JP5934820B1 - Doctor blade device, printing device, printing method, and method for manufacturing wiring board - Google Patents

Abstract

A doctor blade device capable of suppressing the occurrence of printing defects is provided. A doctor blade device 30 that slides on a plate-shaped intaglio 90 includes a blade body 31 having a front surface 313 positioned in the forward direction in the direction of travel of the doctor blade device 30, and a vicinity of a tip portion 311 of the blade body 31. , The tip portion 341 provided in front of the front surface 313, and the tip portion 341 is disposed so as to be separated from the first end portion 342 that contacts the front surface 313 and the intaglio 90. And an end portion 343. [Selection] Figure 3

Description

  The present invention relates to a doctor blade device, a printing device, a printing method, and a method for manufacturing a wiring board.

  There is known a technique that includes a doctor blade opposed to an intaglio, scrapes off excess ink on the intaglio by sliding on the intaglio of the doctor blade, and fills the intaglio with ink. (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 9-300574

  In the flat intaglio, after the excess ink is scraped off by the doctor blade as in the above technique, the doctor blade is separated from the intaglio in order to transfer the ink filled in the intaglio to the transfer object. At this time, if the ink is in contact with the tip of the doctor blade, the ink may hang down from the tip of the doctor blade. For this reason, when the doctor blade is pressed again against the intaglio, the icicle-shaped ink that hangs down from the tip of the doctor blade also spreads and wraps around the back of the doctor blade (so-called reverse side occurs), resulting in poor printing. There is a problem that it may occur.

  The problem to be solved by the present invention is to provide a doctor blade device, a printing device, a printing method, and a method for manufacturing a wiring board that can suppress the occurrence of printing defects.

[1] A doctor blade device according to the present invention slides on a plate-like intaglio and has a blade body having a first main surface positioned forward in the direction of travel of the doctor blade device, and the blade body. An ink holding portion provided in front of the first main surface in the vicinity of the tip, wherein the ink holding portion has a first end contacting the first main surface, and the intaglio plate. possess a second end portion disposed so as to be separated, the said ink holding portion, the conductive the portion between said first end and the second end is present on the intaglio The conductive ink can be held by contact with the conductive ink and satisfies the following expression (1) .
1 mm ≦ A ≦ 5 mm (1)
However, in the above formula (1), A is the distance from the tip of the blade body to the first end in the extending direction of the blade body.

[ 2 ] In the above invention, the following formula (2) may be satisfied.
30 ° ≦ B ≦ 150 ° (2)
However, in the above equation (2), B is an angle formed by the first main surface and a virtual straight line passing through the first end portion and the second end portion of the ink holding portion. .

[ 3 ] In the above invention, the ink holding portion extends between the first end portion and the second end portion, and is separated from the first main surface in the extending direction of the blade body. Accordingly, an inclined surface may be inclined so as to approach the tip of the blade body.

[ 4 ] In the above invention, the blade main body further includes a plate-like portion mounted on the first main surface, and the plate-like portion has a tip of the plate-like portion positioned near the tip of the blade main body. The tip of the plate-like part may constitute the ink holding part.

[ 5 ] In the above invention, the blade holder further includes a blade holder for holding the blade main body, the blade holder supporting the first main surface, and the first main surface of the blade main body. A second support part that supports a second main surface on the opposite side of the first support part, the first support part projecting more than the second support part in the extending direction of the blade body, The tip of the first support part may constitute the ink holding part.

[6] printing apparatus according to the present invention, the above-described doctor blade device, a base for supporting the intaglio, a supply device for supplying said conductive ink to said intaglio, the base and the said doctor blade And a moving mechanism for relative movement.

[ 7 ] A printing method according to the present invention is a method of printing a conductive ink using a flat intaglio, and includes a first step of preparing the doctor blade device, the intaglio and the doctor blade device. And a second step of filling the concave pattern of the intaglio with the conductive ink by the blade body, and the conductive material scraped off by the blade body in the second step. The ink is in contact with at least a part of the ink holding part.

[ 8 ] In the above invention, the following expression (3) may be satisfied.
| C | ≦ 90 ° ・ ・ ・ (3)
However, in the above equation (3), C is an extension of an imaginary straight line passing through a direction substantially perpendicular to the intaglio and the first end portion and the second end portion of the ink holding portion. The angle formed by the current direction.

[ 9 ] In the above invention, the following formula (4) may be satisfied.
0.1 mm ≦ D ≦ 5 mm (4)
However, in the above equation (4), D is a distance from the intaglio to the second end in a direction perpendicular to the intaglio.

[ 10 ] In the above invention, after the second step, a third step of receiving the conductive ink from the intaglio to the transfer member, and a fourth step of transferring the conductive ink from the transfer member to the substrate. And a process.

[11] A method for manufacturing a wiring board according to the present invention includes a printing step of forming a printing pattern on the substrate by the printing method and a drying step of drying the printing pattern.

  According to the present invention, the ink holding portion is provided in front of the first main surface of the doctor blade device, and the conductive ink is held in the ink holding portion. Thereby, since the conductive ink which hangs down from a doctor blade apparatus moves ahead, generation | occurrence | production of the printing defect by a back can be suppressed.

FIG. 1 is a plan view showing a printing apparatus according to an embodiment of the present invention. FIG. 2 is a side sectional view showing a printing apparatus according to an embodiment of the present invention. FIG. 3 is a view showing a doctor blade device according to an embodiment of the present invention, FIG. 3 (a) is a perspective view, and FIG. 3 (b) is IIIb-IIIb in FIG. 3 (a). It is sectional drawing along a line. FIG. 4 is a partially enlarged view of a portion IV in FIG. FIG. 5 is a view showing a modification of the doctor blade device according to the embodiment of the present invention, and is an enlarged cross-sectional view of the tip of the doctor blade device. FIG. 6 is a process diagram showing a method of manufacturing a wiring board according to an embodiment of the present invention. FIG. 7 is a flowchart showing a filling process, illustrating a method for manufacturing a wiring board according to an embodiment of the present invention. FIG. 8A is a diagram showing step S31 in FIG. 7, and FIG. 8B is a diagram showing step S32 in FIG. FIG. 9 is a cross-sectional view for explaining the positional relationship between the doctor blade device and the intaglio according to one embodiment of the present invention. FIG. 10 is a cross-sectional view showing a state in which the doctor blade device according to the embodiment of the present invention slides on the intaglio. FIG. 11A is a diagram showing step S33 in FIG. 7, and FIG. 11B is a diagram showing step S34 in FIG. FIG. 12 is a partially enlarged view of the XII portion of FIG. FIG. 13A and FIG. 13B are views showing a method of manufacturing a wiring board according to an embodiment of the present invention, and are sectional views (part 1) for explaining a receiving process. FIG. 14 is a view showing the method for manufacturing a wiring board according to the embodiment of the present invention, and is a sectional view (No. 2) for explaining the receiving process. FIG. 15A and FIG. 15B are views showing a method for manufacturing a wiring board according to an embodiment of the present invention, and are sectional views (part 1) for explaining a transfer process. FIG. 16A and FIG. 16B are views showing a method of manufacturing a wiring board according to an embodiment of the present invention, and are sectional views (part 2) for explaining a transfer process. FIG. 17 is a cross-sectional view showing a modified example of the doctor blade device according to the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in order to make the features of the present invention easier to understand, the drawings used in the following description may show the main parts in an enlarged manner for convenience, and the dimensional ratios of the respective components are the same as the actual ones. Not necessarily.

  1 is a plan view showing a printing apparatus according to an embodiment of the present invention, FIG. 2 is a side sectional view showing a printing apparatus according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. FIG. 3 (a) is a perspective view, FIG. 3 (b) is a cross-sectional view taken along line IIIb-IIIb of FIG. 3 (a), and FIG. 4 is a diagram of FIG. 3 (b). It is the elements on larger scale of the IV section.

  The printing apparatus 1 in the present embodiment is an apparatus that manufactures the wiring board 100 (see FIG. 16B) by printing the conductive ink M on the base 110 by a gravure offset printing method.

  The wiring board 100 includes a base material 110 and a conductor layer 120. The base material 110 is a base material having insulation properties such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide (PI), and the like. The conductor layer 120 is formed by curing the conductive ink M transferred onto the substrate 110 by the printing apparatus 1. The conductive layer 120 includes a conductive material containing silver, copper, nickel, tin, bismuth, zinc, indium, palladium, graphite, and the like, an acrylic resin, a polyester resin, an epoxy resin, a vinyl resin, a urethane resin, a phenol resin, It is composed of a binder resin containing a polyimide resin or the like. The binder resin may be omitted from the material constituting the conductor layer 120.

  In FIG. 16B, reference numeral 120 denotes a conductor layer after the conductive ink M is cured in a drying furnace 85 (described later). Moreover, in the same figure, the code | symbol (100) shows the wiring board which has the conductor layer 120 after having been effective in the drying furnace 85. FIG. The “wiring board 100” in the present embodiment corresponds to an example of the “wiring board” in the present invention, and the “base material 110” in the present embodiment corresponds to an example of the “base material” in the present invention.

  Note that the conductive ink M of the present embodiment is a material having a viscosity of 5 Pa · s to 50 Pa · s. Such a conductive ink M is configured by mixing various additives and a solvent in addition to the material constituting the conductor layer 120 described above. The solvent may be appropriately selected according to the type of binder resin to be used. For example, when a polyester resin is used as the binder resin, cyclohexyl acetate, butyl carbitole acetate, 2-butoxyethyl acetate, isobutyl is used. Examples thereof include alcohol, 2-ethylbutyl alcohol, ethyl carbitol, carbitol acetate, butyl carbitol acetate, butyl cellosolve, and isophorone. Examples of the additive include a curing agent, a coupling agent, and a corrosion inhibitor. The “conductive ink M” in the present embodiment corresponds to an example of the “conductive ink” in the present invention.

  As shown in FIGS. 1 and 2, the printing apparatus 1 includes a plate table 10, a base material table 20, a doctor blade device 30, a doctor mount 40, a dispenser 50, a transfer roller 60, a moving mechanism 71, 72, an apparatus frame 80, and a drying furnace 85.

  The plate table 10 is supported horizontally by the apparatus frame 80 and can be moved in parallel along the X direction by the moving mechanism 71. The plate table 10 has a holding surface 11 on which a flat intaglio 90 (gravure plate) is placed. The holding surface 11 is provided with a plurality of suction ports (not shown) that can hold the intaglio 90 by suction. The method for fixing the intaglio 90 to the plate table 10 is not particularly limited to this. Incidentally, as the moving mechanism 71, for example, a ball screw mechanism using a motor can be exemplified. The “plate table 10” in the present embodiment corresponds to an example of the “base” in the present invention, and the “moving mechanism 71” in the present embodiment corresponds to an example of the “moving mechanism” in the present invention.

  The intaglio 90 of the present embodiment is a flat intaglio, and a concave pattern 92 is formed on the upper surface 91 by etching a metal layer made of copper or the like. The concave pattern 92 is a pattern corresponding to the conductor layer 120 of the wiring board 100. Such a concave pattern 92 may be, for example, a stripe pattern in which a plurality of fine lines are arranged in parallel to each other, or first and second fine lines (not shown) extending in different directions. It may be a mesh-like (mesh) pattern that intersects each other. When the concave pattern has a mesh shape (mesh shape), a geometric pattern obtained by repeating various graphic units (for example, n-gons such as triangles and quadrangles, circles, ellipses, stars, etc.) It can be used as the shape of the unit mesh of the pattern. In the example shown in FIG. 1, only the concave pattern 92 of the intaglio plate 90 along the Y-axis direction is shown, but actually the concave pattern 92 is not only along the Y-axis direction but also in various directions. It is extended. The “intaglio 90” in the present embodiment corresponds to an example of the “intaglio” in the present invention, and the “concave pattern 92” in the present embodiment corresponds to an example of the “concave pattern” in the present invention.

  The substrate table 20 is horizontally supported by the apparatus frame 80 and can be moved in parallel along the X direction by the moving mechanism 72. The plate table 10 has a holding surface 21 on which a substrate 110 that is a printing medium is placed. Similar to the holding surface 11 of the plate table 10 described above, a plurality of suction ports are opened on the holding surface 21 so that the substrate 110 can be sucked and held. The method for fixing the substrate 110 to the substrate table 20 is not particularly limited to this. Incidentally, as the moving mechanism 72, for example, a ball screw mechanism using a motor can be exemplified.

  A suction device (not shown) is juxtaposed in the vicinity of the standby position of the substrate table 20, and the substrate 110 placed on the substrate table 20 is transferred to the drying furnace 85 by the suction device. The Examples of the drying furnace 85 include an IR (far infrared) drying furnace and a hot air drying furnace. The printed pattern (conductive ink M) transferred onto the substrate 110 is heated and cured by passing through the drying furnace 85, whereby the conductor layer 120 of the wiring board 100 is formed.

  The doctor blade device 30 is disposed above the intaglio plate 90 so as to face the intaglio plate 90. As shown in FIGS. 3 (a) and 3 (b), the doctor blade device 30 includes a blade body 31 and a blade holder 32. I have. The “doctor blade device 30” in the present embodiment corresponds to an example of the “doctor blade device” in the present invention.

  The blade body 31 is used to fill the concave pattern 92 formed on the upper surface 91 of the intaglio 90 with the conductive ink M and scrape the remaining conductive ink M on the upper surface 91 of the intaglio 90. The blade body 31 has a width corresponding to the intaglio 90 in the width direction (Y-axis direction). The blade body 31 is slidable in contact with the upper surface 91 of the intaglio 90 at the distal end portion 311 and is supported by the blade holder 32 on the proximal end portion 312 side.

  The blade body 31 includes a front surface 313 positioned forward in the traveling direction of the doctor blade device 30 and a rear surface 314 positioned opposite to the front surface 313 (that is, positioned rearward in the traveling direction of the blade device 30). ,have. In this embodiment, when the doctor blade device 30 is arranged in a posture for scraping off the conductive ink M on the intaglio plate 90 (see FIG. 2), the front surface 313 is in a posture to face downward so as to face the intaglio plate 90, and the rear surface 314 Takes a posture facing upward.

  The “blade body 31” in the present embodiment corresponds to an example of the “blade body” in the present invention, and the “front surface 313” in the present embodiment corresponds to an example of the “first main surface” in the present invention. The “rear surface 314” in the embodiment corresponds to an example of the “second main surface” in the present invention.

  The blade holder 32 supports the blade body 31 from the base end 312 side of the blade body 31, and includes a first holder member 33, a second holder member 35 that faces the first holder member 33, and And a backing plate 36 and a fixture 37. A gap is formed between the first and second holder members 33 and 35. The first and second holder members 33 and 35 are disposed substantially parallel to each other. The blade body 31 is inserted between the first and second holder members 33 and 35, and the blade The blade body 31 can be supported by sandwiching the body 31 from the front and back (front and back).

  The second holder member 35 supports the blade main body 31 by pressing the rear surface 314 of the blade main body 31 toward the first holder member 33 through the contact plate 36. The abutting plate 36 is disposed so as to partially protrude from the distal end portion 351 of the second holder member 35 in the extending direction of the blade body 31, and reinforces the support of the blade body 31 by the second holder member 35. And a function of making the doctor pressure applied to the intaglio 90 uniform.

  On the other hand, the first holder member 33 supports the blade body 31 from the front surface 313 of the blade body 31. The first holder member 33 has a support portion 34 at a portion that contacts the front surface 313 of the blade body 31. The distal end portion 341 of the support portion 34 (first holder member 33) protrudes from the distal end portion 351 of the second holder member 35 in the extending direction of the blade body 31.

  In the present embodiment, the tip portion 341 of the support portion 34 is provided in the vicinity of the tip portion 311 of the blade body 31. Note that the tip end portion 341 of the support portion 34 does not protrude from the tip end portion 311 of the blade body 31, and as a result, the support portion 34 is attached to the blade body 31 to support the front surface 313 of the blade body 31. A step is formed by the tip 341 of the portion 34. In the present embodiment, the vicinity of the tip portion 311 of the blade body 31 means that the distance from the tip portion 311 of the blade body 31 to the first end portion 342 satisfies the following expression (6).

  The front end portion 341 of the present embodiment is disposed so as to be separated from the first end 342 that contacts the front surface 313 of the blade body 31 and the first end as well as from the intaglio 90 in a side sectional view. A second end portion 343, and the tip end portion 341 is a surface extending between the first and second end portions 342 and 343. In the present embodiment, the tip 341 is a surface that substantially coincides with the virtual straight line IL passing through the first and second ends 342 and 343 in a side sectional view.

  In the present embodiment, the portion corresponding to the second end portion 343 has a square shape, but is not particularly limited thereto, and may be chamfered in an R shape. The R shape is a substantially arc-shaped continuous curve. In this case, the end of the R shape on the side away from the blade body 31 corresponds to the second end portion 343. By chamfering the portion corresponding to the second end 343 into an R shape, it is possible to suppress the intaglio 90 from being lost when the support portion 34 contacts the intaglio 90.

The front surface 313 of the blade body 31 and the tip portion 341 (tip surface) extend in different directions, so that the front surface 313 and the tip portion 341 (tip surface) are not positioned substantially on the same plane. ing. In this case, in the doctor blade device 30, the following expression (5) is preferably satisfied.
30 ° ≦ B ≦ 150 ° (5)
However, in the above equation (5), B is an angle formed by the front surface 313 and the virtual straight line IL.

  In addition, although the front-end | tip part 341 of this embodiment is extended in the direction substantially perpendicular | vertical with respect to the front surface 313, it is not limited to this in particular. FIG. 5 is a view showing a modification of the doctor blade device according to the embodiment of the present invention, and is an enlarged sectional view of the tip of the doctor blade device.

  For example, as shown in FIG. 5, the tip 341 of the present embodiment is inclined so as to approach the tip 311 of the blade body 31 as it moves away from the front surface 313 of the blade body 31 in the extending direction of the blade body 31. It may be an inclined surface.

  When the doctor blade device 30 is disposed in a posture in which the doctor blade device 30 is opposed to the intaglio plate 90 and the conductive ink M on the intaglio plate 90 is scraped off, the front end portion 341 of the support portion 34 is lowered so as to face the intaglio plate 90. (See FIG. 2). In the present embodiment, when the doctor blade device 30 slides on the intaglio plate 90, the conductive ink scraped by the blade body 31 in a region surrounded by the front surface 313, the tip portion 341, and the upper surface 91 of the intaglio plate 90. M is stored.

In the present embodiment, from the relationship with the amount (volume) of the conductive ink M to be stored, the following equation (6) is established in the doctor blade device 30 of the present embodiment.
1 mm ≦ A ≦ 5 mm (6)
However, in the above equation (6), A is the distance from the tip 311 of the blade body 31 to the first end 342 in the extending direction of the blade body 31.

  The first and second holder members 33 and 35 are connected by a fixture 37 as shown in FIGS. 3 (a) and 3 (b). The fixing tool 37 is for preventing the blade body 31 from falling off the blade holder 32, and includes fastening bolts arranged at substantially equal intervals along the width direction of the blade body 31. The blade main body 31 can be fixed to the blade holder 32 by tightening the fastening bolt that is the fixing tool 37.

  The “blade holder 32” in the present embodiment corresponds to an example of the “blade holder” in the present invention, and the “first holder member 33” in the present embodiment corresponds to an example of the “first support portion” in the present invention. The “second holder member 35” in the present embodiment corresponds to an example of the “second support portion” in the present invention, and the “support portion 34” in the present embodiment corresponds to the “plate-shaped portion” in the present invention. This corresponds to an example, the “tip portion 341” in the present embodiment corresponds to an example of the “ink holding portion” in the present invention, and the “virtual straight line IL” in the present embodiment corresponds to an example of the “virtual straight line” in the present invention. To do.

  Returning to FIG. 1 and FIG. 2, the doctor mount 40 is a mount to which the doctor blade device 30 can be attached and detached. The doctor mount 40 has a mechanism that can move up and down, and can approach or leave the intaglio 90 held by the plate table 10. As a mechanism for moving the doctor mount 40 up and down, for example, a rack and pinion gear mechanism using a motor or the like can be exemplified.

  The doctor table 40 is lowered, and the plate table 10 is moved in the X direction by the moving mechanism 71 in a state in which the tip 311 of the blade body 31 is in contact with the upper surface 91 of the intaglio plate 90. The upper conductive ink M is coated and scraped off.

  In the present embodiment, the plate table 10 is horizontally moved by the moving mechanism 71. However, the doctor table 40 and the plate table 10 are not particularly limited as long as the doctor table 40 and the plate table 10 are relatively movable. For example, although not particularly illustrated, the doctor frame may be moved horizontally with respect to the plate table by the moving mechanism, or a moving mechanism is provided for each of the doctor frame and the plate table, and under the synchronous drive of these moving mechanisms, The doctor mount and the plate table may be moved relative to each other.

  The dispenser 50 is a device that supplies the conductive ink M onto the intaglio plate 90, and is provided in the vicinity of the doctor blade device 30. The dispenser 50 is movable along the Z direction together with the doctor blade device 30. In the present embodiment, the doctor blade device 30 and the dispenser 50 are operated under synchronous drive, but may be operated independently. In this case, the doctor blade device 30 may be operated after the dispenser 50 is operated. The “dispenser 50” in the present embodiment corresponds to an example of the “supply device” in the present invention.

  The transfer roller 60 includes a blanket cylinder 61 and a blanket 62. The blanket cylinder 61 is supported so as to be rotatable about its central axis. The blanket 62 is made of, for example, silicone rubber or the like, and is wound around the outer periphery of the blanket cylinder 61 via an adhesive layer (not shown). The transfer roller 60 can be driven to rotate by a motor (not shown). The transfer roller 60 can be moved up and down in the Z direction by, for example, a rack and pinion gear mechanism (not shown). In this case, the transfer roller 60 is lowered so that it can come into contact with the intaglio 90 placed on the plate table 10 or the substrate 110 placed on the substrate table 20. The “transfer roller 60” in the present embodiment corresponds to an example of the “transfer body” in the present invention.

  Next, a method for manufacturing the wiring board 100 using the printing apparatus 1 will be described. FIG. 6 is a process diagram showing a method of manufacturing a wiring board according to an embodiment of the present invention.

  As shown in FIG. 6, the manufacturing method of the wiring board 100 of this embodiment includes a printing step S10 and a drying step S60. In the following description, first, the printing step S10 will be described in detail with reference to FIGS. The “printing step S10” in the present embodiment corresponds to an example of the “printing step” in the present invention, and the “drying step S60” in the present embodiment corresponds to an example of the “drying step” in the present invention.

  FIG. 7 is a view showing a method of manufacturing a wiring board according to an embodiment of the present invention, and is a flowchart showing a filling process, FIG. 8 (a), FIG. 8 (b), FIG. 11 (a), and FIG. (B) is a diagram showing each step of FIG. 6, FIG. 9 is a sectional view for explaining the positional relationship between the doctor blade device and the intaglio according to one embodiment of the present invention, and FIG. Sectional drawing which shows the state which the doctor blade apparatus which concerns on embodiment slides on an intaglio, FIG. 12 is the elements on larger scale of the XII part of FIG.11 (b), FIG.13 (a), FIG.13 (b), FIG. 14 is a view showing a method for manufacturing a wiring board according to an embodiment of the present invention, and is a cross-sectional view for explaining a receiving process, FIG. 15 (a), FIG. 15 (b), FIG. ) And FIG. 16B are diagrams showing a method of manufacturing a wiring board according to an embodiment of the present invention, and a transfer process. Description is a cross-sectional view for the.

  As shown in FIG. 6, the printing process S10 of the present embodiment includes a preparation process S20, a filling process S30, a receiving process S40, and a transfer process S50. “Preparation step S20” in the present embodiment corresponds to an example of “first step” in the present invention, and “filling step S30” in the present embodiment corresponds to an example of “second step” in the present invention. The “accepting step S40” in the present embodiment corresponds to an example of the “third step” in the present invention, and the “transfer step S50” in the present embodiment corresponds to an example of the “fourth step” in the present invention.

  First, in preparation process S20, the doctor blade apparatus 30 of this embodiment is prepared. Next, in the filling step S30, as shown in FIG. 8A, first, the doctor blade device 30 that has been waiting at a predetermined standby position is lowered (moved in the −Z direction) (step S31 in FIG. 7), and the blade The front end portion 311 of the main body 31 is brought into contact with the upper surface 91 of the intaglio 90.

When the doctor blade device 30 is arranged in a posture to scrape the conductive ink M on the intaglio plate 90, the doctor blade device 30 is inclined by a predetermined angle with respect to the upper surface 91 of the intaglio plate 90 as shown in FIG. Become posture. In this case, the doctor blade device 30 (specifically, the blade body 31) is held so that the following expression (7) is established.
| C | ≦ 90 ° (7)
However, in the above equation (7), C is an angle formed by a direction substantially perpendicular to the intaglio plate 90 (Z direction) and the extending direction of the tip 341. In the above equation (7), counterclockwise (counterclockwise) is the positive direction and counterclockwise (clockwise) is the negative direction around the contact point O between the blade body 31 and the upper surface 91 of the intaglio 90. .

  The doctor blade device 30 according to the present embodiment is in a posture inclined by a predetermined angle with respect to the upper surface 91 of the intaglio 90 so that the distal end portion 341 of the support portion 34 is perpendicular to the front surface 313 of the blade body 31. Even the surface extending in any direction is inclined so as to approach the intaglio 90 as the tip 341 moves away from the front surface 313.

Moreover, in this embodiment, the doctor blade apparatus 30 is arrange | positioned on the intaglio plate 90 so that following (8) Formula may be materialized.
0.1 mm ≦ D ≦ 5 mm (8)
However, in the above equation (8), D is a distance from the intaglio to the second end in a direction perpendicular to the intaglio.

  Then, as shown in FIG. 8B, the conductive ink M is supplied onto the intaglio 90 from a dispenser (not shown). Then, the plate table 10 is moved along the −X direction in the figure with the doctor blade device 30 in contact with the intaglio plate 90 (step S32 in FIG. 7). The conductive ink may be supplied before the doctor blade device is lowered (that is, step S31).

  The doctor blade device 30 (specifically, the tip 311 of the blade body 31) slides on the intaglio plate 90, thereby scraping off the conductive ink M applied on the upper surface 91 of the intaglio plate 90, and the concave pattern. 92 is filled with the conductive ink M. When the doctor blade device 30 is slid on the intaglio 90, as shown in FIG. 10, the conductive ink M scraped off in front of the blade body 31 (traveling direction side) is stored. In the present embodiment, the stored conductive ink M gradually increases, so that the conductive ink M rises upward, and the tip of the support portion 34 disposed in the vicinity of the tip portion 311 of the blade body 31. It contacts the part 341.

  Then, as shown in FIG. 11A, when the filling of the conductive ink M is completed for all the concave patterns 92, the plate table 10 is stopped (step S33 in FIG. 7). Note that the conductive ink M of the present embodiment is located above the conductive ink M scraped to the front (traveling direction side) of the blade body 31 even after the filling of the conductive ink M into the concave pattern 92 is completed. (Ie, the state in which the conductive ink M is in contact with the tip 341 of the support portion 34) is maintained.

  Then, as shown in FIG. 11B, the doctor blade device 30 is raised (moved in the + Z direction), and the doctor blade device 30 is retracted with respect to the intaglio 90 (step S34 in FIG. 7). When the doctor blade device 30 is raised, the conductive ink M hangs in an icicle shape from the tip of the doctor blade device 30 due to its own weight. At this time, in this embodiment, as shown in FIG. 12, the front surface 313 and the tip 341 hold the conductive ink M that hangs down.

  The icicle-shaped conductive ink (hereinafter referred to as “icicle”) has an outer shape in which the stress due to its own weight is substantially uniform in the Z direction (ie, gradually toward the tip of the conductive ink in a side sectional view). The tip position in the X direction is substantially equal to the center of the surface that holds the conductive ink (hereinafter referred to as “holding surface”).

  Conventionally, the front surface of the blade body in contact with the conductive ink is a holding surface (having a width W1 in the X direction). On the other hand, in the present embodiment, the front surface 313 and the front end portion 341 that are in contact with the conductive ink M are the holding surfaces (having a width W2 in the X direction). For this reason, in the present embodiment, in the X direction, the surface that holds the conductive ink M is expanded in a direction away from the tip portion 311 (expanded by a length W3 in the drawing). As a result, the icicle tip held by the front surface 313 and the tip portion 341 moves in a direction away from the tip portion 311 as compared with the conventional case. In other words, the icicle moves forward by a length W4 in the drawing. In FIG. 12, the conventional icicle-shaped conductive ink is represented by a broken line, and the icicle-shaped conductive ink in the present embodiment is represented by a solid line.

Further, in the doctor blade device 30 of the present embodiment, the following expression (9) is established.
C <90 ° (9)

  In this case, the component force along the extending direction of the front end portion 341 in the dead weight of the conductive ink M acts in the direction of moving the icicle away from the front surface 313 (the front end portion 311 of the blade body 31). Suppresses the flow toward 311.

  When the filling of the conductive ink M into the concave pattern 92 of the intaglio 90 is completed, the process proceeds to the receiving step S40. In the receiving step S40, first, as shown in FIG. 13A, the plate table 10 is moved along the −X direction by the moving mechanism 71 and disposed below the transfer roller 60. Then, the transfer roller 60 is moved downward from the standby position, and the transfer roller 60 is pressed against the intaglio 90 placed on the plate table 10. Then, as shown in FIG. 13B, the transfer roller 60 is rotated clockwise (clockwise), and the plate table 10 is moved along the −X direction by the moving mechanism 71. As a result, the transfer roller 60 rolls on the intaglio plate 90, and the conductive ink M filled in the concave pattern 92 of the intaglio plate 90 is received by the blanket 62 of the transfer roller 60, and a conductor layer is formed on the blanket 62. A print pattern corresponding to 120 is held. Then, as shown in FIG. 14, the transfer roller 60 is raised and retracted to the standby position, and the plate table 10 is moved along the X direction from below the transfer roller 60 to retract to the standby position. The “print pattern corresponding to the conductor layer 120” in the present embodiment corresponds to an example of the “print pattern” in the present invention.

  When the conductive ink M filled in the concave pattern 92 of the intaglio 90 is received by the transfer roller 60, the process proceeds to the transfer step S50. In the transfer step S50, first, as shown in FIG. 15A, the substrate table 20 is moved along the + X direction by the moving mechanism 72 and disposed below the transfer roller 60. Then, as shown in FIG. 15B, the transfer roller 60 is moved downward from the standby position, and the transfer roller 60 is pressed against the base material 110 placed on the base material table 20. Then, as shown in FIG. 16A, the transfer roller is rotated clockwise (clockwise), and the substrate table 20 is moved along the −X direction by the moving mechanism 72. Thereby, the transfer roller 60 rolls on the base 110, and the print pattern corresponding to the conductor layer 120 held on the blanket 62 of the transfer roller 60 is transferred to the base 21. Then, as shown in FIG. 16B, the transfer roller 60 is raised and retracted to the standby position, and the substrate table 20 is moved along the −X direction from below the transfer roller 60 to retract to the standby position. Let

  If printing process S10 is completed, it will transfer to drying process S60. In this drying step S60, the conductor layer 120 is formed on the substrate 110 by heating and curing the print pattern using the drying furnace 85 (see FIG. 1). Thereby, the wiring board 100 can be obtained.

  Note that the printing apparatus 1 of the present embodiment is used when a plurality of wiring boards 100 are continuously manufactured, and shifts to the transfer step S50 (specifically, the plate table 10 is moved to a standby position). When the standby is completed, a filling step S30 is started to manufacture the next wiring board 100 (see FIGS. 15B, 16A, and 16B). That is, after the doctor blade device 30 is moved to the standby position, the doctor blade device 30 is lowered and the tip 311 of the blade body 31 is brought into contact with the intaglio plate 90.

  In the second and subsequent filling steps, icicles hang down from the vicinity of the distal end of the doctor blade device even when the doctor blade device is waiting at the standby position. In this case, conventionally, when this doctor blade device is pressed against the intaglio, the icicles push and spread on the intaglio, and there is a possibility that a reverse side may occur.

  On the other hand, in this embodiment, the front end portion 341 of the first holder member 33 (specifically, the support portion 34) is provided in front of the front surface 313 of the blade body 31, and the front end portion 341 is provided with conductive ink. By holding M, the hanging icicles are moving forward, and the occurrence of the back is suppressed.

  The doctor blade device 30, the printing device 1, the printing method, and the manufacturing method of the wiring board 100 according to the present embodiment have the following effects.

  In the present embodiment, the tip portion 341 of the first holder member 33 (specifically, the support portion 34) is provided in front of the front surface 313 of the blade body 31 in the vicinity of the tip portion 311 of the blade body 31. Conductive ink M is held at the tip 341. As a result, the surface that holds the conductive ink M is expanded forward according to the front end portion 341, so that the hanging conductive ink M moves forward, thereby suppressing the occurrence of printing defects due to the backside. it can.

Further, in the present embodiment, since the following expression (10) is satisfied, the tip end portion 341 can be more reliably brought into contact with the conductive ink M, and therefore the occurrence of backside is further suppressed.
1 mm ≦ A ≦ 5 mm (10)
However, in the above equation (10), A is the distance from the tip 311 of the blade body 31 to the first end 342 in the extending direction of the blade body 31.

In the present embodiment, since the following expression (11) is satisfied, the tip 341 can be easily exposed to the stored conductive ink M. Therefore, the tip 341 and the stored conductive ink M Can be reliably contacted.
30 ° ≦ B ≦ 150 ° (11)
However, in the above equation (11), B is an angle formed by the front surface 313 and the virtual straight line IL.

  Further, in the present embodiment, the tip surface 341 has an inclined surface that inclines so as to approach the tip portion 311 as it moves away from the front surface 313 of the blade body 31 in the extending direction of the blade body 31. The component force along the extending direction of the front end portion 341 of the self weight acts on the icicle in a direction away from the front surface 313 (the front end portion 311 of the blade body 31). Thereby, it is suppressed that an icicle tries to flow down toward the front-end | tip part 311. FIG. As a result, the icicle hanging down from the tip of the doctor blade device 30 moves forward, and as a result, it is possible to suppress the occurrence of printing defects due to the reverse side.

In the present embodiment, since the following expression (12) is satisfied, the component force along the extending direction of the tip portion 341 of the icicle's own weight is applied to the icicle. It is reliably applied in a direction away from the part 311. Thereby, it can suppress that an icicle tries to flow down toward the front-end | tip part 311. FIG.
| C | ≦ 90 ° ・ ・ ・ (12)
However, in the above equation (12), C is an angle formed by the direction substantially perpendicular to the intaglio 90 and the extending direction of the virtual straight line IL.

Further, in the present embodiment, since the following expression (13) is established, the tip portion 341 can be more reliably brought into contact with the conductive ink M, so that the occurrence of backside is further suppressed.
0.1 mm ≦ D ≦ 5 mm (13)
However, in the above equation (13), D is the distance from the intaglio 90 to the second end 343 in the direction perpendicular to the intaglio 90.

  The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

  FIG. 17 is a cross-sectional view showing a modified example of the doctor blade device according to the embodiment of the present invention.

  For example, in the present embodiment, the tip portion 341 of the first holder member 33 is configured as an ink holding portion, but is not particularly limited thereto, and is attached to the front surface 313 of the blade body 31 as shown in FIG. Then, the plate-like member 38 may be attached to the front surface 313. In this case, since the tip portion 381 of the plate-like member 38 is positioned in the vicinity of the tip portion 311 of the blade body 31, the tip portion 381 and the conductive ink M are in contact with each other, and the same effect as in the above embodiment is obtained. Can play. The “plate member 38” in the present embodiment corresponds to an example of the “plate portion” in the present invention, and the “tip portion 381” in the present embodiment corresponds to an example of the “ink holding portion” in the present invention.

  In this embodiment, the transfer roller 60 is used, and the conductive ink M is received by the transfer roller 60 from the intaglio plate 90 (that is, the receiving step S40), and the transfer roller 60 that receives the conductive ink M is used as the base. The transfer to the material 110 (that is, the transfer step S50) is not particularly limited to the above. For example, the conductive ink may be transferred directly from the intaglio to the substrate.

  Moreover, although the printing apparatus 1 of this embodiment had one doctor blade apparatus 30, it is not limited to this in particular, You may have two doctor blade apparatuses. In this case, although not particularly illustrated, one doctor blade device is used as a doctor blade device for coating that fills the concave pattern of the intaglio plate with conductive ink, and the other doctor blade device is a conductive material remaining on the upper surface of the intaglio plate. You may use as a doctor blade apparatus for scraping off the property ink. In this case, the present invention can be applied to both the doctor blade device for coating and the doctor blade device for scraping.

DESCRIPTION OF SYMBOLS 1 ... Printing apparatus 10 ... Plate table 11 ... Holding surface 20 ... Base material table 21 ... Holding surface 30 ... Doctor blade apparatus 31 ... Blade body 311 ... Tip part 312 ... Base end 313 ... Front 314 ... Rear 32 ... Blade holder 33 ... First holder member 34 ... Supporting part
341 ... tip
342 ... first end
343 ... second end
IL ... virtual straight line 35 ... second holder member 351 ... tip portion 36 ... contact plate 37 ... fixture 38 ... plate-like member 381 ... tip portion 40 ... Doctor frame 50 ... dispenser 60 ... transfer roller 61 ... blanket cylinder 62 ... blanket 71,72 ... moving mechanism 80 ... device frame 85 ... drying furnace 90 ... intaglio 91 ... Upper surface 92 ... Concave pattern 100 ... Wiring board 110 ... Base material 120 ... Conductor layer M ... Conductive ink

Claims (11)

A doctor blade device that slides on a flat intaglio,
A blade body having a first main surface located forward in the direction of travel of the doctor blade device;
An ink holding portion provided in front of the first main surface in the vicinity of the tip of the blade body,
The ink holding part is
A first end in contact with the first main surface;
Have a, a second end portion disposed so as to be separated with the intaglio,
The ink holding portion can hold the conductive ink by contacting a portion between the first end portion and the second end portion with the conductive ink existing on the intaglio.
A doctor blade device that satisfies the following formula (1) .
1 mm ≦ A ≦ 5 mm (1)
However, in the above formula (1), A is the distance from the tip of the blade body to the first end in the extending direction of the blade body. The doctor blade device according to claim 1 ,
A doctor blade device that satisfies the following equation (2).
30 ° ≦ B ≦ 150 ° (2)
However, in the above equation (2), B is an angle formed by the first main surface and a virtual straight line passing through the first end portion and the second end portion of the ink holding portion. . The doctor blade device according to claim 1 or 2 ,
The ink holding portion extends between the first end portion and the second end portion, and at the leading end of the blade body as it moves away from the first main surface in the extending direction of the blade body. A doctor blade device having an inclined surface inclined so as to approach. The doctor blade device according to any one of claims 1 to 3 ,
A plate-like portion mounted on the first main surface of the blade body;
The plate-like portion is provided such that the tip of the plate-like portion is located near the tip of the blade body,
The tip of the plate-like portion is a doctor blade device that constitutes the ink holding unit. The doctor blade device according to any one of claims 1 to 3 ,
A blade holder for holding the blade body;
The blade holder is
A first support part for supporting the first main surface;
A second support part for supporting a second main surface opposite to the first main surface in the blade body;
The first support part protrudes more than the second support part in the extending direction of the blade body,
The tip of the first support part is a doctor blade device that constitutes the ink holding part. The doctor blade device according to any one of claims 1 to 5 ,
A base supporting the intaglio,
A supply device for supplying said conductive ink to said intaglio,
A printing apparatus comprising: a moving mechanism that relatively moves the base and the doctor blade device. A printing method for printing a conductive ink using a flat intaglio,
A first step of preparing the doctor blade device according to any one of claims 1 to 5 ;
A second step of relatively sliding the intaglio and the doctor blade device, and filling the concave pattern of the intaglio with the conductive ink by the blade body,
The printing method in which, in the second step, the conductive ink scraped by the blade body contacts at least a part of the ink holding unit. The printing method according to claim 7 , comprising:
A printing method that satisfies the following expression (3).
| C | ≦ 90 ° ・ ・ ・ (3)
However, in the above equation (3), C is an extension of an imaginary straight line passing through a direction substantially perpendicular to the intaglio and the first end portion and the second end portion of the ink holding portion. The angle formed by the current direction. The printing method according to claim 7 or 8 , comprising:
A printing method that satisfies the following expression (4).
0.1 mm ≦ D ≦ 5 mm (4)
However, in the above equation (4), D is a distance from the intaglio to the second end in a direction perpendicular to the intaglio. A printing method according to any one of claims 7 to 9 , comprising:
After the second step, a third step of receiving the conductive ink from the intaglio to the transfer body;
And a fourth step of transferring the conductive ink from the transfer body to the substrate. A printing step of forming a printing pattern on a substrate by the printing method according to claim 10;
And a drying process for drying the printed pattern.

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