WO2014092074A1 - 基板処理装置、基板処理システム及び搬送容器の異常検出方法 - Google Patents
基板処理装置、基板処理システム及び搬送容器の異常検出方法 Download PDFInfo
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- WO2014092074A1 WO2014092074A1 PCT/JP2013/083066 JP2013083066W WO2014092074A1 WO 2014092074 A1 WO2014092074 A1 WO 2014092074A1 JP 2013083066 W JP2013083066 W JP 2013083066W WO 2014092074 A1 WO2014092074 A1 WO 2014092074A1
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- transport container
- container
- load port
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- carrier
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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
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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
- H01L21/67253—Process monitoring, e.g. flow or thickness monitoring
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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
- H01L21/67766—Mechanical parts of transfer devices
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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
- H01L21/67769—Storage means
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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
- H01L21/67775—Docking arrangements
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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
- H01L21/67778—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 loading and unloading of wafers
Definitions
- the present invention relates to a technical field for monitoring an abnormality of a transport container in an apparatus for processing a substrate carried by the transport container.
- a semiconductor substrate is stored in a transfer container, and the transfer container is transferred to a semiconductor manufacturing apparatus by an automatic transfer robot (AGV) or a ceiling transfer device (OHT).
- the semiconductor manufacturing apparatus includes a carry-in / carry-out port for a transfer container and a processing block that performs processing on a semiconductor substrate.
- AVG automatic transfer robot
- OHT ceiling transfer device
- the semiconductor manufacturing apparatus includes a carry-in / carry-out port for a transfer container and a processing block that performs processing on a semiconductor substrate.
- a sealed container having a lid on the front surface is the mainstream, and in the case of a 12-inch semiconductor wafer, an abbreviation FOUP is used.
- the FOUP has a lid on the front surface of a transport container (container body) made of resin, and the lid has two key holes.
- Patent Document 1 shows an example of the configuration.
- the carry-in / out port is generally called a load port and includes a stage on which the FOUP is placed from the outside. More specifically, the load port is rotated by pressing the stage against the partition wall by a drive mechanism such as a motor or an air cylinder, and inserting a key (opening / closing mechanism) from the device side into the key hole of the lid through the opening formed in the partition wall. The key is retracted to remove the lid.
- an apparatus suitable for each process of the semiconductor manufacturing process for example, a film forming apparatus, an apparatus for forming a mask pattern, an etching apparatus, a cleaning apparatus, etc. is used, and the semiconductor substrate is sequentially transferred between them by a transfer container.
- a film forming apparatus for example, a film forming apparatus, an apparatus for forming a mask pattern, an etching apparatus, a cleaning apparatus, etc.
- the semiconductor substrate is sequentially transferred between them by a transfer container.
- the present invention has been made under such circumstances, and an object of the present invention is to provide a technique capable of quickly detecting an abnormality in a transport container for storing a substrate and carrying it into a substrate processing apparatus.
- the substrate processing apparatus of the present invention is a substrate processing apparatus in which a substrate extraction port on the front surface of a container body is hermetically closed by a lid, and a substrate is taken out from a transfer container for processing and storing a plurality of substrates.
- the parameter value transition data includes the number of times the transport container is used, the operation performed to load the transport container into the load port and remove the lid, and A parameter value obtained by associating the result of at least one of the operations performed to carry the transport container out of the load port with a numerical value.
- the parameter value associated with at least one of loading and unloading of the transfer container and the parameter value associated with the transfer container
- a determination unit that determines whether there is an abnormality in the transfer container based on past transition data.
- a substrate processing system includes a load port in which a substrate outlet on the front surface of a container body is hermetically closed by a lid, and a transport container for storing and transporting a plurality of substrates is carried in and out.
- a plurality of substrate processing apparatuses each including a substrate processing unit for processing a substrate taken out from the transfer container carried into the load port; and an apparatus controller for controlling an operation in the load port;
- a host computer that communicates with each of the substrate processing apparatuses, the host computer is a storage unit that stores transition data of parameter values sent from the outside based on the identification code of the transport container, The parameter value transition data were used to remove the lid by loading the transport container into the load port and the number of times the transport container was used.
- the storage unit and the load port of the substrate processing apparatus which associates the parameter value obtained by quantifying the result of at least one of the operation and the operation performed to unload the transfer container from the load port.
- the abnormality of the transport container is determined based on the parameter value associated with at least one of the transporting and unloading of the transport container and the past transition data of the parameter value concerning the transport container.
- a determination unit for determining presence or absence is provided.
- a method of detecting an abnormality of a transport container for storing and transporting a plurality of substrates wherein the substrate take-out port on the front surface of the container body is hermetically closed by a lid body, and is taken out from the transport container.
- the operation of attaching the lid to the container body is included in the operation performed to carry out the transport container from the load port.
- the present invention based on the identification code of the transport container, the number of times the transport container is used, the operation performed to load the transport container into the load port and remove the lid, and the lid to the container body
- the parameter value transition data in which the parameter value obtained by quantifying the result of at least one of the operations performed for attaching and carrying out the transfer container from the load port is stored is stored.
- the presence / absence of abnormality of the transport container is determined based on the parameter value obtained by at least one of loading and unloading of the transport container with respect to the load port and the transition data. To do. By doing in this way, abnormality can be detected quickly about a conveyance container.
- FIG. 1 is a perspective view of a coating and developing apparatus which is a substrate processing apparatus to which the present invention is applied. It is a block diagram of a system including the coating and developing apparatus and a host computer. It is a side view of the carrier block of the said coating and developing apparatus. It is a side view of the carrier block of the said coating and developing apparatus. It is a perspective view of the opening / closing door and carrier of the carrier block. It is explanatory drawing which shows the opening / closing operation
- FIG. 1 is a perspective view of the coating and developing apparatus 1.
- the coating and developing apparatus 1 is installed in a clean room in a semiconductor manufacturing factory, and is configured by linearly connecting a carrier block E1, a processing block E2, and an interface block E3.
- An exposure device E4 is connected to the interface block E3 on the opposite side of the processing block E2.
- the outside of the coating / developing apparatus 1 is a carrier region 11 for a carrier C in which a plurality of wafers W are stored.
- a carrier transport mechanism 12 described later transports the carrier C in the transport region 11.
- the carrier C is, for example, a transport container called FOUP.
- the carrier block E1 is a block for delivering the carrier C to and from the carrier transport mechanism 12.
- the carrier block E1 transfers the wafer W between the carrier C transported to the carrier block E1 and the processing block E2.
- the carrier block E1 will be described in detail later.
- the processing block E2 is a block for performing various liquid processing such as resist coating processing and development processing and heat processing on the wafer W.
- the exposure apparatus E4 exposes the resist film formed on the wafer W in the processing block E2.
- the interface block E3 transfers the wafer W between the processing block E2 and the exposure apparatus E4.
- the wafer W unloaded from the carrier C is subjected to a resist coating process and a heating process in order in the processing block E2, and then exposed in the exposure apparatus E4, and then subjected to a heating process and a development process in the processing block E2. , Returned to the carrier C.
- an apparatus controller 2 for controlling the operation of each part of the coating and developing apparatus 1 is provided on the side surface of the carrier block E1.
- the device controller 2 is a computer and transmits a control signal to each unit.
- Each part of the carrier block E1 receives this control signal, and is controlled such that a wafer W loading operation and a wafer W unloading operation described later are performed.
- each of the blocks E1 to E3 receives this control signal, so that the wafer W is transferred between the blocks and the wafer W is processed as described above.
- each coating / developing apparatus 1 is installed in the clean room.
- the apparatus controller 2 of each coating / developing apparatus 1 is connected to a host computer 20 to constitute a substrate processing system 200. ing.
- the device controller 2 will be described in detail later.
- the host computer 20 transmits a control signal to the carrier transport mechanism 12 to control the transport of the carrier C in the clean room. Further, an ID number as an identification code is assigned to each carrier C and each wafer W included in the carrier C, and this ID number is transmitted to each apparatus controller 2.
- a cluster apparatus having an etching unit for performing dry etching, a film forming unit for forming a film by CVD or PVD, and a large number of wafers W are collectively shown.
- Various substrate processing apparatuses for processing the wafer W such as a vertical heat treatment apparatus for performing heat treatment, are provided in the clean room.
- the substrate processing apparatus also includes an inspection apparatus that performs a predetermined inspection on the wafer W.
- These various processing apparatuses other than the coating and developing apparatus 1 also include a block corresponding to the carrier block E1, and as with the coating and developing apparatus 1, the carrier C is transferred and the wafer W is transferred to and from the carrier C. Is called.
- These various processing apparatuses also include an apparatus controller 2 connected to the host computer 20 in the same manner as the coating and developing apparatus 1.
- a large number of carriers C are transported in the clean room.
- Each carrier C is transported between the devices in the order set by the host computer 20 in the clean room, is loaded into one device, is loaded into many other devices, and is loaded again into the one device. Used as follows. That is, the carrier C is repeatedly used between the same device and different devices.
- the carrier transport mechanism 12 shown in FIG. 1 will be described.
- the carrier transport mechanism 12 is a so-called ceiling transport device, and includes a moving unit 14 that moves a track 13 formed on the ceiling of the clean room, and a grip unit 15. .
- the gripping unit 15 can move up and down relative to the moving unit 14 and can grip the carrier C, and can transport the carrier C between the devices in the clean room.
- the carrier block E1 includes a housing 31.
- the housing 31 delivers the carrier C to and from the carrier transport mechanism 12 and also delivers the wafer W between the carrier C and the coating and developing device 1.
- the load port 3 is configured.
- the load port 3 includes a stage 32 on which the carrier C is placed, a transfer port 33 for the wafer W, and an open / close door 4 that opens and closes the transfer port 33 in addition to the housing 31.
- the carrier block E1 is provided with four load ports 3. A lower portion of the casing 31 protrudes rearward to form a stepped portion 34. On the step portion 34, the stages 32 of the load ports 3 are arranged in the lateral direction. Each transfer port 33 is opened on the wall surface of the casing 31 as viewed from the respective stages 32 toward the front side.
- the stage 32 moves forward and backward to move the carrier C between a backward position (unload position) and a forward position (load position).
- the carrier C positioned at the unload position is indicated by a chain line
- FIG. 4 illustrates the carrier C positioned at the load position.
- the carrier C is transported to the unload position by the carrier transport mechanism 12.
- the wafer W is transferred to the carrier block E1 at the load position.
- the stage 32 is connected to a stage moving mechanism 35 having a motor, and the stage moving mechanism 35 can perform the above-described forward movement and backward movement.
- the stage 32 is provided with a clamp mechanism 37.
- a cross section on the lower side of the carrier C and the clamp mechanism 37 are shown in a dotted frame at the end of the arrow of the chain line in FIG.
- 52 is an engaging portion provided on the carrier C.
- the claw 38 provided in the clamp mechanism 37 is rotated by a rotation mechanism 39 constituted by a motor. As a result, it is possible to switch between a state in which the engagement portion 52 is engaged as indicated by the solid line in the frame and a state in which the engagement is released as indicated by the chain line. C is fixed to the stage 32.
- the position of the claw 38 where the engagement indicated by the solid line is formed is defined as a lock position, and the position where the engagement indicated by the chain line is not formed is defined as an unlock position.
- the carrier C will be described with reference to FIG.
- the carrier C includes a container body 5 that is a container body, and a lid 50 that is detachable from the container body 5.
- a container body 5 that is a container body
- a lid 50 that is detachable from the container body 5.
- support portions 53 that support the peripheral portion on the back surface side of the wafer W are provided in multiple stages.
- An extraction port 54 for the wafer W is formed on the front surface of the container body 5, and the inside of the container body 5 is kept airtight by the lid 50 closing the extraction port 54.
- Engaging grooves 55a are respectively formed on the left and right upper and lower sides of the opening edge portion 55 of the outlet 54 (the upper engaging groove 55a is not shown).
- a grip 501 is provided for gripping the carrier transport mechanism 12 described above for transporting the carrier C.
- the lid 50 will be described. Inside the lid 50, rotating portions 56 are provided on the left and right. A linear motion portion 57 extending in the vertical direction is provided above and below the rotation portion 56. The linear motion portion 57 moves a distance corresponding to the amount of rotation of the rotation portion 56, and switches between a state in which the tip protrudes from the upper side and the lower side of the lid 50 and a state in which the tip is drawn into the lid 50. The front end of the linear motion portion 57 is engaged with the engagement groove 55a of the container body 5, whereby the lid 50 is engaged with the container body 5 and is locked. A latch key 44 (to be described later) is inserted into the rotating portion 56, and a key hole 56a to be engaged is provided. The rotating portion 56 is rotated by the rotation of the latch key 44 engaged in this manner. On the front surface of the lid 50, an opening is formed at a position overlapping the key hole 56a so that the latch key 44 can be inserted into the rotating portion 56 in this way.
- the open / close door 4 includes a door body 40 that closes the transfer port 33 from the inside of the housing 31.
- the position where the door main body 40 closes the conveyance port 33 is indicated by a solid line, and this position is a closed position.
- a door opening / closing mechanism 41 is connected to the door body 40, and when the conveyance port 33 is opened, the door opening / closing mechanism 41 moves the door body 40 from the closed position to the separated position. Then, the door opening / closing mechanism 41 is lowered from the separated position to an open position indicated by a chain line in FIG.
- a transfer mechanism 16 shared by each load port 3 is provided in the casing 31.
- the wafer W can be transferred between the inside of the carrier C and the processing block E2 via the opened transfer port 33.
- the opening / closing door 4 includes a lid opening / closing mechanism 43 on the rear side of the door body 40, and the lid opening / closing mechanism 43 includes a latch key 44 on the rear side thereof.
- the latch key 44 is rotated around a horizontal axis by a motor (not shown) provided in the lid opening / closing mechanism 43. As the carrier C placed on the stage 32 moves forward and backward by the stage 32, the latch key 44 is inserted into and extracted from the key hole 56 a of the rotating portion 56 of the lid 50.
- a series of operations until the carrier C is placed on the stage 32 and the wafer W in the carrier C is loaded into the apparatus is referred to as a carrier C loading process.
- the carrier C loading process will be described step by step with reference to FIGS.
- the carrier C is transferred from the carrier transport mechanism 12 to the stage 32 so as to be positioned at the unload position, and the claw 38 of the clamp mechanism 37 moves from the unlock position to the lock position, so that the carrier C is fixed to the stage 32. (FIG. 6). Then, the stage 32 moves forward, and the carrier C moves toward the load position.
- the latch key 44 is inserted into the key hole 56a of the rotating portion 56, and the carrier C is positioned at the load position as shown in FIG. Then, the latch key 44 rotates to release the engagement between the lid 50 and the container body 5 and the lid 50 is held by the lid opening / closing mechanism 43. Thereafter, the door main body 40 moves forward and moves to a separated position away from the housing 31, and further descends and moves to the open position, thereby opening the transport port 33 as shown in FIG. Thereafter, the wafer W of the container body 5 is transferred to the processing block E2.
- carrier C unload processing A series of operations from returning the wafer W to the carrier C from the coating / developing apparatus 1, closing the transfer port 33, and unloading the carrier C from the stage 32 is referred to as carrier C unload processing.
- the reverse operation of the load process is performed. Specifically, after the wafer W is returned to the carrier C, the door body 40 is sequentially moved up to the separated position and moved to the closed position, whereby the transfer port 33 is closed and the lid 50 is placed in the container. Pressed against the body 5. Then, the latch key 44 is rotated, the engagement between the lid 50 and the container body 5 is formed, and the holding of the lid 50 by the lid opening / closing mechanism 43 is released, and the carrier C moves to the unload position. Thereafter, the claw 38 moves from the locked position to the unlocked position, the carrier C is released from being fixed to the stage 32, and the carrier C is transported to another device by the carrier transport mechanism 12.
- the apparatus controller 2 monitors the torques of the motors provided in the stage moving mechanism 35, the clamp mechanism 37, the lid opening / closing mechanism 43, and the door body 40 during the loading process and unloading process of the carrier C, which will be described later. So get that value. Further, the time until these motors rotate by a predetermined amount from a predetermined position is monitored, and various time parameters described later are acquired.
- the linear motion portion 57 is inserted into the engagement groove 55a and the engagement is formed.
- the motor of the lid opening / closing mechanism 43 depends on the presence or absence of friction between the linear movement portion 57 and the engagement groove 55a. Torque changes.
- the device controller 2 can detect whether or not the engagement is released by the change in the torque.
- the keyhole 56a is worn and enlarged as shown in the upper right in the figure. Then, play occurs between the keyhole 56a and the latch key 44, and even if the latch key 44 is rotated 90 degrees as shown in the lower right in the drawing, the rotation of the rotating portion 56 may be less than 90 degrees. Then, the linear motion portion 57 may not be pulled out from the engagement groove 55a of the container body 5 and the engagement may not be released.
- the latch key 44 is reversely rotated to return to the position where it was inserted into the key hole 56a, and then the engagement is released again.
- the lid opening / closing mechanism 43 is controlled so as to perform an unlatching retry (retry of disengagement) for rotating the latch key 44 by 90 °.
- an unlatching retry retry of disengagement
- the rotating portion 56 becomes difficult to rotate in accordance with the latch key 44, and the number of times of performing the unlatching retry increases.
- the engaging portion 52 of the carrier C is deformed. Then, when the engagement between the claw 38 and the engaging portion 52 is formed and when the engagement is released, the frictional force acting between them changes. Due to the influence, the clamp time until the hook 38 moves from the unlock position to the lock position and the unclamp time until the hook 38 moves from the lock position to the unlock position change. Since the apparatus controller monitors the time required for the predetermined rotation of the motor as described above, it is possible to acquire these clamping time and unclamping time.
- the stage 32 is moved to move the carrier C to the loading position as described above.
- the carrier C comes into contact with the housing 31 and the load on the motor of the stage moving mechanism 35 increases.
- the stage 32 is moved until the torque value changes.
- the time for the carrier C to move from the load position to the unload position is the undock time
- the time for the carrier C to move from the unload position to the load position is the dock time.
- the concave portion 51 of the carrier C is worn and enlarged, so that it is difficult to be fitted to the pin 36 of the stage 32, and the clamp mechanism 37 is placed on the stage 32.
- the position where the carrier C is fixed changes. That is, since the position of the carrier C on the stage 32 changes, the dock time and the undock time change. These dock time and undock time are also acquired by the apparatus controller 2.
- the device controller 2 includes a program storage unit 21, a CPU 22, and a memory 23, and these are connected to a bus 24.
- the load port 3 is also connected to the bus 24.
- the program storage unit 21 is configured by a computer storage medium such as a storage medium such as a flexible disk, a compact disk, a hard disk, an MO (magneto-optical disk), and a memory card.
- the program 25 stored in the storage medium is installed in the device controller 2 while being stored in such a storage medium.
- the program 25 that constitutes a determination unit transmits a control signal to each part of the coating and developing apparatus 1 to control its operation, transfer the wafer W, process the wafer W in each of the blocks E1 to E3, and handle the wafer from the carrier C. Instructions (steps) are incorporated so that each operation of unloading W and loading wafer W into carrier C can be performed.
- the CPU 22 performs various calculations in order to output the control signal as described above.
- the memory 23 stores the ID number (identification information) of the carrier C as schematically shown in the figure, and is represented by 1 to n (n is a natural number) in the example of the figure.
- the memory 23 is provided with the apparatus controller 2, and a clamping time, which is a parameter of the time acquired for the carrier C when the carrier C loading process and the unloading process are performed for the developing apparatus 1,
- the unclamp time, dock time, and undock time are stored in association with the ID number of the carrier C.
- the number of unlatch retries described above is also stored in association with this ID number.
- allowable values are set for the clamp time, the unclamp time, the dock time, the undock time, and the number of unlatch retries, and the allowable values are stored in the memory 23.
- the torques of the motors of the stage moving mechanism 35, the clamp mechanism 37, and the lid opening / closing mechanism 43 which are parameters detected during the loading process and unloading process of the carrier C, Similar to the number of unlatch retries and the like, it is stored in the memory 23 in association with the ID of the carrier C.
- the use count of 1 means that the load process and the unload process are each performed once in any apparatus of the substrate processing system 200. That is, if the m-th (m is an integer) load process and unload process are performed by the coating and developing apparatus 1, the parameters at the (m ⁇ 1) th and m + 1th unloading processes are the same as those of the coating and developing apparatus 1.
- the data is acquired by the apparatus in which the carrier C is conveyed one before and one after. That is, parameters acquired by devices other than the coating / developing apparatus 1 are transmitted to the coating / developing apparatus 1 via the host computer 20 and stored in the memory 23 of the coating / developing apparatus 1.
- Each parameter value acquired by the coating and developing apparatus 1 is output to another apparatus via the host computer 20. That is, the parameter values acquired by the loading process and unloading process of the carrier C are shared between apparatuses constituting the substrate processing system 200.
- data indicating which load port 3 of which apparatus of the substrate processing system 200 is used is also stored in the memory 23 in association with the number of times of use. That is, when a load process and an unload process are performed on one carrier C in one apparatus, the apparatus controller 2 of the apparatus transmits the acquired parameter values and data specifying the load port 3 that has performed this process.
- the data indicating how many times the carrier C is used by the load process and the unload process is output to another device.
- the use of the device is output as being A + 1 time.
- the bus 24 is provided with an alarm output unit 26.
- the alarm output unit 26 When it is determined that there is an abnormality with respect to the carrier C according to a flow described later, the alarm output unit 26 notifies the user by displaying the ID of the carrier C on the screen or by outputting the sound. In addition, when it is determined that there is an abnormality with respect to the load port 3, information specifying the load port 3 is similarly notified to the user by screen display or voice output.
- the vertical axis in FIG. 11 indicates the torque of the motor provided in the lid opening / closing mechanism 43, and the torque generated during the release of the engagement between the lid 50 and the container body 5 by rotating the latch key 44. Show. If the unlatch retry is performed, the releasing operation is performed a plurality of times. Here, the torque acquired when the engagement is successfully released is employed. It shows that the value of torque is so large that it goes to the upper side of a vertical axis.
- the horizontal axis in the figure represents the number of times one carrier C is used. The plot of the graph is actually obtained for each use, but here, only a dozen or so times are shown for easy viewing of the graph.
- the rotating portion 56 is deteriorated and damaged, and when the torque is increased to rotate the rotating portion 56, or the linear motion portion 57 is deteriorated and damaged. As a result of the engagement being easily released, the torque may be reduced. The occurrence of such an abnormality is determined from the torque.
- an allowable value for determining the presence or absence of this abnormality is set for each carrier C. If the number of times of use of the carrier C is 50 times or less, it is assumed that the carrier C does not deteriorate, and the average value of the 50 times of the torque is calculated. A value obtained by adding a preset value from the average value is an upper limit value, and a value obtained by subtracting a preset value is a lower limit value. A range from the upper limit value to the lower limit value is an allowable range.
- the calculation of the average value, the upper limit value, and the lower limit value is performed by, for example, the apparatus that has performed the 50th loading process, and the calculated values are calculated.
- the apparatus controller 2 of the coating and developing apparatus 1 receives each calculated value from another apparatus or calculates it by itself, and the acquired calculated value is stored in the memory 23 described above.
- the carrier C (for convenience of explanation) in which the average value, the upper limit value, and the lower limit value are set in the load port 3 of the coating and developing apparatus 1 as described above.
- Carrier C1 is conveyed, and the detected torque is an abnormal value outside the allowable range.
- the device controller 2 sets k (k is an integer, k> 50), which is a preset reference frequency. It is judged whether or not it exceeds. That is, if the number of uses s exceeds the reference number k, it is determined that there is an abnormality in the carrier C1.
- the reference number k is 10,000 times or more, but this is an example.
- the device controller 2 determines whether or not the torque has an abnormal value when the carrier C1 is used s-1 times, s-2 times,..., Sp times before s times. judge.
- the p is an integer set in advance. That is, it is determined whether or not the torque is abnormal even when transported to an apparatus other than the coating and developing apparatus 1. If all the s-1 to sp torques are abnormal values, it is determined that the carrier C1 is abnormal.
- a load process and an unload process of a plurality of q carriers C (referred to as carrier C2 for convenience of explanation) transported immediately before the carrier C1 were performed.
- carrier C2 for convenience of explanation
- Q is an integer set in advance. That is, in the load port 3, it is determined whether or not the torque is abnormal even when another carrier is handled.
- the device controller 2 determines that the load port 3 has an abnormality.
- the abnormality determination of the carrier C1 is not performed. Further, when any of the q carriers C2 is normal, the abnormality of the load port 3 is not determined.
- the torque of the motors of the stage moving mechanism 35, the clamp mechanism 37, and the opening / closing door 4 is calculated and the upper limit value and the lower limit value, which are allowable values, are set based on the average value. Based on this allowable value, a determination is made as to whether or not there is an abnormality in the load port 3 and a determination as to whether or not some abnormality has occurred in the carrier C.
- the torque of the motor of the open / close door 4 can change, and the engaging portion of the container main body 5 can be changed.
- transforms the torque of the motor of the clamp mechanism 37 may change.
- the opening edge 55 of the container body 5 is greatly deformed and contacts the floor surface while the stage 32 is moving, the torque value of the motor of the stage moving mechanism 35 can change. That is, the abnormality of each part of the carrier C is reflected as the torque of these motors. Therefore, by acquiring the torques of these motors and comparing the acquired torques with the allowable values as described above, the carrier C abnormality can be determined.
- FIG. 12 is a graph showing an example of the relationship between the number of uses of one carrier C and the clamping time.
- the clamp time (unit: second) is set on the vertical axis of the graph, and the number of uses of the carrier C is set on the horizontal axis.
- the carrier C is an abnormal carrier.
- the allowable value is set, for example, by calculating an average value of 50 clamp times of one carrier C and adding a predetermined value to the average value, as with the above-described upper limit value for torque.
- the apparatus controller 2 determines that the number of uses of this carrier C (for convenience of explanation, carrier C3) is t-1 to tp times before t times. In addition, it is determined whether or not the clamp time exceeds an allowable value. As shown in FIG. 13, in any of the processes at the number of times of use, when the clamp time exceeds the allowable value, the apparatus controller 2 determines that the carrier C3 is abnormal. If any of the values does not exceed the allowable value, the abnormality of the carrier C3 is not determined.
- carrier C for convenience of explanation, carrier C3
- a load process and an unload process of a plurality of q carriers C conveyed immediately before the carrier C1 were performed.
- carrier C4 for convenience of explanation
- the abnormality of the carrier C and the error can be similarly determined based on each of the unclamp time, the dock time, the undock time, and the number of unlatch retries instead of the clamp time.
- An abnormality determination of the load port 3 is performed.
- the determination of the device controller 2 described so far is performed using past transition data of parameter values already acquired in the memory 23.
- the past transition data of the parameter value includes not only the time-series data of the parameter value but also the number of times used so far, the past average value of the parameter value, and the like as described above.
- the device controller 2 of the coating / developing apparatus 1 acquires the ID of the carrier C transported to the coating / developing apparatus 1 transmitted from the host computer 20 (step S1), and then the carrier having the ID. C is transported to the unload position by the carrier transport mechanism 12. As described with reference to FIG. 4, the claw 38 of the clamp mechanism 37 moves from the unlock position to the lock position, and the carrier C is fixed to the stage 32. The clamping time required for this movement and the torque of the motor of the clamping mechanism 37 are acquired (step S2).
- step S3 the carrier C is moved to the load position by the stage moving mechanism 35 as shown in FIG. 7, and the torque of the motor of the stage moving mechanism 35 and the dock time required for this movement are acquired (step S3).
- the lid opening / closing mechanism 43 moves from the standby position to the lid delivery position, the latch key 44 is inserted into the key hole 56a of the rotating portion 56 of the lid 50, the latch key 44 rotates, and the container body 5 and the lid 50 is disengaged. If the engagement release fails, an unlatching retry is performed, and this unlatching retry is repeated until the engagement is released.
- the number of retries and the torque of the motor of the lid opening / closing mechanism 43 when the engagement is released are acquired (step S4).
- the transfer port 33 is opened, and the transfer mechanism 16 transfers the wafer W in the carrier C to the processing block E2.
- the open / close door 4 returns from the open position to the closed position, and the transfer port 33 is closed.
- the latch key 44 rotates to engage the lid 50 and the container body 5, and the torque of the motor of the lid opening / closing mechanism 43 is acquired.
- the carrier C is moved to the unload position by the stage moving mechanism 35, and the undock time required for this movement and the torque of the motor of the stage moving mechanism 35 are acquired (step S5).
- step S6 the unclamping time that is the time required for this movement and the torque of the motor of the clamp mechanism 37 are acquired.
- the carrier C is transported to the next apparatus by the carrier transport mechanism 12.
- acquisition of parameters for various times, acquisition of torque, and acquisition of the number of unlatching retries are performed by the apparatus controller 2 as described above. Further, these acquired parameters are transmitted to another device via the host computer 20.
- the device controller 2 determines whether any one of the clamp time, unclamp time, dock time, and undock time acquired for the carrier C exceeds an allowable value set for each of these time parameters. Determination is made (step S7). If it is determined that there is no time parameter that exceeds the allowable value, it is determined whether or not the number of unlatch retries exceeds the allowable value (step S8). If it is determined that the number of unlatch retries does not exceed the allowable value, it is determined whether there is an abnormal value among the acquired torque values (step S9). When it is determined that none of the torque values is an abnormal value, it is determined that the carrier C and the load port 3 are also normal (step S10).
- step S7 If it is determined in step S7 that some of the acquired time parameters exceed the allowable value, whether the number of times of use of the carrier C exceeds the set reference number as described with reference to FIGS. Determine whether or not. If the reference number of times is not exceeded, the parameter for the time of this carrier C continues to exceed the allowable value in a plurality of other recently loaded load ports, or the load port handling this carrier C In step S11, it is determined whether or not the parameter of the time exceeds the allowable value when the other carrier C is recently handled (step S11).
- step S12 when it is determined that the carrier C or the load port 3 is abnormal as such, an alarm indicating that is output (step S13). The user of the substrate processing system 200 repairs the load port 3 or discards the carrier C based on the alarm.
- step S11 the number of times the carrier C has been used does not exceed the reference number, and for the carrier C, the time parameter does not continuously exceed the allowable value.
- the parameter does not exceed the allowable value, it is determined that neither the carrier C nor the load port 3 is abnormal according to step S10.
- step S11 is executed in the same manner as when the time parameter exceeds the allowable value even if any of the torques acquired in step S9 exceeds the allowable range. . That is, whether or not the number of times of use of the carrier C whose parameter has become abnormal in this way exceeds the reference number, or whether or not the same abnormality is continuously detected in other devices to which the carrier C has been recently transported. It is also determined whether the same abnormality has been continuously detected when another carrier C is recently handled at the load port 3 of the developing / developing apparatus 1 in which the carrier C is handled. Based on the determination, it is determined whether or not there is an abnormality in the carrier C (steps S11 and S12).
- step S13 If it is determined that there is an abnormality, an alarm is output (step S13).
- the operation of one application / development apparatus 1 is described. However, operations similar to those of the application / development apparatus 1 are performed in other apparatuses constituting the substrate processing system 200. For example, it is performed in parallel.
- the load port at the time of the loading process for loading the carrier C into the apparatus and at the time of the unloading process for unloading the carrier C from the apparatus based on the ID number of the carrier C 3, the operation time of each part such as the stage 32, the number of unlatch retries when the lid 50 is removed, and the number of times of use of the carrier C are associated with each other and stored in the memory 23.
- the abnormality of the carrier C is determined based on the various parameters obtained at that time and the data already acquired in the memory 23. As a result, it is possible to detect an abnormality of the carrier C at an early stage and prevent a situation in which the semiconductor manufacturing process is stopped due to the malfunction of the carrier C.
- the parameters acquired during the loading and unloading processes of one apparatus are acquired during the loading and unloading processes of the other apparatus. It can be compared with parameters. Therefore, if the parameter acquired during the loading and unloading process of one device is abnormal, it can be identified whether it is due to the abnormality of the carrier C or the abnormality of the load port 3. Thereby, the presence or absence of abnormality of the carrier C can be determined with high accuracy, and further, the abnormality of the load port 3 can be performed at an early stage.
- each determination in the above flow has been described as being performed by the device controller 2, it may be performed by the host computer 20.
- the determination process may be shared so that the apparatus controller 2 performs a certain determination process and the host computer 20 performs another determination process.
- a memory 23 for storing parameter value transition data may also be provided in the host computer 20 instead of being provided in the apparatus controller 2.
- the device controller 2 transmits a control signal, and each part of the carrier block E1 automatically operates and parameters are acquired as described above.
- the user of the device receives the carrier block E1 from the device controller 2.
- the above-mentioned parameters may be acquired when each part is manually operated and each part operates by this operation.
- the host computer 20 transmits data to the coating and developing apparatus 1 regarding the number of times the carrier C is used.
- the apparatus controller 2 of the coating / developing apparatus 1 stores the number of times of use and the torque of each motor acquired at the time of loading and unloading in the memory 23 in association with each other as in the above embodiment.
- an average value of torque is calculated for one carrier C, and an allowable range is set.
- the average value is calculated from data acquired when the number of times of use of the carrier C stored in the memory 23 is, for example, 50 times or less as in the above example.
- the drive mechanism for driving each part of the load port 3 is not limited to a motor.
- an air cylinder or the like may be used instead of the motor, and the pressure of the air cylinder may be detected instead of the torque.
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Abstract
Description
Claims (13)
- 容器本体の前面の基板取り出し口が蓋体により気密に塞がれ、複数の基板を収納して搬送するための搬送容器から基板を取り出して処理する基板処理装置において、
前記搬送容器が搬入及び搬出されるロードポートと、
前記ロードポートにおける操作を制御する装置コントローラと、を備え、
前記装置コントローラは、
搬送容器の識別符号に基づいて外部から送られてきたパラメータ値の推移データを記憶する記憶部であって、前記パラメータ値の推移データとは、当該搬送容器の使用回数と、ロードポートに前記搬送容器を搬入して蓋体を取り外すために行った操作及び当該搬送容器をロードポートから搬出するために行った操作のうち少なくとも一方の操作の結果を数値化したパラメータ値とを対応付けたものである、記憶部と、
当該基板処理装置のロードポートに搬送容器が搬入された後、当該搬送容器の搬入及び搬出のうち少なくとも一方に伴う前記パラメータ値と、当該搬送容器にかかる前記パラメータ値の過去の推移データと、に基づいて当該搬送容器の異常の有無を判定する判定部と、
を備えたことを特徴とする基板処理装置。 - 前記パラメータ値は、搬送容器を載置部に載置した後、搬送容器の蓋体を取り外す位置まで移動させるための駆動に関する値、及び蓋体を取り外すために蓋体のロック状態を解除する操作のやり直し回数のうちの少なくとも一方であることを特徴とする請求項1記載の基板処理装置。
- 前記判定部は、使用回数が設定値を越えた搬送容器について取得された前記パラメータ値が異常であるときに、当該搬送容器に異常が有る判定を行うことを特徴とする請求項1記載の基板処理装置。
- 容器本体の前面の基板取り出し口が蓋体により気密に塞がれ、複数の基板を収納して搬送するための搬送容器が搬入及び搬出されるロードポートと、このロードポートに搬入された搬送容器から取り出された基板を処理するための基板処理部と、前記ロードポートにおける操作を制御する装置コントローラと、を各々備えた複数の基板処理装置と、
前記複数の基板処理装置の各々と通信を行うホストコンピュータと、
を備え、
前記ホストコンピュータは、
搬送容器の識別符号に基づいて外部から送られてきたパラメータ値の推移データを記憶する記憶部であって、前記パラメータ値の推移データとは、当該搬送容器の使用回数と、ロードポートに前記搬送容器を搬入して蓋体を取り外すために行った操作及び当該搬送容器をロードポートから搬出するために行った操作のうち少なくとも一方の操作の結果を数値化したパラメータ値とを対応付けたものである、記憶部と、
基板処理装置のロードポートに搬送容器が搬入された後、当該搬送容器の搬入及び搬出のうち少なくとも一方に伴う前記パラメータ値と、当該搬送容器にかかる前記パラメータ値の過去の推移データと、に基づいて当該搬送容器の異常の有無を判定する判定部と、を備えたことを特徴とする基板処理システム。 - 前記パラメータ値は、搬送容器を載置部に載置した後、搬送容器の蓋体を取り外す位置まで移動させるための駆動に関する値、及び蓋体を取り外すために蓋体のロック状態を解除する操作のやり直し回数のうちの少なくとも一方であることを特徴とする請求項4記載の基板処理システム。
- 前記判定部は、使用回数が設定値を越えた搬送容器について取得された前記パラメータ値が異常であるときに、当該搬送容器に異常が有る判定を行うことを特徴とする請求項4記載の基板処理システム。
- 前記判定部は、一の基板処理装置のロードポートにおいて使用回数が設定値以下である一の搬送容器について取得された前記パラメータ値が異常であるときに、当該一の搬送容器よりも前に当該ロードポートに搬入された他の搬送容器から取得されたパラメータ値の異常の有無に基づいて、当該ロードポートの異常の有無を判定することを特徴とする請求項4記載の基板処理システム。
- 前記判定部は、一の基板処理装置のロードポートにおいて使用回数が設定値以下である搬送容器について取得された前記パラメータ値が異常であるときに、当該搬送容器が前記一の基板処理装置に搬送される前に搬送された他の基板処理装置にて取得された前記パラメータ値の異常の有無に基づいて、前記搬送容器の異常の有無を判定することを特徴とする請求項4記載の基板処理システム。
- 容器本体の前面の基板取り出し口が蓋体により気密に塞がれ、複数の基板を収納して搬送するための搬送容器の異常を検出する方法において、
前記搬送容器から取り出された基板を処理する基板処理装置のロードポートに搬送容器を搬入する工程と、
前記ロードポートから搬送容器を搬出する工程と、
搬送容器の識別符号に基づいて外部から送られてきたパラメータ値の推移データであって、当該搬送容器の使用回数と、ロードポートに前記搬送容器を搬入して蓋体を取り外すために行った操作及び当該搬送容器をロードポートから搬出するために行った操作のうち少なくとも一方の操作の結果を数値化したパラメータ値とを対応付けたものである前記パラメータ値の推移データを記憶する工程と、
前記パラメータ値の推移データに基づいて搬送容器の異常の有無を判定する工程と、
を含むことを特徴とする搬送容器の異常検出方法。 - 前記パラメータ値は、搬送容器を載置部に載置した後、搬送容器の蓋体を取り外す位置まで移動させるための駆動に関する値、及び蓋体を取り外すために蓋体のロック状態を解除する操作のやり直し回数のうちの少なくとも一方であることを特徴とする請求項9記載の搬送容器の異常検出方法。
- 前記搬送容器の異常の有無を判定する工程は、使用回数が設定値を越えた搬送容器について取得された前記パラメータ値が異常であるときに、当該搬送容器に異常が有る判定を行うことを特徴とする請求項9記載の搬送容器の異常検出方法。
- 一の基板処理装置のロードポートにおいて使用回数が設定値以下である一の搬送容器について取得された前記パラメータ値が異常であるときに、当該一の搬送容器よりも前に当該ロードポートに搬入された他の搬送容器から取得されたパラメータ値の異常の有無に基づいて、当該ロードポートの異常の有無を判定する工程を含むことを特徴とする請求項9記載の搬送容器の異常検出方法。
- 前記搬送容器の異常の有無を判定する工程は、一の基板処理装置のロードポートにおいて、使用回数が設定値以下である搬送容器について取得された前記パラメータ値が異常であるときに、当該搬送容器が前記一の基板処理装置に搬送される前に搬送された他の基板処理装置にて取得された前記パラメータ値の異常の有無に基づいて、前記搬送容器の異常の有無を判定する工程を含むことを特徴とする請求項9記載の搬送容器の異常検出方法。
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JP2002164411A (ja) * | 2000-09-14 | 2002-06-07 | Hirata Corp | Foupオープナ |
JP2003224182A (ja) * | 2002-01-28 | 2003-08-08 | Ebara Corp | 基板搬送容器の異常検知装置 |
JP2003315197A (ja) * | 2002-04-26 | 2003-11-06 | Trecenti Technologies Inc | ウエハ収納治具の検査方法および検査装置、ならびに半導体装置の製造方法 |
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US20160172225A1 (en) | 2016-06-16 |
TW201433528A (zh) | 2014-09-01 |
US9773690B2 (en) | 2017-09-26 |
KR101732290B1 (ko) | 2017-05-02 |
CN104854689B (zh) | 2017-03-15 |
JP6024433B2 (ja) | 2016-11-16 |
TWI548576B (zh) | 2016-09-11 |
KR20150093168A (ko) | 2015-08-17 |
CN104854689A (zh) | 2015-08-19 |
JP2014116464A (ja) | 2014-06-26 |
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