JP3117444B2 - Transparent intaglio printing method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a transparent intaglio printing method.

[Problems to be solved by conventional technology and invention]

2. Description of the Related Art Conventionally, a screen printing method, a direct ejection drawing method, or the like has been adopted as a method for transferring an ink or a paste-like substance to various printed matters in a relatively thick manner.

However, both of these methods have a disadvantage that the transfer amount of the ink or the like is uneven, and as a result,
The desired printing could not be performed on the substrate.
This uneven transfer amount was caused by the influence of gauze in the former case, and caused by the difference in the ejection speed at the nozzle corners and the dripping (flow) of the transferred ink and the like in the latter case.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and a thick print layer with good reproducibility can be easily formed on a printing material without occurrence of unevenness in the amount of transition as described above. It is intended to provide an intaglio printing method.

[Means for solving the problem]

The present invention provides (1) a transparent intaglio plate in which a concave portion forming an image pattern is provided on one surface of a transparent and flexible resin plate by a photolithography method, an optical cutting method, or a mechanical cutting method. After filling the concave portions of the intaglio with viscous ink or paste-like substance, the intaglio is superimposed on the substrate so that the concave surface side comes in contact with the substrate, and the concave portion is pressed from the back of the intaglio or the substrate. A printing method using an intaglio, in which the above-mentioned filling material is transferred to the surface of an object to be transferred to form a printing layer, wherein the transparent intaglio is flat, and the object on the opposite side is visually observed through the intaglio. A transparent intaglio printing method characterized by having transparency that can be achieved.

(2) The transparent intaglio printing method according to claim 1, wherein the resin plate is a resin plate made of a natural resin, a synthetic resin, or a resin mixture thereof.

(3) The transparent intaglio printing method according to claim 1, wherein a resin plate mixed with a filler serving as a core material is used.

(4) The transparent intaglio printing method according to claim 1, wherein a transparent intaglio having a registration mark provided around the image pattern area is used.

(5) The overprinting is performed by aligning the transparent intaglio with the printing material while visually observing through the transparent intaglio or detecting the registration mark provided on the transparent intaglio by the detecting device. 4. The transparent intaglio printing method according to 4.

(6) The depth of the concave portion is changed. (A) In the photolithography method, the exposure amount or the development amount is changed. (B) In the optical cutting method, the intensity or irradiation time of irradiation light is changed. (C) Machine In the mechanical cutting method, the cutting depth of the cutting tool or the height of the male protrusion is changed. Using a transparent intaglio adjusted by either method, the amount of transfer of ink or paste-like substance is adjusted. Item 6. The transparent intaglio printing method according to any one of Items 1 to 4.

It is the gist.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The transparent intaglio printing method of the present invention uses a transparent intaglio 1 as shown in FIG. 1, and this transparent intaglio 1 is made of a transparent and flexible (flexible) resin plate 2. A plate is formed by providing a concave portion 3 serving as a base material and forming a pattern of an image formed by printing on one surface of the resin plate 2. Transparency in an intaglio means transparency at least such that an object on the opposite side can be seen through the intaglio.

The resin plate 2 is made of a natural resin, a synthetic resin, or a resin mixture thereof. As a natural resin, for example,
Gelatin, casein, natural rubber, varnish and the like,
In addition, urethane, silicone, nylon,
Tetron, polyethylene, polybutadiene, nitrocellulose, cellulose acetate, vinyl chloride, vinyl acetate, vinyl chloride / vinyl acetate copolymer, polypropylene, polyamide, polyimide and the like.

Further, the resin plate 2 is configured by mixing a filler material serving as a core material as necessary. This filler is mixed to such an extent that the transparency and flexibility of the resin plate 2 are not impaired. As the filler, glass fiber, paper fiber, general cloth fiber and the like are used.

The plate making of the transparent intaglio 1, that is, the formation of the concave portion 2 is performed by a photolithography method, an optical cutting method, or a mechanical cutting method.

Here, an example of the photolithography method will be described. As shown in FIG.
Then, ultraviolet light is exposed from above through an ultraviolet irradiation device 9 through a negative film 8 in which a portion other than the concave portion 3 forming position is a transmission hole 7, and a resin portion of the photosensitive resin plate 6 corresponding to the transmission hole 7 is exposed. Is cured, and the other resin parts are left uncured (FIG. 6A). Then, after removing the negative film 8, the uncured resin 10 is left slightly and washed out with a brush 17 or the like. (FIG. (B)), draining is performed as necessary, and then, after drying,
Exposure to ultraviolet light completely cures the uncured residual resin 10a (FIG. 3 (c)), thereby obtaining the transparent intaglio 1 in which the concave portions 3 are formed as shown in FIG.

Another example of the photolithography method will be described.
As shown in FIG. 5, a photosensitive resin 14 as a material of the resin plate 2 is injected onto the above-mentioned negative film 8 fixed by a frame 13 while being sandwiched between a glass plate 11 and a cover film 12. Then, it is pressed from above by a support plate 15 to fill a predetermined space (FIG. 6A), and then, ultraviolet light is exposed from the glass plate 11 side by an ultraviolet irradiation device 9 to expose a predetermined resin portion. Is cured (FIG. 2 (b)). Then, the support of the frame 13 and the like is released, and then weak alkaline water 16 is sprayed by means such as spraying, or is immersed in the weak alkaline water 16 to form an uncured resin. Is removed by eluting a predetermined amount (FIG. (C)), and thereafter, the uncured residual resin 10a is completely cured by exposing to ultraviolet rays again (FIG. (D)). A transparent intaglio 1 as shown is obtained.

Further, as the optical cutting method, a carbon dioxide laser,
Examples of the method include cutting by irradiation with a YAG laser or the like. Examples of mechanical cutting include a method of electronic engraving or a method of injecting a curable resin into a male mold and curing it. Applied.

Next, in the printing method of the present invention, as shown in FIG. 2, the concave portions 3 of the transparent intaglio 1 are filled with a viscous ink or a paste-like substance 4 by a known squeezing method or the like, and thereafter, the transparent intaglio and the printing material are printed. 5 is overlapped with the intaglio plate so that the side of the indentation 3 faces. According to the present invention, since the intaglio 1 is transparent at the time of this superposition, the printing substrate 5 can be seen through, and the positioning of both can be performed easily and accurately.

Examples of the ink used in the present invention include general silk screen printing inks and resist inks for printed wiring boards. Examples of the paste-like substance include a glass flux paste, a paste of one or a combination of metals such as nickel, gold, silver, platinum, solder, and copper, and a resistance paste for a thick-film IC, and the like. . The viscosity of the above inks and paste-like substances is
About 10,000 to 20,000 cp is preferable. When the viscosity is out of the above range, problems such as a flow of the transferred ink (drip) and a transfer failure where the ink is clogged on the resin plate occur.

Next, in the present invention, after the transparent intaglio 1 and the printing material 5 are polymerized, pressure is applied from the opposite side of the intaglio or the printing material using a pressure roller or the like, and then both are separated, as shown in FIG. As described above, the filling (that is, the ink or the paste-like substance 4) in the concave portion 3 of the intaglio 1 is transferred to the printing material 5 to perform printing.

In the present invention, a known registration mark is provided around the image pattern area of the transparent intaglio 1 (that is, the area where the image concave portion 3 to be printed is provided) as necessary. By providing this mark, the position of the intaglio 1 can be controlled by detecting the mark with a detecting device or the like. As a result,
The intaglio and the printing medium can be automatically and accurately superimposed.

According to the present invention, one-step printing can be performed according to the above-described procedure. However, in the case where overprinting is repeatedly performed, the alignment between the transparent intaglio 1 and the printing material 5 is performed through the intaglio 1. This is carried out while visually observing the printing material, or while using an intaglio 1 provided with a registration mark and detecting the mark by a detection device.

Further, in the present invention, the depth of the concave portion 3 of the intaglio 1 is changed by changing the exposure amount or the developing amount in the photolithography method, and by changing the intensity of the light to be irradiated or the irradiation time in the optical cutting method, In the mechanical cutting method, the transfer amount of the ink or the paste-like substance 4 to the printing material 5 can be adjusted by changing the cutting depth of the cutting tool or the height of the male convex portion.

Examples of the printing object 5 to which the printing method of the present invention can be applied include a thick film IC, a printed wiring board, a glass panel of a display device, a glass panel of a measuring instrument, a decorative plate, and the like.

Next, the present invention will be described in more detail with reference to specific examples.

Example 1 Using a commercially available photosensitive resin plate (manufactured by Tokyo Ohka: Milacron, Eraslon-II or Rigilon), a concave intaglio pattern was provided by photolithography shown in FIG. 4 to make a transparent intaglio plate. This intaglio had excellent transparency and flexibility.

Next, a silver paste having a viscosity of 25,000 cp (manufactured by DuPont: No. 7713) was applied to the transparent intaglio plate using a urethane squeegee (hardness: 70).
After filling using ゜), the intaglio plate is placed on the glass plate of the printing material, and the intaglio plate is peeled off by pressing the back surface of the intaglio plate with a pressure roll, whereby a silver paste having a film thickness of 50 μm is formed. Was transferred. At this time, the position of the transparent intaglio was adjusted while seeing through the registration marks on the glass plate, and the transparent intaglio could be easily superimposed on the correct position.

After the printing, the glass plate was baked at 580 ° C. for 30 minutes and peeled from the glass plate, whereby a silver terminal was obtained.

Example 2 Using a commercially available photosensitive resin (manufactured by Tokyo Ohka: Tevista or Orcaster LQ), a flexible transparent intaglio was made by the procedure shown in FIG.

Next, a frit paste 501 (manufactured by Okuno Pharmaceutical Co., Ltd.) having a viscosity of 100,000 cp was coated on the transparent intaglio with a urethane squeegee (hardness 90).
C.), printing was performed on a glass plate in the same manner as in Example 1, and the paste was transferred to a dielectric pattern.

At this time, the two were able to be accurately overlapped while seeing through the glass plate from the intaglio plate, so that the dielectric pattern could be printed at a predetermined position on the glass plate with high dimensional accuracy. In addition, since the intaglio plate was soft, the paste filled in the concave portions could be transferred at a high rate, and it was confirmed that printing with a film thickness close to the designed value was possible.

〔The invention's effect〕

As described above, the intaglio printing method of the present invention uses a transparent intaglio having transparency and flexibility, so that the intaglio and the object to be printed can be accurately determined by seeing through the intaglio and visually observing the object to be printed. It is possible to superimpose, in particular, the ink or the paste-like substance filled in the intaglio concave portion can be easily and efficiently transferred to the printing material by the above flexibility, and as a result, the unevenness of the transfer amount of the ink or the like is reduced. An image with good reproducibility can be printed. In particular, when performing overprinting, it is possible to perform printing with excellent dimensional accuracy, and if a register mark is provided on the intaglio, highly accurate printing can be performed more accurately and efficiently.

Further, the transfer amount of the ink can be adjusted by the depth of the concave portion of the resin intaglio, and there is an effect that a required amount of ink can be transferred by one transfer operation.

[Brief description of the drawings]

1 to 3 are cross-sectional views showing examples of each step of the printing method of the present invention, and FIGS. 4 and 5 are explanatory views showing the steps of making a transparent intaglio plate by photolithography. DESCRIPTION OF SYMBOLS 1 ... Transparent intaglio, 2 ... Resin plate 3 ... Recess 4 ... Ink or paste-like substance 5 ... Printed material

Claims (6)

(57) [Claims] 1. A transparent intaglio plate formed by forming a concave portion forming an image pattern on one surface of a transparent and flexible resin plate by photolithography, optical cutting or mechanical cutting. Then, after the viscous ink or paste-like substance is filled in the concave portions of the intaglio, the intaglio is superimposed on the substrate so that the concave surface side comes in contact with the substrate, and the intaglio or the back surface of the substrate is pressed into the concave portion. A printing method using an intaglio, in which a certain filling material is transferred to the surface of an object to be transferred to form a printing layer, wherein the transparent intaglio is plate-shaped, and a transparent object through which the opposite object can be visually observed. A transparent intaglio printing method characterized by having a characteristic. 2. The method according to claim 1, wherein the resin plate is a resin plate made of a natural resin, a synthetic resin, or a resin mixture thereof. 3. The transparent intaglio printing method according to claim 1, wherein a resin plate mixed with a filler serving as a core material is used. 4. The transparent intaglio printing method according to claim 1, wherein a transparent intaglio having a registration mark provided around the image pattern area is used. 5. The method according to claim 1, wherein the transparent intaglio and the printing medium are aligned with each other and visually inspected through the transparent intaglio or a registration mark provided on the transparent intaglio is detected by a detecting device. 5. The transparent intaglio printing method according to 1 or 4. 6. The depth of the concave portion is changed by: (a) changing the exposure amount or development amount in the photolithography method; (b) changing the intensity of irradiation light or irradiation time in the optical cutting method; ) In the mechanical cutting method, the depth of the cutting tool or the height of the male projection is changed. Using a transparent intaglio adjusted by either method, the amount of transfer of ink or paste-like substance is adjusted. The intaglio printing method according to any one of claims 1 to 4.