JP6809452B2 - Printed matter, printing plates, and their manufacturing methods - Google Patents

Description

The present invention relates to a printed matter formed by forming ink on a base material, a printing plate, and a method for producing the same.

In recent years, there have been an increasing number of cases where gravure offset printing is used as a manufacturing method for industrial products in various fields such as building materials, packaging, publishing, and electronics in the fields of living, electrical, and information. Gravure offset printing is a technique for stably printing a pattern having high resolution and high dimensional accuracy on the surface of an object to be printed by using various inks, resins, conductive pastes and other highly viscous coating materials.

The gravure offset printing process is one of the transfer printing methods including the following three steps.
[Step 1] A doctor member such as a doctor blade, a squeegee, or a scraper (hereinafter, also simply referred to as a "doctor member") is used in a recess (pattern portion) of an intaglio plate for gravure offset printing made of glass, resin, metal, or the like. The process of filling ink.
[Step 2] A transfer body (for example, a blanket) having a transfer layer whose surface is coated with a resin such as silicone is rotated while being in contact with an ink-filled intaglio for gravure offset printing, and the transfer layer (for example, for example) is rotated. The process of transferring the ink film onto the printed surface of the blanket.
[Step 3] A step of crimping a transfer body to a printing body as a base material and transferring an ink film remaining on the transfer layer onto the printing body as a printing pattern.

According to these printing steps, it is possible to print a pattern of highly viscous coating materials such as various inks, resins, and conductive pastes on the surface of the object to be printed with high resolution and high dimensional accuracy.

As the gravure offset printing method, for example, Patent Document 1 discloses a method of printing a patterned wiring structure on a frame portion by a method of manufacturing a conductive member for a touch panel having a wiring structure.

Japanese Unexamined Patent Publication No. 2011-210148 JP-A-55-005856

In the method using an intaglio printing plate as in Patent Document 1, it is necessary to use a recess having a large depth so that a large amount of ink can be accommodated when forming a thick printing layer. However, when such a deep recess is used, the ink transferred onto the substrate becomes significantly biased in the cross section perpendicular to the printing surface of the printed material, and the ink squeezes out due to the ink flow after printing. Occurs. Further, when a relatively large area is solidly coated, there is a possibility that blurring due to ink bias may occur due to the bending of the doctor member in the concave portion having a large area. When a wiring pattern is formed on a base material by using this gravure offset printing method, such ink squeeze out or faintness may cause a short circuit or disconnection of the circuit and impair the electrical characteristics.

The present invention has been made in view of such a problem, and an object of the present invention is to print a printed matter or a print that can suppress protrusion or blurring due to ink bias when printing using an intaglio plate. The purpose is to provide plates and methods for producing them.

The first aspect of the present invention is
A printed matter composed of a base material and an ink layer on the base material.
It has at the top at least one recess,
The depth of at least one recess is smaller than the height of the ink layer.
The ink layer is composed of a plurality of ridge-shaped portions.
Each ridged portions of the ink layer, in the region of the top side of the ridged portion than the bottom of the recess, the Rukoto to have a asymmetric shape in a cross section perpendicular to the longitudinal direction of the ridge-shaped portion It is a characteristic printed matter.

A second aspect of the present invention is
A printed matter composed of a base material and an ink layer on the base material.
With at least one recess at the top
The recess, as the depth of the at least one of said recess equals the height of the ink layer, possess an exposed portion of said substrate is exposed,
The exposed portion is linear and
The minimum value of the line width of the exposed portion is printed materials you wherein <br/> that is 5μm or more 100μm or less.

A third aspect of the present invention is
The printed matter of the second aspect is characterized in that the maximum value of the straight line connecting the two points on the boundary line defining the exposed portion is 5 μm or more and 100 μm or less.

A fourth aspect of the present invention is
The printed matter of the third aspect is characterized in that the maximum value of the straight line connecting the two points on the boundary line defining the exposed portion differs depending on the width of the ink layer.

A fifth aspect of the present invention is
The exposed portion is a printed matter of a third aspect, characterized in that it occupies 20% to 70% of the area of the ink layer in a top view.

A sixth aspect of the present invention is
The printed matter according to any one of the first to fifth aspects, wherein the ink layer is provided as a wiring layer.

A seventh aspect of the present invention is
A printing plate used to transfer ink onto a substrate.
A recess is formed on the surface having at least one convex portion at the bottom .
The height of at least one convex portion is smaller than the depth of the concave portion,
The printing plate has a plurality of grooves on the surface of the printing plate base material, and has a plurality of grooves.
Each of the plurality of grooves, the bottom side of the region of the grooves than the top portion of the convex portion is the printing plate to Rukoto to have a asymmetric shape wherein in a cross section perpendicular to the longitudinal direction of the groove ..

The eighth aspect of the present invention is
A printing plate used to transfer ink onto a substrate.
A recess is formed on the surface having at least one convex portion at the bottom.
Height of at least one of the protrusions is rather equal to the depth of the recess,
The top of the convex portion is linear and
Minimum value of the line width of the top portion of the convex portion is a printing plate you wherein <br/> that is 5μm or more 100μm or less.

A ninth aspect of the present invention is
The printing plate of the eighth aspect is characterized in that the maximum value of the straight line connecting two points on the boundary line defining the top of the convex portion is 5 μm or more and 100 μm or less.

A tenth aspect of the present invention is
The printing plate of the ninth aspect is characterized in that the maximum value of the straight line connecting the two points on the boundary line defining the top of the convex portion differs depending on the width of the concave portion.

The eleventh aspect of the present invention is
The printing plate of the ninth aspect is characterized in that the convex portion occupies 20% to 70% of the area of the concave portion in a top view.

A twelfth aspect of the present invention is
A method for producing a printed matter, which comprises a step of transferring ink onto the substrate using the printing plate according to any one of the seventh to eleventh aspects .

The printing plate manufacturing method may include a step of forming the recess of the printing plate by cutting with a cutting blade or by etching.

As described above, according to the present invention, when printing using an intaglio plate, it is possible to suppress protrusion and blurring due to ink bias.

It is a figure which shows the ink filling to the printing plate by the doctor member which concerns on 1st Embodiment of this invention. It is a front view which shows the mechanical structure of the printing apparatus which concerns on 1st Embodiment, and the operation state before transfer | transfer to a blanket. It is a front view which shows the operation state before transfer | transfer to the blanket of the printing apparatus which concerns on 1st Embodiment. It is a front view which shows the operation state after transfer to the printed matter of the printing apparatus which concerns on 1st Embodiment. It is a perspective view which shows the state before the cutting process in the manufacturing method of the printing plate which concerns on 1st Embodiment. It is a perspective view which shows the state after the cutting process in the manufacturing method of the printing plate which concerns on 1st Embodiment. It is a top view which shows the main part of the cutting blade used for the cutting process in 1st Embodiment. It is a top view which shows the printing plate in 1st Embodiment. FIG. 8 is a cross-sectional view taken along the line IX-IX of FIG. 8 showing a printing plate according to the first embodiment. It is sectional drawing which shows the cross-sectional shape of the ink formed on the printed matter in 1st Embodiment. It is sectional drawing which shows the printing plate base material before etching in the manufacturing method of the printing plate which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the printing plate base material after the first etching in the manufacturing method of the printing plate which concerns on 2nd Embodiment. It is sectional drawing which shows the printing plate base material which formed the resist layer after the first etching in the printing plate manufacturing method which concerns on 2nd Embodiment. It is sectional drawing which shows the printing plate base material after the second etching in the manufacturing method of the printing plate which concerns on 2nd Embodiment. It is sectional drawing which shows the printing plate manufactured by the manufacturing method of the printing plate which concerns on 2nd Embodiment. It is sectional drawing which shows the printing plate which concerns on 3rd Embodiment of this invention. It is sectional drawing which shows the mold base material and the printing plate in the middle of the manufacturing process which concerns on 4th Embodiment of this invention. It is sectional drawing which shows the printing plate which concerns on 4th Embodiment. It is a top view which shows the printing plate in 5th Embodiment of this invention. FIG. 19 is a cross-sectional view taken along the line XX-XX of FIG. 19 showing a main part of the printing plate according to the fifth embodiment. It is sectional drawing which shows the cross-sectional shape of the ink formed on the printed matter in 5th Embodiment. It is sectional drawing which shows the main part of the printing plate in 6th Embodiment of this invention. It is a top view which shows the main part of the cutting blade used for the cutting process in 7th Embodiment of this invention. It is a top view which shows the printing plate in 7th Embodiment. FIG. 24 is a cross-sectional view taken along the line XXV-XXV of FIG. 24 showing a printing plate according to a seventh embodiment. It is sectional drawing which shows the cross-sectional shape of the ink formed on the printed matter in 7th Embodiment. It is a perspective view for demonstrating the uneven structure of the printing plate adopted by the prior art. It is a top view view for demonstrating the structure of the printing plate in 8th Embodiment of this invention. FIG. 28 is a cross-sectional view taken along the line XXIX-XXIX of FIG. 28. FIG. 28 is a cross-sectional view taken along the line XXIX-XXIX of FIG. 28 according to a modified example of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 30. It should be noted that the embodiments of the present invention are not limited to the embodiments described below, and modifications such as design changes can be made based on the knowledge of those skilled in the art, and such modifications are added. The embodiment described can also be included in the scope of the embodiment of the present invention.

(Definition)
In the description of the present specification and the scope of claims, "ink" is a concept including an "ink film" formed by transfer of a transfer material such as a blanket to a transfer layer. Further, the "ink layer" is a concept formed by transferring "ink" to a base material and including a "printing pattern". Further, the "ink layer" is a concept including an "electrode", a "wiring (part)", and a "circuit" when the "ink" has conductivity.

In the description of the present specification and the scope of claims, the term "printed matter" is referred to as referring to a base material and an ink layer on the base material, and is a concept including a "printed circuit" and a "wiring board". is there.

As used herein, the term "pore" is referred to as referring to an exposed portion of a substrate formed when a "dent" is formed in a printed matter. That is, the “vacancy” refers to a through hole of the ink layer on the base material.

(First Embodiment)
FIG. 1 is a diagram showing ink filling into a printing plate by a doctor member according to the first embodiment of the present invention. Further, FIG. 2 shows the mechanical configuration of the printing apparatus according to the present embodiment and the operating state before transfer to the blanket, FIG. 3 shows the operating state of the printing apparatus according to the present embodiment before transferring to the blanket, and FIG. 4 shows the present. It is a front view which shows the operation state after transfer to the printed matter of the printing apparatus which concerns on embodiment, respectively.

In FIGS. 1 to 4, the printing apparatus 1 includes a blanket 2 and a printing plate (intaglio) 3. The blanket 2 is fixed to the surface of the rotatable blanket body 4, and the ink 6 is removably arranged on the object to be printed 5. The printing plate 3 is fixed to the upper surface of the printing plate fixing surface plate 9, and is arranged at a position where the ink 6 can be transferred to the printing surface of the blanket 2. The blanket body 4 is rotatably supported by the trolley 7, and the trolley 7 is movably supported by the gantry 8 on the gantry 8. The printed body 5 is fixed to the upper surface of the base material fixing surface plate 10.

The blanket 2 performs transfer printing by transferring and receiving ink on the pattern on the surface thereof. The surface of the blanket 2, that is, the printed surface, is made of a rubber layer. As the rubber material used as the rubber layer, various materials known as blankets can be used. These rubber materials are selected according to the ink and the type of solvent used in the ink, and those having solvent absorbency are preferable.

The rubber layer alone can be used as the blanket 2, but the rubber layer may be provided on the base base material. In the rubber layer made of the rubber material, the rubber material can be cured on the base base material, or the rubber material on the film can be bonded to the base base material. The base base material may be a flexible film or a thin metal plate because it is attached to the blanket body 4 at the time of printing, but a polyester film such as polyethylene terephthalate (PET) is used for cost and dimensional stability. , Or a polyimide film is suitable. Further, a primer layer and an adhesive layer are provided between the base base material and the silicone rubber layer, if necessary. Further, a cushion layer is provided under the base base material as needed. A sponge-like material can be used as the cushion layer. The blanket 2 is fixed to the substantially cylindrical blanket body 4 by winding both ends in the width direction with a mounting tool (not shown).

The details of the printing plate 3 will be described later, but the groove corresponding to the wiring is formed on the surface of a metal plate such as a copper plate or a nickel plate, or a glass plate, and the grooved surface is scratch-resistant by chrome plating or carbon plating. It forms a film. The groove is formed by cutting, etching, electroforming, sandblasting, or the like. The concave portion of the printing plate 3 is filled with ink at a constant speed by a doctor member (a portion indicated by reference numeral 1103 in FIG. 1).

As the ink 6, for example, a thermosetting and light-fired conductive ink can be used. If the ink is conductive, a printed matter (wiring board) having an ink layer as a wiring layer can be obtained. The conductive ink is a metal such as Au, Pt, Ag, Cu, Ni, Cr, Rh, Pd, Zn, Co, Mo, Ru, W, Os, Ir, Fe, Mn, Ge, Sn, Ga, In. Those containing fine particles, conductive metal oxide fine particles such as ITO (indium tin oxide), ZnO (zinc oxide), SnO2 (tin oxide), or metal nanowires are preferable. In the present embodiment, these can be used as a filler for the ink 6. As the conductive ink containing metal fine particles, for example, a conductive silver nanoink obtained by dispersing silver nanoparticles in an organic solvent can be used.

When the pattern to be created is a transparent electrode layer, a conductive polymer whose conductivity has been improved by doping or the like, for example, conductive polyaniline, conductive polypropyrole, conductive polythiophene (complex of polyethylene dioxythiophene and polystyrene sulfonic acid). Etc.) can be used.

In the above conductive silver nano ink, the solvent in the ink is dodecane or tetradecane. Any solvent can be used in the ink. For example, quick-drying inks have low boiling point solvents (MEK, ethanol, acetone, etc.) that dry at room temperature, water-based inks have water (purified water), and oil-based inks do not evaporate at room temperature (aliphatic hydrocarbons, glycol ethers, etc.) It is possible to use higher alcohol etc.). Depending on the type of solvent, the material of the blanket 2 having its absorbability can be selected.

The printed object 5 in the present embodiment is fixed to the upper surface of the base material fixing surface plate 10. The object to be printed 5 is, for example, a glass plate such as soda lime glass, low-alkali borosilicate glass, non-alkali aluminum borosilicate glass, or polyethylene terephthalate (PET), triacetyl cellulose (TAC), polymethyl methacrylate (PMMA), and the like. A plastic plate or a plastic film made of polycarbonate (PC) or the like is used. The object to be printed 5 can be, for example, a PET film having a thickness of 125 μm. As the printed body 5, another material, for example, a sheet (prepreg) made of glass fiber and epoxy resin used for an electronic substrate can be used, and other resin materials such as PET, paper, and non-woven fabric can be used. You may use it. The printed body 5 is not limited to a sheet-like material, and may be hollow or solid, and any flat surface or curved surface can be used as the printing surface.

In addition, the printing device 1 includes a control unit 11 in order to control each unit of the printing device 1. The feed mechanism for the blanket body 4, the carriage 7, the printing plate fixing surface plate 9, and the base material fixing surface plate 10 is electrically connected to the control unit 11. The control unit 11 is a well-known computer, and includes a CPU, a ROM, a RAM, an input / output port, a storage device, a display device, an input / output device, and the like interconnected by a data bus. The control unit 11 fills the printing plate 3 with the doctor member 1103 with ink, feeds and rotates and moves the blanket cylinder 4, and trolleys according to the operator's operation input, inputs from various sensors, and the control program stored in the ROM. Movement of 7, operation of the feed mechanism for the surface plate 9 for fixing the printing plate, surface plate 10 for fixing the base material, and operations such as heat curing and light firing for the ink on the object 5 to be printed, and drying for the blanket 2. It is configured so that the operations can be linked and controlled.

(Printing method)
Next, a printing method using the printing apparatus 1 configured as described above will be described. In the initial state and the completed state of the pre-printing process, the dolly 7 is stopped on the right side in the drawing as shown in FIG.

First, as shown in FIG. 1, the ink 6 is placed on the printing plate 3, and the ink 6 is moved on the printing plate 3 while being rolled in the direction of the arrow in FIG. 1 at a constant pressure by the doctor member 1103. , Ink 6 is filled in the pattern portion (recess) 25 of the printing plate 3. The speed at which the ink is filled by the doctor member 1103 is, for example, 150 mm / sec.

Next, as shown in FIG. 3, by moving the carriage 7 in the B1 direction and rotating the blanket body 4 in the direction of arrow A in the drawing, the ink 6 filled in the printing plate 3 is continuously contacted with the ink 6. The ink 6 is transferred to the printed surface of the blanket 2. The transfer rate to the blanket 2 can be, for example, 50 mm / sec. When the ink 6 contains a solvent, the printed surface of the blanket 2 has absorbency capable of absorbing the solvent in the ink 6, so that the wet spread of the ink 6 formed on the printed surface of the blanket 2 is suppressed. After that, by moving the carriage 7 in the direction of arrow B2 in the drawing, the blanket 2 to which the ink 6 is transferred is moved to the installation position of the printed object 5.

As shown in FIG. 4, the ink formed on the blanket 2 is transferred to the printing surface of the object to be printed 5 by the movement of the carriage 7 in the B2 direction and the rotation of the blanket body 4 in the A direction. The rotation speed of the printing surface of the blanket 2 is substantially the same as the moving speed of the carriage 7, whereby the ink 6 is pressed against the printed object 5 and transferred. The transfer speed to the printed matter 5 can be, for example, 200 mm / sec. The portion of the ink 6 that remains on the printed surface of the blanket 2 without being transferred is removed by, for example, a cleaning roller (not shown). In the present embodiment, the carriage 7 is moved at the time of transfer, but the relative positions of the blanket cylinder 4 and the printing plate fixing surface plate 9 and the relative positions of the blanket cylinder 4 and the base material fixing surface plate 10 As long as the change can be realized, the printing plate fixing surface plate 9 and the base material fixing surface plate 10 may be moved, and the trolley 7, the printing plate fixing surface plate 9, and the base material fixing surface plate 10 may be moved. May be moved respectively.

After that, the ink 6 transferred onto the printed object 5 is cured. This curing is performed by various means depending on the type and component of the conductive ink used, such as firing, heating, natural drying, ultraviolet curing, and cooling (when a conductive ink containing a thermoplastic material is used). be able to. In the case of heating, for example, an infrared heater can be used. In this way, a printed matter is obtained. When the swelling amount of the blanket 2 reaches a predetermined reference value, the printing apparatus may be provided with a function of drying the solvent absorbed by the blanket 2 during the printing standby.

As the material of the printing surface of the blanket 2, the type of ink used, and the type of solvent in the ink, various types other than those in the printing apparatus 1 can be selected.

Although the blanket 2 is fixed to the cylindrical blanket body 4 and used, the shape of the blanket at the time of use may be a curved surface or a flat surface other than the cylindrical shape. The printed body 5 may have a curved surface as a printed surface, such as a sheet-shaped product or a resin molded product.

(Formation of printing plate)
FIG. 5 is a perspective view showing a state before cutting in the printing plate manufacturing method according to the present embodiment, and FIG. 6 is a perspective view showing a state after cutting in the printing plate manufacturing method according to the present embodiment. is there. The printing plate 3 in the present embodiment is formed by cutting the surface of the printing plate base material 20. In FIG. 5, the printing plate base material 20 is formed by laminating a copper plating layer 22, a release layer 23, and a copper ballad layer 24 in this order from the inside on the surface of a cylinder 21 made of, for example, Al and Ni.

In FIG. 6, the printing plate base material 20 is rotated about the axis C, and the cutting blade 30 (see FIG. 7) acts in the radial direction toward the copper ballad layer 24 to perform cutting, thereby causing each other to perform cutting. A plurality of parallel recesses 25 are formed. The cutting depth can be, for example, 10 μm. The recess 25 may extend in the circumferential direction of the printing plate base material 20, or may extend in the spiral direction. The recesses are extended in the circumferential direction by alternately forming the recess 25 by cutting (cutting movement) and the relative movement (feeding movement) of the printing plate base material 20 and the cutting blade 30 along the axis C. be able to. Further, by simultaneously and continuously performing the cutting movement and the feeding movement, the concave portion can be extended in the spiral direction. It is also possible to change the width of the recess 25 by changing the cutting depth of the cutting blade toward the shaft C steplessly or in a plurality of steps.

FIG. 7 is a plan view showing a main part of a cutting blade used for cutting in the present embodiment, FIG. 8 is a plan view showing a printing plate in the present embodiment, and FIG. 9 is a plan view showing a printing plate in the present embodiment. FIG. 8 is a cross-sectional view taken along the line IX-IX of FIG. In the present embodiment, a concave portion 25 having one convex portion is formed at the bottom. The recess 25 is formed by using a cutting blade 30 as shown in FIG. The cutting blade 30 has a single nose portion 30a and two diagonal portions 30b and 30c sandwiching the nose portion 30a. The oblique portions 30b and 30c extend non-parallel and non-perpendicular to the cutting direction of the cutting blade 30. The cutting blade 30 preferably has at least one skewed portion adjacent to the nose portion 30a.

As shown in FIG. 9, the groove 26a is first formed by first cutting the surface of the printing plate base material 20 with the cutting blade 30, and then the printing plate base material 20 and the cutting blade 30 are formed. Is relatively moved (feeded) along the direction of the axis C (the width direction of the recess 25) by a distance (pitch p) smaller than the cutting width w of the groove 26a, and then the printing plate mother is moved by the cutting blade 30. The groove 26b is formed by cutting the surface of the material 20 again. By forming the grooves 26a and 26b, a recess 25 having one convex portion 28 at the bottom is formed. The other two recesses 25 are formed in the same manner.

After such a cutting step, a chrome-plated layer (not shown) is formed on the entire surface of the copper ballad layer 24 in order to improve wear resistance. Then, by peeling the copper ballad layer 24 from the peeling layer 23, a flat printing plate 3 as shown in FIG. 8 can be obtained.

As a result of making the distance (pitch p) between the grooves 26a and 26b smaller than the cut width w of the groove 26a, the tip of the convex portion 28 is set at a position lower than the upper surface of the printing plate 3. That is, the height h1 of the convex portion 28 is smaller than the depth d1 of the concave portion 25.

(Cross-sectional shape of ink transferred by printing plate)
FIG. 10 is a cross-sectional view showing the cross-sectional shape of the ink formed on the object to be printed in the present embodiment. The printed matter according to the present invention has at least one recess at the top. In the first embodiment of the present invention, as shown in FIG. 10, the printed matter 40 has at least one recessed portion having a depth smaller than the height of the ink layer 41. As shown in the figure, the ink transferred by the printing apparatus 1 including the printing plate 3 according to the present embodiment is cured and / or fired to obtain a printed matter 40 in which the ink layer 41 is formed on the printed matter 5. Be done. Note that FIG. 10 shows a cross-sectional shape of the object to be printed 5 in a cross section perpendicular to the printing surface. As shown in the figure, the thickness of the ink layer 41 after transfer and drying is relatively uniform over the entire area of the ink layer 41 as compared with the ink layer 42 before the improvement according to the present invention.

As described above, in the first embodiment, the printing plate 3 is formed with the concave portion 25 having the convex portion 28 at the bottom, and the height h1 of the convex portion 28 is smaller than the depth d1 of the concave portion 25. Is used to transfer the ink onto the printed object 5. Since the concave portion 25 of the printing plate 3 has a convex portion 28 having a height h1 smaller than the depth d1, it is possible to hold a relatively uniform amount of ink over the area of the concave portion 25, and transfer and dry. The thickness of the subsequent ink layer 41 can be made relatively uniform. Therefore, it is possible to suppress squeeze out and fading caused by the bias of the ink, and it is possible to preferably form a thick print layer and solidly coat a relatively large area. Since the printed matter in this embodiment is a circuit board using conductive ink, the circuit is short-circuited due to contact between the ink layers 41 adjacent to each other, and the resistance value of the circuit is increased or broken due to the faintness of the ink layer 41. The risk can be suppressed, and the increase in the resistance value of the circuit can be suppressed by forming a thick print layer or solid coating on a relatively large area, and the durability can be improved.

Further, in the present embodiment, since the recess 25 of the printing plate 3 is formed by cutting with the cutting blade 30, the cross-sectional shape of the recess 25 and the cross-sectional shape of the ink layer 41 can be freely controlled. Further, after the first groove 26a is formed on the surface of the printing plate base material 20 by the cutting blade 30, the cutting blade 30 is relatively moved (feed movement) by a distance (pitch p) smaller than the cutting width w of the groove 26a. ), And then the surface of the printing plate base material 20 is cut again with the cutting blade 30 to form the groove 26b, so that the convex portion 28 having a height h1 smaller than the depth d1 of the concave portion 25 can be easily formed. Can be formed.

(Second Embodiment)
Next, the second embodiment of the present invention will be described. In the second embodiment shown in FIGS. 11 to 15, the recess 125 of the printing plate is formed by etching. FIG. 11 is a cross-sectional view showing a printing plate base material before etching in the printing plate manufacturing method according to the present embodiment. Further, FIG. 12 is a cross-sectional view showing the printing plate base material after the first etching in the printing plate manufacturing method according to the present embodiment, and FIG. 13 is the first cross-sectional view in the printing plate manufacturing method according to the present embodiment. It is sectional drawing which shows the printing plate base material which formed the resist layer after etching. FIG. 14 is a cross-sectional view showing a printing plate base material after the second etching in the printing plate manufacturing method according to the present embodiment, and FIG. 15 is a printing plate manufactured by the printing plate manufacturing method according to the present embodiment. It is sectional drawing which shows.

The etching procedure in the second embodiment will be described. First, as shown in FIG. 11, the resist layer 131 is formed so as to surround the region forming the recess 125 in the surface of the flat printing plate base material 120. Next, as shown in FIG. 12, etching is performed using an etching solution to form a main groove 126a having a predetermined depth in the region sandwiched between the resist layers 131.

Next, as shown in FIG. 13, the resist layer 131 is removed from the printing plate base material 120, and the resist layer 132 is formed by leaving the region of the main groove 126a where the convex portion 128 is formed. Next, as shown in FIG. 14, etching is performed again to form two auxiliary grooves 126b in the printing plate base material 120. Finally, as shown in FIG. 15, by removing the resist layer 132 from the printing plate base material 120, a printing plate base material 120 having a concave portion 125 having one convex portion 128 formed at the bottom is obtained. By forming a chrome plating layer (not shown) on the entire surface of the printing plate base material 120, a flat printing plate 103 can be obtained.

In the printing plate 103 formed as described above, the tip of the convex portion 128 is located lower than the upper surface of the printing plate base material 120. That is, the height h2 of the convex portion 128 is smaller than the depth d2 of the concave portion 125. Therefore, according to the printing plate, the same effect as that of the first embodiment can be obtained.

(Third Embodiment)
Next, a third embodiment of the present invention will be described. FIG. 16 is a cross-sectional view showing a printing plate according to the present embodiment. In the third embodiment shown in FIG. 16, the recess 225 of the printing plate is formed by using a plating method. In the present embodiment, the plating steps using the photoresist layer formation, exposure, plating, and etching are repeated while changing the pattern to form the plating layers 231a, 231b, and 231c on the surface of the printing plate base material 220 in this order. To do. The plating layers 231a, 231b, and 231c are formed so that their opening areas gradually expand in this order (from bottom to top), thereby forming a concave portion 225 in which a convex portion 228 is formed between the grooves 226a and 226b. The printing plate base material 220 to have is obtained. It is also possible to obtain a printing plate base material 220 having a similar structure made of metal or resin by a 3D printer instead of plating. By forming a chrome plating layer (not shown) on the entire surface of the printing plate base material 220, a flat printing plate 203 can be obtained.

In the printing plate 203 formed as described above, the tip of the convex portion 228 is located at a position lower than the upper surface of the printing plate base material 220. That is, the height h3 of the convex portion 228 is smaller than the depth d3 of the concave portion 225. Therefore, according to the printing plate 203, the same effect as that of the first embodiment can be obtained.

(Fourth Embodiment)
Next, a fourth embodiment of the present invention will be described. FIG. 17 is a cross-sectional view showing a mold base material and a printing plate in the middle of the manufacturing process according to the present embodiment, and FIG. 18 is a cross-sectional view showing the printing plate according to the present embodiment. The fourth embodiment shown in FIGS. 17 and 18 uses a mold to form a printing plate 303. In the present embodiment, first, as shown in FIG. 17, by repeating the plating process using the photoresist layer formation, exposure, plating and etching, the plating layers 331a and 331b are formed on the surface of the mold base material 320. 331c is formed in this order to obtain mold 321. Then, a mold release layer 322 is formed on the entire surface of the mold 321 with a mold release agent, a plating layer 323 is formed by copper plating, a resin layer 324 is formed on the plating layer 323, and then the mold release layer 322 is used. By peeling off, the printing plate 303 is obtained. As a result, as shown in FIG. 18, it is possible to obtain the printing plate 303 in which the convex portion 328 is formed between the grooves 326a and 326b of the concave portion 325. It is also possible to obtain a mold 321 having a similar structure made of metal or resin by a 3D printer instead of plating.

In the printing plate 303 formed as described above, the tip of the convex portion 328 is located at a position lower than the upper surface of the printing plate 303. That is, the height h4 of the convex portion 328 is smaller than the depth d4 of the concave portion 325. Therefore, according to the printing plate 303, the same effect as that of the first embodiment can be obtained.

(Fifth Embodiment)
Next, a fifth embodiment of the present invention will be described. When a recess for solid coating a relatively large area is formed on the printing plate, the doctor member 1103 may bend in the recess having a large area, resulting in blurring due to ink bias. A fifth embodiment, shown in FIGS. 19 and 20, addresses this issue by forming a plurality of protrusions 428 within a single recess 425.

FIG. 19 is a plan view showing a printing plate 403 having three recesses 425. 20 is a cross-sectional view taken along the line XX-XX of FIG. 19 showing a main part of the printing plate in the present embodiment, and FIG. 21 shows a cross-sectional shape of the ink formed on the object to be printed in the present embodiment. It is a sectional view. The printing plate 403 is formed by cutting with the cutting blade 30 shown in FIG. 7 on the surface of the cylindrical printing plate base material 420 similar to that shown in FIG. That is, as shown in FIG. 20, the groove 426a is first formed by first cutting the surface of the printing plate base material 420 with the cutting blade 30, and then the printing plate base material 420 and the cutting blade are formed. The 30 and 30 are relatively moved (feeded) along the direction of the axis C (the width direction of the recess 425) by a distance (pitch p) smaller than the cutting width w of the groove 426a, and then the printing plate is moved by the cutting blade 30. The groove 426b is formed by cutting the surface of the base material 420 again. Similarly, by alternately repeating cutting and feed movement, third and fourth grooves 426c and 426d are formed. This forms a single recess 425 with three protrusions 428 at the bottom.

After such a cutting step, a chrome plating layer (not shown) is formed on the entire surface of the printing plate base material 420 in order to improve the abrasion resistance. Then, by peeling the copper ballad layer 24 from the peeling layer 23, a flat printing plate 403 as shown in FIG. 19 can be obtained.

By curing and / or firing the ink transferred by the printing apparatus 1 including the printing plate 403 according to the fifth embodiment, an ink layer 441 is formed on the printed matter 5 as shown in FIG. Printed matter 440 is obtained. In the present embodiment, as shown in the figure, the printed matter 440 has at least one recessed portion having a depth smaller than the height of the ink layer 441. Note that FIG. 21 shows a cross-sectional shape of the object to be printed 5 in a cross section perpendicular to the printing surface. As shown, the thickness of the ink layer 441 after transfer and drying is relatively uniform over the entire area of the ink layer 441 as compared with the ink layer 442 before the improvement according to the present invention.

In the fifth embodiment, as a result of making the interval (pitch p) of the grooves 426a, 426b, 426c, 426d smaller than the cut width w of these grooves 426a, 426b, 426c, 426d, the tip of the convex portion 428 is a printing plate. It is positioned lower than the upper surface of 403. That is, the height h5 of the convex portion 428 is smaller than the depth d5 of the concave portion 425. Therefore, according to the printing plate 403, the same effect as that of the first embodiment can be obtained. In particular, since a plurality of convex portions 428 are formed inside the single concave portion 425, the area of each concave portion 425 is formed. It is possible to further promote uniform retention of ink over a wide area, and even if the recess 425 has a relatively large area, it is possible to suitably suppress the possibility of blurring due to ink bias due to the deflection of the doctor member 1103. be able to.

In addition, by performing the same etching as in the second embodiment described above by forming resist layers at a plurality of locations inside a single recess, the height h5 of the convex portion 428 can be increased as in the fifth embodiment. It is also possible to create a printing plate smaller than the depth d5 of the recess 425, and the same effect as that of the fifth embodiment can be obtained.

(Sixth Embodiment)
Next, a sixth embodiment of the present invention will be described. In each of the above embodiments, a plurality of grooves are formed inside a single recess to form a convex portion between the plurality of grooves, but the depths of the grooves may be different from each other. it can.

FIG. 22 is a cross-sectional view showing a main part of the printing plate 503 having recesses 525 having a plurality of grooves formed therein. The printing plate 503 is formed by cutting with the cutting blade 30 shown in FIG. 7 on the surface of the cylindrical printing plate base material 520 similar to that shown in FIG. The cutting procedure is basically the same as that of the fifth embodiment, but in the sixth embodiment, five grooves 526a, 526b, 526c, 526d, 526e are formed, and the cutting depth of the cutting blade 30 is changed. The depth d61 of the grooves 526a and 526e at both ends of the recess 525, the depth d62 of the second and fourth grooves 526b and 526d from the left in the figure, and the depth d62 of the groove 526c in the center of the figure. Let d63 be a different value from each other. The same applies to the structure of the other recess 525 (not shown). The groove depth in the present embodiment is d61 <d62 <d63 so that the depth becomes larger toward the central groove, but the groove depth distribution is based on the viscosity of the ink, the drying speed, and the printed matter. It can be arbitrarily selected according to physical characteristics such as adhesiveness. Even when a single cutting blade 30 is used, the height of the convex portion 528 (here, the distance from the bottom of the deepest groove 526c) h60 is mutually changed by changing the pitch p mutually. It is also possible to change to. The tip of the convex portion 528 is located lower than the upper surface of the printing plate 503. That is, the height h60 of the convex portion 528 is smaller than the depth d60 of the concave portion 525 (in the present embodiment, the same depth as the depth d63 of the deepest groove 526c).

As described above, when a recess for solid coating a relatively large area is formed in the printing plate, the doctor member 1103 may bend in the recess having a large area, causing blurring due to ink bias. .. Therefore, in the sixth embodiment, since the groove is deepened from the edge of each recess 525 toward the center, the thickness of the ink layer transferred to the object to be printed is increased by increasing the amount of ink to be filled. Uniformity can be imparted.

(7th Embodiment)
Next, a seventh embodiment of the present invention will be described. In each of the above embodiments, the plurality of grooves formed within a single recess are symmetrical (ie, printing plates) in a cross section orthogonal to the longitudinal direction of the groove, at least in the region below the top of the convex portion. It has a shape (line symmetry with respect to a perpendicular line on the surface of the base material that passes through the center in the width direction of the groove). However, each of the plurality of grooves can have an asymmetrical shape in a cross section orthogonal to the longitudinal direction of the groove in a region on the bottom side of the groove rather than the top of the convex portion.

FIG. 23 is a plan view showing a main part of a cutting blade used for cutting in this embodiment. Further, FIG. 24 is a plan view showing the printing plate in the present embodiment, and FIG. 25 is a cross-sectional view taken along the line XXV-XXV of FIG. 24 showing the printing plate in the present embodiment. FIG. 26 is a cross-sectional view showing the cross-sectional shape of the ink formed on the object to be printed in the present embodiment. As shown in FIG. 23, the cutting blade 630 used for manufacturing the printing plate 603 (see FIG. 24) in the seventh embodiment has a single nose portion 630a and two skew portions 630b and 630c sandwiching the nose portion 630a. And have. The extending directions of the two oblique portions 630b and 630c are different from each other with respect to the cutting direction G of the cutting blade 630, and the angle α formed by one oblique portion 630b with respect to the cutting direction G is, for example, 20 °. The angle β formed by the other skewed portion 630c with respect to the cutting direction G is, for example, 70 °.

As shown in FIG. 25, the groove 626a is first formed by first cutting the surface of the printing plate base material 620 with the cutting blade 630, and then the printing plate base material 620 and the cutting blade 630 are formed. Is relatively moved (feeded) along the direction of the axis C (the width direction of the recess 625) by a distance (pitch p) smaller than the cutting width w of the groove 626a, and then the printing plate mother is moved by the cutting blade 630. The groove 626b is formed by cutting the surface of the material 620 again. Then, the groove 626c is formed by repeating this cutting movement and the feeding movement once more. By forming the grooves 626a, 626b, and 626c, a recess 625 having two convex portions 628 at the bottom is formed. The structure of the other recess 625 is the same.

After such a cutting step, a chrome-plated layer (not shown) is formed on the entire surface of the copper ballad layer 24 in order to improve wear resistance. Then, by peeling the copper ballad layer 24 from the peeling layer 23, a flat printing plate 603 as shown in FIG. 24 can be obtained.

As a result of making the interval (pitch p) of the grooves 626a, 626b, and 626c smaller than the cut width w of the groove 626a, the tip of the convex portion 628 is positioned lower than the upper surface of the printing plate 603. That is, the height h7 of the convex portion 628 is smaller than the depth d7 of the concave portion 625. Each of the plurality of grooves 626a, 626b, and 626c has a cross section orthogonal to the longitudinal direction of the groove (that is, a cross section shown in FIG. 25) in a region on the bottom side of the groove with respect to the top of the convex portion 628. Will have an asymmetrical shape.

By curing and / or firing the ink transferred by the printing apparatus 1 including the printing plate 603 according to the seventh embodiment, the ink layer 641 is formed on the printed matter 5 as shown in FIG. Printed matter 640 is obtained. In the present embodiment, as shown in the figure, the printed matter 640 has at least one recessed portion having a depth smaller than the height of the ink layer 641. Further, in the present embodiment, the ink layer 641 of the printed matter 640 is composed of a plurality of ridge-shaped portions, and each of the ridge-shaped portions of the ink layer 641 is a region on the top side of the ridge-shaped portion rather than the bottom portion of the recessed portion. Has an asymmetrical shape in a cross section orthogonal to the longitudinal direction of the ridge-shaped portion. Note that FIG. 26 shows a cross-sectional shape of the object to be printed 5 in a cross section perpendicular to the printing surface. As shown in the figure, the cross-sectional shape of the ink layer 641 after transfer and drying becomes asymmetrical corresponding to the cross-sectional shape of the cutting blade 630. The ink layer 641 has a peak portion 641a and two skew portions 641b and 641c sandwiching the peak portion 641a. The extending directions of the two skewed portions 641b and 641c are different from each other with respect to the normal direction H of the printed matter 5, and the angle formed by one skewed portion 641b with respect to the normal direction H is, for example, 20. The angle from ° to a predetermined range and the angle formed by the other skew portion 641c with respect to the normal direction H is, for example, from 70 ° to a predetermined range. Due to this, in the seventh embodiment, it is possible to provide a printed matter 640 having a different intensity of reflected light depending on the viewing direction.

(8th Embodiment)
Next, an eighth embodiment of the present invention will be described. In each of the above embodiments, the printing plate in which the height of the convex portion is smaller than the depth of the concave portion has been described, but the present invention is not limited to this. In the present embodiment, the case where the height of the convex portion is equal to the depth of the concave portion will be described. Among the elements constituting the printed matter and the printing plate according to the present embodiment, those having the same function are designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted.

Conventionally, when printing on a base material by gravure offset printing, the following characteristics and qualities are required.
[1] High-definition, uniform-shaped fine lines can be printed over a wide area.
More specifically
[2] The printed thin line does not have disconnection, short circuit, etc.
[3] The film thickness of the printed thin lines is stable.

In order to satisfy the above quality, for example, Patent Document 2 discloses the application of overprinting technology by an offset method in pattern formation that avoids pinholes and disconnections such as thick film printing, fine image printing, and solid printing. There is. It is stated that overprinting can prevent disconnection of the fine line pattern, pinholes due to clogging of the plate, expansion and contraction of the print pattern, and the like.

On the other hand, in order to satisfy the above quality, when printing a fine line pattern using gravure offset printing, the ink filled in the recesses of the printing plate must be reliably transferred onto the transfer layer having ink peelability. Is required. Further, in order to form a fine line pattern without disconnection, the recess is completely filled with ink by a doctor member, the filled ink surface is smoothed, and then contact with a transfer body having an ink-removable transfer layer is performed. Occasionally, it is necessary that the ink surface evenly contact the transfer layer.

However, when the line width of the printing pattern to be printed (here, a circuit for wiring) becomes thick, the doctor member rubs the bottom of the printing plate recess when filling the printing plate with ink by the doctor member. Therefore, there is a problem that the filling is not performed well. In addition, since the ink for gravure offset printing has low leveling property, the filling shape on the plate is directly transferred to the printed matter through the transfer layer, and there is a problem that a circuit having a desired line width and shape cannot be formed. is there. Therefore, since the shape of the thin wire differs from the design value, it becomes difficult to control the resistance value and the permittivity. In gravure offset printing, this problem becomes more prominent in a wide portion of the pattern as an attempt is made to form a high-definition print pattern.

Therefore, in the present embodiment, by providing the intaglio with a convex portion having a predetermined shape and size, when the doctor member fills the ink, the doctor member rubs the bottom of the intaglio and the ink filling is not performed well. Deter that. As a result, the structure of the printing circuit itself that can control the resistance value and permittivity of the wide line width part and the ink filling rate of the relatively thick line width part in the printing pattern are improved to realize this. It is possible to improve the surface smoothness of the filled ink.

In the eighth embodiment of the present invention, the recesses of the printing plate are formed by recesses having a width of about 10 μm to about 5 mm and a depth of about 5 μm to 20 μm. This embodiment is effective for filling ink in the recesses of the gravure offset printing plate having recesses having a width of 100 μm or more, and includes a plurality of convex portions periodically arranged in the recesses having a width of 100 μm or more. It is a print version. When the concave portion of the printing plate has a convex portion, the ink 6 filled in the concave portion has a pattern having an unfilled region in the convex portion, and the finally obtained printed matter has a through hole in which the ink 6 is not filled. Is periodically provided.

In this embodiment, in the printing plate, the height of at least one convex portion is equal to the depth of the concave portion. Specifically, the maximum value of the straight line connecting two points on the boundary line defining the top of the convex portion is 5 μm or more and 100 μm or less. Further, the maximum value may vary depending on the width of the recess. When the top of the convex portion is linear, the minimum value of the line width of the top of the convex portion is preferably 5 μm or more and 100 μm or less in order to exert the effect of the present invention. It is desirable that the convex portion occupies 20% to 70% of the area of the concave portion when viewed from above.

In the present embodiment, the recessed portion of the printed matter has an exposed portion where the substrate is exposed so that the depth of at least one recessed portion is equal to the height of the ink layer. Specifically, the maximum value of the straight line connecting two points on the boundary line defining the exposed portion is 5 μm or more and 100 μm or less. Further, the maximum value may vary depending on the width of the ink layer. When the exposed portion is linear, the minimum value of the line width of the exposed portion is preferably 5 μm or more and 100 μm or less in order to exert the effect of the present invention.

It is desirable that the pore group, which is an exposed portion formed on the printed matter, occupies an area of 20% to 70% of the area of the wiring (ink layer) when viewed from above. If it is less than 20%, when the doctor member 1103 fills the recess of the printing plate for gravure offset with the ink 6, there arises a problem that the bottom of the recess is rubbed or the filling amount is unstable and the printing film thickness becomes thin. The effect of the pore group is not seen. In this case, the resistance value, dielectric constant, etc. as designed in the pattern cannot be obtained. On the other hand, if the area is larger than 70%, the proportion occupied by the ink portion decreases, and if it is used as wiring, the resistance value becomes too high. The shape of the convex portion and the proportion of the convex portion need to be changed depending on the size of the concave portion as shown below.

Further, it is desirable that the surface of the gravure offset printing plate is smooth. As a result, printing is possible without causing ink leakage on the surface of the printing plate. It also suppresses abnormalities such as lack of a doctor. Here, the surface of the printing plate means the surface in contact with the doctor member 1103 or the inner surface of the patterned recesses (grooves) of the printing plate. The surface of the gravure offset printing plate can be smoothed by rough surface polishing, mirror polishing, and ultra-precision polishing (wrapping or polishing).

Further, since it is necessary to fill the recesses of the printing plate with the ink 6 and scrape the ink 6 on the flat surface portion of the printing plate, the doctor member 1103 is required to have some flexibility. Therefore, it is desirable that the doctor member 1103 is made of a metal such as stainless steel, a resin such as urethane, or a ceramic.

(Comparative evaluation in the eighth embodiment)
FIG. 27 is a perspective view for explaining the uneven structure of the printing plate adopted by the prior art, and FIG. 28 is a top view for explaining the structure of the printing plate according to the eighth embodiment of the present invention.

Two printing plates for gravure offset were prepared. The specifications of each version are as follows.
Plate a: The printing plate 1200 whose bird's-eye view is shown in FIG. 27 has a 1000 μm × 1000 μm electrode portion recess 1211, a 500 μm wide wiring portion recess 1212, a 150 μm wide wiring portion recess 1213, and a 30 μm wide wiring portion recess. It has 1214.
Plate b: The printing plate 1300 whose top view is shown in FIG. 28 has the same size of electrodes and wiring as the plate a, but is long so that the printed portion is 50% in the electrode portion recess 1311 of 1000 μm × 1000 μm. A group 1321 of elliptical convex portions having a shaft length of 50 μm and a minor shaft length of 30 μm is formed. Further, in the concave portion 1312 for the wiring portion having a width of 500 μm, a group 1322 of the convex portions of a circle having a diameter of 100 μm is formed so that the printed portion is 30%. Further, in the recess 1313 for the wiring portion having a width of 150 μm, a group 1323 of rectangular convex portions of 100 μm × 200 μm is formed so that the printed portion is 70%. The recess 1314 for the wiring portion having a width of 30 μm is the same as the a plate.

FIG. 29 shows a cross-sectional view taken along the line XXIX-XXIX of the printing plate 1300 of the b plate of FIG. 28. A group of convex portions 1322 is formed in the concave portion 1312 for the wiring portion. The group 1322 of the convex portion prevents the phenomenon that the bottom portion of the concave portion 1312 for the wiring portion is rubbed by the doctor member 1103. This prevention is the same for the convex portion group 1321 and the convex portion group 1323.

For the a plate and the b plate, recesses were formed by etching using a glass plate having a size of 120 mm × 120 mm × 3 mm.

Using these two types of gravure offset printing plates, gravure offset printing was performed in order to form a wiring pattern with a conductive silver paste on a polyethylene terephthalate substrate.

The polyethylene terephthalate base material used had a thickness of 125 μm, a length of 120 mm, and a width of 120 mm. Further, as the conductive silver paste, an ink having an angular velocity of 15 rad / sec and 8.8 Pa / s was used in a rheology measuring device. As the ink-removable transfer material, a silicone rubber manufactured by Kinyo Co., Ltd. having a rubber hardness (JIS A) of 45 ° and a rubber thickness of 0.6 mm was wound around a cylinder. Further, as the doctor member 1103, a regular type of a doctor blade manufactured by MDC was used.

As the gravure offset printing device, a commonly used printing device was used. The printing conditions were a doctor speed of 50 mm / sec, a transfer speed of 20 mm / sec, a contact width between the transfer body and the printing plate, and a uniform contact width between the transfer body and the polyethylene terephthalate substrate of 10 mm.

The printed type wiring board was produced by the following steps. First, the concave portion of the prepared printing plate for gravure offset was filled with the conductive silver paste by the doctor blade manufactured by MDC. Next, the transfer body was rotated and moved on a printing plate filled with ink to form a film of conductive silver paste on the silicone rubber. Finally, the transfer material on which the conductive silver paste film was formed was rotated and moved to the polyethylene terephthalate base material, and the conductive silver paste film was transferred onto the polyethylene terephthalate base material to form a printing circuit.

Under the above conditions, gravure offset printing was performed on the gravure offset printing plates 1200 and 1300 of the a and b plates, and 20 wiring boards corresponding to the a and b plates were produced.

In the printed circuit of the wiring board created by the a plate, holes were generated at random sizes in the electrode portion pattern of 1000 × 1000 μm. Further, holes were randomly generated in both the circuit having a width of 500 μm and the circuit having a width of 150 μm, and when the resistance value was measured, a large variation occurred. No voids were generated in the 30 μm wide circuit, and the resistance value was stable.

On the other hand, in the printed circuit of the wiring board produced by the b plate, the electrode portion pattern and the wiring pattern portion having holes at the designed locations could be formed. When the resistance value of the printing circuit was confirmed, the target resistance value was achieved and stable in all of the 500 μm width circuit, the 150 μm width circuit, and the 30 μm width circuit.

By using the gravure offset printing plate of the present embodiment, it is possible to obtain a printing pattern having high shape accuracy even in a circuit having a thick line width as in a circuit having a thin line width. In particular, since the effect becomes more remarkable as the circuit pattern has a relatively wide line width, it is suitable for forming a wiring board in which a thin wire circuit and a wide circuit are mixed. Further, according to the present embodiment, since it is possible to form an exposed portion (vacancy) on the base material at a portion as designed, it is possible to suppress protrusion and fading caused by ink bias. Become.

(Other)
The present invention is not limited to the embodiments shown in these embodiments, and all modifications, applications, and equivalents included in the ideas of the present invention defined by the scope of claims are included in the present invention. Therefore, the present invention should not be construed in a limited manner and can be applied to any other technique belonging within the scope of the idea of the present invention.

For example, in each of the above embodiments, the transfer is performed using a flat plate printing plate, but the transfer is not limited to this, and the transfer may be performed using a cylinder-shaped printing plate.

In each of the above embodiments, in the case where the cutting blades 30 and 630 are used, the cutting is performed by the cutting blades 30 and 630 having a single nose portion, but the cutting may be performed by the irregular cutting blade having a plurality of nose portions. good.

In each of the above embodiments, the ink is transferred to the printed object via the blanket, but the ink may be transferred directly from the printing plate to the printed object.

In each of the above embodiments, it is assumed that the printing pattern of the ink is formed on the object to be printed, but after the printing pattern is formed on the object to be printed, the object to be printed is removed and printing is performed. The shape may be maintained only by the pattern.

Further, in each of the above embodiments, the conductivity imparted to the ink can be used for various purposes such as determination of authenticity by energizing the print layer and use as an electric circuit member.

In the eighth embodiment described above, the depth of the concave portion of the printing plate is equal to the height of the convex portion, but the present invention is not limited to this. FIG. 30 is a cross-sectional view taken along the line XXIX-XXIX of FIG. 28 according to a modified example of the present invention. The printing plate 1400 shown in FIG. 30 is the same as the b plate according to the eighth embodiment except for the shape of the convex portion 1422. Among the elements constituting the printed matter and the printing plate according to this modification, those having the same function are designated by the same reference numerals as those in the eighth embodiment, and the description thereof will be omitted.

A group of convex portions 1422 is formed in the concave portion 1312 for the wiring portion. As shown in FIG. 30, the height of the convex portion group 1422 is smaller than the depth of the wiring portion concave portion 1312. The group 1422 of the convex portion prevents the phenomenon that the bottom portion of the concave portion 1312 for the wiring portion is rubbed by the doctor member 1103.

In the present invention, a printed matter having the above-mentioned pores is produced by using a printing plate according to any one of the first to seventh embodiments, that is, a printing plate in which the depth of the concave portion is larger than the height of the convex portion. Is possible. Further, using the printing plate according to the eighth embodiment, that is, the printing plate in which the depth of the concave portion is equal to the height of the convex portion, a printed matter having a recess at the top (but not having an exposed portion) is manufactured. Is also possible.

Claims (14)

A printed matter composed of a base material and an ink layer on the base material.
At least one recess is closed at the top,
The depth of at least one recess is smaller than the height of the ink layer.
The ink layer is composed of a plurality of ridge-shaped portions.
Each ridged portions of the ink layer, in the region of the top side of the ridged portion than the bottom of the recess, the Rukoto to have a asymmetric shape in a cross section perpendicular to the longitudinal direction of the ridge-shaped portion Characterized printed matter. A printed matter composed of a base material and an ink layer on the base material.
With at least one recess at the top
The recess, as the depth of the at least one of said recess equals the height of the ink layer, possess an exposed portion of said substrate is exposed,
The exposed portion is linear and
The minimum value of the line width of the exposed portion is marked you wherein a is 5μm or more 100μm or less Surimono. The printed matter according to claim 2 , wherein the maximum value of a straight line connecting two points on a boundary line defining the exposed portion is 5 μm or more and 100 μm or less. The printed matter according to claim 3 , wherein the maximum value of the straight line connecting the two points on the boundary line defining the exposed portion differs depending on the width of the ink layer. The printed matter according to claim 3 , wherein the exposed portion occupies 20% to 70% of the area of the ink layer in a top view. The printed matter according to any one of claims 1 to 5 , wherein the ink layer is provided as a wiring layer. A printing plate used to transfer ink onto a substrate.
A recess is formed on the surface having at least one convex portion at the bottom .
The height of at least one convex portion is smaller than the depth of the concave portion,
The printing plate has a plurality of grooves on the surface of the printing plate base material, and has a plurality of grooves.
Wherein the plurality of respective grooves, the bottom side of the region of the grooves than the top portion of the convex portion, the printing plate to the Rukoto to have a asymmetric shape wherein in a cross section perpendicular to the longitudinal direction of the groove. A printing plate used to transfer ink onto a substrate.
A recess is formed on the surface having at least one convex portion at the bottom.
Height of at least one of the protrusions is rather equal to the depth of the recess,
The top of the convex portion is linear and
Minimum value of the line width of the top portion of the convex portion, the printing plate you wherein a is 5μm or more 100μm or less. The printing plate according to claim 8 , wherein the maximum value of a straight line connecting two points on a boundary line defining the top of the convex portion is 5 μm or more and 100 μm or less. The printing plate according to claim 9 , wherein the maximum value of a straight line connecting two points on a boundary line defining the top of the convex portion differs depending on the width of the concave portion. The printing plate according to claim 9 , wherein the convex portion occupies 20% to 70% of the area of the concave portion in a top view. A method for producing a printed matter, which comprises a step of transferring ink onto the base material using the printing plate according to any one of claims 7 to 11 . A method for manufacturing a printing plate, which comprises a step of forming the recess of the printing plate according to any one of claims 7 to 11 by cutting with a cutting blade. A method for producing a printing plate, which comprises a step of forming the recess of the printing plate according to any one of claims 7 to 11 by etching.

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