JP2016068412A - Pad printing transfer pad, pad printing device, and pad printing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printing transfer pad, a pad printing device, and a pad printing method capable of forming a wiring pattern with a large film thickness on the printed body of a three-dimensional shape.SOLUTION: A transfer article 43 is subjected to patterning by a screen printing method in a state where a blanket 11 is held flat on the holding surface 121 of a stage 12. Thus, a wiring pattern can be formed with a large film thickness on the blanket 11. By supplying a fluid 145 to a space between the blanket 11 and the stage 12 and transferring the transfer article 43 which is a wiring pattern to a transferred body 31 in the expanded and deformed state of the blanket 11, the transferred body 31 can be accurately transferred even when it has a three-dimensional shape.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a transfer pad for pad printing, a pad printing apparatus, and a pad printing method.

  In recent years, antennas built in mobile phones, smartphones, and the like have been used in a three-dimensional shape. As a method of forming such a three-dimensional antenna, a method of integrally molding a sheet metal and a resin is used. However, this method requires an expensive mold. In addition, since mobile phones and smartphones have a short model change cycle, the shape of the built-in antenna is frequently changed. Therefore, creating a mold that conforms to a new antenna shape every time a model change results in hindering cost reduction of the final product.

  In addition, formation of a three-dimensional antenna without using a mold is also known, and is performed, for example, by a technique called Laser-Direct-Structuring (LDS) method. The LDS method uses a material in which a filler and an organic metal are mixed in a base polymer, and after molding into a desired shape, the laser exposure machine is used to expose the antenna shape and deposit plating only on the exposed area. Then, circuit formation (antenna formation) is performed. There is an advantage in that an expensive mold is not used, but there is a problem that it takes time to form a film and high throughput cannot be achieved because electroless plating is used for the plating process.

  Also, a pad printing method is known as a technique for printing a pattern on a three-dimensional substrate (Patent Document 1). Patent Document 1 describes that a transferred material is transferred to a transfer target using a transfer pad made of a flexible elastic material, and by providing a restricting portion that restricts deformation of the transfer pad, Even if the transfer surface of the transfer object has a stepped shape, an accurate pattern can be transferred to the entire transfer surface.

JP 2013-198996 A

  However, the LDS method has a problem that not only high throughput can be achieved, but also an apparatus for performing the plating process is expensive, resulting in high cost.

  On the other hand, in the method of Patent Document 1, it is possible to print a pattern on a three-dimensional substrate by an inexpensive method. For example, when printing is performed using metal ink as a printing material, the printed film thickness is thin. Therefore, it is difficult to obtain a wiring pattern having a low resistance value, and there is a possibility that the quality of the final product is deteriorated.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a pattern printing apparatus and pattern printing that enable printing with a thick film thickness on a three-dimensional structure to be printed using a printing technique and form a wiring pattern by the printing. It aims to provide a method.

  The transfer pad according to the first aspect is a transfer pad for pad printing for transferring a transfer product to a transfer target, and a support that holds the transfer product on one main surface, and the other main surface of the support A holding portion having a flat holding surface for holding the side, and a fluid supply portion for supplying a fluid to an isolated space formed between the other main surface of the carrier and the holding surface of the holding portion; When the transfer product is formed on one main surface of the carrier, the carrier is held flat by the holding surface, and when the transfer product is transferred to the transfer target, the carrier is The fluid is supplied to the space by the fluid supply unit and is expanded and deformed.

  The transfer pad according to the second aspect is a transfer pad for pad printing according to the first aspect, further comprising a fluid discharge part that discharges the fluid supplied to the space, and the fluid discharge part includes: The carrier is held flat on the holding surface by discharging the fluid from the space.

  A transfer pad according to a third aspect is a pad for pad printing according to the second aspect, wherein a plurality of openings are formed in a holding surface of the holding means, and the fluid supply unit and the The fluid discharge part supplies the fluid to the space through the opening or discharges the fluid in the space.

  The transfer pad according to the fourth aspect is a pad printing pad according to any one of the first to third aspects, wherein the fluid is a liquid.

  A pad printing apparatus according to a fifth aspect is a pad printing apparatus provided with a transfer pad for pad printing according to any one of the first to fourth aspects, and is held flat by the holding portion. A patterning portion for forming a predetermined pattern made of the transferred material, and a transferred body holding portion for holding the transferred body, and held by the transferred body holding portion. The carrier, which is inflated and deformed in a state where the pattern is formed on the one main surface, contacts the transferred body, and the pattern is printed on the transferred body.

  The pad printing apparatus according to a sixth aspect is the pad printing apparatus according to the fifth aspect, wherein the fluid discharge unit prints the pattern from the carrier onto the transfer target, and then the transfer target. When the carrier is separated from the space, the fluid is discharged from the space.

  A pad printing apparatus according to a seventh aspect is the pad printing apparatus according to the fifth or sixth aspect, wherein the patterning unit forms the pattern on one main surface of the carrier by a screen printing method. It is characterized by that.

  A pad printing apparatus according to an eighth aspect is the pad printing apparatus according to any one of the fifth to seventh aspects, wherein the imaging unit that images the one main surface of the carrier, the carrier, An alignment unit that aligns the patterning unit, the carrier has an alignment mark on the one main surface, the patterning unit includes a screen printing plate, and the alignment unit includes the imaging unit. The carrier and the screen printing plate are aligned based on the position of the alignment mark imaged by the unit.

  A pad printing apparatus according to a ninth aspect is the pad printing apparatus according to any of the fifth to eighth aspects, further comprising a cleaning unit that cleans the carrier, wherein the cleaning unit includes the carrier. A transfer product removing unit for removing a transfer product remaining on one main surface of the body, and a solvent removing unit for removing a solvent component absorbed by the carrier.

  A pad printing method according to a tenth aspect, wherein a patterning step of forming a predetermined pattern made of a transfer material on one main surface of a carrier held flat by a holding part having a flat holding surface; Supplying a fluid to an isolated space formed between the other main surface of the body and the holding surface of the holding portion to inflate and deform the carrier, and the carrier that is inflated and deformed. And a printing step of printing on the transferred body the predetermined pattern made of the transferred material that is in contact with the transferred body and formed on one main surface of the carrier.

  In the first aspect to the tenth aspect, a transfer material is supported on a support body that is held flat, a fluid is supplied between the support body and the holding surface, and the support body is inflated and deformed. A transfer product can be formed with a thick film thickness, and a pattern can be transferred to a transfer target having a three-dimensional shape by an inexpensive method. As a result, the amount of metal ink used as a transfer product can be reduced. In addition, a wiring pattern having a low resistance value can be formed.

1 is a schematic side view of a pad printing apparatus 1. FIG. It is a figure explaining the screen printing plate 41. FIG. 3 is a top view of the stage 12. FIG. It is a top view of the blanket 11. It is a figure explaining the fluid supply mechanism. It is a flowchart explaining a pad printing process. It is a figure explaining operation | movement of the transfer pad 10 in a pad printing process. It is a figure explaining operation | movement of the transfer pad 10 in a pad printing process.

<1.1 Configuration of Pad Printing Apparatus 1>
FIG. 1 is a schematic side view of the pad printing apparatus 1. A pad printing apparatus 1 provided with a pattern transfer body of this embodiment will be described with reference to FIG. The pad printing apparatus 1 includes a transfer pad 10, an imaging mechanism 20, a transfer target holding unit 30, a patterning unit 40, a control unit 50, and a base 2 that supports the transfer pad 10 from below as main components. Further, in order to enclose each component, the pad printing apparatus 1 is provided with side plates 4 erected on four sides and a top plate 3 on the upper side.

  The base 2 is a rectangular parallelepiped member that supports the transfer pad 10 from below, and the upper surface is a flat surface.

  The transfer pad 10 is disposed so as to be movable from the right side to the left side of the base 2 in the drawing. The transfer pad 10 is a device for transferring a transfer material serving as antenna wiring to a substrate having a three-dimensional structure as a transfer target. The detailed structure will be described later.

  The imaging mechanism 20 is above the transfer pad 10, and a plurality of CCD cameras are attached to the top 3 via attachment members 23. In this embodiment, in order to be able to image the alignment marks formed on the four sides of the rectangular blanket 11 and the screen printing plate 41, four CCD cameras are attached so that the lower side can be imaged. In FIG. 1, only the CCD cameras 21 and 22 are shown for convenience of illustration. All CCD cameras have the same structure, and a two-dimensional CCD camera or the like can be adopted. The CCD cameras 21 and 22 have an absolute position with respect to the transfer pad 10. Therefore, the position of the transfer pad 10 can be adjusted from the position of the alignment mark in the image captured and acquired by the CCD camera. As a result, the screen printing plate 41 and the blanket 11 can be aligned.

  The transferred object holding portion 30 is disposed on the right side of the drawing and above the base 2. The transferred object holding unit 30 is a mechanism for holding the transferred object 31 horizontally. Therefore, the holding surface is flat, and for example, an adsorption groove for adsorbing and holding the transfer target 31 is formed. For the sake of illustration, the transferred object holding portion 30 is attached to the top plate 3, but is not limited to such a structure.

  The patterning unit 40 includes a screen printing plate 41 and a doctor blade 42, and is a mechanism for forming an antenna wiring pattern made of the transfer material 43 on the blanket 11 included in the transfer pad 10. As such a transfer product 43, metal ink can be adopted. As an example of such a metal ink, an organic solvent or an aqueous solvent mixed with metal fine particles can be used.

  FIG. 2 is a diagram for explaining the screen printing plate 41. On the screen printing plate 41, an antenna pattern 44 and an alignment mark 45 are formed. The antenna pattern 44 is a pattern for forming antenna wiring. The film thickness of the wiring pattern for forming the antenna can be controlled by the depth of the antenna pattern 44 and the roughness of the screen mesh. In general, screen printing can print a thick film as compared with other printing methods. Therefore, in the present embodiment, it is possible to form a thick film wiring by forming an antenna wiring pattern using a screen printing technique.

  In this embodiment, the alignment mark 45 is formed in four directions so as to surround the antenna pattern 44, but is not limited to this. By imaging the alignment mark 45 with a CCD camera, the absolute position with respect to the CCD camera is specified, and the screen printing plate 41 can be aligned with the blanket 11.

  When alignment is performed with respect to the blanket 11, alignment is performed by a moving mechanism (corresponding to an alignment unit) included in the transfer pad 10 described later. After the alignment, the screen printing plate 41 is placed on the blanket 11. Thereafter, a transfer material 43 is supplied onto the screen printing plate 41 by a transfer material supply mechanism (not shown), and the doctor blade 42 is scanned on the screen printing plate 41 from one side to the other side, thereby blanket 11. An antenna pattern 44 is formed thereon via a screen printing plate 41.

  For loading / unloading the screen printing plate 41 to / from the transfer pad 10, the both ends of the screen printing plate 41 are held and taken out from the blanket 11 by a conveyance mechanism (not shown).

<1.2 Configuration of Transfer Pad 10>
The configuration of the transfer pad 10 will be described with reference to FIGS. 1 and 3 to 5. The transfer pad 10 is disposed on the base 2. The main configuration of the transfer pad 10 includes a blanket 11, a stage 12 that holds the blanket 11, an elevating mechanism 13 that supports the stage 12 so as to be movable up and down, and an isolated space formed between the stage 12 and the blanket 11. And a fluid supply mechanism 14 for supplying a fluid.

  FIG. 3 is a top view of the stage 12. The upper surface of the stage 12 as a holding unit is a holding surface that holds the back side (the other main surface) of the blanket 11. The holding surface 121 is flat. A plurality of openings 122 are formed in the holding surface 121. The opening 122 is connected to a supply path 144 described later, and the fluid 145 is supplied through the opening 122. The stage 12 is made of a metal material that can increase the accuracy of the flatness of the holding surface 121. For example, a stainless material or the like can be used.

  FIG. 4 is a top view of the blanket 11. An alignment mark 110 is formed on the surface (one main surface) of the blanket 11 that is a carrier for carrying the transfer product 43. By imaging this alignment mark 110 with the imaging mechanism 20, the absolute position of the imaging mechanism 20 and the blanket 11 can be specified. Thereby, alignment with the blanket 11, the screen printing plate 41, and the to-be-transferred body 31 can be performed.

  The blanket 11 is a flexible member that supports the transfer material 43 on the surface thereof, and has a liquid-repellent property with respect to the metal ink that is the transfer material 43 so that the transfer material 43 can be transferred to the transfer target 31. . Specifically, the contact angle is preferably 30 degrees or more. By adopting the blanket 11 made of such a material, the transfer residue of the transferred material 43 from the blanket 11 to the transfer target 31 is reduced, and the amount of the transferred material 43 used can be suppressed.

  The blanket 11 is larger in size than the stage 12 and can wrap the stage 12. And it is attached to the stage 12 by a seal member (not shown). Specifically, the end of the blanket 11 is attached on the back side of the stage 12 via a seal member. Therefore, an isolated space can be formed between the other main surface of the blanket 11 and the holding surface 121 of the stage 12. Since the blanket 11 is larger than the stage 12, the blanket 11 includes a buffer 111 in which the blanket 11 is slack as shown in FIG. By this buffer 111, when the fluid 145 is supplied to the space formed between the blanket 11 and the stage 12, the blanket 11 can be expanded and deformed into a convex shape. As such a buffer 111, the buffer 111 is provided at both ends of the blanket 11, but is not limited thereto. For example, the buffer 111 may be formed only on one side.

  Further, the blanket 11 has a flat shape by holding the flat holding surface 121 of the stage 12. That is, the shape of the blanket 11 can be changed between a flat shape on the stage 12 and an expanded shape expanded to a convex shape.

  A known lifting device can be adopted as the lifting mechanism 13. For example, it can be constituted by a guide rail, a ball screw, a motor and the like. By providing such a lifting mechanism 13, the blanket 11 can be brought close to or pressed against the transfer target 31, and the transfer material 43 carried on the blanket 11 can be printed on the transfer target 31. Instead of the lifting mechanism 13, a lifting mechanism may be provided on a member that holds the transfer body 31. That is, any mechanism that can relatively change the distance between the blanket 11 and the transfer target 31 may be used.

  The fluid supply mechanism 14 will be described with reference to FIG. The fluid supply mechanism 14 is a mechanism for supplying the fluid 145 to the stage 12. Specifically, a fluid supply source 141 for supplying the fluid 145, a pipe 143 connected to the supply path 144 formed in the stage 12 from the fluid supply source, and a pump disposed in the middle of the pipe 143 142.

  As the fluid 145, gas or liquid can be employed. However, it is preferably a liquid, and the viscosity of the liquid is determined by the wettability of the transfer product 43, the blanket 11, and the transfer target 31. From the obtained knowledge, a liquid adjusted to have a viscosity preferably in the range of 1000 cp to 50000 cp is used.

  The pump 142 has a function of delivering the fluid 145 supplied from the fluid supply source 141 to the opening 122 of the stage 12 and sucking the fluid 145 supplied to the space formed between the blanket 11 and the stage 12. Have.

  When the pump 142 supplies the fluid 145, the fluid 145 delivered from the pump 142 passes through the supply path 144 formed in the stage 12 through the pipe 143 and is discharged from the opening 122. At this time, the discharge speed of the pump 142 is preferably operated with an accuracy within 10% of the set speed. Thereby, the position reproducibility when transferring the transfer product 43 to the transfer target 31 can be improved.

  In addition, by rotating the pump 142 in the reverse direction to the time of delivery, the fluid 145 filled in the space formed between the blanket 11 and the stage 12 can be sucked. Thereby, the blanket 11 expanded and deformed by the supply of the fluid 145 can be held flat against the holding surface 121 of the stage 12 again. When implemented using such a pump 142, the opening 122 formed on the stage 12 functions as a supply port and a suction port.

  In addition, it is good also as a structure which has two paths, a supply path and a suction path. In such a case, a supply path and a suction path may be connected to the opening 122 functioning as a supply port and the opening 122 functioning as a suction port, respectively, and a supply pump and a suction pump may be used. A configuration including such a suction path functions as a fluid discharge unit. That is, the fluid discharge unit may be a pump that can perform delivery and suction, or can be realized by providing a pump for delivery and a pump for suction.

  The transfer pad 10 can be moved along the Y direction in FIG. 1 by a Y direction moving mechanism (not shown). In other words, it can move between the patterning position PP on the left side of the drawing and the printing position IP on the right side. The transfer pad 10 also includes an X-direction moving mechanism that can move along the X direction in order to align the screen printing plate 41 and the blanket 11 and to align the blanket 11 and the transfer target 31.

  The control unit 50 can employ a known computer for controlling the transfer pad 10. The control unit 50 can control operations of the pump 142 and the lifting mechanism 13 described above. Moreover, you may comprise so that the pad printing apparatus 1 which is the whole apparatus may be controlled. In such a case, alignment is further performed from an image captured by the imaging mechanism 20 or the like. Therefore, an image processing program for performing alignment processing is also provided. Needless to say, the control unit 50 may be configured to control only the transfer pad 10 and to have another control function for controlling the whole including the pad printing apparatus 1.

<2. Operation of pad printing apparatus 1>
The operation of the pad printing apparatus 1 will be described with reference to FIGS. FIG. 6 is a flowchart for explaining pad printing processing by the pad printing apparatus 1, and FIGS. 7 and 8 are diagrams for explaining the operation of the transfer pad 10 in pad printing processing.

  The transfer pad 10 provided in the pad printing apparatus 1 holds the blanket 11 flat on the flat holding surface 121 of the stage 12 (step S11). That is, the fluid 145 does not flow into the isolated space SP (see FIG. 8) formed between the blanket 11 and the holding surface 121 of the stage 12 (FIG. 7A). In other words, the other main surface of the blanket 11 and the holding surface 121 of the stage 12 are in contact with each other, and the space SP is not formed at this point. Since the blanket 11 is held in such a state, the blanket 11 can be patterned with high accuracy during the patterning process in step S12. In addition, the alignment mark 110 of the blanket 11 is imaged by the imaging mechanism 20 and the position of the blanket 11 is specified by the control unit 50.

  A screen printing plate 41 is placed on one main surface of the blanket 11 held flat. The screen printing plate 41 is transported above the blanket 11 while being held at both ends by a transport mechanism (not shown), and the transport mechanism is lowered and placed on the blanket 11. At this time, the imaging mechanism 20 images the alignment mark 45 formed on the screen printing plate 41, and the position of the screen printing plate 41 is specified. Based on the position of the blanket 11 detected in step S11 and the position of the screen printing plate 41, the blanket 11 and the screen printing plate 41 are aligned.

  Then, a transfer product 43 (not shown) is supplied onto the placed screen printing plate 41 (FIG. 7B). When the doctor blade 42 moves on the screen printing plate 41 in the direction of the arrow, the transferred material 43 is introduced into the mesh formed on the screen printing plate 41 (FIG. 7C). In addition, the process of removing the excess transcription | transfer material 43 with a squeegee may be performed after introducing the transcription | transfer material 43 by the doctor blade 42 by further providing a squeegee.

  When the scanning on the screen printing plate 41 by the doctor blade 42 is completed, the screen printing plate 41 is peeled from the blanket 11 by the transport mechanism. When the screen printing plate 41 is peeled off from the blanket 11, an antenna wiring pattern formed of the transfer material 43 is formed on one main surface of the blanket 11 (FIG. 7D). A patterning process for forming a wiring pattern on one main surface of the blanket 11 is performed by the screen printing plate 41 (step S12).

  Next, the transfer pad 10 moves from the patterning position PP to the printing position IP. After the movement, the control unit 50 operates the fluid supply mechanism 14 so that the fluid 145 is supplied to the space SP by the pump 142 (FIG. 8A). By supplying the fluid 145 to the space SP, the blanket 11 that has been in contact with the stage 12 is raised by the amount of the buffer 111. In other words, the blanket 11 is expanded and deformed into a convex shape by the fluid 145 (step S13).

  Then, the controller 50 operates the elevating mechanism 13 to bring the expanded and deformed blanket 11 into contact with and press the transferred body 31 (FIG. 8B). At this time, even if the substrate as the transfer target 31 has a three-dimensional shape, the blanket 11 is deformed along the surface of the three-dimensional shape because the blanket 11 is expanded and deformed by the fluid 145. As a result, the blanket 11 can abut on the transferred body 31 with high accuracy even when the transferred body 31 has a three-dimensional shape. In addition, since the one main surface of the blanket 11 has a lyophobic property, the transferred material 43 is transferred to the transfer target 31. In other words, the transfer pattern 43 formed in the wiring pattern of the antenna is transferred to the transfer body 31, whereby the wiring pattern is printed on the transfer body 31 (step S14).

  The controller 50 raises the stage 12 by the elevating mechanism 13 and presses the blanket 11 against the transfer body 31, and then lowers the elevating mechanism 13 again to pull the blanket 11 away from the transfer body 31 (step S15). At this time, it is preferable to separate the fluid 145 supplied to the space SP while discharging it (FIG. 8C). Thereby, even if the transfer property of the transfer product 43 from the blanket 11 to the transfer target 31 is poor, it can be transferred well. Note that the fluid 145 supplied to the space SP may be discharged after the blanket 11 is separated from the transfer target 31.

  In the pad printing apparatus 1 according to this embodiment, when the antenna wiring pattern is formed on the transfer pad 10, the wiring pattern is formed with the blanket 11 held flat on the stage 12. Therefore, the wiring pattern can be formed on the blanket 11 with high accuracy.

  In addition, when the wiring pattern is formed on the blanket 11, it can be formed by a screen printing method to form a wiring pattern having a thick film thickness. Thereby, a wiring pattern with a high resistance value can be obtained.

  In addition, by expanding and deforming the blanket 11 with the fluid 145, the transferred material 43 can be transferred along the shape even if the transfer target 31 has a three-dimensional shape.

  Therefore, by using the pad printing apparatus 1 according to the present embodiment, an expensive metal mold is not required, and a wiring pattern can be printed with a thick film thickness on a three-dimensional printed material. Therefore, it is possible to form a wiring pattern in which deterioration in quality is suppressed.

<3. Modification>
As described above, the carrying of the embodiment of the present invention has been described. However, the present invention can be modified in various ways other than those described above without departing from the gist thereof.

  In the above embodiment, when the transfer product 43 remains on the surface of the blanket 11, for example, a transfer removing unit that removes the transfer product 43 remaining by cleaning with a solvent may be provided. Thereby, the surface state of the blanket 11 can be kept constant, and the reproducibility of the transfer process can be ensured. Moreover, you may further provide the solvent removal part which removes the solvent component absorbed by the blanket 11. FIG. Thereby, the solvent component contained in the transfer product 43 is removed from the blanket 11, and the life of the blanket 11 can be extended.

  In the above-described embodiment, the transferred material 43 is transferred to the transfer target 31 by bringing the expanded blanket 11 into contact with the transfer target 31 and pressing it. However, the present invention is not limited to this. For example, after the blanket 11 is raised to the vicinity of the transfer target 31 by the lifting mechanism 13, the fluid 145 is supplied to the blanket 11, and one main surface of the blanket 11 is brought into contact with the transfer target 31 with the force of expansion and deformation. It is good also as a structure which transfers the thing 43. FIG. In other words, it may be configured to transfer while expanding and deforming.

  In the above embodiment, the patterning process is performed by a screen printing method. For example, a relief printing method, an intaglio printing method, an offset printing method, or the like can be used.

  Further, the transfer pad 10 may be provided with a mechanism that can rotate around the Z axis. Thereby, alignment with respect to XY plane can be performed accurately.

DESCRIPTION OF SYMBOLS 1 Pad printer 10 Transfer pad 11 Blanket 12 Stage 13 Elevating mechanism 14 Fluid supply mechanism 20 Imaging mechanism 30 Transfer object holding part 31 Transfer object 40 Patterning part 41 Screen printing plate 43 Transfer material 121 Holding surface SP Space

Claims (10)

A transfer pad for pad printing to transfer a transferred material to a transfer target,
A carrier for holding the transfer on one main surface;
A holding part having a flat holding surface for holding the other main surface side of the carrier;
A fluid supply unit that supplies fluid to an isolated space formed between the other main surface of the carrier and the holding surface of the holding unit;
When the transfer product is formed on one main surface of the support, the support is held flat by the holding surface, and when transferring the transfer to the transfer target, the support is supplied with the fluid. A transfer pad for pad printing, wherein a fluid is supplied to the space by the portion and is expanded and deformed. A transfer pad for pad printing according to claim 1,
A fluid discharge part for discharging the fluid supplied to the space;
The transfer pad for pad printing, wherein the fluid discharge part holds the carrier flat on the holding surface by discharging the fluid from the space. A transfer pad for pad printing according to claim 2,
A plurality of openings are formed in the holding surface of the holding means,
The transfer pad for pad printing, wherein the fluid supply unit and the fluid discharge unit supply the fluid to the space through the opening or discharge the fluid in the space. A transfer pad for pad printing according to any one of claims 1 to 3,
The transfer pad for pad printing, wherein the fluid is a liquid. A pad printing apparatus comprising the transfer pad for pad printing according to any one of claims 1 to 4,
A patterning unit that forms a predetermined pattern made of the transferred material on one main surface of the carrier held flat by the holding unit;
A transferred object holding portion for holding the transferred object,
The carrier, which is inflated and deformed in a state where the pattern is formed on the one main surface, contacts the transferred object held by the transferred object holding portion, and the pattern is printed on the transferred object. A pad printing apparatus. The pad printing apparatus according to claim 5,
The fluid discharge part is
A pad printing apparatus that discharges the fluid from the space when the carrier is pulled away from the transferred body after the pattern is printed from the carrier to the transferred body. The pad printing apparatus according to claim 5 or 6,
The patterning unit includes
A pad printing apparatus, wherein the pattern is formed on one main surface of the carrier by a screen printing method. The pad printing apparatus according to any one of claims 5 to 7,
An imaging unit for imaging the one main surface of the carrier;
An alignment unit that aligns the carrier and the patterning unit, and
The carrier has an alignment mark on the one main surface,
The patterning unit includes a screen printing plate,
The pad printing apparatus, wherein the alignment unit performs alignment between the carrier and the screen printing plate based on the position of the alignment mark imaged by the imaging unit. The pad printing apparatus according to any one of claims 5 to 8,
A cleaning unit for cleaning the carrier;
The cleaning unit
A transfer product removing unit for removing a transfer product remaining on one main surface of the carrier;
And a solvent removing unit that removes the solvent component absorbed by the carrier. A patterning step of forming a predetermined pattern made of a transfer material on one main surface of the carrier held flat by a holding portion having a flat holding surface;
Supplying fluid to an isolated space formed between the other main surface of the carrier and the holding surface of the holding part to expand and deform the carrier;
A printing step of printing the predetermined pattern made of the transferred material formed on one main surface of the carrier in contact with the member to be transferred, which is inflated and deformed; A pad printing method comprising:

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