JP2002362056A - Method for manufacturing screen for screen printing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a screen for screen printing by which the surface of a resist film can be leveled without leaving unevenness thereon and a printing pattern with good printing accuracy can be formed. SOLUTION: In a method for manufacturing the screen 10 for the screen printing by which the resist film 12 comprising a photo-sensitive emulsion 20 is formed on a screen mesh 11, the surface 14 on the side being brought into contact with an article to be printed is coated with the photo-sensitive emulsion 20 and the back surface 15 being the opposite face is coated with the photo-sensitive emulsion 20 and the surface 14 is coated again with the photo-sensitive emulsion with an amount of one half of the amount coated at first and is dried and the surface 14 is coated with the photo-sensitive emulsion 20 a plurality of times and is dried and this process is repeated and before the final drying at the time when the thickness of the photo-sensitive emulsion 20 on the surface reaches a required thickness, a flexible member 23 is stuck on the top face and while the top face of the flexible member 23 is pressed by means of a spatulate member 26, it is moved to remove air 24 between it and the photo-sensitive emulsion 20 and the photo-sensitive emulsion 20 is dried and then, the flexible member 23 is released and removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a screen used for screen printing, and more particularly to a screen printing screen used for screen printing on a ceramic substrate or the like using various printing pastes. And a method for producing the same.

[0002]

2. Description of the Related Art As shown in FIGS. 12 (A) and 12 (B), a conventional screen 50 for screen printing has a vertical line 51 and a horizontal line 52 made of synthetic fibers such as polyester, nylon, tetron or the like, or stainless fine lines. A screen mesh 53 formed in a mesh shape by alternately weaving is fixed to a screen plate frame, a photosensitive emulsion is applied to both sides, dried and adhered, and a printed material of the screen mesh 53 to which the photosensitive emulsion is adhered is formed. A photosensitive mask on the side in contact with
Exposure and development are performed to remove the photosensitive emulsion in a desired print pattern portion to form a screen pattern 54, and the remaining photosensitive emulsion is cured to form a resist film 55. The printing paste is placed on the screen 50 for screen printing, and the printing paste is pushed out from the gap 56 of the screen mesh 53 of the screen pattern 54 by a squeegee (a jig for scraping out the printing paste). A desired pattern is printed on a printing substrate made of However, in this printing, irregularities are formed on the surface of the resist film 55 by the influence of the vertical lines 51 and the horizontal lines 52 of the screen mesh 53 alternately and the voids 56, and the printed material and the resist film 55 Adhesion deteriorates, and the printing paste oozes into the gap. Therefore, as shown in FIG. 13, the dripping 58 of the printing paste occurs at the edge of the print pattern 57 printed on the printing medium, and the printing accuracy is deteriorated.

In order to solve the above-mentioned problem, a method of attaching a smooth plate-like member to a wet photosensitive emulsion and drying the photosensitive emulsion to smooth the surface of the resist film, In order to form a thick film, it is possible to repeat coating, smoothing, and drying of a photosensitive emulsion.
-34462.

[0004]

However, the conventional method for manufacturing a screen for screen printing as described above has the following problems. (1) When the photosensitive emulsion is dried by attaching a smooth plate-like member to the photosensitive emulsion, air bubbles between the photosensitive emulsion and the plate-like member are dried without being removed, and the unevenness remains due to the bubbles. In addition, when printing with the printing paste, the bleeding of the paste appears, causing dripping in the print pattern. (2) If the application, smoothing and drying of the photosensitive emulsion are repeated to form a thick resist film, the irregularities of the generated bubbles are successively promoted with each repetition and become larger. Further, by smoothing and drying the photosensitive emulsion each time it is coated, the work efficiency of screen production is reduced. (3) In the application of the photosensitive emulsion formed on both sides of the screen mesh, the photosensitive emulsion jumps out of the gap portion of the mesh, resulting in a decrease in printing accuracy. The present invention has been made in view of such circumstances,
An object of the present invention is to provide a method for manufacturing a screen for screen printing, which can form a printed pattern with high printing accuracy by making the surface of the resist film flat without leaving any irregularities.

[0005]

According to the present invention, there is provided a method for manufacturing a screen for screen printing according to the present invention, comprising forming a printing pattern comprising a photosensitive emulsion on a screen mesh fixed to a screen plate frame. In the method of manufacturing a screen for screen printing provided with a resist film, a first step of coating a photosensitive emulsion on a surface of a screen mesh which is a contacting surface of a printing material, and a step of coating a photosensitive emulsion on a back surface of the screen mesh. A second step, and a third step of recoating the surface of the screen mesh with substantially half the amount of the photosensitive emulsion applied in the first step;
A fourth step of drying the photosensitive emulsion applied to the front and back surfaces of the screen mesh; and applying the photosensitive emulsion to the surface of the screen mesh again one or more times, and drying the applied photosensitive emulsion. A fifth step of coating the photosensitive emulsion one or more times and repeating the drying and coating treatments to adjust the thickness of the photosensitive emulsion applied to the surface of the screen mesh to a desired thickness; A sixth step of adhering a flexible member having a smooth surface to the upper surface of the undried photosensitive emulsion in the upper stage, and the linearity that the upper surface of the flexible member is provided at the tip of the spatula member. A seventh step of removing air remaining between the photosensitive emulsion and the flexible member by pressing and sliding the edge while having an edge portion, and drying the photosensitive emulsion to which the flexible member is attached. Eighth step, peeling off the flexible member, Having a ninth step of removed by.

[0006] This makes it possible to form a print pattern with less dripping without leaving air bubbles between the photosensitive emulsion and the flexible member. In addition, the attachment of a flexible member to make the photosensitive emulsion have a desired thickness is performed by one step.
Since it can be performed only by the degree, the screen can be efficiently manufactured. Furthermore, in the application of the photosensitive emulsion, after coating on the front side of the screen mesh, then the back side, by applying the first half of the photosensitive emulsion again on the front side, without popping out again on the back side, The photosensitive emulsion that has protruded from the mesh when coated on the back surface can be leveled, and a flat surface can be ensured even when the photosensitive emulsion is formed on the front surface. The effect can be increased.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is an enlarged cross-sectional view of a screen manufactured by the method for manufacturing a screen for screen printing according to one embodiment of the present invention, and FIGS.
FIG. 10 is an explanatory view of a process of the method for manufacturing a screen printing screen, and FIG. 11 is an explanatory view of a printing pattern printed using the screen manufactured by the method for manufacturing a screen printing screen.

As shown in FIG. 1, a screen 10 manufactured by a method for manufacturing a screen for screen printing according to an embodiment of the present invention has a rectangular screen plate frame 16 (see FIG. 2). A photosensitive emulsion is applied to a screen mesh 11 having fixed sides, dried, exposed, and developed to form a screen pattern (printing pattern) 13 having openings in a resist film 12.
The resist film 12 is firmly bonded to both sides of the screen mesh 11, and the surface of the resist film 12 formed on the surface 14 of the screen mesh 11 on the side in contact with the printing material is formed flat. The resist film 12 on the surface 14 on the side in contact with the printing material is formed to have a desired thickness, and the back surface 15 on the side opposite to the surface 14 of the screen mesh 11.
And the amount of the printing paste pushed out to the surface 14 side is adjusted. The thickness of the resist film 12 on the back surface 15 side is small because a squeegee for flowing the printing paste moves on the front surface.

Next, a method of manufacturing a screen for screen printing according to an embodiment of the present invention will be described in detail through steps. First, as shown in FIGS. 2A and 2B, a substantially rectangular screen plate frame 16 made of aluminum or the like is provided with a vertical line 17 and a horizontal line 18 made of, for example, a stainless steel thin line having a desired thickness. Woven alternately to form
The screen mesh 11 having a desired gap portion 19 is fixed by bonding. On the surface 14 of the screen mesh 11 on the side in contact with the printing material, the photosensitive emulsion 20 is bucket 2
Apply 1 round trip while sliding using 1. As a result, the space 19 is embedded and the screen mesh 11 is
Is covered with a photosensitive emulsion 20 having a thickness of about 5 μm or more.

Next, as shown in FIG. 3, a photosensitive emulsion 20 is applied to the back surface 15 on the side where the printing paste of the screen mesh 11 is placed and extruded by using a bucket 21 in one reciprocation. Thus, the photosensitive emulsion 20 is formed on both the front surface 14 and the rear surface 15.

Next, the surface 14 of the screen mesh 11
The photosensitive emulsion 20 is again slid using the bucket 21 on the film of the photosensitive emulsion 20 formed above, and substantially half the amount of the photosensitive emulsion 20 applied to the front surface 14 and the back surface 15 described above. Apply the amount for one way. As a result, the photosensitive emulsion 2 coated on the surface 14 in the above-described process is obtained.
The photosensitive emulsion 20 extruded from the gap 19 of the screen mesh 11 toward the front surface 14 can be leveled by the photosensitive emulsion 20 in which 0 is coated on the back surface 15.

Next, as shown in FIG.
The screen plate frame 16 provided with the screen mesh 11 coated with
Is dried at 37 ± 2 ° C. for about 20 minutes, for example.

Next, as shown in FIG. 6, the photosensitive emulsion 20 is applied to the surface 14 side a plurality of times (sometimes once), for example, three times.
~ 4 reciprocal coatings, photosensitive emulsion 20 in dryer 22
Is dried, for example, at 37 ± 2 ° C. for about 15 minutes.

Next, as shown in FIG.
The photosensitive emulsion 20 is coated on the side several times (sometimes once), for example, three to four reciprocations, and dried in a dryer 22 at 37 ± 2 ° C. for about 15 minutes. I do. The drying process and the coating process are repeated until the entire thickness of the photosensitive emulsion 20 on the surface 14 side reaches a desired thickness. And the last (top) undried photosensitive emulsion 2
A flexible member 23 having a smooth surface, such as a resin film, is attached to the upper surface of the zero. In this attachment, since the surface of the photosensitive emulsion 20 is uneven following the unevenness of the screen mesh 11, the air 24 is trapped between the photosensitive emulsion 20 and the flexible member 23.

Next, as shown in FIG.
The upper surface of the flexible member 23 affixed to the upper surface is slidingly moved one reciprocally while being pressed by a linear edge portion 25 provided at the front end of a spatula member 26 such as an empty bucket. . Thereby, while removing the air 24 caught between the photosensitive emulsion 20 and the flexible member 23,
The flexible member 23 is brought into close contact with the photosensitive emulsion 20.

Next, as shown in FIG.
The photosensitive emulsion 20 is dried at, for example, 37 ± 2 ° C. for about 15 minutes in a dryer 22 with the flexible member 23 adhered to the photosensitive emulsion 20.

Next, as shown in FIG. 10, the flexible member 23 is peeled off from the surface of the dried photosensitive emulsion 20 and removed. Thus, a photosensitive emulsion 20 having a flat surface can be obtained on the surface 14 side.

Thereafter, a photosensitive mask is brought into contact with the upper surface of the photosensitive emulsion 20 on the surface 14 thus manufactured,
Exposure and development for desired screen pattern 13
Is removed, and the remaining photosensitive emulsion is cured to form a resist film 12, whereby a screen for screen printing is manufactured.

As shown in FIG. 11, when a metal paste is printed on, for example, a ceramic substrate 27 using a screen printing screen manufactured by the above-described method, a printing pattern 28 is formed on the ceramic substrate 27 and the flat surface. Since the resist film 12 made of the photosensitive emulsion 20 having the following characteristics can be closely adhered without gaps, a pattern without dripping can be formed at the edge portion of the print pattern 28.

[0020]

According to the first aspect of the present invention, there is provided a method for manufacturing a screen for screen printing, comprising: a first step of coating a photosensitive emulsion on a surface of a screen mesh, which is an abutting surface of a printing material; Second to apply a water-soluble emulsion
A third step of coating the surface of the screen mesh with the photosensitive emulsion substantially in half the amount applied in the first step again, and drying the photosensitive emulsion applied to the front and back surfaces of the screen mesh; A fourth step of coating the photosensitive emulsion once or more times on the surface of the screen mesh, drying the coated photosensitive emulsion, and further drying the photosensitive emulsion.
Or a fifth step of performing a coating process a plurality of times, repeating a drying process and a coating process to obtain a desired thickness of the photosensitive emulsion applied to the surface of the screen mesh, and an undried top layer of the screen mesh. A sixth step of attaching a flexible member having a smooth surface to the upper surface of the photosensitive emulsion, and the upper surface of the flexible member is formed by a linear edge portion provided at the tip of the spatula member. A seventh step of removing air remaining between the photosensitive emulsion and the flexible member by sliding while pressing, and an eighth step of drying the photosensitive emulsion to which the flexible member has been attached.
Forming a pattern with little sag in the print pattern without leaving air bubbles between the photosensitive emulsion and the flexible member, since the method has a step and a ninth step of peeling and removing the flexible member. Can be. Further, a flexible member for attaching the photosensitive emulsion to a desired thickness can be attached only once, and the screen can be efficiently manufactured. Furthermore, after the photosensitive emulsion is applied to the front side of the screen mesh and then to the back side, the first half of the photosensitive emulsion is applied to the front side again, so that the back side does not pop out again and is applied to the back side. The photosensitive emulsion that has protruded from the mesh can be smoothed out on the surface side when it is made, and a flat surface can be secured even if the photosensitive emulsion is formed on the surface, increasing the effect of attaching flexible members. can do.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a screen manufactured by a method for manufacturing a screen for screen printing according to an embodiment of the present invention.

FIGS. 2A and 2B are explanatory diagrams of steps of a method for manufacturing a screen for screen printing.

FIG. 3 is an explanatory diagram of steps in a method for manufacturing the screen for screen printing.

FIG. 4 is an explanatory diagram of steps of a method for manufacturing the screen for screen printing.

FIG. 5 is an explanatory diagram of steps of a method for manufacturing the screen for screen printing.

FIG. 6 is an explanatory diagram of steps of a method for manufacturing the screen for screen printing.

FIG. 7 is an explanatory view of a step of the method for manufacturing a screen for screen printing.

FIG. 8 is an explanatory diagram of steps of a method for manufacturing the screen for screen printing.

FIG. 9 is an explanatory diagram of steps of a method for manufacturing the screen for screen printing.

FIG. 10 is an explanatory view of a step in the method for manufacturing a screen for screen printing.

FIG. 11 is an explanatory diagram of a printing pattern printed using a screen manufactured by the method for manufacturing a screen for screen printing.

FIGS. 12A and 12B are partially enlarged plan views illustrating a conventional screen printing screen, respectively.
It is sectional drawing.

FIG. 13 is an explanatory diagram of a printing pattern printed using a screen manufactured by a conventional screen printing screen manufacturing method.

[Explanation of symbols]

10: Screen for screen printing, 11: Screen mesh, 12: Resist film, 13: Screen pattern, 14: Front surface, 15: Back surface, 16: Screen frame,
17: vertical line, 18: horizontal line, 19: gap, 20: photosensitive emulsion, 21: bucket, 22: dryer, 23: flexible member, 24: air, 25: edge, 26: spatula member ,
27: ceramic substrate, 28: printed pattern

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H096 AA19 CA12 CA20 JA02 2H114 AB09 AB17 BA01 BA10 EA08 GA11 GA32 GA34 GA38

Claims (1)

[Claims] In a method for manufacturing a screen for screen printing, a resist film for forming a pattern for printing made of a photosensitive emulsion is provided on a screen mesh fixed to a screen plate frame. A first step of coating the photosensitive emulsion on the front surface, a second step of coating the photosensitive emulsion on the back surface of the screen mesh, and a first step of coating the front surface of the screen mesh on the screen mesh A third step of re-applying the photosensitive emulsion in an amount substantially half the amount obtained, a fourth step of drying the photosensitive emulsion applied on the front and back surfaces of the screen mesh, and The photosensitive emulsion is applied one or more times again, the applied photosensitive emulsion is dried, and the photosensitive emulsion is applied one or more times. A fifth step of repeating the drying process and the coating process to adjust the thickness of the photosensitive emulsion applied to the surface of the screen mesh to a desired thickness; and A sixth step of attaching a flexible member having a smooth surface to the upper surface of the photosensitive emulsion, and a linear edge provided on the tip of the spatula-shaped member; A seventh step of sliding and moving while pressing at the portion to remove air remaining between the photosensitive emulsion and the flexible member, and drying the photosensitive emulsion to which the flexible member is attached And a ninth step of peeling and removing the flexible member. A method for manufacturing a screen for screen printing, the method comprising: