JP2000263756A - Method and apparatus for transfer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the dislocation of coloring pattern during the transferring period by transferring a coloring pattern through heating operation and compression operation after tacking the transfer base material to the base material to be transferred by the adhesiveness of a visco-elastic layer after positioning a base transfer material with a coloring pattern formed via a visco-elastic layer on a support body, and a base material to be transferred. SOLUTION: A transfer base material 61 and a base material 4 to be transferred are positioned by drawing out a belt-like transfer base material 61 with a coloring pattern formed thereon from a printing base material roll 2. Next, the transfer base material 61 is brought in contact with the base material 4 by a toothed roll 12 to subsequently be tacked on the base material 4 to be transferred by the adhesiveness of the visco-elastic layer on the surface of the transfer base material 61 without heating. After that, a coloring pattern is transferred from the transfer base material 61 to the side of the base material 4 to be transferred by conducting compressing and heating operations by a transfer press 31. As such, by transferring the coloring pattern by a transfer press under heat-compression after integrating and tacking the transfer base material 61 and base material 4 to be transferred, tbe positional dislocation of the coloring pattern never occurs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer method and a transfer device for transferring a colored pattern formed on a support to a substrate to be transferred, and more particularly to a transfer method and a transfer device for a high-definition colored pattern.

[0002]

2. Description of the Related Art Methods such as photolithography and electrodeposition are used for forming electronic materials having a high-definition pattern, and these methods are manufactured through a number of steps. Mass production requires large-scale equipment. On the other hand, a method of forming a pattern by printing is a method suitable for mass production, but has a problem that a pattern obtained by printing is inferior to photolithography in its accuracy and the like.

As a printing method for forming a high-definition pattern, methods such as offset printing and gravure printing are known. In offset printing, the ink is transferred to the blanket and then the ink is transferred from the blanket onto the print substrate.However, when the blanket is transferred to the print substrate, a change in the shape occurs, and the pixel shape is accurately determined. There was a problem that was not reproduced. Also, in the gravure printing method, when the ink is transferred to the printing medium directly from the intaglio without passing through the blanket, the shape of the pixel is similarly not accurately reproduced. was there.

Therefore, as described in Japanese Patent Application Laid-Open No. Hei 5-169614, the shape of the cells is improved so that the transferred image from the cells on the lithographic plate to the blanket is highly accurate, Methods such as increasing the transfer rate have been proposed, but these methods cannot transfer continuously, and are limited to single-wafer apparatuses. It has been difficult to form an accurate pixel in μm units.

The applicant of the present invention has proposed a printing substrate capable of accurately transferring the shape of an ink pattern on a formed plate material onto a substrate to be transferred and a high-definition printing method using the same. No. 10-7436. In the printing substrate and the high-definition printing method proposed by the present applicant, the ink in the intaglio is transferred to the band-shaped printing substrate side provided with a layer having viscoelasticity on the surface, and then the ink on the printing substrate is coated. This is to be transferred to a transfer substrate. In this method, since the printing base material has the viscoelastic layer, the ink in the intaglio on the printing plate can be accurately transferred to the printing base material side. It can be transferred to the side.

FIG. 8 is a view for explaining a method of transferring an ink pattern to a transfer-receiving substrate using a printing substrate on which an ink pattern has been formed. FIG. 8A is a diagram illustrating a roll-type transfer method. The transfer substrate 61 in which the coloring pattern is formed on the printing substrate is pulled out from the belt-shaped printing substrate roll 2 and is heated and pressed by the transfer roll 3 so that the coloring pattern is transferred to the transfer substrate 4 such as a glass substrate. Is transferred to The transfer base material 61 onto which the coloring pattern has been transferred is taken up by the take-up roll 5.

FIG. 8B is a diagram illustrating a press-type transfer method. As in the method shown in FIG. 8A, the transfer substrate 61 on which the colored pattern is formed is pulled out from the belt-shaped printing substrate roll 2 and heated and pressed by the transfer press 31 to form a glass substrate. The colored pattern is transferred to the substrate 4 to be transferred. The transfer base material 61 onto which the coloring pattern has been transferred is taken up by the take-up roll 5.

In these transfer methods, since the transfer substrate and the substrate to be transferred such as a glass substrate are pressed and heated while being in contact with each other, the size of the transfer substrate is reduced by the influence of the pressure and heating. As a result, there is a problem that the size of the colored pattern transferred to the substrate to be transferred changes, and the colored pattern formed on the transfer substrate is not accurately transferred.

In particular, it has been difficult to realize a high-precision printed matter having a displacement of 10 μm, which is allowable in a device having a diagonal of 12.1 inches, such as a color filter used in a liquid crystal display device. .

[0010]

SUMMARY OF THE INVENTION According to the present invention, there is produced a shift in a colored pattern formed by a transfer such as a positional shift which occurs when a printing substrate on which a printing pattern is formed is transferred to a substrate to be transferred such as a glass substrate. SUMMARY OF THE INVENTION It is an object of the present invention to provide a transfer method and a transfer device which do not have a transfer function, and to provide a method and a device capable of transferring a highly accurate colored pattern.

[0011]

The present invention relates to a method for transferring a colored pattern from a transfer substrate having a colored pattern formed on a support to a substrate to be transferred. After the transfer substrate and the transfer-receiving substrate are positioned using a colored pattern formed via the viscoelastic layer, the transfer substrate is temporarily attached to the transfer-receiving substrate by the adhesiveness of the viscoelastic layer. This is a method of transferring a colored pattern in which the transferred and temporarily transferred transfer base material and the transferred base material are pressed under heating to transfer the colored pattern from the transfer base material to the transferred base material. Further, in a transfer device for transferring a colored pattern from a transfer base material having a colored pattern formed on a support to a transfer-receiving substrate, a transfer substrate having a colored pattern formed on a support via a viscoelastic layer is provided. The material, the positioning means for positioning the transferred substrate, and the viscoelastic layer of the transfer substrate, by contacting the transferred substrate,
Due to the adhesiveness of the viscoelastic layer, a temporary fixing means for temporarily fixing the transfer base material to the transferred base material, and the temporarily fixed transfer base material and the transferred base material are pressed under heating to form a colored pattern. This is a transfer device for a colored pattern comprising a transfer means for transferring from a transfer substrate to a transfer substrate.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The method of the present invention comprises contacting a transfer substrate having a colored pattern formed on a printing substrate with a transfer substrate without heating, by using the adhesiveness of the transfer substrate. The present invention has realized a transfer method in which the transfer base material and the printing medium are integrated and temporarily fixed, and then transferred by a transfer roll or a transfer press under heating and pressurization so that no displacement occurs.

The present invention will be described below with reference to the drawings. FIG. 1 is a view for explaining an embodiment of the transfer device of the present invention. In the transfer device 11 shown in FIG. 1, the belt-shaped transfer base material 61 on which the colored pattern is formed
After the transfer substrate and the substrate to be transferred are positioned and brought into contact with the substrate 4 to be transferred by the close contact roll 12, the viscoelastic layer on the surface of the transfer substrate 61 is coated without heating. The transfer substrate is brought into contact with the transfer substrate and temporarily fixed at a predetermined position on the substrate to be transferred by the adhesiveness of the viscoelastic layer. The color pattern is transferred to the side. FIG. 1 shows an example in which the transfer of the colored pattern is performed by heating and a transfer press, but the transfer may be performed by a transfer roll that performs heating and pressing instead of the transferring press that performs heating and pressing.

FIG. 2 is a diagram for explaining another embodiment of the transfer method of the present invention. In the transfer device 11 shown in FIG.
The belt-shaped transfer base material 61 on which the colored pattern is formed is pulled out from the printing base material roll 2, and after positioning the transfer base material and the transfer base material, the transfer base material 61 is brought into contact with the transfer base material 4 by the contact press 13. The viscoelastic layer on the surface of the transfer substrate comes into contact with the substrate to be transferred without heating or pressing, and is temporarily fixed at a predetermined position on the substrate to be transferred by the adhesiveness of the viscoelastic layer,
Thereafter, the transfer press 31 transfers the colored pattern from the transfer base material side to the transfer base material side. In the apparatus shown in FIG. 2 as well, the example in which the transfer of the colored pattern is performed by a transfer press that performs heating and pressurization has been described, but instead of the transfer press, the transfer may be performed by a transfer roll that performs heating and pressurization. .

FIG. 3 is a view for explaining an example of a method of positioning the transfer base material and the transfer base material. As shown in FIG. 3 (A), both the alignment index 14 provided on the substrate 4 to be transferred and the alignment index 16 provided on the transfer jig 15 are matched and positioned. As shown in B), the substrate 4 to be transferred is placed at a predetermined position on the transfer jig 15. Next, as shown in FIG.
Movable table 1 capable of arbitrary movement in X-axis, Y-axis, and Z-axis directions
The transfer jig 15 having the transfer base material 4 attached thereon is placed on the transfer base 7, and the positioning index 18 provided on the transfer base material and the positioning index 19 provided on the transfer jig are aligned with the positioning apparatus 20.
After detecting the misalignment of the two and moving the movable table 17 to match the two, the viscoelastic layer surface of the transfer substrate 61 is brought into contact with the transfer substrate using the contact holding plate 21, After the transfer base material is brought into close contact with the base material to be transferred by utilizing the adhesiveness of the viscoelastic layer, heating and pressurizing are performed by the transfer press 31 to transfer the colored pattern on the transfer base material.

In the transfer apparatus and the transfer method of the present invention, the base material to be transferred is temporarily fixed using the adhesiveness of the base material in advance as described above, so that the base material to be transferred and the base material to be transferred are Since the positional relationship between the colored pattern and the colored pattern is accurately maintained, the transfer in a state where the shape of the colored pattern is accurately maintained can be performed.

Next, a transfer substrate suitable for use in the transfer method and transfer apparatus of the present invention will be described. The transfer base material of the present invention has a viscoelastic layer on a support such as a synthetic resin film, and the viscoelastic layer has an adhesive property to a gravure cylinder and absorbs a solvent in the ink when the ink is transferred. In addition, it is preferable that the ink has a viscosity increasing property and has a releasability such that the ink is easily released from the viscoelastic layer by heating. In addition, the viscosity of the viscoelastic layer improves the followability of the printing base material to the gravure cylinder intaglio pattern, the elasticity improves the restoring force after deformation of the viscoelastic layer, and allows the colored pattern in the intaglio pattern to be printed on the printing base material. The transferability of the colored pattern on the transfer base material to the print base material and the transferability of the colored pattern on the transfer base material to the transfer base material are improved.

FIG. 4 is a diagram for explaining a method of manufacturing a transfer base material used in the transfer method of the present invention. The operation of the printing device 41 for printing a transfer substrate will be described. The ink 42 is uniformly attached to the surface of the rotating furnisher roller 43,
Next, the printing pattern 45 formed on the gravure cylinder 44 rotating in contact with the furnisher roller 43 is filled with ink, and the surface of the printing pattern 45 is shaped by a doctor 46. Next, the printing substrate 1 is continuously supplied to the surface of the gravure cylinder 44, pressed by the impression cylinder 48 rotating from the opposite side to the gravure cylinder, and filled in the pattern of the gravure cylinder 44 on the surface of the printing substrate 1. The transferred ink pattern 49 is transferred.

In particular, since the printing substrate 1 used in the printing method of the present invention has a viscoelastic layer having viscoelasticity formed on the surface of the support, the ink pattern transferred to the printing substrate 1 is as follows: It has the characteristic that the ink shape of the intaglio is completely transferred, and an ink pattern with an accurate shape is obtained. The ink pattern formed on the printing substrate by the printing method of the present invention may be a pattern in which ink patterns having different colors or compositions are sequentially formed.

FIG. 5 is a view for explaining the process of transferring ink from the gravure cylinder to the printing substrate in the printing method of the present invention. FIG. 5A is a diagram illustrating a printing substrate that has contacted a part of the gravure cylinder. The printing substrate 1 includes an impression cylinder 48.
When the printing base material is pressed against the impression cylinder from the back and brought into contact with the pattern non-formation portion 50 of the gravure cylinder, the support of the printing base material 1 The viscoelastic layer 52 formed on the surface of 51 is in close contact with the pattern non-formed portion 50.

The viscoelastic layer moves while changing the contact portion as the gravure cylinder rotates. As shown in the drawing, when the surface of the printing base material comes into contact with the printing pattern 56 and the transfer of the ink to the printing base material side starts, the viscosity of the surface of the printing base material 1 near the printing pattern forming portion 53 is increased. The elastic layer 52 is still in close contact with the pattern non-formed portion 50 of the gravure cylinder 44. Thereby, the transfer of the ink pattern to the printing base material is performed in a state where the positioning is performed even though the printing base material 1 is continuously moving, and accurate transfer starts. In addition, the viscoelastic layer on the printing substrate serves to adhere the ink, and the transfer of the ink is better than when the viscoelastic layer is not formed. In addition, as shown in FIG. 5 (B), the transfer of the printing base material moved with the rotation proceeds in a state where a part of the printing base material is in contact with the pattern non-forming portion 54 in the vicinity of the printing pattern 45. The transfer is completed with the positioning performed.

FIG. 6 is a diagram for explaining the transfer of the ink to the viscoelastic layer on the printing substrate. As the support 51 of the printing base material 1, a synthetic resin film or the like having a large strength is used. Since the solvent in the ink does not penetrate the synthetic resin film or the like, the solvent of the transferred ink gradually evaporates from the surface, and the properties of the transfer ink pattern 55 become stable. The viscoelastic layer 52 formed on the support has a function of absorbing the solvent of the ink. When the ink is transferred to the viscoelastic layer, the viscoelastic layer 52 absorbs the solvent 56 in the ink to form an ink pattern. The solvent in the ink is reduced to increase the viscosity of the ink and improve the retention of the pattern shape. Since such characteristics are developed from the start of the transfer to the viscoelastic layer, the shape of the ink pattern is accurately transferred onto the viscoelastic layer.

FIG. 7 is a cross-sectional view for explaining a printing substrate on which an ink pattern has been formed. Support 51 of printing substrate 1
Is preferably a synthetic resin film having a large strength such as a synthetic resin film such as polyethylene terephthalate, polyethylene naphthalate, polyether sulfone, polyphenylene sulfide, polyamide, polyimide, polyamide imide, or aromatic polyamide, and also having a large Young's modulus. is there.

The viscoelastic layer mainly has viscoelasticity and dimethylpolysiloxane as a silicone copolymer, butyl acrylate, 2-ethylhexyl acrylate, butyl methacrylate,
Isocyanate ethyl or a copolymer composed of at least one of methacrylate, dimethylpolysiloxane, methylphenylpolysiloxane, or methylfluoropolysiloxane, stearyl (meth) acrylate, n-butyl (meth) acrylate as an acrylic copolymer, n -Butyl (meth) acrylate, lauryl (meth) acrylate, 2-hydroxyethyl (meth)
The layer is made of a material such as a copolymer of at least one of acrylate and 2-ethylhexyl (meth) acrylate. In addition, (meth) acrylate means one containing at least one of acrylate and methacrylate.

In the transfer method of the present invention, in the transfer step, the viscoelastic layer also functions as an adhesive for temporarily fixing to the transfer substrate in the transfer step.
The viscoelastic layer has a loss tangent tan δ of 0.01 to 0.2,
It is preferable that the complex elastic modulus is 10 ⁶ to 10 ⁷ dyne / cm ² and the critical surface tension is 20 to 26 dyne / cm. As the printing substrate, a substrate obtained by applying a viscoelastic layer to a thickness of 20 μm to 200 μm on a support having a thickness of 30 μm to 300 μm can be used.

[0026]

EXAMPLES Specific examples according to the transfer method of the present invention will be described below. Example 1 A cell having a diameter of 1 in which 100 μm cells were formed at intervals of 300 μm
In a gravure printing apparatus having a gravure cylinder of 91 mm, a printing substrate in which a viscoelastic layer was formed to a thickness of 20 μm on a support made of polyethylene terephthalate having a thickness of 50 μm was prepared by adding 10% by weight of an organic pigment and 10% by weight of a polyurethane resin. %, And 80% by weight of a mixed solvent of toluene and methyl ethyl ketone, and printing was performed at a speed of 50 m / min.

Next, the transfer substrate on which the ink pattern has been formed is brought into contact with the transfer substrate at a temperature of 23 ° C. ± 0.1 ° C., and is then pressed by a flat-plate press capable of changing the pressing pressure. A pressure from 0 kg / cm ² to 5 kg / cm ² was applied for 10 seconds to temporarily fix. Then temperature 1
Pressure was applied at 40 ° C. and 5 kg / cm ² for 10 seconds. The dimensions of the ink pattern of the obtained transfer substrate were measured, and the results are shown in Table 1.

Comparative Example 1 Transfer was performed in the same manner as in Example 1 except that temporary fixing was not performed, and evaluation was performed in the same manner as in Example 1. The results are shown in Table 1.

[0029]

[Table 1]

[0030]

According to the transfer method and the transfer method of the present invention, a colored pattern formed on a transfer substrate can be transferred with high precision. In addition, by using a transfer substrate in which a colored pattern was formed on the surface of a belt-shaped substrate, a highly accurate colored pattern could be efficiently produced.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an embodiment of a transfer method according to the present invention.

FIG. 2 is a diagram illustrating another embodiment of the transfer method of the present invention.

FIG. 3 is a diagram illustrating an example of a method for positioning a transfer substrate and a transfer substrate.

FIG. 4 is a diagram illustrating a method of manufacturing a transfer base material used in the transfer method of the present invention.

FIG. 5 is a diagram illustrating a process of transferring ink from a gravure cylinder to a printing substrate.

FIG. 6 is a diagram illustrating transfer of ink to a viscoelastic layer on a printing substrate.

FIG. 7 is a cross-sectional view illustrating a printing substrate on which an ink pattern is formed.

FIG. 8 is a diagram illustrating a method of transferring an ink pattern to a transfer-receiving substrate using a transfer substrate on which an ink pattern has been formed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Printing base material, 2 ... Printing base material roll, 3 ... Transfer roll,
DESCRIPTION OF SYMBOLS 31 ... Transfer press, 4 ... Transfer base material, 5 ... Winding roll, 11 ... Transfer device, 12 ... Contact roll, 13 ... Contact press, 14 ... Positioning index, 15 ... Transfer jig, 1
6 ... Positioning index, 17 ... Movable table, 18 ... Positioning index provided on printing base material, 19 ... Positioning index provided on transfer jig, 20 ... Positioning device, 21 ... Pressing plate for close contact, 41 ... Printing device for printing base material, 42 ... Ink, 43
... Furnisher roller, 44 ... gravure cylinder, 45 ... printing pattern, 46 ... doctor, 48 ... impression cylinder, 49 ... ink pattern, 50 ... pattern non-forming part, 51 ... support,
52: Viscoelastic layer, 56: Print pattern, 53: Near the print pattern forming portion, 54: Non-pattern formed portion, 55: Transfer ink pattern, 56: Solvent, 61: Transfer substrate

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akio Sonehara 1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo Inside Dai Nippon Printing Co., Ltd. (72) Inventor Mio Makino 1-chome, Ichigaya-cho, Shinjuku-ku, Tokyo No. 1 Dai Nippon Printing Co., Ltd.

Claims (2)

[Claims] 1. A method for transferring a colored pattern from a transfer substrate having a colored pattern formed on a support to a substrate to be transferred, wherein the transfer substrate is colored via a viscoelastic layer on the support as a transfer substrate. After positioning the transfer substrate and the transfer substrate using the one on which the pattern is formed, the transfer substrate is temporarily fixed to the transfer substrate by the adhesiveness of the viscoelastic layer, and the temporarily fixed transfer substrate A method for transferring a colored pattern, comprising: pressing a material and a substrate to be transferred under heating to transfer the colored pattern from the transfer substrate to the substrate to be transferred. 2. A transfer device for transferring a colored pattern from a transfer substrate having a colored pattern formed on a support to a substrate to be transferred, wherein the colored pattern is formed on the support via a viscoelastic layer. The transferred base material, the positioning means for positioning the transferred base material, and the viscoelastic layer of the transfer base material are brought into contact with the transferred base material, and the transfer base material is transferred by the adhesiveness of the viscoelastic layer. A temporary fixing means for temporarily fixing to the base material; and a transfer means for transferring the colored pattern from the transfer base material to the transferred base material by pressing the temporarily fixed transfer base material and the transferred base material under heating. An apparatus for transferring a colored pattern.