2021-01-20 | 東京エレクトロン株式会社 | 基板処理装置及び基板移送方法 |
JP7090513B2 (ja) * | 2018-09-06 | 2022-06-24 | 東京エレクトロン株式会社 | 基板処理装置及びパージ方法 |
CN117402277B (zh) * | 2023-12-15 | 2024-04-09 | 万华化学集团股份有限公司 | 一种淤浆法生产超高分子量聚乙烯出料线防堵塞的工艺方法 |
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US20180229277A1 (en) | 2018-08-16 |
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JP6468358B2 (ja) | 2019-02-13 |
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