JP2019024095A - Coating apparatus, imprint apparatus, and article manufacturing method - Google Patents

Abstract

To provide a coating apparatus capable of taking out an imprinting material containing a foreign substance from a container of the coating apparatus and supplying a new imprint material to the container of the coating apparatus.SOLUTION: A coating apparatus 13 used for supplying an imprint material on a substrate 1 in an imprinting apparatus 100 for forming a pattern on the imprint material on the substrate 1 by using a mold includes an accommodating portion 8 for accommodating the imprint material and an ejecting portion 7 provided in the accommodating portion 8 and ejecting the imprint material of the accommodating portion 8 onto the substrate 1, and can be attached to and detached from the imprint apparatus 100.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an imprint apparatus that forms a pattern on an imprint material on a substrate using a mold, a coating apparatus used therefor, and an article manufacturing method.

  An imprint technique is known as a technique for manufacturing a semiconductor device or the like. The imprint technique is a technique for forming a pattern on an imprint material supplied on a substrate using a mold on which a pattern is formed.

  In the imprint technique, an imprint process is performed for each shot area on the substrate, and a pattern is formed on the substrate using a mold. Conventionally, an imprinting material is supplied to each shot area on a substrate by a coating device provided in the imprinting apparatus to form a pattern.

  In the coating apparatus (dispenser) of Patent Document 1, the discharge port from which the imprint material is discharged and the tank (accommodating portion) for storing the imprint material are arranged at positions separated from each other. Therefore, the imprint material reaches the discharge port from the tank through the supply path, and is supplied from the discharge port onto the substrate.

JP 2011-91104 A

  When the imprint material in the tank is replaced with an imprint material of a different material, or when foreign matter enters the imprint material, the imprint material in the tank and the supply path is taken out and the tank and the supply path are cleaned. After that, a new imprint material had to be replenished. Therefore, the conventional coating apparatus cannot be easily replaced with a new imprint material.

  The coating apparatus of the present invention is a coating apparatus used for supplying the imprint material onto the substrate in an imprint apparatus that forms a pattern on the imprint material on the substrate using a mold, A storage unit that stores the material; a discharge unit that discharges the imprint material stored in the storage unit onto the substrate; and a circulation pump, which is discharged from the discharge unit of the storage unit by the circulation pump A circulation device capable of filtering the imprint material with a filtration filter and returning the imprint material from a supply unit to the accommodation unit, and the accommodation unit, the discharge unit, and the circulation device include the imprint device. It is a cartridge type coating device that can be attached and detached as a unit.

  It is possible to provide a coating apparatus that can be easily exchanged for an imprint material of a different material or can be exchanged for an imprint material in which no foreign matter is mixed.

The figure which shows the structure of the imprint apparatus in 1st Embodiment. The figure which shows the mechanism of the coating device in 1st Embodiment. The figure which shows the structure of the imprint apparatus in 1st Embodiment. The figure which shows the imprint operation | movement in 1st Embodiment. The figure which shows the resin circulation apparatus and resin tank in 1st Embodiment The figure which shows the resin circulation apparatus and resin tank in 1st Embodiment The figure which shows the detail of the resin circulation apparatus in 1st Embodiment. The figure which shows the detail of the resin circulation apparatus in 2nd Embodiment The figure which shows the detail of the resin circulation apparatus in 3rd Embodiment The figure which shows the detail of the coating device in 4th Embodiment The figure which shows the detail of the resin filtration apparatus in 5th Embodiment The figure which shows the sequence at the time of filtering resin in 6th Embodiment

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in each figure, the same reference number is attached | subjected about the same member and the overlapping description is abbreviate | omitted.

(First embodiment)
(Imprint device)
The imprint apparatus 100 will be described with reference to FIG. In the description of the first embodiment, the axis on which the substrate 1 (silicon wafer, glass plate) is arranged is defined as the XY plane, and the direction perpendicular to the XY plane is defined as the Z direction. Here, an imprint apparatus 100 to which a photo-curing type that cures an imprint material by irradiation with light (ultraviolet light) is applied will be described. An ultraviolet curable resin (resin, resist) is used as the imprint material. However, the present invention is an imprint apparatus that cures an imprint material by irradiating light in a wavelength region different from ultraviolet light, or an imprint apparatus that cures a resin with other energy (for example, thermal energy). May be.

  The imprint apparatus 100 can form patterns in a plurality of shot regions of the substrate 1 by repeating the imprint cycle. Here, in one imprint cycle, the resin is cured in a state where the resin applied to the substrate 1 and the mold 5 (original plate, mold, template) are in contact with each other, and a pattern is formed on one shot region on the substrate 1. Is a cycle to form. The imprint apparatus 100 forms an element pattern corresponding to the pattern of the mold 5 on the surface of the substrate 1 by transferring the pattern formed on the mold 5 to the resin of the substrate 1.

  The imprint apparatus 100 includes a substrate stage that holds and moves the substrate 1. The substrate stage is provided with a fine movement stage 2 that can drive the substrate 1 by a minute amount in the XY direction and the rotational direction in the XY plane, and a coarse movement stage 3 that greatly moves the substrate 1 in the XY direction. Further, the imprint apparatus 100 includes a base frame 4 that holds the substrate stage (the fine movement stage 2 and the coarse movement stage 3).

  The mold 5 having a concavo-convex pattern formed on the surface is held by a driving device 5a. The driving device 5a is a driving device that drives the mold 5 to move up and down (move in the Z direction), and contacts (imprints) or releases (releases) the resin 5 coated on the substrate 1 with the mold 5. Take action. Here, the imprint apparatus 100 in which the mold 5 is moved and brought into contact with the resin has been described. However, the substrate stage may be moved up and down to bring the mold 5 and the resin into contact with each other. May be moved to bring the mold 5 into contact with the resin.

  The light source 6 is a device that irradiates ultraviolet light (ultraviolet light generator), and irradiates the resin with ultraviolet light in a state where the mold 5 and the resin are in contact with each other. The resin is cured when irradiated with ultraviolet rays. The light source 6 includes, for example, a halogen lamp that generates i-line and g-line, and an optical element having a function of collecting and shaping the generated light.

  The alignment scope 11 detects the alignment mark formed on the mold 5 and the alignment mark formed on the substrate 1. Based on the detected alignment mark detection result, the imprint apparatus drives the substrate stage and the driving device 5a to align the substrate 1 and the mold 5 with each other. The driving device 5a, the light source 6, and the alignment scope 11 are supported by the surface plate 12.

  The imprint apparatus 100 includes an application device 13 (dispenser) for applying a resin onto the substrate 1. The coating device 13 includes a nozzle 7 (discharge unit) for discharging resin and a resin tank 8 (storage unit) for storing resin. The coating device 13 of the first embodiment is a cartridge type coating device 13 in which the nozzle 7 and the resin tank 8 are integrated. The coating device 13 is detachably attached to the imprint apparatus 100. The resin tank 8 of the coating device 13 is held by the movable part 9. By driving the movable portion 9 by the movable portion driving means 10, the nozzle 7 and the resin tank 8 can be moved between the discharge position and the retracted position.

  FIG. 2 shows the coating apparatus 13 and the mold 5 when the imprint apparatus 100 is viewed from the substrate stage side (−Z direction). The nozzle 7 has a plurality of discharge ports. The coating device 13 supplies resin from the resin tank 8 to the discharge port of the nozzle 7 and discharges the resin onto the substrate 1 from the discharge port. The nozzle 7 of the coating device 13 has, for example, a piezo-type ink jet head including a plurality of ejection openings. In order to control the application position and the application amount of the resin supplied from the coating device 13 onto the substrate 1, for example, a piezoelectric element (piezo element) is provided at the discharge port, and based on an operation command from the control unit C, Control the piezo elements. The coating apparatus 13 of this embodiment is attached to the imprint apparatus 100 so that attachment or detachment is possible. Therefore, the coating device 13 is provided with wiring for transmitting a control signal from the control unit C to the piezo element and contact terminals (not shown) connected to the imprint device 100. When the coating device 13 is at the discharge position, the resin is discharged onto the substrate 1, and when it is at the retracted position, the resin is supplied to the resin tank 8 and the resin is taken out from the resin tank 8 as described later. Further, since the coating device 13 is detachably attached to the imprint device 100, when the coating device 13 is in the retracted position, the cartridge type coating device 13 can be detached from the movable portion 9, and other coating devices can be removed. 13 can be exchanged.

  FIG. 3 shows the resin circulation device 14 provided in the imprint apparatus 100. The resin circulation device 14 functions as a resin storage unit that stores new resin supplied to the resin tank 8. The resin circulation device 14 is provided in the vicinity of the retracted position of the coating device 13. The resin circulation device 14 may have a function of taking out the resin from the resin tank 8 in addition to supplying the resin to the resin tank 8. Further, the resin circulation device 14 may have a function of removing foreign matters (particles) contained in the resin taken out from the resin tank 8. The resin circulation device 14 may be included in the coating device 13.

(Imprint operation)
Next, the imprint operation of the first embodiment will be described with reference to FIG. The imprint apparatus 100 includes a control unit C. The control unit C includes a memory that stores a program that controls the operation of the imprint apparatus 100, a processor that executes the program stored in the memory, and the like. A signal for controlling each unit constituting the imprint apparatus 100 is output according to the executed program.

  First, the substrate 1 is carried into the imprint apparatus 100, and the substrate 1 is mounted on the substrate stage (fine movement stage 2, coarse movement stage 3) (FIG. 4A).

  The substrate 1 held on the substrate stage moves below the nozzle 7 at the discharge position of the coating apparatus 13. While moving the substrate 1 by the substrate stage, a predetermined amount of resin is discharged from the nozzle 7 to apply the resin to the shot region on the substrate 1 (FIG. 4B).

  A portion (shot region) coated with resin on the substrate 1 is moved under the mold 5. Further, the mold 5 is lowered by the driving device 5a, the mold 5 and the substrate 1 are brought close to each other, and the mold 5 and the resin on the substrate 1 are brought into contact with each other. When the mold 5 and the substrate 1 are brought close to each other, the alignment scope 11 detects the alignment mark on the substrate 1 and the alignment mark on the mold 5. The imprint apparatus 100 aligns the substrate 1 and the mold 5 based on the detection result of the alignment mark detected by the alignment scope 11 (FIG. 4C).

  In a state where the mold 5 and the resin are in contact, the light source 6 emits ultraviolet light 6a. Ultraviolet light 6a from the light source 6 passes through the mold 5 and irradiates the resin (FIG. 4D).

  After the resin is cured, the mold 5 is separated from the cured resin by widening the distance between the substrate 1 and the mold 5 (mold release). Thereby, the pattern of the mold 5 is transferred to the resin on the substrate 1, and the imprint operation is completed.

(Occurrence of pattern defects)
The imprint apparatus 100 can form a pattern on a plurality of shot regions on the substrate 1 or on the plurality of substrates 1 by repeating the above-described imprint operation. When a defect occurs in the pattern formed by the imprint apparatus 100, there is a possibility that foreign matter exists in the resin applied to the substrate 1. Examples of the foreign matter include particles in which the particles adhering to the nozzle 7 and the resin tank 8 are mixed in the resin, those in which the resin in the resin tank 8 is denatured and gelled, and a part of the resin is cured and solid particles There are things that became.

  As described above, when a foreign matter is generated in the resin in the resin tank 8, it is necessary to replace the coating device 13 with a resin in which the foreign matter is not mixed. By preparing a cartridge-type coating device 13 containing a resin in which foreign matter is not mixed, the cartridge-type coating device 13 containing a resin in which foreign matter is mixed can be removed and easily replaced with a new coating device 13. Can be exchanged. Further, even when the resin in the resin tank 8 runs out, it can be replaced with a new coating device 13. Furthermore, when supplying different types of resin onto the substrate 1, the resin can be easily exchanged by preparing a cartridge-type coating device 13 that integrates a discharge port and a container for each resin of different materials. can do.

  On the other hand, the nozzle 7 having a discharge port subjected to fine processing is expensive. Therefore, if a necessary amount of resin is insufficient in the resin tank, if a new resin can be supplied to the resin tank 8, the nozzle 7 can be used efficiently.

  Moreover, the resin used in the imprint technique is expensive. Therefore, when the foreign substance is contained in the resin inside the resin tank 8, if the foreign substance in the resin can be removed, the disposal of the resin can be suppressed.

  Therefore, a case where resin is supplied into the resin tank 8 using the resin circulation device 14 or foreign matter is removed from the resin will be described.

(Resin supply / removal)
FIG. 5 shows a resin tank 8 provided with a resin circulation device 14 and a nozzle 7 provided near the retracted position. The resin circulation device 14 is provided with a supply unit 14 a (first connection unit) for supplying resin to the resin tank 8. The resin tank 8 is provided with a supply port 8a that is connected to the supply unit 14a and through which the resin supplied from the resin circulation device 14 passes. As shown in FIG. 5A, when a new resin is supplied to the resin tank 8 or when a foreign substance in the resin is removed, the nozzle 7 and the resin tank 8 are moved to the retracted position. And the resin circulation device 14 and the resin tank 8 connect in the supply part 14a and the supply port 8a because the resin tank 8 moves to a connection position. Or the supply part 14a and the supply port 8a may connect because the supply part 14a moves.

  A new resin (resin that does not contain foreign matter) is stored in the resin circulation device 14, and the resin is supplied from the resin circulation device 14 into the resin tank 8 through the supply unit 14a and the supply port 8a. The resin circulation device 14 may have a filtration filter, and the resin filtered by the filtration filter can be supplied to the resin tank 8.

  The resin circulation device 14 is not limited to the resin supply, and may have a function of discharging the resin from the resin tank 8 and filtering the resin. When there is a possibility that foreign matter is mixed in the resin in the resin tank 8, the resin in the resin tank 8 is circulated through the supply unit 14a and the supply port 8a in a state where the supply unit 14a and the supply port 8a are connected. Discharge to device 14. After the resin is discharged, a new resin may be supplied to the resin tank 8, or a resin obtained by filtering the discharged resin through a filter may be supplied to the resin tank 8.

  In the first embodiment, the supply unit 14a and the supply port 8a are shared between the case where the resin is discharged from the resin tank 8 and the case where the resin is supplied. Therefore, the resin circulation device 14 is provided with a switching valve, and is switched between a pipe through which the discharged resin passes and a pipe through which the supplied resin passes.

  FIG. 6 shows a resin tank 8 provided with a resin circulation device 14 and a nozzle 7 provided near the retracted position of the coating device 13. The resin circulation device 14 is provided with a supply part 14a (first connection part) for supplying resin to the resin tank 8 and a discharge part 14b (second connection part) for discharging the resin from the resin tank 8. . The resin tank 8 has a supply port 8a through which resin supplied from the resin circulation device 14 is connected to the supply unit 14a, and a discharge port 8b through which resin discharged from the resin circulation device 14 is connected to the discharge unit 14b. Is provided. As shown in FIG. 6A, when removing the foreign matter contained in the resin, the nozzle 7 and the resin tank 8 are moved from the discharge position of the coating device 13 to the retracted position. Further, the nozzle 7 and the resin tank 8 are moved to the filtration position by the movable part driving means 10 as shown in FIG. As the resin tank 8 moves to the filtration position, the resin circulation device 14 and the resin tank 8 are connected to each other at the supply unit 14a, the discharge unit 14b, the supply port 8a, and the discharge port 8b.

  FIG. 7 shows details of the internal configuration of the resin circulation device 14. The supply unit 14 a is connected to a path for supplying resin from the resin circulation device 14 to the resin tank 8. The discharge part 14 b is connected to a path for discharging the resin from the resin tank 8 to the resin circulation device 14. Arrows indicated by dotted lines indicate resin paths.

  Inside the resin circulation device 14 is provided with a filtration filter 14f for removing foreign substances from the resin. By allowing the resin containing foreign matter to pass through the filter 14f, the foreign matter can be removed from the resin. The resin circulation device 14 is provided with a circulation pump 14p for discharging the resin from the resin tank 8 and circulating the route including the filtration filter.

  As shown in FIG. 7, in a state where the resin tank 8 and the resin circulation device 14 are connected, the circulation pump 14p is operated by a power source and a control device (not shown). The resin is discharged (sucked) from the inside of the resin tank 8 by the circulation pump 14p. The discharged resin passes through the filtration filter 14 f and is returned to the resin tank 8 after removing foreign substances contained in the resin. Thereafter, the nozzle 7 and the resin tank 8 are separated from the resin circulation device 14 by the movable part driving means 10 and moved to the discharge position of the coating device 13.

  As described above, by carrying out the step of circulating the resin in the resin tank 8 into the resin circulation device 14, foreign substances contained in the resin existing in the resin tank 8 can be removed. As a result, pattern defects caused by foreign matters contained in the resin can be prevented.

  When connecting to the resin tank 8, the inside of the piping of the resin circulation device 14 is preferably filled with the same resin as that in the resin tank 8. Thereby, it is possible to prevent the resin supplied to the resin tank 8 from containing air in the pipe. Moreover, pressure fluctuations may occur in the resin tank 8 due to the operating pressure of the pump. If pressure fluctuations in the resin tank 8 occur, there is a risk of resin leakage or intrusion of outside air from the discharge port of the nozzle 7. Therefore, in order to prevent resist leakage from the nozzle 7 and intrusion of outside air, the resin tank 8 may be provided with an air opening (vent hole). In this case, an air filter may be provided in the vent hole so that foreign matter does not enter from outside air.

(Second Embodiment)
FIG. 8 shows a resin circulation device 14 included in the coating device 13 of the second embodiment. Since the configuration of the imprint apparatus 100 other than the resin circulation apparatus 14 is the same as that of the first embodiment, the description thereof is omitted. About the same member, the same reference number as 1st Embodiment is attached | subjected. Dotted arrows indicate resin paths.

  The resin circulation device 14 shown in FIG. 8 is a resin circulation device capable of removing air that has entered the internal piping system. Here, a buffer tank 14 t is provided in the piping system of the resin circulation device 14. A circulation pump 14p1 (discharge pump) that moves the resin from the resin tank 8 to the buffer tank 14t, and a circulation pump 14p2 (supply pump) that passes the resin from the buffer tank 14t through the filtration filter 14f and returns to the resin tank 8 are provided. Yes.

  As shown in FIG. 8, the imprint apparatus including the resin circulation device 14 according to the second embodiment is configured such that the circulation pump 14p1 is connected to the resin tank 8 and the resin circulation device 14 by a power source and a control device (not shown). Operate. The resin is discharged (sucked) from the inside of the resin tank 8 by the circulation pump 14p1. The discharged resin is accumulated in the buffer tank 14t. Here, the piping outlet of the resin flowing into the buffer tank 14t is disposed so as to be always higher than the liquid level of the resin in the buffer tank 14t.

  Similarly, by operating the circulation pump 14p2 in a state where the resin tank 8 and the resin circulation device 14 are connected, the resist in the buffer tank 14t is sucked and passed through the filtration filter 14f, and the resin is supplied to the resin tank 8. To do. Here, the suction port connected to the circulation pump 14p2 and sucking the resist in the buffer tank 14t is disposed so as to be always lower than the liquid level of the resin. That is, it is preferable to perform control to suck the resist and stop the suction of the resist when the resist liquid level is lowered to the suction port. Thereby, the air in the piping of the resin circulation device 14 can be extracted.

  In the second embodiment, the case where the resin is discharged from the resin tank 8 and the resin filtered by the filtration filter 14f is returned has been described. However, the step of discharging the resin may be omitted. For example, when the amount of resin in the resin tank 8 decreases, the resin circulation device 14 may be regarded as a resin supply device, and only the resin supply to the resin tank 8 may be performed. In this case, resin is put in the buffer tank 14t in advance, and only the circulation pump 14p2 is operated and supplied into the resin tank 8. If the amount of resin to circulate is insufficient, the resin is put in the buffer tank 14t in advance, and the resin in the buffer tank 14t is supplied to the resin tank 8 when the resin is circulated by the resin circulation device 14. May be.

(Third embodiment)
FIG. 9 shows a resin circulation device 14 included in the coating device 13 of the third embodiment. Since the configuration of the imprint apparatus 100 other than the resin circulation apparatus 14 is the same as that of the first embodiment, the description thereof is omitted. About the same member, the same reference number as 1st Embodiment is attached | subjected. Dotted arrows indicate resin paths.

  The resin circulation device 14 shown in FIG. 9 may include a resin measuring instrument 14m that measures the state of the resin inside. The resin measuring instrument 14m is a resin liquid quality sensor that measures the liquid quality of the resin. For example, the resin liquid quality sensor is a particle counter that measures the amount of foreign matter contained in the resin, a sensor that measures the viscosity of the resin, or the like. Furthermore, the switching valve 14c is provided in the path | route in the resin circulation apparatus 14, and it can switch whether resin is circulated to either the filtration filter 14f or the resin measuring device 14m.

  The imprint apparatus including the resin circulation device 14 of the third embodiment first discharges the resin from the resin tank 8 by operating the circulation pump 14p. The resin discharged from the resin tank 8 passes through the resin measuring instrument 14m by switching the switching valve 14c, and the liquid quality of the resin is measured.

  Here, when the measurement result of the resin measuring instrument 14m satisfies the standard of the liquid quality (the amount of foreign matter), the resin is returned from the resin circulation device 14 to the resin tank 8 through the supply unit 14a as it is.

  On the other hand, when the measurement result does not satisfy the liquid quality standard, the switching valve 14c is switched so that the resin flows through the filtration filter 14f. The circulation pump 14p is operated and the resin returned to the resin tank 8 is discharged again. The resin discharged again is filtered by flowing through the filter 14f, and foreign substances contained in the resin can be removed. The liquid quality of the filtered resin is measured by the resin measuring instrument 14m, and when the measurement result satisfies the prescribed liquid quality, the resin is returned from the resin circulation device 14 to the resin tank 8 via the supply unit 14a.

  If the measurement result of the filtered resin does not satisfy the specified liquid quality, the switching valve 14c is switched so that the resin flows to the filtration filter 14f side, and the resin tank 8 is used until the resin satisfies the specified liquid quality. Filtration is continued by circulating the resin circulation device 14.

  The place where the resin measuring instrument 14m is installed may be anywhere in the resin circulation device 14. For example, you may arrange | position before switching the flow of the resin discharged | emitted from the resin tank 8 with the switching valve 14c. Whether or not the discharged resin needs to be filtered can be measured in advance. Since resin may flow into the resin circulation device 14 and foreign matter may be mixed with the resin, it is desirable to measure the liquid quality of the resin immediately before being supplied to the resin tank 8 as much as possible. Further, a plurality of resin measuring instruments 14m may be provided in the resin circulation device 14.

(Fourth embodiment)
FIG. 10 shows a coating apparatus 13 according to the fourth embodiment. Since the configuration of the imprint apparatus 100 other than the coating apparatus 13 is the same as that of the first embodiment, the description thereof is omitted. About the same member, the same reference number as 1st Embodiment is attached | subjected. Dotted arrows indicate resin paths.

  FIG. 10 shows a coating apparatus 13 according to the fourth embodiment. In the coating device 13 of the fourth embodiment, the resin circulation device 14 described above is directly provided in the resin tank 8. In this embodiment, the resin tank 8, the nozzle 7, and the resin circulation device 14 are combined to form a coating device 13. The resin tank 8 and the resin circulation device 14 are integrated, and the resin inside the resin tank 8 is discharged from the discharge portion 14b by operating the circulation pump 14p. The resin in the resin tank 8 is discharged from the discharge portion 14b by the circulation pump 14p. The discharged resin is filtered by flowing through the filter 14f, and foreign substances contained in the resin can be removed. The resin that has passed through the filter 14f and from which foreign matter has been removed is returned to the resin tank 8 from the supply unit 14a. Since the resin circulation device 14 is integrated with the resin tank 8, the resin in the resin tank 8 can be filtered even when the resin tank 8 is at the discharge position. Since the resin tank 8 and the resin circulation device 14 are integrated, when the resin in the resin tank 8 runs out (a predetermined amount or less), the coating device 13 moves to the retracted position, and the resin circulation device 14 Replace with a new integrated applicator 13. Alternatively, a supply unit for supplying resin into the resin tank 8 may be separately provided, and new resin may be supplied from there to the resin tank 8.

(Fifth embodiment)
FIG. 11 shows a resin circulation device 14 included in the coating device 13 of the fifth embodiment. Since the configuration of the imprint apparatus 100 other than the resin circulation apparatus 14 is the same as that of the first embodiment, the description thereof is omitted. About the same member, the same reference number as 1st Embodiment is attached | subjected.

  The coating apparatus 13 of the fifth embodiment is not provided with the movable portion 9 and the movable portion driving means 10 for moving the nozzle 7 and the resin tank 8 from the discharge position. Instead, a movable connecting portion 21 is configured from the resin circulation device 14 and is driven by the connecting portion driving means 20. The connection part 21 is provided with a supply part 14a and a discharge part 14b. Further, the connecting portion 21 and the main body in which the filter of the resin circulation device 14 is accommodated are connected by a pipe 22, and the resin passes through the inside of the pipe 22, whereby the resin tank 8 and the resin circulation device 14 are connected. The resin can be circulated between them. The pipe 22 includes a pipe through which the resin discharged from the resin tank 8 passes and a pipe through which the resin supplied to the resin tank 8 passes.

  The connection portion 21 of the resin circulation device 14 has moved to the retracted position so that it does not interfere with the substrate stage during a normal imprint operation. As described in the above embodiment, when it is determined that the step of filtering the resin in the resin tank 8 is necessary, the connection portion 21 is moved to the connection position by the connection portion driving means 20 and connected to the resin tank 8. To do. After the resin tank 8 and the connecting portion 21 are connected, the resin is filtered in the same manner as in the above embodiment. The form of the resin circulation device 14 may be any of the above-described embodiments. After the filtration of the resin is completed, the connecting portion 21 is disconnected from the resin tank 8 and the connecting portion driving means 20 moves the connecting portion 21 to the retracted position.

  Further, not only the resin in the resin tank 8 is circulated, but also when the amount of resin in the resin tank 8 is reduced and the resin is refilled in the resin tank 8, the connection portion 21 is connected by the connection portion driving means 20. Can be moved to the connection position and the resin can be supplied via the supply part 14a.

(Sixth embodiment)
In any of the above-described embodiments, whether the resin circulation device 14 filters the resin in the resin tank 8 (filtering step) can be determined based on various parameters of the imprint operation of the imprint apparatus 100. FIG. 12 shows the details of the process for determining whether or not the resin is necessary for filtration.

  In order to determine the possibility that foreign matter has increased in the resin in the resin tank 8, the defect of the pattern formed on the substrate by the imprint operation is measured by a defect inspection apparatus (S1 to S3). The inspection result of the defect inspection apparatus is compared (determined) with a standard value, and if the measurement result exceeds the standard (when there are many defects), a resin filtration step may be performed (S4 to S11). Here, although the resin filtration process will be described using the resin circulation device 14 having the resin measuring instrument 14m described in the third embodiment (FIG. 9), the coating device 13 to be used is not limited thereto.

  First, the resin tank 8 moves to the filtration position and is connected to the resin circulation device 14 (S4). The circulation pump 14p is operated, the resin in the resin tank 8 is discharged, and the liquid quality is measured by the resin measuring instrument 14m (S5). The measurement result of the resin is compared with the standard value (S6). If the liquid quality standard is not satisfied, the resin inside the resin tank is circulated and the resin is filtered with a filter (S7). The filtered resin measures the liquid quality with the resin measuring instrument 14m (S8), and compares the measurement result with the standard value (S9). The resin is circulated until the liquid quality of the resin filtered by the filtration filter satisfies the standard value (S7 to S9).

  When the measurement result of the liquid quality of the resin in S5 satisfies the standard, the discharged resin is supplied again to the resin tank 8 and disconnected from the resin circulation device 14. The resin tank 8 moves to the discharge position of the coating apparatus 13 (S10), and the imprint apparatus performs an imprint operation (S11).

  Moreover, the above-mentioned filtration process counts the number of imprint operations of the imprint apparatus instead of pattern defect measurement (S1 to S3), and performs the resist filtration process when the specified number of times is exceeded. (S21 to S23).

  Furthermore, when a certain time has elapsed since the resin was supplied to the resin tank 8, a resist filtering process may be performed (S31 to S33).

  The configuration of the resin circulation device 14 (FIGS. 7 to 11) described in the above embodiment has been described for the case where the supply port 8a and the discharge port 8b are formed in the resin tank 8, but the supply shown in FIG. Only the mouth 8a may be formed. In this case, since the supply port 8a is used for discharging and supplying the resin, a part of the discharge path and the supply path are shared. Therefore, the resin circulation device 14 is provided with a switching valve for switching between two routes, a discharge route and a supply route.

  In any of the embodiments described above, the imprint apparatus 100 has been described with respect to the form in which one resin circulation device 14 is provided, but a plurality of resin circulation devices 14 may be provided. A plurality of resins may be used in the imprint apparatus 100, and a cartridge type coating apparatus 13 in which the nozzle 7 and the resin tank 8 are integrated may be prepared according to the number of resins. In this case, if the resin circulation device 14 is provided according to the type of resin, the resin can be efficiently filtered.

  Further, the resin circulation device 14 may not be provided in the imprint apparatus 100. When it is necessary to filter the resin of the coating device 13 including the nozzle 7 and the resin tank 8, the resin tank 8 is moved to the retracted position of the coating device, and the coating device 13 is removed from the imprint device 100. The resin in the resin tank 8 is filtered by a resin circulation device outside the imprint apparatus 100. In the meantime, by attaching another coating device, the imprint apparatus 100 can continue the imprint operation, and can suppress a decrease in productivity.

(Product manufacturing method)
In a method for manufacturing a device (semiconductor integrated circuit device, liquid crystal display device, MEMS, etc.) as an article, a pattern is transferred (formed) to a substrate (wafer, glass plate, film-like substrate, etc.) using the above-described imprint apparatus. Includes steps. Further, the manufacturing method may include a step of etching the substrate on which the pattern is transferred. When manufacturing other articles such as patterned media (recording media) and optical elements, the manufacturing method includes other processing steps for processing the substrate to which the pattern has been transferred, instead of the etching step. May be included.

  A semiconductor integrated circuit device is manufactured through a pre-process for forming an integrated circuit on a wafer and a post-process for processing an integrated circuit chip on the wafer manufactured in the pre-process and completing it as a product. The pre-process includes a step of transferring the pattern of the mold to the resin on the substrate using the above-described imprint method or imprint apparatus. The post-process includes an assembly process (dicing and bonding) and a packaging process (encapsulation). A liquid crystal display device is manufactured through a process of forming a transparent electrode. The process of forming a transparent electrode includes a process of applying a resin to a glass substrate on which a transparent conductive film is deposited, and a mold pattern on the glass substrate on which the resin is applied using the imprint method or imprint apparatus described above. A transfer step. According to the method for manufacturing an article of the present embodiment, a high-quality device can be manufactured at a lower cost than before.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

1 substrate 5 type 7 nozzle 8 resin tank 14 resin circulation device 14p circulation pump 14t buffer tank 14f filtration filter 14m resin measuring instrument

The coating apparatus of the present invention is a coating apparatus used for supplying the imprint material onto the substrate in an imprint apparatus that forms a pattern on the imprint material on the substrate using a mold, A storage unit that stores the material, a discharge unit that discharges the imprint material stored in the storage unit onto the substrate , and a circulation device that includes a circulation pump. the imprint material, after discharged from the discharge portion into which the housing part has, filtered through the filtration filter is from the supply portion having the receiving portion can be returned to supply in the housing unit, the housing part The discharge unit and the circulation device are cartridge-type coating devices that can be attached to and detached from the imprint device as a unit.

Claims (10)

In an imprint apparatus for forming a pattern on an imprint material on a substrate using a mold, the coating device is used to supply the imprint material on the substrate,
An accommodating portion for accommodating the imprint material;
A discharge unit that discharges the imprint material stored in the storage unit onto the substrate;
A circulation device having a circulation pump, and capable of filtering the imprint material discharged from the discharge portion of the storage portion by a filtration filter by the circulation pump and returning the imprint material from the supply portion to the storage portion. Have
The coating device, wherein the storage unit, the discharge unit, and the circulation device are cartridge-type coating devices that are detachable as a unit with respect to the imprint device.   The discharge unit, the circulation pump, the filtration filter, and the supply unit are provided in this order in a direction in which the imprint material circulates and flows inside the circulation device. The coating apparatus as described.   The said discharge part and the said supply part are the coating devices of Claim 1 or 2 provided in the same one side surface of the said accommodating part.   The defect of the pattern formed on the said board | substrate with an imprint apparatus is measured, and the necessity of filtration of the imprint material of the said accommodating part by the filtration filter of the said circulation device is calculated | required from the measurement result. 2. The coating apparatus according to item 1.   4. The method according to claim 1, wherein the number of times the pattern is formed on the substrate is measured by an imprint apparatus, and the necessity of filtering the imprint material of the housing portion by a filtration filter of the circulation device is obtained from the measurement result. The coating device according to item.   The time which the said imprint material was accommodated in the said accommodating part is measured, and the necessity of filtration of the imprint material of the said accommodating part by the filtration filter of the said circulation device is calculated | required from the measurement result. The coating device according to item.   The movable part has a movable part that can be moved by being driven by a movable part driving means, and the storage part, the discharge part, and the circulation device are provided in the movable part. The coating apparatus as described in.   The coating apparatus according to claim 1, wherein the discharge unit includes a piezoelectric element, and the imprint material is discharged onto the substrate by the piezoelectric element. An imprint apparatus for forming a pattern on an imprint material on a substrate using a mold,
An application device for applying an imprint material on the substrate;
The imprinting apparatus according to claim 1, wherein the coating apparatus is the coating apparatus according to claim 1. Forming a pattern on a substrate using the imprint apparatus according to claim 9;
And a step of processing the substrate on which the pattern is formed in the step.

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