WO2013105533A1 - 基板処理システム及び基板位置矯正方法 - Google Patents
基板処理システム及び基板位置矯正方法 Download PDFInfo
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- WO2013105533A1 WO2013105533A1 PCT/JP2013/050056 JP2013050056W WO2013105533A1 WO 2013105533 A1 WO2013105533 A1 WO 2013105533A1 JP 2013050056 W JP2013050056 W JP 2013050056W WO 2013105533 A1 WO2013105533 A1 WO 2013105533A1
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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
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67259—Position monitoring, e.g. misposition detection or presence detection
- H01L21/67265—Position monitoring, e.g. misposition detection or presence detection of substrates stored in a container, a magazine, a carrier, a boat or the like
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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
- H01L21/677—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
- H01L21/67772—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 involving removal of lid, door, cover
Definitions
- the present invention relates to a substrate processing system and a substrate position correcting method for correcting the position of a substrate accommodated in a transfer container in the substrate processing system.
- a cassette for storing a plurality of semiconductor wafers in multiple stages, or a transfer container (carrier) called a FOUP (Front Opening Unified Pod) is used.
- These carriers include a main body and an opening / closing door that is detachably provided at an opening of the main body. Grooves for supporting the semiconductor wafer are provided at predetermined intervals on the inner wall surface of the main body of the carrier so that the semiconductor wafer can be inserted therein.
- mapping In order to confirm the presence and position of semiconductor wafers accommodated in multiple stages in the carrier, a process called mapping is performed with the carrier mounted on the load port of the substrate processing system.
- an optical sensor having a light source and a light receiving unit is used for mapping.
- a sensor advancing / retracting mechanism and a sensor mounting mechanism are provided in a lifting / lowering mechanism portion of a port door for opening / closing a hoop door.
- a hoop opener provided with a member has been proposed.
- a conventional substrate processing system issues an alarm and a loader that carries in and out the semiconductor wafer by a hoop.
- the processing in the module was stopped and the operator was performing manual correction work. Since this correction work is manual, it takes time and prolongs the stoppage time of the apparatus, which causes a reduction in productivity in the entire substrate processing system.
- Patent Document 2 Japanese Patent Application Laid-Open No. 2008-311419
- Patent Document 3 Japanese Patent Laid-Open No. 11-204612
- a wafer position correcting unit that presses an end face of a semiconductor wafer accommodated in a protruding state in a cassette and corrects the position.
- Patent Documents 2 and 3 have a problem that the practicality is low because a dedicated complex mechanism must be additionally provided in the loader module for the purpose of correcting the position of the semiconductor wafer in the carrier. there were.
- the present invention provides a substrate processing system and a substrate position correcting method that can correct the positional deviation of the substrate in the carrier by a simple method and reduce the downtime of the apparatus.
- a substrate processing system includes an opening for inserting a substrate and an opening / closing door for closing the opening, and uses a transfer container that supports and accommodates a plurality of substrates in multiple stages. Carrying in and out.
- the substrate processing system of the 1st viewpoint of this invention is the following.
- the first control unit determines whether the substrate position is in a normal state or an abnormal state based on the substrate position information from the mapping device.
- an abnormal state after the closing / opening operation for opening the door after the opening / closing device is closed by the opening / closing device, the mapping device performs control so that the mapping operation is performed again.
- the first control unit may perform control so as to repeatedly perform the close / open operation and the re-mapping operation.
- the first control unit may perform the close / open operation and the operation when the substrate position detected by the second mapping operation is in a normal state.
- the mapping operation may be stopped again, and the substrate position information in the normal state obtained in the last mapping operation may be transmitted to a second control unit that is higher than the first control unit.
- the substrate processing system stops the repetition and repeats the final mapping when the number of repetitions of the close / open operation and the re-mapping operation reaches a set number. You may transmit the said board
- the substrate position correcting method of the present invention is An opening for inserting a substrate and an opening / closing door for closing the opening, and a mounting portion on which a transport container for supporting and accommodating a plurality of substrates in multiple stages is mounted; An opening and closing device that performs an opening and closing operation by holding the opening and closing door of the transport container mounted on the placement unit; A mapping device that performs a mapping operation in a state where the open / close door is opened, detects a substrate position accommodated in the transfer container, and acquires the substrate position information; A control unit for controlling the switchgear and the mapping device; And a substrate position correction method for correcting the position of the substrate accommodated in the transfer container in a substrate processing system that carries in and out the substrate using the transfer container.
- the substrate position correction method of the present invention comprises: Performing a mapping operation by the mapping device; When the mapping operation detects that the substrate position is in an abnormal state, performing a close / open operation of opening the door after closing the door; Performing a second mapping operation by the mapping device; It is characterized by having.
- the step of performing the closing / opening operation and the step of performing the re-mapping operation may be repeated.
- the control unit performs the close / open operation step and the re-mapping operation when the substrate position detected by the re-mapping operation is in a normal state.
- the repetition with the step may be stopped.
- the repetition may be stopped when the number of repetitions of the step of performing the close / open operation and the step of performing the mapping operation again reaches a set number.
- a substrate processing system includes an opening for inserting a substrate and an opening / closing door for closing the opening, and uses a transfer container that supports and accommodates a plurality of substrates in multiple stages. Carrying in and out.
- the substrate processing system performs an opening / closing operation by holding the mounting portion on which the transport container is mounted and the opening / closing door of the transport container mounted on the mounting portion.
- control unit is configured to determine whether the substrate position is in a normal state or an abnormal state based on the substrate position information from the mapping device.
- An open / close control unit that performs a close / open operation for opening the open / close device after the open / close device is closed by the open / close device when the determination result in the determination unit is abnormal; and when the close / open operation is performed.
- a mapping operation control unit that controls the mapping device to perform another mapping operation.
- the abnormal state of the substrate in the transfer container can be quickly detected by using the opening / closing door of the transfer container without providing a special mechanism and without manual operation. Can be corrected. Therefore, it is possible to shorten the downtime of the apparatus as much as possible, and to prevent a reduction in production efficiency.
- FIG. 1 is a plan view showing a schematic configuration of a substrate processing system according to a first embodiment of the present invention.
- FIG. 1 is a cross-sectional view taken along line IIA-IIA in FIG. It is a top view of the fork with which it uses for description of a mapping sensor.
- It is drawing which shows the example of a whole structure of the control part of the substrate processing system of FIG.
- It is drawing which shows the structural example of the 1st control part in the substrate processing system of FIG.
- It is a flowchart which shows an example of the procedure of control including the board
- FIG. 1 is a plan view showing a schematic configuration of a substrate processing system according to the present embodiment.
- the substrate processing system 1 according to the present embodiment includes, for example, a film formation process, a diffusion process, a semiconductor process (hereinafter referred to as a “wafer”) W for semiconductor device manufacturing with a plurality of continuous operations. It is an apparatus that performs a predetermined process such as an etching process.
- the substrate processing system 1 includes a plurality of process modules that perform predetermined processing on the wafer W.
- the substrate processing system 1 includes four process modules 10A, 10B, 10C, and 10D.
- Each of the process modules 10A, 10B, 10C, and 10D is configured to maintain its internal space in a predetermined reduced pressure atmosphere (vacuum state).
- the substrate processing system 1 further includes a first transfer chamber 11 and two load lock chambers 12A and 12B.
- the first transfer chamber 11 has six side surfaces.
- the process modules 10 ⁇ / b> A, 10 ⁇ / b> B, 10 ⁇ / b> C, 10 ⁇ / b> D and the load lock chambers 12 ⁇ / b> A, 12 ⁇ / b> B are arranged adjacent to the respective side surfaces of the first transfer chamber 11. In the example shown in FIG.
- the process modules 10 ⁇ / b> A, 10 ⁇ / b> B, 10 ⁇ / b> C, 10 ⁇ / b> D and the load lock chambers 12 ⁇ / b> A, 12 ⁇ / b> B and the process modules 10 ⁇ / b> A, 10 ⁇ / b> B, 10 ⁇ / b> C, 10 ⁇ / b> D and the load lock chamber are surrounded by the first transfer chamber 11. They are arranged in the order of 12B and 12A in the clockwise direction in FIG.
- the first transfer chamber 11 is configured so that it can be maintained in a predetermined reduced-pressure atmosphere, like the processing chambers of the process modules 10A, 10B, 10C, and 10D.
- the load lock chambers 12A and 12B are configured so that the internal space can be switched between an atmospheric pressure state and a vacuum state.
- a substrate mounting table 13A on which the wafer W is mounted is provided in the load lock chamber 12A.
- a substrate mounting table 13B on which the wafer W is mounted is provided in the load lock chamber 12B.
- the substrate processing system 1 further includes gate valves G1A, G1B, G1C, G1D, G2A, and G2B.
- the gate valve G1A is disposed between the first transfer chamber 11 and the processing chamber of the process module 10A.
- the gate valve G1B is disposed between the first transfer chamber 11 and the processing chamber of the process module 10B.
- the gate valve G1C is disposed between the first transfer chamber 11 and the processing chamber of the process module 10C.
- the gate valve G1D is disposed between the first transfer chamber 11 and the processing chamber of the process module 10D.
- the gate valve G2A is disposed between the first transfer chamber 11 and the load lock chamber 12A.
- the gate valve G2B is disposed between the first transfer chamber 11 and the load lock chamber 12B.
- Each of the gate valves G1A to G1D, G2A, and G2B has a function of opening and closing an opening provided in a wall that partitions two adjacent spaces.
- the gate valves G1A to G1D hermetically seal the process chambers of the process modules 10A, 10B, 10C, and 10D in the closed state, and the wafer W between the process chambers and the first transfer chamber 11 in the open state. Enable transfer.
- the gate valves G2A and G2B maintain the airtightness of the first transfer chamber 11 in the closed state, and can transfer the wafer W between the first transfer chamber 11 and the load lock chambers 12A and 12B in the open state.
- the substrate processing system 1 further includes a loader module 20 that loads the wafer W into the substrate processing system 1 and unloads the wafer W from the substrate processing system.
- the loader module 20 includes a second transfer chamber 14, an orienter 15 that is a device for aligning the wafer W, and a plurality of load ports 18A, 18B, and 18C.
- the second transfer chamber 14 has a rectangular shape with a horizontal section that is long in one direction (left and right direction in FIG. 1), and the load lock chambers 12 ⁇ / b> A and 12 ⁇ / b> B are sandwiched between the second transfer chamber 14 and the first transfer chamber 11. Has been placed.
- One side surface of the second transfer chamber 14 is adjacent to the load lock chambers 12A and 12B.
- the second transfer chamber 14 has a circulation facility for supplying, for example, nitrogen gas or clean air to the internal space by downflow.
- the orienter 15 is connected to one end of the second transfer chamber 14 in the longitudinal direction.
- the orienter 15 includes a rotating plate 16 that is rotated by a drive motor (not shown), and an optical sensor 17 that is provided at an outer peripheral position of the rotating plate 16 and detects a peripheral portion of the wafer W.
- the substrate processing system 1 includes three load ports 18A, 18B, and 18C.
- the load ports 18A, 18B, and 18C are disposed adjacent to the opening 14a of the second transfer chamber 14 on the side opposite to the side surface adjacent to the load lock chambers 12A and 12B.
- the load ports 18A, 18B, and 18C can each be loaded with a FOUP 19 that is a transfer container for the wafer W.
- FOUP 19 is a transfer container for the wafer W.
- the wafers W can be arranged in multiple stages at intervals in the vertical direction.
- the substrate processing system 1 further includes gate valves G3A and G3B.
- the gate valve G3A is disposed between the load lock chamber 12A and the second transfer chamber 14.
- the gate valve G3B is disposed between the load lock chamber 12B and the second transfer chamber 14.
- Each of the gate valves G3A and G3B has a function of opening and closing an opening provided in a wall that partitions two adjacent spaces.
- the gate valves G3A and G3B maintain the airtightness of the load lock chambers 12A and 12B in the closed state, and can transfer the wafer W between the load lock chambers 12A and 12B and the second transfer chamber 14 in the open state.
- the substrate processing system 1 further includes a first transfer device 21 disposed in the first transfer chamber 11 and a second transfer device 25 disposed in the second transfer chamber 14.
- the first transfer device 21 is a device for transferring the wafer W between the process chambers of the process modules 10A, 10B, 10C, and 10D and the load lock chambers 12A and 12B.
- the second transfer device 25 is a device for transferring the wafer W between the hoops 19 of the load ports 18A, 18B, and 18C, the load lock chambers 12A and 12B, and the orienter 15.
- the first transfer device 21 includes a base 22, a pair of transfer arms 23a and 23b that are connected to the base 22 and arranged to face each other, and a fork 24a provided at the tip of the transfer arm 23a. And a fork 24b provided at the tip of the transfer arm 23b.
- Each of the transfer arm portions 23a and 23b is configured to be able to bend and stretch and turn around the rotation axis of the base portion 22.
- the forks 24a and 24b function as holding members that place and hold the wafer W thereon.
- the first transfer device 21 transfers the wafer W while the wafer W is placed on the forks 24a and 24b.
- the second transfer device 25 is configured to be movable along the guide rail 28 provided in the second transfer chamber 14 in the longitudinal direction of the second transfer chamber 14 (the left-right direction in FIG. 1). .
- the second transfer device 25 is provided at a pair of transfer arm portions 26a and 26b arranged in two upper and lower stages, a fork 27a provided at the tip of the transfer arm portion 26a, and a tip of the transfer arm portion 26b. And a fork 27b.
- Each of the transfer arm portions 26a and 26b is configured to be able to bend and stretch and turn.
- the forks 27a and 27b function as holding members that place and hold the wafer W thereon.
- the second transfer device 25 transfers the wafer W while the wafer W is placed on the forks 27a and 27b.
- the second transfer chamber 14 includes an air introduction part 41 provided in the upper part, an air discharge part 43 provided in the lower part, and a second part provided between the air introduction part 41 and the air discharge part 43.
- the transfer device 25 is provided.
- the second transfer chamber 14 includes an FFU (Fan Filter Unit) 45 provided adjacent to the air introduction unit 41 and a FOUP door 19c of the FOUP 19 mounted on each of the three load ports 18A to 18C.
- Three hoop openers 61 (not shown in FIG. 1) are provided as an opening / closing device for opening and closing.
- the air introduction unit 41 takes in external air from the air introduction port 41a.
- the air exhaust unit 43 is provided with an exhaust fan 43a.
- the exhaust fan 43 a discharges the air inside the second transfer chamber 14 to the outside of the second transfer chamber 14 from the air discharge port 43 b provided on the bottom surface of the air discharge unit 43.
- the FFU 45 includes a fan unit 47 and a filter unit 49 that are arranged in order from the upper side.
- the fan unit 47 includes a fan 47a that sends out the air downward.
- the filter unit 49 collects dust in the atmosphere that has passed through the fan unit 47.
- the FFU 45 flows into the inside of the second transfer chamber 14 through the atmosphere introduction unit 41 and forms a downflow of the atmosphere that flows out from the atmosphere discharge unit 43 through the substrate transfer unit provided with the second transfer device 25. To do.
- the FFU 45 collects and removes dust contained in the atmosphere. Thereby, the inside of the second transfer chamber 14 is maintained in a clean state.
- each of the transfer arm portions 26a and 26 b of the second transport device 25 is connected to an elevating unit 55 that moves up and down along a column 53 erected from the base 51 of the second transport device 25. Therefore, each of the transfer arm portions 26a and 26b is configured to be movable up and down in the Z-axis direction.
- a mapping sensor 57 is provided at the tip of the fork 27b of the transfer arm unit 26b, for example, to check the presence or absence and position of the wafer W by emitting laser light.
- FIG. 2B is an enlarged plan view showing the fork 27 b of the second transport device 25.
- the mapping sensor 57 includes a pair of light emitting unit 57a and light receiving unit 57b.
- the light beam output from the light emitting unit 57a is received by the light receiving unit 57b.
- the wafer W is interposed between the light emitting unit 57a and the light receiving unit 57b, the light beam is blocked by the wafer W, so that the presence of the wafer W is recognized, and its position information is acquired by the module controller 401A described later.
- the transfer arm unit 26b is extended in a multi-stage in each FOUP 19 with the transfer arm unit 26b extended halfway. Scanning (raising or lowering) is performed along the stacking direction of the accommodated wafers W.
- the mapping sensor 57 at the tip of the fork 27b.
- the fork 27b having the mapping sensor 57, the transport arm unit 26b, and the second transport device 25 are also mapping devices that perform a mapping operation.
- the hoops 19 placed on the load ports 18A, 18B, and 18C which are placement parts, are respectively removable from the main body 19a, the opening 19b provided in the main body 19a, and the opening 19b.
- a hoop door 19c which is an open / close door.
- the hoop opener 61 includes a port door 62 that holds the hoop door 19c, an advance / retreat mechanism 63 that moves the port door 62 horizontally, an arm 64 that connects the port door 62 and the advance / retreat mechanism 63, and the port door 62.
- An elevating mechanism 65 that moves the port door 62 vertically while holding the hoop door 19c is provided.
- the port door 62 detachably holds the hoop door 19c by a holding mechanism (not shown).
- the port door 62 is advanced or retracted in the X direction in FIG. 2A by the advance / retreat mechanism 63. At the advanced position, the port door 62 holds and removes the hoop doors 19c closing the openings 19b of the respective hoops 19.
- the port door 62 opens the opening 19b of the hoop 19 by retreating while holding the hoop door 19c. Further, the port door 62 advances while holding the hoop door 19 c and attaches the hoop door 19 c to the opening 19 b of the hoop 19. Next, the port door 62 retreats with the hoop door 19c detached, thereby closing the opening 19b of each hoop 19 with the hoop door 19c.
- the port door 62 In the retracted position, the port door 62 is raised or lowered in the Z direction in FIG. 2A together with the advance / retreat mechanism 63 while the hoop door 19c is held by the elevating mechanism 65.
- the port door 62 stores the hoop door 19 c in the lower part in the second transfer chamber 14 in the lowered position. Further, the port door 62 closes the opening 14a provided in the wall of the second transfer chamber 14 at the ascending position and the advanced position.
- Control system> 3 and 4A show a schematic configuration of a control system in the substrate processing system 1.
- the overall control in the substrate processing system 1 and the control of each component constituting the process module 10, the first transfer chamber 11, the loader module 20, etc., that is, the end device 201, are performed by the control unit 70.
- control unit 70 includes, as main components, an MC (module controller) 401 which is an individual control unit provided corresponding to each module as a first control unit, and a second control unit.
- the control unit includes an EC (apparatus controller) 301 that is an overall control unit that controls the entire substrate processing system 1, and a user interface 501 connected to the EC 301.
- the EC 301 and each MC 401 are connected by an intra-system LAN (Local Area Network) 503.
- the intra-system LAN 503 has a switching hub (HUB) 505.
- the switching hub 505 switches the MC 401 as a connection destination of the EC 301 in accordance with a control signal from the EC 301.
- the EC 301 is a general control unit that controls each operation of the substrate processing system 1 by controlling each MC 401.
- the EC 301 includes a CPU (Central Processing Unit) 303, a RAM 305 as a volatile memory, and a hard disk device (HDD) 307 as a storage unit.
- the storage unit is not limited to the hard disk device 307, and other storage means such as a nonvolatile memory may be used.
- the EC 301 is connected via a LAN 601 to a host computer 603 as a MES (Manufacturing Execution System) that manages the manufacturing process of the entire factory where the substrate processing system 1 is installed.
- the host computer 603 cooperates with the control unit 70 to feed back real-time information regarding various processes in the factory to a basic business system (not shown), and makes a determination regarding the process in consideration of the load of the entire factory.
- MES Manufacturing Execution System
- a user interface 501 is connected to the EC 301.
- the user interface 501 includes a keyboard on which a process manager inputs commands to manage the substrate processing system 1, a display that visualizes and displays the operating status of the substrate processing system 1, and a mechanical switch that instructs the EC 301 Etc.
- the EC 301 can record information on a computer-readable storage medium (hereinafter simply referred to as “storage medium”) 507 and can read information from the storage medium 507.
- storage medium for example, a CD-ROM, a hard disk, a flexible disk, a flash memory, a DVD, or the like can be used.
- the above recipe can be transmitted from other devices as needed via, for example, a dedicated line and used online.
- the CPU 303 reads a program (software) including a recipe related to a wafer W processing method designated by the user or the like in the user interface 501 from the hard disk device 307 or the storage medium 507. Then, by transmitting the program from the EC 301 to each MC 401, the processing in the process modules 10A to 10D and the loader module 20 can be controlled.
- a program software including a recipe related to a wafer W processing method designated by the user or the like in the user interface 501 from the hard disk device 307 or the storage medium 507.
- MC 401 is provided as an individual control unit that controls the operation of each module.
- five MCs 401 (MC401A, MC401B, MC401C, MC401D, MC401E) are illustrated.
- the MC 401A controls the loader module 20, and FIG. 3 shows connections with some end devices 201.
- examples of the end device 201 in the loader module 20 include the second transport device 25 including the mapping sensor 57, the hoop opener 61, and the like.
- the MCs 401B, 401C, 401D, and 401E control the process modules 10A, 10B, 10C, and 10D, respectively.
- the MC 401 can be arranged not only in the loader module 20 and the process module 10 but also in the first transfer chamber 11 and the load lock chambers 12A and 12B, for example, and these are also integrated under the EC 301. However, illustration is omitted in FIG.
- the MC 401A includes a CPU 403, a volatile memory unit 405A such as a RAM, a nonvolatile memory unit 405B, a counter unit 407, an I / O control unit 409, and a switch unit (SW). 410.
- the nonvolatile memory unit 405B of the MC 401A is configured by a nonvolatile memory such as SRAM, MRAM, EEPROM, flash memory, or the like.
- the nonvolatile memory unit 405B stores a program (software) including a recipe transmitted from the EC 301, various history information in the loader module 20 controlled by the MC 401A, various setting values, and the like.
- the counter unit 407 counts the number of close / open operations of the hoop door 19c (that is, the number of close / open operations of the port door 62) in the substrate position correcting method of the present embodiment.
- the I / O control unit 409 of the MC 401A sends various control signals to an I / O module 413, which will be described later, and receives signals such as status information about each end device 201 from the I / O module 413.
- the control of the end device 201 by each MC 401 is performed via an I / O (input / output) module 413.
- the I / O module 413 transmits a control signal to each end device 201 and an input signal from the end device 201.
- Each MC 401 is connected to the I / O module 413 via the network 411.
- the network 411 connected to each MC 401 has a plurality of systems such as channels CH0, CH1, and CH2.
- the I / O module 413 has a plurality of I / O boards 415 (only three are shown in FIG. 3) connected to each end device 201 constituting the process modules 10A to 10D. Control of input / output of digital signals, analog signals, and serial signals in the I / O module 413 is performed by these I / O boards 415. In FIG. 3, for convenience of explanation, only connections between some end devices 201 and the I / O board 415 are representatively illustrated.
- the input / output information managed in the I / O board 415 includes four types of digital input information DI, digital output information DO, analog input information AI, and analog output information AO.
- the digital input information DI relates to digital information input from each end device 201 located in the lower level of the control system to the MC 401 positioned in the higher level of the control system.
- the digital output information DO relates to digital information output from the MC 401 positioned above the control system to each end device 201 positioned below the control system.
- the analog input information AI relates to analog information input from each end device 201 to the MC 401.
- the analog output information AO relates to analog information output from the MC 401 to each end device 201.
- the digital input information DI and analog input information AI include, for example, information regarding the status of each end device 201.
- the digital output information DO and the analog output information AO include, for example, commands (commands) to the end devices 201.
- FIG. 4B is a functional block diagram showing a functional configuration of MC 401A.
- the MC 401A includes an open / close control unit 421, a mapping operation control unit 422, and a determination unit 423. These are realized by the CPU 403 executing a program stored in the nonvolatile memory unit 405B using the volatile memory unit 405A as a work area.
- the opening / closing control unit 421 controls the hoop door 19c to be opened and closed by driving the hoop opener 61 based on the recipe, parameters, and the like. In addition, the opening / closing control unit 421 performs control so as to perform a closing / opening operation in which the hoop opener 61 closes and opens the hoop door 19c when the determination result in the determination unit 423 described later is “abnormal state”.
- the mapping operation control unit 422 controls the mapping device to perform the mapping operation based on the recipe, parameters, and the like. Further, when the determination result in the determination unit 423 described later is “abnormal state”, when the close / open operation is performed by the opening / closing control unit 421, the mapping device performs control so that the mapping operation is performed again.
- the determination unit 423 determines whether the position of the wafer W is normal or abnormal based on the position information of the wafer W from the mapping sensor 57.
- an I / O board 415 connected to a plurality of end devices 201 is modularized to form an I / O module 413.
- the I / O module 413 is connected to the EC 301 via the MC 401 and the switching hub 505, respectively.
- the control system is hierarchized by a configuration in which the plurality of end devices 201 are connected directly via the I / O module 413 and the MC 401 without being directly connected to the EC 301.
- FIG. 5 is a flowchart showing an outline of the procedure of the substrate position correcting method according to the present embodiment.
- 6A and 6B are explanatory views showing the principle that the wafer W is corrected by the closing / opening operation of the hoop door 19c.
- the substrate position correcting method according to the present embodiment includes the steps STEP1 to STEP5.
- the wafer W accommodated in the FOUP 19 is mapped by the mapping device.
- the mapping device is configured by the second transport device 25 including the fork 27 b having the mapping sensor 57.
- the timing for executing the mapping is, for example, immediately after the completion of the operation of accommodating the predetermined number of wafers W that have been processed in an arbitrary process module 10 of the substrate processing system 1 in the FOUP 19 by the second transfer device 25. It is. Therefore, at the start of the mapping of STEP1, the hoop door 19c is open.
- the position of the wafer W is in an abnormal state based on the position information of the wafer W detected by the mapping operation. This determination is made, for example, if the detected position of the wafer W is within a predetermined margin (or threshold value) set in advance with reference to the position of the wafer W in a normal state. If it is out of the normal state, it is determined as an abnormal state. This determination is performed by the MC 401A acquiring position information from the mapping sensor 57.
- the predetermined margin (or threshold value) used for the determination can be stored in the nonvolatile memory unit 405B of the MC 401A, for example.
- the hoop door 19c is once closed and then opened / closed. Specifically, first, the port door 62 of the hoop opener 61 is displaced from the lowered position to the raised position and further from the retracted position to the advanced position while holding the hoop door 19c. Then, the hoop door 19c held by the port door 62 is pressed against the opening 19b of the main body 19a of the hoop 19 and engaged with the main body 19a, thereby closing the opening 19b. This is the closing operation.
- the hoop door 19c is held by the port door 62, removed from the main body 19a of the hoop 19, and the port door 62 is displaced from the advanced position to the retracted position, and further from the raised position to the lowered position, so that the second transfer chamber 14 to store.
- Up to here is the open operation.
- the operation of displacing the port door 62 from the lowered position to the raised position and the action of displacing from the raised position to the lowered position while holding the hoop door 19c may not be included in the close / open operation. That is, in the substrate position correcting method according to the present embodiment, the close / open operation may be performed only between the retracted position and the advanced position of the port door 62.
- FIG. 6A shows a state in the hoop 19 immediately before closing the hoop door 19c when the position of the wafer W is abnormal.
- FIG. 6B shows a state in the hoop 19 after the hoop door 19c is closed from the state of FIG. 6A.
- FIG. 6A for example, ten wafers W are accommodated in a layered manner.
- the fifth wafer W from the top indicated by the thick arrow protrudes toward the opening 19b in an inclined state. In other words, the position of the fifth wafer W is in an abnormal state where it is lowered forward.
- the port door 62 is displaced from the retracted position to the advanced position while holding the hoop door 19c, so that the hoop door 19c is opened in the main body 19a of the hoop 19 as shown in FIG. 6B.
- the opening 19b is closed by pressing against the portion 19b.
- the closing operation of the hoop door 19c the wall surface of the hoop door 19c comes into contact with the end portion of the wafer W in an abnormal state protruding in the forward tilt posture, and can be pushed toward the back side of the main body 19a. With this closing operation, the abnormal state of the position of the fifth wafer W from the top is eliminated and the normal state is obtained.
- FIG. 6C shows a state immediately before closing the hoop door 19c in the closing / opening operation of the modification of the present embodiment.
- a valley-like groove 19d may be provided on the inner wall surface of the hoop door 19c at a pitch substantially the same as the accommodation interval of the wafer W in the hoop 19. In this case, it is possible to easily correct the position of the wafer W in an abnormal state by making the slope of the valley or the bottom of the groove 19d contact the end of the wafer W.
- the number of times of closing / opening the hoop door 19c (that is, the number of times of closing / opening the port door 62) is counted.
- the count of the number of close / open operations is performed, for example, in the counter unit 407 of the MC 401A.
- the count value is cleared to 0 by the start of this processing procedure, and is accumulated while this processing procedure is repeated. For example, “1” is counted for the first close / open operation in this processing procedure. Accordingly, when the count value is 2 or more, it means that the retry is being repeated, and the number of retries is the count value -1.
- This set value means, for example, a numerical value obtained by adding “1” to the upper limit of the number of retries for repeating this processing procedure. That is, the value of the set value -1 corresponds to the upper limit of the number of retries in this processing procedure. For example, when the set value is “5”, the upper limit of the number of retries is 4, and this processing procedure is repeated until the count value of the number of close / open operations of the hoop door 19c reaches “5”.
- the MC 401A determines whether or not the count value of the number of close / open operations of the hoop door 19c is less than the set value.
- the set value can be stored in the nonvolatile memory unit 405B of the MC 401A.
- the processing after STEP 3 is stopped and this processing procedure is terminated.
- the FOUP 19 in which the wafer W is normally accommodated may stand by, for example, for performing another process in the substrate processing system 1, or the FOUP door 61 c is closed by the FOUP opener 61 and transferred to another substrate processing system. May be.
- the position information of each wafer W in the FOUP 19 detected by the mapping is from the MC 401A to a control unit higher than the MC 401A. Send to EC301.
- the position information of the wafer W in the FOUP 19 and the information on the number of stored wafers, together with other information such as the management number of the FOUP 19, are further higher than the hard disk device 307, the storage medium 507, or the EC 301 in the EC 301.
- the data is stored in a storage unit (not shown) of the host computer 603 that is a control unit.
- the information regarding the hoop 19 is first transferred from the MC 401A to the EC 301. In order to transmit, only the position information and the information on the number of sheets determined for a certain hoop 19 are transmitted to the EC 301. Therefore, wasteful information exchange in the substrate processing system 1 can be eliminated, and the information processing load can be reduced.
- the positional information of the wafer W in the abnormal state detected in the last mapping operation is transmitted from the MC 401A to the EC 301 which is a control unit higher than the MC 401A.
- the position information and the number information of the wafer W in the FOUP 19 together with other information such as the management number of the FOUP 19 are controlled at a higher level than the hard disk device 307, the storage medium 507, or the EC 301 in the EC 301.
- the position information determined for a certain hoop 19 is determined. Only the number of pieces of information is transmitted. Therefore, wasteful information exchange in the substrate processing system 1 can be eliminated, and the information processing load can be reduced.
- the close / open operation of the hoop door 19c of the hoop 19 is automatically performed without providing a special mechanism and without manual operation.
- the abnormal state of the wafer W in the hoop 19 can be quickly corrected. Therefore, it is possible to shorten the downtime in the loader module 20 of the substrate processing system 1 as much as possible, and to prevent a decrease in production efficiency of the semiconductor device.
- FIG. 7 is a flowchart showing an outline of the procedure of the substrate position correcting method of the present embodiment.
- the substrate position correcting method of the present embodiment is a modification of the substrate position correcting method of the first embodiment, and includes the procedures of STEP11 to STEP16.
- the wafers W to be processed are accommodated in multiple stages in the hoop 19 and the hoop 19 is closed from the other substrate processing system while the hoop door 19c is closed. It can be preferably applied when it is conveyed to 1. Further, in the substrate position correcting method of the present embodiment, for example, the processing is interrupted for some reason in the substrate processing system 1, the wafer W is accommodated in the FOUP 19, the FOUP door 19 c is closed and made to stand by. It can be preferably applied to a case where the processing is resumed after the operation.
- the hoop door 19c of the target hoop 19 placed on one of the load ports 18A, 18B, 18C is opened. That is, the port door 62 holds the hoop door 19c, removes it from the main body 19a of the hoop 19, and displaces the port door 62 from the advanced position to the retracted position, and further from the raised position to the lowered position. 14 to store.
- STEP 12 mapping is performed. Since the procedure from STEP 12 to STEP 16 is the same as the processing of STEP 1 to STEP 5 in FIG. 5, the individual description is omitted. That is, STEP 12 corresponds to STEP 1 in FIG. 5, STEP 13 corresponds to STEP 2, STEP 14 corresponds to STEP 3, STEP 15 corresponds to STEP 4, and STEP 16 corresponds to STEP 5.
- the mapping of STEP 12 is always performed when the hoop door 19c is opened from the state in which the wafer W is accommodated in the hoop 19. If the wafer position is determined to be abnormal (Yes) in the next STEP 13 based on the mapping result of STEP 12, the hoop door 19c is closed / opened (STEP 14). Then, the number of times of closing / opening is counted (STEP 15), and it is determined whether or not it is less than the set value (STEP 16). Thereafter, mapping is again performed (STEP 12), and the processing up to STEP 16 is repeated as in the above embodiment.
- the loader module 20 can reliably and safely carry in / out the wafer W from the target FOUP 19.
- the substrate to be processed in the substrate processing system 1 is not limited to a semiconductor wafer, and may be a glass substrate for manufacturing a flat panel display, a substrate for manufacturing a solar cell panel, or the like.
- the substrate processing system including the four process modules 10 and the loader module 20 has been described as an example.
- the configuration of the substrate processing system is arbitrary, and the substrate processing system having another configuration can be used. Is also applicable.
- the substrate processing system including a plurality of vacuum apparatuses is taken as an example, but the present invention can also be applied to a substrate processing system that performs processing at atmospheric pressure.
- the wafer position is determined not to be abnormal (No) in STEP 2 (or STEP 13), or the count value of the number of close / open operations of the hoop door 19c is determined in STEP 5 (or STEP 16).
- the positional information regarding the wafer W is transmitted from the MC 401A to the EC 301, which is the upper control unit. That is, while the procedure of STEP 1 to STEP 5 (or STEP 12 to STEP 16) is repeated, the EC 301 is notified for the first time when it is finally determined that the wafer position is normal or abnormal.
- each time a mapping operation is performed information regarding the hoop 19 including position information regarding the wafer W may be transmitted from the MC 401A to the EC 301.
- the determination of STEP 2 (or STEP 13) and the determination of STEP 5 (or STEP 16) are performed by the MC 401A. However, these determinations may be performed by the EC 301 which is the upper control unit. Good.
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Abstract
Description
前記搬送容器が装着される載置部と、
前記載置部に装着された前記搬送容器の前記開閉扉を保持して開閉動作を行う開閉装置と、
前記開閉扉が開放された状態でマッピング動作を実施し、前記搬送容器に収容された基板位置を検出し、基板位置情報として取得するマッピング装置と、
前記開閉装置及び前記マッピング装置を制御する第1の制御部と、
を備えている。
基板を挿入する開口部及び該開口部を閉じる開閉扉を有し、複数の基板を多段に支持して収容する搬送容器が装着される載置部と、
前記載置部に装着された前記搬送容器の前記開閉扉を保持して開閉動作を行う開閉装置と、
前記開閉扉が開放された状態でマッピング動作を実施し、前記搬送容器に収容された基板位置を検出し、基板位置情報として取得するマッピング装置と、
前記開閉装置及び前記マッピング装置を制御する制御部と、
を備え、前記搬送容器を使用し、基板の搬入と搬出を行う基板処理システムにおいて前記搬送容器に収容された基板の位置を矯正する基板位置矯正方法である。
前記マッピング装置によりマッピング動作を行うステップと、
前記マッピング動作で前記基板位置が異常状態であることが検出された場合、前記開閉扉を閉じた後開放するクローズ/オープン動作を行うステップと、
前記マッピング装置により再度のマッピング動作を行うステップと、
を有することを特徴とする。
まず、図1を参照して、本発明の第1の実施の形態に係る基板処理システムの構成について説明する。
<基板処理システムの構成>
図1は、本実施の形態に係る基板処理システムの概略の構成を示す平面図である。本実施の形態に係る基板処理システム1は、連続する複数の動作を伴って、例えば半導体デバイス製造用の半導体基板(以下、「ウエハ」と記す)Wに対して、成膜処理、拡散処理、エッチング処理等の所定の処理を施す装置である。
次に、図2Aを参照しながら、ローダーモジュール20の構成について詳細に説明する。図2Aは、図1におけるIIA-IIA線における断面図である。まず、第2の搬送室14は、上部に設けられた大気導入部41と、下部に設けられた大気排出部43と、大気導入部41と大気排出部43との間に設けられた第2の搬送装置25と、を備えている。また、第2の搬送室14は、大気導入部41に隣接して設けられたFFU(Fan Filter Unit)45と、3つのロードポート18A~18Cにそれぞれ載置された状態のフープ19のフープドア19cを開閉する開閉装置として3つのフープオープナ61(図1では図示を省略)を備えている。
図3及び図4Aは、基板処理システム1における制御系統の概略構成を示している。基板処理システム1における全体の制御や、プロセスモジュール10、第1の搬送室11及びローダーモジュール20などを構成する各構成部すなわちエンドデバイス201の制御は、制御部70によって行われる。
次に、本発明の第2の実施の形態に係る基板処理システム及び基板位置矯正方法について説明する。本実施の形態の基板処理システムの構成は、図1~図4Bに示した第1の実施の形態の基板処理システム1と同様であるため、重複した説明を省略する。図7は、本実施の形態の基板位置矯正方法の手順の概要を示すフローチャートである。本実施の形態の基板位置矯正方法は、第1の実施の形態の基板位置矯正方法の変形例であり、STEP11~STEP16の手順を含んでいる。本実施の形態の基板位置矯正方法は、例えば、フープ19内に処理対象のウエハWが多段に収容され、フープドア19cが閉じられた状態で、フープ19が、他の基板処理システムから基板処理システム1に搬送されてきた場合に好ましく適用できる。また、本実施の形態の基板位置矯正方法は、例えば、基板処理システム1内で、何等かの事情で処理を中断し、ウエハWをフープ19内に収容してフープドア19cを閉じて待機させていた後で、処理を再開する場合などにも好ましく適用できる。
Claims (9)
- 基板を挿入する開口部及び該開口部を閉じる開閉扉を有し、複数の基板を多段に支持して収容する搬送容器を使用し、基板の搬入と搬出を行う基板処理システムであって、
前記搬送容器が装着される載置部と、
前記載置部に装着された前記搬送容器の前記開閉扉を保持して開閉動作を行う開閉装置と、
前記開閉扉が開放された状態でマッピング動作を実施し、前記搬送容器に収容された基板位置を検出し、基板位置情報として取得するマッピング装置と、
前記開閉装置及び前記マッピング装置を制御する第1の制御部と、
を備えており、
前記第1の制御部は、前記マッピング装置からの前記基板位置情報に基づき、前記基板位置が正常状態であるか異常状態であるかを判定し、異常状態である場合に、前記開閉装置により前記開閉扉を閉じた後開放するクローズ/オープン動作を行った後、前記マッピング装置により再度のマッピング動作を行うように制御することを特徴とする基板処理システム。 - 前記第1の制御部は、前記クローズ/オープン動作と、前記再度のマッピング動作と、を繰り返し行うように制御する請求項1に記載の基板処理システム。
- 前記第1の制御部は、前記再度のマッピング動作により検出された前記基板位置が正常状態である場合に、前記クローズ/オープン動作と前記再度のマッピング動作を中止するとともに、最後のマッピング動作で得られた前記正常状態の前記基板位置情報を前記第1の制御部よりも上位の第2の制御部に送信する請求項2に記載の基板処理システム。
- 前記クローズ/オープン動作と前記再度のマッピング動作の繰り返し回数が、設定された回数に達した場合に、繰り返しを中止するとともに、最後のマッピング動作で得られた前記基板位置情報を前記第1の制御部よりも上位の第2の制御部に送信する請求項2に記載の基板処理システム。
- 基板を挿入する開口部及び該開口部を閉じる開閉扉を有し、複数の基板を多段に支持して収容する搬送容器が装着される載置部と、
前記載置部に装着された前記搬送容器の前記開閉扉を保持して開閉動作を行う開閉装置と、
前記開閉扉が開放された状態でマッピング動作を実施し、前記搬送容器に収容された基板位置を検出し、基板位置情報として取得するマッピング装置と、
前記開閉装置及び前記マッピング装置を制御する制御部と、
を備え、前記搬送容器を使用し、基板の搬入と搬出を行う基板処理システムにおいて前記搬送容器に収容された基板の位置を矯正する基板位置矯正方法であって、
前記マッピング装置によりマッピング動作を行うステップと、
前記マッピング動作で前記基板位置が異常状態であることが検出された場合、前記開閉扉を閉じた後開放するクローズ/オープン動作を行うステップと、
前記マッピング装置により再度のマッピング動作を行うステップと、
を有することを特徴とする基板位置矯正方法。 - 前記クローズ/オープン動作を行うステップと、前記再度のマッピング動作を行うステップと、を繰り返す請求項5に記載の基板位置矯正方法。
- 前記制御部は、前記再度のマッピング動作により検出された前記基板位置が正常状態である場合に、前記クローズ/オープン動作を行うステップと前記再度のマッピング動作を行うステップとの繰り返しを中止する請求項6に記載の基板位置矯正方法。
- 前記クローズ/オープン動作を行うステップと前記再度のマッピング動作を行うステップとの繰り返し回数が、設定された回数に達した場合に、繰り返しを中止する請求項6に記載の基板位置矯正方法。
- 基板を挿入する開口部及び該開口部を閉じる開閉扉を有し、複数の基板を多段に支持して収容する搬送容器を使用し、基板の搬入と搬出を行う基板処理システムであって、
前記搬送容器が装着される載置部と、
前記載置部に装着された前記搬送容器の前記開閉扉を保持して開閉動作を行う開閉装置と、
前記開閉扉が開放された状態でマッピング動作を実施し、前記搬送容器に収容された基板位置を検出し、基板位置情報として取得するマッピング装置と、
前記開閉装置及び前記マッピング装置を制御する制御部と、
を備えており、
前記制御部は、
前記マッピング装置からの前記基板位置情報に基づき、前記基板位置が正常状態であるか異常状態であるかを判定する判定部と、
前記判定部における判定結果が異常状態である場合に、前記開閉装置により前記開閉扉を閉じた後開放するクローズ/オープン動作を行う開閉制御部と、
前記クローズ/オープン動作が行われた場合に、前記マッピング装置により再度のマッピング動作を行うように制御するマッピング動作制御部と、
を備えたことを特徴とする基板処理システム。
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- 2013-01-08 US US14/370,973 patent/US9318363B2/en not_active Expired - Fee Related
- 2013-01-08 KR KR1020147018899A patent/KR20140119013A/ko not_active Application Discontinuation
- 2013-01-09 TW TW102100714A patent/TW201344826A/zh unknown
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CN110957240A (zh) * | 2018-09-27 | 2020-04-03 | 台湾积体电路制造股份有限公司 | 感应器、装载端及水平方法 |
CN110957240B (zh) * | 2018-09-27 | 2022-07-26 | 台湾积体电路制造股份有限公司 | 感应器、装载端及水平方法 |
Also Published As
Publication number | Publication date |
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US20150005928A1 (en) | 2015-01-01 |
US9318363B2 (en) | 2016-04-19 |
TW201344826A (zh) | 2013-11-01 |
KR20140119013A (ko) | 2014-10-08 |
JP2013143425A (ja) | 2013-07-22 |
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