JP2006327122A - Screen printing plate and method for manufacturing screen printing plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screen printing plate capable of preventing a part of a coating substance from oozing outward from a printing pattern. <P>SOLUTION: An opening 3 of the screen printing plate 1 on which a photosensitive emulsion layer 4 is formed is constituted of an introducing opening 3a and a printing opening 3b connected with this introducing opening 3a, and the printing opening 3b is constituted by being protruded outward in a plan view from the introducing opening 3a, and having a shallower depth. It is possible thereby to prevent a part of the coating substance from oozing from a gap between the opening edge of the printing opening 3b and the printing face of a printed matter, and to prevent a part of the coating substance from oozing outward from the printing pattern. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a screen printing plate used for screen printing and a method for producing the same.

  As is well known, screen printing is performed by placing an object to be printed at a predetermined position on a printing table, supplying a paste-like or ink-like application to the screen printing plate, and sliding the surface of the screen printing plate using a squeegee. Thus, desired printing is performed on the printing surface of the substrate.

In conventional screen printing plates, for example, a screen formed by weaving vertical lines and horizontal lines made of synthetic fibers such as polyester, nylon, and tetron, and fine lines of stainless steel alternately, is attached to a screen frame and fixed to this screen. A photosensitive emulsion is applied, dried and adhered, and a photosensitive mask is placed on the surface of the screen on which the photosensitive emulsion is adhered, which is in contact with the printed material. Is removed to form a screen pattern, and the remaining photosensitive emulsion is cured to form a resist film.
Then, in such a screen printing plate, as described above, a paste-like or ink-like coating material is supplied, and the coating material is extruded from the voids of the screen mesh of the screen pattern with a squeegee, and the substrate is printed. A desired pattern is printed on the printing surface (for example, Patent Document 1 and Patent Document 2).
JP 2003-300302 A Japanese Patent Laid-Open No. 2002-362056

However, in the screen printing method using the conventional screen printing plate as described above, for example, as shown in FIG. 9, a part of the coating material such as ink is exposed to the outside from the printing pattern 20 printed on the printing surface of the printed material. The phenomenon of bleeding (exuding portion B1) may occur, and the printing accuracy is lowered.
That is, as shown in FIG. 10, the paste 5 or the ink-like coating material B is printed on the printed material 5 from the apertures 21 a formed on the screen printing plate 21 by sliding the surface of the screen printing plate using the squeegee 15. When extruding to the surface, a part B1 of the coating B leaks out from the gap between the lower edge of the aperture 21a and the printing surface, and as a result, from the printing pattern 20 printed on the printing surface. There was a case in which a part B1 of the coated material B oozes out to the outside. In FIG. 10, reference numeral 2 denotes a screen, and reference numeral 4 denotes a photosensitive emulsion layer formed on the screen.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the manufacturing method of the screen printing plate which can prevent that a part of coating material oozes out from a printing pattern outside.

In order to solve the above problems, the invention according to claim 1 is a screen printing plate in which a photosensitive emulsion layer having an aperture is formed.
The opening portion is connected to the introduction opening portion that opens to the side on which the printing material to be introduced is introduced, and opens to the side that comes into contact with the substrate to be printed, and corresponds to the printing shape. It consists of a print opening with a shape,
The printing opening portion protrudes outward from the introduction opening portion in plan view, and has a shallow depth.

  Here, the planar shape and area of the printing aperture are the same as the printed pattern to be printed.

  According to the first aspect of the present invention, the paste or ink-like coating material is supplied onto the screen printing plate, and the coating material is introduced and opened by sliding the surface of the screen printing plate using a squeegee. Introduce into the hole. Then, the coating material flows from the introduction opening portion into the printing opening portion, and enters the outside in the plan view through the printing opening portion, and prints a desired pattern on the printing surface of the printing material. The pressure (printing pressure) that causes the coating material to flow into the introduction aperture by the squeegee is uniformly transmitted in the introduction aperture, but the force for allowing the coating to enter the outside in a plan view in the printing aperture. Since the printing pressure is attenuated by the resistance, it is possible to prevent a part of the coated material from leaking from the gap between the opening edge of the printing aperture and the printed surface of the printed material. Therefore, it is possible to prevent a part of the coating from bleeding out from the print pattern printed on the printing surface.

  The invention according to claim 2 is that in the screen printing plate according to claim 1, the protruding length of the printing hole portion protruding outward from the introduction hole portion in a plan view is 5 to 125 μm. Features.

  Here, the protrusion length is set to 5 to 125 μm. If the protrusion length is less than 5 μm, the attenuation amount of the printing pressure is too small, and the opening edge of the printing aperture and the printing surface of the printed matter When a part of the coating material leaks slightly from the gap between the printing pattern and part of the coating material oozes out to the outside, and the overhang length exceeds 125 μm, the coating material opens to the opening of the printing hole. This is because the edge may not reach the edge, so that the outer peripheral edge of the printed pattern is blurred.

  According to the second aspect of the present invention, since the protruding length of the printing opening portion protruding outward from the introduction opening portion in a plan view is set to 5 to 125 μm, the printing pattern printed on the printing surface From this, it is possible to prevent a part of the applied material from oozing out to the outside or to blur the outer peripheral edge of the printed pattern, thereby further improving the printing accuracy.

  The invention according to claim 3 is the screen printing plate according to claim 1 or 2, wherein the photosensitive emulsion layer has a two-layer structure in which the second photosensitive emulsion layer is laminated on the first photosensitive emulsion layer. In addition, an introduction opening is formed in the first photosensitive emulsion layer, and a printing opening is formed in the second photosensitive emulsion layer.

  According to a third aspect of the present invention, the photosensitive emulsion layer has a two-layer structure, the introduction opening is formed in the first photosensitive emulsion layer, and the printing opening is formed in the second photosensitive emulsion layer. Therefore, the introduction opening portion and the printing opening portion can be easily and accurately formed by using the photoengraving method.

  According to a fourth aspect of the present invention, in the screen printing plate according to the third aspect, different dyes are contained in the emulsion forming the first photosensitive emulsion layer and the emulsion forming the second photosensitive emulsion layer. It is characterized by.

According to the invention described in claim 4, the surface of the first photosensitive emulsion layer is a squeegee surface, and the surface of the second photosensitive emulsion layer is an abutting surface in contact with the printed matter. Since the emulsion layer and the second photosensitive emulsion layer exhibit different colors, the squeegee surface and the contact surface can be easily distinguished during screen printing.
In addition, since the first photosensitive emulsion layer and the second photosensitive emulsion layer exhibit different colors, the printing apertures formed in the second photosensitive emulsion layer are formed in the first photosensitive emulsion layer. Inspection and measurement of the protruding length protruding outward from the introduction opening portion in plan view can be easily and reliably performed.

Invention of Claim 5 is a manufacturing method of the screen printing plate which manufactures the screen printing plate of Claim 3 or 4, Comprising:
After the photosensitive emulsion is coated on the screen to form the first photosensitive emulsion layer, the first photosensitive emulsion layer is covered with an introduction hole forming mask, and exposed and developed to perform introduction and opening. Forming a hole,
Next, after a photosensitive emulsion is coated on the first photosensitive emulsion layer to form a second photosensitive emulsion layer, the second photosensitive emulsion layer is covered with a mask for forming print apertures, exposed, A printing hole is formed by performing a development process.

  According to the fifth aspect of the present invention, the introduction aperture is formed by covering the first photosensitive emulsion layer with the introduction aperture formation mask and performing exposure and development processing, thereby providing the second photosensitive layer. Since the printing hole is formed by covering the emulsion layer with a mask for forming the printing hole and exposing and developing, that is, since the photoengraving method is used, the introduction hole and the printing opening are formed. The hole can be easily and precisely formed.

Invention of Claim 6 is a manufacturing method of the screen printing plate which manufactures the screen printing plate of Claim 1 or 2, Comprising:
After the photosensitive emulsion is coated on the screen to form a photosensitive emulsion layer, this photosensitive emulsion layer is covered with either the introduction aperture formation mask or the printing aperture formation mask. Then, by removing a part of the photosensitive emulsion layer by irradiating with a laser beam, one of the introduction opening portion and the printing opening portion is formed in the photosensitive emulsion layer. ,
Next, by removing the one mask and covering the photosensitive emulsion layer with the other mask and irradiating a laser beam to remove a part of the photosensitive emulsion layer, The other opening is formed.

Here, the laser light does not cause damage to screens such as excimer laser light or YAG third harmonic laser light (for example, a SUS mesh or a metal rod formed by electroforming) or is minor as damage. Using a laser beam, only the photosensitive emulsion layer is removed and processed.
Further, the processing depth when a part of the photosensitive emulsion layer is removed by laser light is adjusted by adjusting the irradiation energy of the laser light.

  According to the invention described in claim 6, the photosensitive emulsion layer is covered with a mask for forming an opening for opening or a mask for forming a printing aperture, and a part of the photosensitive emulsion layer is irradiated with laser light. By removing, the introduction opening portion and the printing opening portion are formed in the photosensitive emulsion layer, so that the introduction opening portion and the printing opening portion can be easily and precisely formed.

Invention of Claim 7 is a manufacturing method of the screen printing plate which manufactures the screen printing plate of Claim 1 or 2, Comprising:
After the photosensitive emulsion is coated on the screen to form a photosensitive emulsion layer, both the surface of the photosensitive emulsion layer are covered with an introduction aperture portion forming mask and a printing aperture portion forming mask, respectively. The exposure depth is adjusted by irradiating and exposing, and development processing is performed to form an introduction aperture portion and a print aperture portion in the photosensitive emulsion layer.

Here, the ultraviolet rays may be irradiated to the introduction aperture portion forming mask and the print aperture portion forming mask at the same time or separately.
When exposure is performed by adjusting the exposure depth with ultraviolet rays, the exposure time is adjusted by adjusting the ultraviolet irradiation time.

  According to the seventh aspect of the present invention, the exposure depth is obtained by irradiating the surface of both sides of the photosensitive emulsion layer with the introduction hole forming mask and the printing hole forming mask and irradiating with ultraviolet rays. By adjusting and exposing and developing, the introduction hole and the printing hole are formed in the photosensitive emulsion layer, so the introduction hole and the printing hole are easily and precisely formed. it can.

According to the present invention, the printing aperture that opens to the side that contacts the substrate to be printed protrudes outward in plan view from the introduction aperture that opens to the side where the printing application is introduced, In addition, since the depth is shallow, the pressure (printing pressure) that causes the coating material to flow into the introduction aperture portion by the squeegee is uniformly transmitted in the introduction aperture portion, but the coating material in the printing aperture portion. Force is required to enter the outside in a plan view, and the printing pressure is attenuated by the resistance, so that a part of the applied material leaks from the gap between the opening edge of the printing aperture and the printed surface of the printed material. Can be prevented. Therefore, it is possible to prevent a part of the coating from bleeding out from the print pattern printed on the printing surface.
In addition, the introduction opening portion and the printing opening portion can be easily and precisely formed in the first photosensitive emulsion layer and the second photosensitive emulsion layer by photolithography.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
FIG. 1 is a sectional view showing a screen printing plate according to the present invention. The screen printing plate 1 is formed by forming a photosensitive emulsion layer 4 having an aperture 3 on a screen (紗) 2.
The screen 2 is formed by weaving vertical lines and horizontal lines made of synthetic fibers such as polyester, nylon, and tetron or the like alternately and horizontal lines, and is fixed to a screen frame (not shown). In FIG. 1, reference numeral 5 denotes a substrate. Further, the vertical line and the horizontal line constituting the screen 2 have a diameter of about 18 μm, for example, and the thickness (the thickness of the screen) formed by alternately weaving the vertical line and the horizontal line is about 27 μm. Further, the screen 2 may be one produced by electroforming in addition to one formed by weaving vertical lines and horizontal lines alternately to form a mesh. The mesh shape of the screen 2 is preferably a lattice shape in the case of a SUS mesh, and is preferably a lattice shape or a honeycomb shape in the case of an electroformed product.

The photosensitive emulsion layer 4 is a layer formed by, for example, coating a diazo photosensitive emulsion on the screen 2, drying, and then exposing and developing. The photosensitive emulsion layer 4 is formed on the first photosensitive emulsion layer 6. It has a two-layer structure in which two photosensitive emulsion layers 7 are laminated.
As shown in FIG. 2, the first photosensitive emulsion layer 6 has a structure in which the photosensitive emulsion is entangled and adhered to a screen 2 formed by weaving vertical lines 2a and horizontal lines 2b alternately. The thickness of the first photosensitive emulsion layer 6 is about 27 to 32 μm. The first photosensitive emulsion layer 6 has a thickness obtained by adding the emulsion thickness (0 to 5 μm) to the thickness of the screen 2 (２ thickness).
The thickness of the second photosensitive emulsion layer 7 is about 2 to 6 μm. Further, as shown in FIG. 1, the first photosensitive emulsion layer 6 has an introduction opening 3a, and the second photosensitive emulsion layer 7 has a printing opening 3b.

The introduction opening 3a is open on the side (the upper surface side in FIG. 1) where the ink-like or paste-like applied material for printing is introduced. The printing aperture 3b is connected to the introduction aperture 3a and opens on the side that contacts the substrate 5 (the lower surface in FIG. 1). The print aperture 3b is formed in the same shape and size as the print shape (print pattern) in plan view.
Further, the printing hole portion 3b protrudes outside the introduction hole portion 3a and has a shallow depth. The depth of the introduction opening 3a is substantially equal to the thickness of the first photosensitive emulsion layer 6, and the depth of the printing opening 3b is equal to the thickness of the second photosensitive emulsion layer 7. Therefore, the depth of the introduction aperture 3a is about 27 to 32 μm, and the depth of the print aperture 3b is about 2 to 6 μm.

Further, the protruding length L of the printing opening 3b protruding outward from the introduction opening 3a in plan view is set to 5 to 125 μm. As described above, the protrusion length was set to 5 to 125 μm. If the protrusion length was less than 5 μm, the coating material was slightly formed from the gap between the opening edge of the printed opening 3 b and the printed surface of the printed material 5. If the leakage occurs and a part of the coated material oozes out slightly from the printed pattern and the protruding length exceeds 125 μm, the coated material may not reach the opening edge of the printing aperture 3a. This is because blurring or the like occurs on the outer peripheral edge of the pattern.
As described above, the printing aperture 3b protrudes outward from the introduction aperture 3a in plan view, so that the circumferential surface of the printing aperture 3b, the lower surface of the first photosensitive emulsion layer 6, and the printed matter 5 A gap S is formed between the printing surface and the printing surface.
The emulsion forming the first photosensitive emulsion layer 6 and the emulsion forming the second photosensitive emulsion layer 7 contain different dyes.

Next, a method for manufacturing the screen printing plate 1 having the above configuration will be described with reference to FIG.
First, as shown in FIG. 3A, a photosensitive emulsion is applied to the printing surface of the screen 2 fixed to the screen frame 10 formed of a metal such as aluminum and dried, and then dried. 1 Light-sensitive emulsion layer 6 is formed. The photosensitive emulsion contains a dye having an appropriate color.

Next, as shown in FIG. 3B, the first photosensitive emulsion layer 6 is covered with an introduction hole forming mask 11 and exposed. A print pattern portion 11 a having a shape substantially corresponding to the print pattern to be printed is formed on the introduction aperture portion forming mask 11. The print pattern portion 11a has non-translucency, and the portions other than the print pattern portion 11a have translucency.
Therefore, by exposing the first photosensitive emulsion layer 6 by irradiating light from the introduction aperture portion forming mask 11, the photosensitive emulsion located below the print pattern portion 11a is not exposed, and the print pattern portion is exposed. Sites other than 11a are exposed and cured.
Thereafter, the introduction aperture portion forming mask 11 is peeled off and developed, whereby the photosensitive emulsion located below the print pattern portion 11a is removed as shown in FIG. The introduction hole 3 a is formed in the photosensitive emulsion layer 6. The dimension K1 of the introduction aperture 3a is slightly smaller than the dimension K, where K is the dimension of the print pattern to be printed. This can be realized by setting the dimension of the print pattern portion 11a to K1.

Next, as shown in FIG. 3D, a photosensitive emulsion is coated on the first photosensitive emulsion layer 6 and dried to form the second photosensitive emulsion layer 7. The photosensitive emulsion contains a dye having an appropriate color different from that of the first photosensitive emulsion layer 6. Further, by coating a photosensitive emulsion on the first photosensitive emulsion layer 6, the emulsion is filled in the introduction hole portion 3a.
Next, the second photosensitive emulsion layer 7 is covered with a print aperture forming mask 12 and exposed. A print pattern portion 12 a having a shape corresponding to the print pattern to be printed is formed on the print hole forming mask 12. The print pattern portion 12a has non-translucency, and the portions other than the print pattern portion 12a have translucency.
Therefore, by exposing the second photosensitive emulsion layer 7 by irradiating light from above the printing aperture portion forming mask 12, the photosensitive emulsion located below the printing pattern portion 12a is not exposed, and the printing pattern portion is exposed. Sites other than 12a are exposed and cured.
Thereafter, the printing aperture portion forming mask 12 is peeled off and developed, whereby the photosensitive emulsion located below the printing pattern portion 12a is removed as shown in FIG. The printing hole 3b is formed in the photosensitive emulsion layer 7. The dimension K2 of the print opening 3b is equal to the dimension K, where K is the dimension of the print pattern to be printed. That is, it is slightly larger than the dimension K1. This can be realized by setting the size of the print pattern portion 12a to K2.

In the screen printing plate 1 thus produced, the surface of the first photosensitive emulsion layer 6 in which the introduction aperture 3a is formed (the lower surface in FIG. 3 (e) and the upper surface in FIG. 4) is a squeegee surface. The surface (the upper surface in FIG. 3 (e) and the lower surface in FIG. 4) of the second photosensitive emulsion layer 7 in which the printing apertures 3b are formed serves as a contact surface that contacts the printed matter.
Then, as shown in FIG. 4, a paste-like or ink-like coating material B is supplied onto the squeegee surface of the screen printing plate 1, and the coating material B is squeezed using the squeegee 15 to slide the coating material B. It introduces into the introduction hole 3a.
Then, the coated material B flows from the introduction opening portion 3a into the printing opening portion 3b, and enters the outer gap S in a plan view through the printing opening portion 3b, and forms a desired pattern on the printing surface of the substrate 5 to be printed. Print.
The pressure (printing pressure) that causes the coating material to flow into the introduction opening portion 3a by the squeegee is uniformly transmitted in the introduction opening portion 3a, but in the printing opening portion 3b, the outer clearance S in the plan view is shown. Since a force is required to enter and the printing pressure is attenuated by the resistance, a part of the coating B is prevented from leaking from the gap between the opening edge of the printing aperture 3b and the printing surface of the printing. it can. Therefore, it is possible to prevent a part of the coating B from bleeding out from the print pattern printed on the printing surface.

Moreover, since the protrusion length which the printing aperture part 3b protrudes outside in the planar view from the introduction aperture part 3a was set to 5 to 125 μm, a part of the coated material was formed from the print pattern printed on the printing surface. It is possible to prevent oozing out and fading on the outer peripheral edge of the print pattern, thereby further improving the printing accuracy.
Further, the first photosensitive emulsion layer 6 is covered with the introduction aperture forming mask 11 and exposed and developed to form the introduction aperture 3a, and the second photosensitive emulsion layer 7 is printed and opened. Since the printing opening 3b is formed by covering the hole forming mask 12 and performing exposure and development processing, that is, because the photoengraving method is used, the introduction opening 3a and the printing opening 3b can be formed easily and precisely.
In addition, the surface of the first photosensitive emulsion layer 6 becomes a squeegee surface, and the surface of the second photosensitive emulsion layer 7 becomes an abutting surface that comes into contact with the printed matter 5. Since the two photosensitive emulsion layers 7 exhibit different colors, the squeegee surface and the contact surface can be easily distinguished during screen printing.
Further, since the first photosensitive emulsion layer 6 and the second photosensitive emulsion layer 7 exhibit different colors, the printing apertures 3b formed in the second photosensitive emulsion layer 7 serve as the first photosensitive emulsion layer. Thus, it is possible to easily and reliably inspect and measure the length of the protrusion that protrudes outward from the introduction opening portion 3a formed in FIG.

  In the present embodiment, the photosensitive emulsion layer 4 has a two-layer structure including a first photosensitive emulsion layer 6 and a second photosensitive emulsion layer 7, and an introduction opening portion is formed in the first photosensitive emulsion layer 6. 3a is formed, and the printing aperture 3b is formed in the second photosensitive emulsion layer 7. However, the present invention is not limited to this, and the introduction aperture and the printing aperture are formed in the photosensitive emulsion layer having a single layer structure. A part may be formed.

(Second Embodiment)
FIG. 5 is a sectional view showing a screen printing plate according to the present invention. The screen printing plate 31 is obtained by forming a photosensitive emulsion layer 34 having apertures 33 on a grid-like or honeycomb-like screen (rib) 32 formed by electroforming.
The photosensitive emulsion layer 34 is a layer formed by, for example, coating a diazo photosensitive emulsion on the screen 32, drying it, and then exposing and developing, and has a single-layer structure.
The opening portion 33 has an introduction opening portion 33a that opens to the side on which the printing material to be introduced is introduced, and is connected to the introduction opening portion 33a and opens to the side that comes into contact with the substrate to be printed. The printing opening portion 33b has a shape corresponding to the above. The depth of the introduction opening 33a is about 27 to 32 μm, and the depth of the printing opening 33b is about 2 to 6 μm.
Further, the printing hole 33b protrudes outward from the introduction hole 33a and has a shallow depth. The protruding length L that the printing opening portion 33b protrudes outward from the introduction opening portion 33a in plan view is set to 5 to 125 μm. The reason is the same as in the first embodiment.

Next, a method for manufacturing the screen printing plate 31 having the above configuration will be described with reference to FIG.
First, as shown in FIG. 6A, a photosensitive emulsion layer 34 is formed by coating a photosensitive emulsion on a screen 32, drying it, and further exposing it.
Next, as shown in FIG. 6B, a metal introduction aperture forming mask 35 is placed on the printing surface of the photosensitive emulsion layer 34. The introduction hole forming mask 35 has a plurality of windows 35a through which laser light is transmitted. The planar size and shape of the window portion 35a are equal to the planar size and shape of the introduction hole portion 33a.
The photosensitive emulsion layer 34 is irradiated with laser light such as excimer laser light or YAG third harmonic laser light from the introduction hole forming mask 35. Then, a part of the photosensitive emulsion layer 34 is removed by the laser beam transmitted through the window 35a of the introduction aperture forming mask 35, and introduced into the photosensitive emulsion layer 34 as shown in FIG. Opening 33a is formed. The processing depth of the introduction hole 33a by the laser beam is performed by adjusting the irradiation energy of the laser beam.

Next, the introduction opening portion forming mask 35 is removed, and the printing opening portion forming mask 36 is placed on the photosensitive emulsion layer 34 as shown in FIG. The printing aperture forming mask 36 is formed with a plurality of windows 36a through which laser light is transmitted. The planar size and shape of the window 36a are equal to the planar size and shape of the printing aperture 33b.
When the printing hole forming mask 36 is placed on the photosensitive emulsion layer 34, the window 36 a of the printing hole forming mask 36 faces the introduction opening 33 a formed in the photosensitive emulsion layer 34. Align so that
Then, the photosensitive emulsion layer 34 is irradiated with laser light such as excimer laser light or YAG third harmonic laser light from the mask 36 for forming the printed aperture. Then, a part of the photosensitive emulsion layer 34 is removed by the laser light transmitted through the window 36 a of the printing hole forming mask 36, and the printing hole 33 b is formed in the photosensitive emulsion layer 34. In addition, the processing depth of the printing opening part 33b by a laser beam is performed by adjusting the irradiation energy of a laser beam.

In this manner, the photosensitive emulsion layer 34 is covered with the introduction aperture portion forming mask 35 and the print aperture portion forming mask 36, and a part of the photosensitive emulsion layer 34 is removed by irradiation with laser light. As a result, the introduction opening 33a and the printing opening 33b can be easily and precisely formed in the photosensitive emulsion layer 34.
In the above example, the photosensitive emulsion layer 34 is covered with the introduction opening portion forming mask 35 and irradiated with laser light, and then the introduction opening portion formation mask 35 is removed to form the printing opening portion. The mask 36 is placed on the photosensitive emulsion layer 34 and irradiated with the laser beam. On the contrary, the photosensitive emulsion layer 34 is covered with the mask 36 for forming the print aperture and irradiated with the laser beam. After that, the print aperture forming mask 36 may be removed, and the introduction aperture forming mask 35 may be placed on the photosensitive emulsion layer 34 and irradiated with laser light. In particular, when using a YAG third harmonic laser beam, in order to reduce the influence on the screen (紗), it is desirable to first process the printing aperture and then process the introduction aperture. .

In addition, when the introduction opening 33a and the printing opening 33b as described above are formed in the screen printing plate 31, the following may be performed.
That is, first, as shown in FIG. 7 (a), a photosensitive emulsion is coated on a screen 32 to form a photosensitive emulsion layer 34, and then an introduction opening is formed on both surfaces of the photosensitive emulsion layer 34. A mask 37 for printing and a mask 38 for forming a printing hole are covered. The introduction opening portion forming mask 37 is formed with a plurality of window portions 37a that transmit ultraviolet rays and a plurality of mask portions 37b that do not transmit ultraviolet rays. The planar size and shape of the mask portion 37b are equal to the planar size and shape of the introduction opening portion 33a. Further, the printing hole forming mask 38 is formed with a plurality of window portions 38a that transmit ultraviolet rays and a plurality of mask portions 38b that do not transmit ultraviolet rays. The planar size and shape of the mask portion 38b are equal to the planar size and shape of the printing hole portion 33b.
When the introduction opening portion forming mask 37 and the printing opening portion forming mask 38 are covered on both surfaces of the photosensitive emulsion layer 34, the window portion 37a and the mask portion 37b formed thereon, and the window portion 38a are formed. The alignment is performed so that the mask portion 38b faces each other.

Next, the photosensitive emulsion layer 34 is irradiated with ultraviolet rays from the introduction opening portion forming mask 37 and the printing opening portion forming mask 38. Then, the photosensitive emulsion located under the window portions 37a and 38a is exposed by the ultraviolet rays transmitted through the window portion 37a of the introduction hole portion forming mask 37 and the window portion 38a of the printing hole portion forming mask 38. In this case, the exposure depth by the ultraviolet rays is adjusted by adjusting the irradiation time of the ultraviolet rays. Thus, the photosensitive emulsion located below the window portion 37a is exposed from one surface to a depth d1, and the photosensitive emulsion located below the window portion 38a is exposed from the other surface to a depth d2. d1 is about 27 to 32 μm, and d2 is about 2 to 6 μm.
Thereafter, by performing development processing, as shown in FIG. 7 (b), an introduction opening 33a and a printing opening 33b are formed in the photosensitive emulsion layer 34.
In this way, the introduction opening 33a and the printing opening 33b can be easily and precisely formed in the photosensitive emulsion layer 34. In addition, since the exposure is simultaneously performed from both the introduction opening portion forming mask 37 side and the printing opening portion forming mask 38 side, the manufacturing time can be shortened. Further, the exposure may be performed separately from both the introduction hole forming mask 37 side and the printing hole forming mask 38 side.

  In the second embodiment, the screen printing plate 31 is manufactured by using a grid-like or honeycomb-like screen (rib) 32 formed by electroforming. A screen printing plate may be produced in the same manner as described above using a screen formed by alternately weaving lines and horizontal lines to form a mesh.

  Further, in the screen printing plate of the present invention, in addition to the shapes of the introduction opening portions 3a and 33a and the printing opening portions 3b and 33b of the screen printing plates 1 and 31 shown in the first and second embodiments. 8A to 8T may have shapes such as an introduction opening portion a and a printing opening portion b as shown in FIGS.

An example of the screen printing plate concerning this invention is shown, and is sectional drawing of this screen printing plate. FIG. 2 is a cross-sectional view of the first photosensitive emulsion layer. It is process drawing which shows an example of the manufacturing method of the screen printing plate which concerns on this invention. It is sectional drawing which shows the state which is performing screen printing using the screen printing plate which concerns on this invention. The other example of the screen printing plate which concerns on this invention is shown, and is sectional drawing of this screen printing plate. It is process drawing which shows the other example of the manufacturing method of the screen printing plate which concerns on this invention. It is process drawing which shows the other example of the manufacturing method of the screen printing plate which concerns on this invention. It is a schematic sectional drawing which shows the variation of the introduction opening part and printing opening part of the screen printing plate which concern on this invention. It is a top view which shows the printing pattern at the time of screen-printing using the conventional screen printing plate. It is sectional drawing which shows the state which is performing screen printing using the conventional screen printing plate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Screen printing plate 2 Screen 3,33 Opening part 3a, 33a, a Introduction opening part 3b, 33b, b Printing opening part 4,34 Photosensitive emulsion layer 5 To-be-printed material 6 1st photosensitive emulsion layer 7 2nd Photosensitive emulsion layer 11, 35, 37 Introduced aperture forming mask 12, 36, 38 Print aperture forming mask

Claims (7)

In a screen printing plate in which a photosensitive emulsion layer having an aperture is formed on a screen,
The opening portion is connected to the introduction opening portion that opens to the side on which the printing material to be introduced is introduced, and opens to the side that comes into contact with the substrate to be printed, and corresponds to the printing shape. It consists of a print opening with a shape,
The screen printing plate according to claim 1, wherein the printing aperture portion protrudes outward from the introduction aperture portion in a plan view and has a shallow depth.   2. The screen printing plate according to claim 1, wherein a protruding length of the printing opening portion protruding outward from the introduction opening portion in a plan view is 5 to 125 μm. The photosensitive emulsion layer has a two-layer structure in which the second photosensitive emulsion layer is laminated on the first photosensitive emulsion layer,
The screen printing plate according to claim 1 or 2, wherein an introduction aperture is formed in the first photosensitive emulsion layer, and a printing aperture is formed in the second photosensitive emulsion layer.   4. The screen printing plate according to claim 3, wherein the emulsion forming the first photosensitive emulsion layer and the emulsion forming the second photosensitive emulsion layer contain different dyes. A method for producing a screen printing plate for producing a screen printing plate according to claim 3 or 4,
After the photosensitive emulsion is coated on the screen to form the first photosensitive emulsion layer, the first photosensitive emulsion layer is covered with an introduction hole forming mask, and exposed and developed to perform introduction and opening. Forming a hole,
Next, after a photosensitive emulsion is coated on the first photosensitive emulsion layer to form a second photosensitive emulsion layer, the second photosensitive emulsion layer is covered with a mask for forming print apertures, exposed, A method for producing a screen printing plate, wherein a printing aperture is formed by performing a development process. A method for producing a screen printing plate for producing the screen printing plate according to claim 1, comprising:
After the photosensitive emulsion is coated on the screen to form a photosensitive emulsion layer, this photosensitive emulsion layer is covered with either the introduction aperture formation mask or the printing aperture formation mask. Then, by removing a part of the photosensitive emulsion layer by irradiating with a laser beam, one of the introduction opening portion and the printing opening portion is formed in the photosensitive emulsion layer. ,
Next, by removing the one mask and covering the photosensitive emulsion layer with the other mask and irradiating a laser beam to remove a part of the photosensitive emulsion layer, A method for producing a screen printing plate, wherein the other opening is formed. A method for producing a screen printing plate for producing the screen printing plate according to claim 1, comprising:
After the photosensitive emulsion is coated on the screen to form a photosensitive emulsion layer, both the surface of the photosensitive emulsion layer are covered with an introduction aperture portion forming mask and a printing aperture portion forming mask, respectively. Of the screen printing plate, wherein the exposure depth is adjusted by irradiating and exposing, and development is performed to form an introduction aperture and a print aperture in the photosensitive emulsion layer. Production method.

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