JP5009631B2 - Method for producing screen printing body - Google Patents

Description

  The present invention relates to a method for manufacturing a screen printing body capable of manufacturing a screen printing body excellent in printing accuracy.

  Screen printing that uses a screen printing plate making (hereinafter also simply referred to as “screen plate making” or “plate making”) to form a printed film made of ink, paste, or the like on the surface of the substrate is a fine pattern formation. In addition, since it has excellent mass productivity, it is used in a wide range of industrial fields. In general, screen printing uses a screen mask formed by stretching a mesh whose opening is closed by a resin (for example, a photosensitive emulsion film) or the like, and ink is applied on the upper surface of the screen mask. In this method, printing is performed by extruding the ink material to the lower surface side (base material side) of the screen mask through a predetermined opening formed in the screen mask by placing the material and sliding the squeegee.

  In this screen printing, since the screen mask is flexible and the printing pressure is low, printing on a wide range of printing materials such as paper, cloth, plastic, glass, metal, and ceramics is possible. Further, since the pattern formed by the ink material can be thickened, it is also applied to the manufacture of electronic parts such as thick film ICs (hybrid ICs), printed wiring boards, resistors and capacitors. Incidentally, a screen mask is usually manufactured by patterning a photosensitive emulsion film coated on a mesh by a photolithography technique. Alternatively, it is also manufactured by selectively etching a metal film by a photolithography technique to form a mesh pattern.

  A general screen plate making used for screen printing is a film-shaped screen having a support member composed of a ridge and the like, and a mask material in which openings of a predetermined opening shape are disposed on the support member. The screen is provided with a plate making frame stretched on the inside thereof. In printing, first, the screen-making screen is disposed on the surface (printing surface) of an appropriate printing medium, and ink or paste is placed on the screen. Next, if a squeegee or the like is slid on the screen and paste is extruded from the opening, the opening shape of the opening and a plurality of openings are formed on the printing surface of the printing medium. A print pattern corresponding to the array pattern can be formed.

  For example, in the field of electronic component manufacturing, the above-described screen printing is adopted from the viewpoint of accuracy and mass productivity. In this field, with the recent technical trend of miniaturization of component size, there is an increasing demand for forming a finer print pattern with higher accuracy.

  However, since the platemaking frame has some distortion, it is difficult to make the screen stretched on the platemaking frame completely flat. Furthermore, since the distortion of the plate making frame differs depending on the plate making frame, the arrangement pattern of the openings is slightly different for each screen plate making. Therefore, when screen printing is performed using a plurality of screen plate making with different opening arrangement patterns, there may be a problem that the printing pattern for each screen printing body to be obtained is slightly different.

  In recent years, since the substrate to be printed tends to be enlarged, the screen (screen plate making) used for printing on the enlarged substrate tends to be enlarged as well. Therefore, the difference in the printing pattern for every screen printing body obtained by the enlargement of a board | substrate or screen platemaking became more remarkable.

  If the degree of difference in the opening pattern for each screen making is within a certain tolerance range that is allowed according to the printed material obtained by printing, no particular problem occurs. However, it is necessary to further improve printing accuracy in response to recent technological advances.

  As related prior arts, screen printing plate making (see Patent Document 1) in which the intersecting portions of the wires (紗) constituting the screen support member are engaged, and screen printing plate making that defines the linear thermal expansion coefficient of the plate making frame (See Patent Document 2), a method of screen printing with a predetermined side of a plate making frame curved into a convex shape (see Patent Document 3), and a screen printing plate making provided with a plate making frame that can be deformed in both the inside and outside directions. And a method for producing a printed body using the same (see Patent Document 4). However, even these screen printing plate making and printing methods using these cannot sufficiently meet the demand for ensuring high printing accuracy, and further improvements are required.

JP-A-9-136394 JP-A-11-34288 JP 2000-318120 A JP 2006-62241 A

  The present invention has been made in view of such problems of the prior art, and the object of the present invention is excellent in accuracy even for a large-scale printing body having a large-area printing surface. An object of the present invention is to provide a method for producing a screen printing body that can perform screen printing and can produce a screen printing body having excellent printing accuracy.

  As a result of intensive studies to achieve the above-mentioned problems, the present inventors moved the contact portion between the screen plate-making and the plate-making frame holder in a direction in which the relative distance between the screen plate-making and the substrate to be printed is separated or approached, It has been found that the opening of the screen can be adjusted to have a desired opening shape, and the present invention has been completed.

  That is, according to the present invention, the following method for producing a screen print is provided.

[1] A screen plate making comprising a film-like screen having a mask material in which an opening having one or more predetermined opening shapes is formed, and a flexible plate making frame on which the screen is stretched, On the frame-shaped plate making frame holder arranged in parallel with the inner side or the lower side thereof, the plate-like printing body is placed in parallel with the printing body, and the plate making frame of the screen plate making and the plate making frame holder At least a part of the abutting part is a movable part, and the movable part is deflected by a predetermined distance in a direction in which the relative distance between the screen plate-making and the printing medium is separated or close, thereby bending the plate-making frame. the deflection with the plate making frame to deform the screen by sliding a squeegee on the screen, screen printing is applied to the printed face of the printing material is extruded from the opening Method for producing a charge of position is in a state of being adjusted to the desired position, the screen printing material to obtain a screen printing member in which a predetermined print pattern by screen printing is formed in this state.

  [2] The number of the movable parts is one or more, and the movable parts are independently moved by a predetermined distance in a direction in which the relative distance between the screen plate making and the printing medium is separated or close to each other. A method for producing a screen-printed body according to the above.

  [3] The method for producing a screen printing body according to [1] or [2], wherein the movable part is at least four corners of the screen plate making.

  [4] The method for producing a screen print according to any one of [1] to [3], wherein a ratio of the area of the print pattern to the area of the screen is 25% or more.

  [5] The method for producing a screen print according to any one of [1] to [4], wherein the mask material is made of resin or metal.

[6] The method for producing a screen printing body according to any one of [1] to [5], wherein the printing body is a ceramic substrate, a resin substrate, a glass substrate, or a metal substrate .

  According to the method for producing a screen printing body of the present invention, it is possible to perform screen printing with excellent accuracy even on a large-scale printing body having a large surface to be printed, and a screen printing body with excellent printing accuracy. Can be manufactured.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described below, but the present invention is not limited to the following embodiment, and is based on the ordinary knowledge of those skilled in the art without departing from the gist of the present invention. It should be understood that modifications and improvements as appropriate to the following embodiments also fall within the scope of the present invention.

  FIG. 1 is a side view showing an example of screen plate making used in the method for producing a screen printing body of the present invention, and FIG. 4 is a perspective view showing a state where the screen plate making is placed on a plate making frame holder. As shown in FIG.1 and FIG.4, in one Embodiment of the manufacturing method of the screen printing body of this invention, the screen platemaking 5 is first mounted on the platemaking frame holder 11. FIG. The screen platemaking 5 includes a film-like screen 3 and a platemaking frame 4 on which the screen 3 is stretched. In FIG. 4, reference numeral 15 denotes a plate making frame receiving screw.

  2 and 3 are a top view and a side view showing an example of screen plate making used in the method for producing a screen-printed body of the present invention. As shown in FIGS. 2 and 3, the screen 3 constituting the screen making plate 5 has a mask material 2 in which one or more openings 1 having a predetermined opening shape are formed. The screen 3 usually includes a film-like support member, and a mask material is disposed on at least one film surface of the support member.

  Specific examples of the material constituting the mask material include resin and metal. The screen 3 is formed with openings having a shape and a number corresponding to a desired print pattern. For convenience, FIG. 2 shows a state in which nine openings 1 having a rectangular opening shape are formed. Further, the screen plate making 5 is configured by stretching the screen 3 on the plate making frame 4, and the plate making frame 4 is generally formed of a flexible material.

  As shown in FIG. 1, on the inner side (or lower side) of the frame-shaped plate-making frame holder 11, the flat plate-shaped printing medium 10 is placed on the printing stage 12 so as to be parallel to the frame surface of the plate-making frame holder 11. It is placed. Specific examples of the printing medium 10 include those used in conventional screen printing. Suitable examples of the substrate include a ceramic substrate, a resin substrate, a glass substrate, a metal substrate, and the like.

  The screen plate making 5 is placed on the plate making frame holder 11 so as to be parallel to the printing body 10 (printing surface). At this time, at least a part (movable part 25) of the abutting portion 20 of the screen plate making 5 and the plate making frame holder 11 is disposed in a direction in which the relative distance between the screen plate making 5 and the printing medium 11 is separated or close (Z in FIG. Move in the axial direction). As a method for moving the movable portion 25, for example, as shown in FIG. 1, a spacer 7 having an appropriate thickness may be disposed between the screen plate making 5 and the plate making frame holder 11. The moving distance of the movable portion 25 in the Z-axis direction can be adjusted by appropriately adjusting the thickness of the spacer 7, as well as by combining a plurality of spacers 7a and 7b (see FIG. 5), and a telescopic spacer 17 ( Fine adjustment can be easily performed by disposing an expansion / contraction mechanism (see FIG. 6)).

  When the screen plate making 5 and the movable part 25 of the plate making frame holder 11 are moved in the Z-axis direction by using a spacer 7 or the like, the screen plate making 5 fixed on the plate making frame holder 11 by the air cylinder 6 or the like becomes concave. It will be in a bent state. In this case, since the screen 3 constituting the screen plate making 5 is deformed together with the plate making frame 4, the opening 1 (see FIG. 2) of the screen 3 is also slightly deformed as the screen 3 is deformed. For this reason, it is possible to finely adjust the opening shape of the opening 1 (see FIG. 2) to a desired shape by finely adjusting the moving distance of the movable portion 25 in the Z-axis direction.

  Thus, screen printing is performed in a state where the moving distance of the movable portion 25 in the Z-axis direction is finely adjusted and the opening 1 (see FIG. 2) is adjusted to have a desired opening shape. Specifically, predetermined ink or paste is placed on the screen 3. Next, by sliding a squeegee or the like on the screen 3 (for example, in the X-axis direction) and extruding paste or the like from the opening, the opening shape of the opening and the opening are formed on the surface to be printed 10. When a plurality of prints are formed, it is possible to obtain a screen print on which a print pattern corresponding to the arrangement pattern is formed. Note that printing patterns can be stacked by repeatedly performing printing on the same printing surface.

  According to the method for producing a screen printing body of the present invention, it is possible to perform screen printing in a state in which the opening of the screen 3 is adjusted to have a desired opening shape. Can do. Therefore, it is possible to easily manufacture a screen printing body on which a predetermined printing pattern with high accuracy is formed. Further, even when the printing is repeatedly performed and the screen mesh is stretched, the opening shape of the opening can be adjusted, so that the printing accuracy is hardly lowered. Furthermore, since general screen plate making and screen printing machines can be used without any special modification, the versatility is high and the printing cost can be reduced.

  According to the method for manufacturing a screen printing body of the present invention, the movable portion 25 is moved in the Z-axis direction by fine deformation or distortion of the opening shape of the opening, or the opening shape of the opening slightly different for each screen plate making. Therefore, the desired and accurate and uniform opening shape can be obtained. In addition, even when deformation or distortion occurs in the opening shape of the opening due to repeated printing, the deformation or distortion is eliminated by moving the movable part 25 again in the Z-axis direction by an appropriate amount. Is possible. Accordingly, the method for producing a screen body of the present invention is suitable for printing with higher accuracy than conventional methods and for performing repeated printing over a long period of time.

When screen printing is performed on an LTCC substrate (printed body) having an area of a printing surface of 200 mm × 200 mm (□ 200 mm, 40000 mm ² ), from the viewpoint of suppressing stacking deviation of the LTCC substrate, Usually, a positional accuracy of about 5 μm is required. The method for producing a screen-printed body of the present invention is particularly effective when the size of the plate-making frame (screen) is 300 mm × 300 mm (□ 300 mm, 90000 mm ² ) to 500 mm × 500 mm (□ 500 mm, 250,000 mm ² ). . Further, it is particularly effective when the ratio of the area of the printed pattern to the area of the screen is preferably 25% or more, more preferably 40% or more.

  Although the number of the movable parts 25 is not particularly limited, it is preferably 2 or more, more preferably 4 to 8, more specifically, from the viewpoint of more strictly adjusting the opening shape of the opening. It is preferable that at least four corners of the screen plate making 5 are movable portions 25. If the number of the movable parts 25 is more than 8, adjustment may be complicated. In addition, the movable portion 25 is independently moved by a predetermined distance in a direction in which the relative distance between the screen plate-making plate 5 and the printing medium 10 is separated or close to each other, so that the opening shape of the opening portion is more precisely adjusted to a desired shape. This is preferable because it can be finely adjusted.

  The distance by which each movable part 25 is moved in the Z-axis direction is, for example, after confirming the print pattern by performing a test print without moving any of the movable parts 25 in the Z-axis direction, It suffices to determine so that At this time, it is possible to set the movement distance in the Z-axis direction independently for each of the movable portions 25 present in a plurality of locations, and more precisely control the opening shape of the opening. This is preferable because variations in the positional accuracy of the print pattern of the screen printing body can be reduced.

  The screen printed body obtained by the method for producing a screen printed body of the present invention is composed of at least a dielectric or a conductor, taking advantage of the characteristic that a printed body on which a high-precision printing pattern is formed can be easily produced. And a circuit having a pattern having a passive element or an active element. In addition, a capacitor element etc. can be mentioned as a passive element, and an electromechanical conversion element etc. can be mentioned as an active element.

  EXAMPLES Hereinafter, although this invention is demonstrated concretely based on an Example, this invention is not limited to these Examples.

(Example 1 (Adjustment (1)))
Screen printing was carried out using a 380 mm × 380 mm screen plate making 5 (Murakami Co., Ltd.) as shown in FIGS. The sliding direction of the squeegee was the X-axis direction, and the position of the movable part 25 to be moved in the Z-axis direction (position of the spacer 7) was two places on the right back and left back in the X-axis direction. Also, the Z-axis direction moving distance of the movable part 25 at the right back (the moving distance based on a plane parallel to the printing surface of the printing medium 10, and “+” when moving in the direction away from the printing surface) Was set to +100 μm, and the Z-axis direction moving distance of the movable part 25 at the left back was +50 μm, and screen printing was performed. The Z-axis direction moving distance of the movable part 25 was adjusted by selecting the thickness of the spacer 7. It was 2-3 micrometers when the positional accuracy of the printing pattern formed in the obtained screen printing body was measured. The printing position accuracy was measured at a total of 20 locations within the print pattern range (size = 200 mm × 200 mm). The printing position accuracy was measured and evaluated by the amount of positional deviation from the design coordinates. FIG. 7 is a graph plotting the measurement results of the positional accuracy of the printed pattern, and FIGS. 8 and 9 are enlarged views of the A part and the C part of FIG. 7, respectively. FIG. 10 is a schematic diagram for explaining the measurement points of the positional accuracy of the print pattern. In FIG. 10, the code | symbol 30 shows a printing pattern and code | symbol AH shows a measurement point.

(Example 2 (Adjustment (2)), Comparative Example 1 (Unadjusted))
A screen print was produced in the same manner as in Example 1 except that the moving distance of the movable part in the Z-axis direction was set to the value shown in Table 1. Table 1 shows the measurement results of the positional accuracy of the printed pattern formed on the obtained screen printing body.

  As shown in Table 1, according to the manufacturing method of the screen printing body of Example 1 and Example 2, compared with the manufacturing method of the screen printing body of Comparative Example 1, a printing pattern with higher positional accuracy is formed. It is clear that a screen print can be produced. Also, as shown in FIG. 1, the Z axis direction moving distance of the movable part at the right back is 0 (Comparative Example 1 (unadjusted)), 100 μm (Example 1 (Adjustment (1))), 150 μm (Example 2). It is clear that the printing position tends to shift from the center to the outside by increasing (Adjustment (2)) Therefore, according to the method for manufacturing the screen printing body of the present invention, the movable part It can be seen that a screen printing body with excellent printing accuracy can be manufactured by appropriately adjusting the movement distance in the Z-axis direction.

  The method for producing a screen-printed body of the present invention is suitable as a method for producing various electronic components because it can form a fine pattern and has high versatility and is suitable for mass production.

It is a side view which shows an example of the printing machine used with the manufacturing method of the screen printing body of this invention. It is a top view which shows an example of the screen platemaking used with the manufacturing method of the screen printing body of this invention. It is a side view which shows an example of the screen platemaking used with the manufacturing method of the screen printing body of this invention. It is a perspective view which shows the state which mounts screen platemaking in a platemaking frame holder. It is a side view which shows the other example of the printing machine used with the manufacturing method of the screen printing body of this invention. It is a side view which shows the further another example of the printing machine used with the manufacturing method of the screen printing body of this invention. It is the graph which plotted the measurement result of the positional accuracy of a printing pattern. It is the A section enlarged view of FIG. It is the C section enlarged view of FIG. It is a schematic diagram explaining the measurement point of the positional accuracy of a printing pattern.

Explanation of symbols

1: opening, 2: mask material, 3: screen, 4: plate making frame, 5: screen plate making, 6: air cylinder, 7, 7a, 7b, 17: spacer, 10: substrate to be printed, 11: plate making frame holder , 12: printing stage, 15: plate making frame receiving screw, 20: contact portion, 25: movable portion, 30: printing pattern, A to H: measurement points

Claims (6)

A screen plate making comprising a film-like screen having a mask material in which one or more openings having a predetermined opening shape are formed, and a flexible plate making frame on which the screen is stretched, is formed into a flat plate-shaped substrate. On the frame-shaped plate making frame holder disposed in parallel or on the inner side or lower side, the printed body is placed in parallel with the printed body,
At least a part of a portion of the screen plate making contacted with the plate making frame and the plate making frame holder is a movable portion, and the movable portion is set in a direction in which a relative distance between the screen plate making and the printing medium is separated or close. By moving the plate making frame, the plate making frame is bent, the screen is deformed together with the bending of the plate making frame, and the squeegee is slid on the screen to be pushed out from the opening portion and to be covered by the printing medium. The screen printing material applied to the printing surface is adjusted to the desired position ,
A method for producing a screen printing body in which a screen printing body on which a predetermined printing pattern is formed by screen printing in this state. The number of the movable parts is 2 or more;
The method for producing a screen printing body according to claim 1, wherein the movable parts are independently moved by a predetermined distance in a direction in which a relative distance between the screen plate making and the printing body is separated or close to each other.   The method for producing a screen printing body according to claim 1, wherein the movable part is at least four corners of the screen plate making.   The ratio of the area of the said printing pattern with respect to the area of the said screen is 25% or more, The manufacturing method of the screen printing body as described in any one of Claims 1-3.   The method for producing a screen printing body according to any one of claims 1 to 4, wherein the mask material is made of resin or metal.   The method for producing a screen printing body according to claim 1, wherein the printing body is a ceramic substrate, a resin substrate, a glass substrate, or a metal substrate.

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