JP2009143223A - Method for producing screen print body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a screen print body which can perform screen printing with excellent accuracy even for the large sized body to be printed with the large area surface to be printed and has excellent printing accuracy. <P>SOLUTION: The method is for producing the screen print body having a print pattern formed on the body 10 to be printed by sliding a squeegee over a screen 3 made of a screen printing plate 5 comprising the screen 3 parallel disposed above the body 10 to be printed with keeping a given clearance CL and a printing plate frame 4. The ratio (W/L) of the width (W) of the squeegee to the internal size (L) of the side perpendicular to the axis of the sliding direction of the squeegee in the printing plate frame 4 is 0.45 or more, and an optimum clearance between the body 10 to be printed and the screen 3 is selected and set on the basis of correlation between the clearance CL in the range of 0.1 to 2.0 mm and the degree of deviation in the printing position of the print pattern, under the condition of the value W/L being constant. <P>COPYRIGHT: (C)2009,JPO&INPIT

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. At the time of 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 varies depending on the plate-making frame, the arrangement pattern of the openings on the screen stretched on the plate-making frame 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. In particular, when a laminated electronic component is manufactured by laminating screen printing bodies, a fine deviation of the printing position for each screen printing body causes a more remarkable deviation by laminating them. For this reason, in order to manufacture a higher performance laminated electronic component, it is important that the amount of deviation of the printing position of the screen printing body is within a certain allowable tolerance range.

  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 are sufficient to meet demands such as ensuring high printing accuracy or keeping the printing position deviation within an allowable range. There is a need for further improvement.

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 have determined that, based on the correlation between the clearance between the printing medium and the screen and the amount of printing position deviation of the printed pattern to be formed, It has been found that the above-mentioned problems can be achieved by selecting and setting the optimum clearance, 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 having a mask material with openings formed in parallel with a predetermined clearance maintained above a flat plate-shaped substrate, and a plate-making frame on which the screen is stretched A method for producing a screen printing body, wherein a screen printing body having a predetermined printing pattern formed on the printing body is obtained by sliding in a predetermined direction with a squeegee on the screen of the screen making plate comprising: The ratio (W / L) of the width (W) of the squeegee to the inner dimension (L) of the side perpendicular to the sliding direction axis of the squeegee of the plate making frame is 0.45 or more, and the value of W / L Based on the correlation between the clearance within the range of 0.1 to 2.0 mm and the printing position shift amount of the printing pattern, which is grasped under the condition of constant printing, the optimum between the printing medium and the screen Clear run Method for producing a screen printing member for selecting and setting the.

[2] The method for producing a screen print according to [1], wherein the optimum clearance is selected and set according to the following procedures (1) to (5).
(1) Trial printing is performed with the clearance set to any two or more values within a range of 0.1 to 2.0 mm to obtain a first trial print.
(2) The printing position deviation amount of the first trial printing body is measured, and a calibration curve is obtained by plotting the measured printing position deviation amount with respect to the set clearance.
(3) Trial printing is performed by setting the clearance to a value of one or more points within a range of 0.1 to 2.0 mm to obtain a second trial print.
(4) The printing position deviation amount of the second trial printing body is measured, the printing position deviation amount measured with respect to the set clearance is plotted, and then the calibration curve is offset and plotted Get a virtual calibration curve through
(5) From the virtual calibration curve, select and set the optimum clearance that minimizes the print position shift amount of the print pattern.

[3] The method for producing a screen print according to [1], wherein the optimum clearance is selected and set according to the following procedures (6) to (8).
(6) Trial printing is performed with the clearance set to any two or more values within the range of 0.1 to 2.0 mm to obtain a third trial print.
(7) The printing position deviation amount of the third trial printing body is measured, and a calibration curve is obtained by plotting the measured printing position deviation amount with respect to the set clearance.
(8) Select and set the optimum clearance that minimizes the printing position shift amount of the printing pattern from the calibration curve.

  [4] The method for producing a screen print according to any one of [1] to [3], wherein the clearance is 0.3 to 1.5 mm.

  [5] The method for producing a screen printing body according to any one of [1] to [4], wherein the printing body is a fired ceramic substrate or a ceramic green sheet.

  [6] The method for manufacturing a screen printing body according to [5], wherein the substrate to be printed is the ceramic green sheet, and the screen printing body is a component of a laminated substrate obtained by laminating a plurality of the printing bodies. .

  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. In addition, according to the method for manufacturing a screen printing body of the present invention, it is possible to manufacture a screen printing body in which the shift amount of the printing position is suppressed within a certain range. For this reason, if the screen printing body obtained by the method for producing a screen printing body according to the present invention is used, the total amount of misalignment of printing positions (lamination misalignment) is allowed even when a plurality of these are laminated. Since it can be kept small within the range, a higher performance multilayer electronic component can be provided.

  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. 3 is a perspective view showing a state in which the screen plate making is placed on a plate making frame holder. As shown in FIGS. 1 and 3, in one embodiment of the method for producing a screen printing body of the present invention, first, the screen platemaking 5 is placed on the platemaking frame holder 11. The screen platemaking 5 includes a film-like screen 3 and a platemaking frame 4 on which the screen 3 is stretched. 3 denotes an air cylinder for fixing the screen plate making 5 on the plate making frame holder 11.

  FIG. 2 is a top view showing an example of screen plate making used in the method for producing a screen printing body of the present invention. As shown in FIG. 2, the screen 3 constituting the screen plate making 5 has a mask material 2 in which one or more openings 1 having a predetermined opening shape are formed. Note that the screen 3 is usually provided with a film-like support member (screen mesh) constituted by a bag or the like, and a mask material is disposed on at least one film surface of the screen mesh. The material constituting the screen mesh is not particularly limited, but it is preferable to use a high-strength and high-rigidity material. Specifically, the screen mesh made by Murakami Co., Ltd. ER wire and ERH wire (both are trade names) Examples of suitable materials can be given as examples.

  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 FIGS. 1 and 4, the inner dimension (inner dimension of the plate-making frame 4) of the side perpendicular to the sliding direction axis of the squeegee 4 is “L”, and the width of the squeegee 7 itself (the squeegee 7 )), The value of W / L must be 0.45 or more, preferably 0.5 or more, and more preferably Is 0.55 or more, particularly preferably 0.6 or more. By setting the value of W / L to 0.45 or more, it is possible to produce a screen print with excellent printing accuracy. In a general screen printing method, the value of W / L is often about 0.4. However, when the clearance between the printing medium and the screen is used as a parameter for increasing the printing accuracy, a remarkable effect does not appear when the value of W / L is less than 0.45. Therefore, in the method for producing a screen print of the present invention, the clearance is effectively used as a parameter for improving the printing accuracy by setting the value of W / L to 0.45 or more. Further, by setting the value of W / L to preferably 0.5 or more, more preferably 0.55 or more, and particularly preferably 0.6 or more, the amount of misalignment of the printing position can be reduced even if the clearance is slightly changed. It becomes possible to vary the sensitivity. For this reason, there is an advantage that fine adjustment of the printing position deviation amount is facilitated by setting a larger value of W / L. The upper limit of the W / L value is not particularly limited, but is preferably 0.8 or less.

  As shown in FIG. 1, below the screen 3, a flat plate-like printed material 10 is placed on a printing stage 12 so as to be substantially parallel to the frame surface of the plate making frame 4. Specific examples of the printing medium 10 include those used in conventional screen printing. Suitable printed materials include fired ceramic substrates, ceramic green sheets, resin substrates, glass substrates, metal substrates, and the like.

  As shown in FIG.1 and FIG.4, in the manufacturing method of the screen printing body of this embodiment, on the platemaking frame holder 11, the to-be-printed body 10 (the to-be-printed surface) and the screen 3 become parallel, A screen plate making 5 is placed. At this time, the screen plate making 5 is placed so that a predetermined clearance CL is maintained between the printing medium 10 and the screen 3. The clearance CL to be held needs to be in the range of 0.1 to 2.0 mm, preferably in the range of 0.3 to 1.5 mm, more preferably in the range of 0.4 to 1.5 mm. And By setting the clearance CL within the range of 0.1 to 2.0, there is an advantage that the printing accuracy is hardly lowered even when repeated printing is performed. If the clearance CL is less than 0.1 mm, a defect such as bleeding may occur in the formed print pattern. On the other hand, if the clearance CL is more than 2.0 mm, the amount of elongation of the screen 3 caused by sliding of the squeegee becomes too large, and it may be difficult to repeatedly perform high-precision printing. .

  Conventionally, in order to improve the positional accuracy of a printing pattern formed by screen printing, efforts have been made mainly for ingenuity and improvement of screen plate making, such as employing lithography using a glass mask and increasing the rigidity of a mesh. On the other hand, adjustment of the clearance between the printing medium and the screen has been considered as a factor for controlling the shape of the printed pattern to be formed.

  On the other hand, in the present invention, the clearance within a predetermined numerical range and the printing position deviation amount of the printed pattern to be formed (deviation amount as seen from a desired design value) make the value of W / L constant. It is found that there is a high correlation under the conditions, and using this correlation, the optimum clearance that minimizes the printing position deviation is selected, and the printing medium and the screen are arranged while maintaining the selected optimum clearance. Screen printing. That is, the method for producing a screen printing body of the present invention has not been conventionally focused as a means for improving the positional accuracy of the printing pattern, and the printing position deviation of the printing pattern is adjusted by adjusting the clearance between the printing body and the screen. This is a method that makes it possible to produce a screen printing body with reduced amount and excellent printing accuracy. Hereinafter, further details of the method for producing a screen print of the present invention will be described, focusing on the method for selecting and setting the optimum clearance.

  In the present invention, specific examples of the method for selecting and setting the optimum clearance include the following methods (1) to (5) (first selection and setting method), and (6) to (8). A method (second selection and setting method) by the procedure of (1) can be mentioned.

(First selection and setting method)
(1) Trial printing is performed by setting the clearance to two or more values within a range of 0.1 to 2.0 mm to obtain a first trial print (procedure (1)). Next, (2) the printing position deviation amount of the first trial printing body is measured, and the measured printing position deviation amount is plotted against the set clearance to obtain a calibration curve (procedure (2)).

  In step (2), a calibration curve is created by plotting the measured printing position deviation (mm) against each set clearance (mm). The calibration curve may be created by the nth order least square method based on the plotted points.

  Next, (3) Trial printing is performed by setting a clearance to a value of one or more points within a range of 0.1 to 2.0 mm to obtain a second trial printed body (Procedure (3)). In the procedure (3), normally, a screen plate making having the same design specifications as the screen plate making used in the procedure (2) but different (separate) is used. In general, screen plate making based on the same design specification generally has different printing position deviation amounts even if the clearance is the same because of individual differences. However, since the design specifications are the same, it can be assumed that the correlation between the clearance and the printing position deviation amount is close to each other even if the design is separate.

  The clearance score set in step (3) may be one or more. However, setting a clearance of 3 or more points is not preferable because the procedure becomes complicated.

  Thereafter, (4) the printing position deviation amount of the second trial printing body is measured, the measured printing position deviation amount is plotted against the set clearance, and then the calibration curve is offset and the plotted point is passed. A virtual calibration curve is obtained (procedure (4)). In the procedure (4), similarly to the procedure (2), the measured printing position deviation amount (mm) is plotted against the set clearance (mm).

  Next, the calibration curve (1) created in the procedure (2) is offset in the Y-axis direction, and a virtual calibration curve passing through the plotted points is created. The calibration curve may be offset in the X-axis (clearance) direction and / or the Y-axis (print position deviation amount) direction.

  Next, (5) from the created virtual calibration curve, an optimum clearance that minimizes the printing position shift amount of the print pattern is selected and set (procedure (5)). In step (5), the optimum clearance for the screen plate making is read from the intersection of the printing position deviation amount = 0 (mm) and the virtual calibration curve. Thereafter, the clearance between the printing medium and the screen may be set to the read optimum clearance value, and screen printing may be performed in that state.

(Second selection and setting method)
(6) Trial printing is performed with the clearance set to any two or more values within the range of 0.1 to 2.0 mm to obtain a third trial print (procedure (6)). Next, (7) a printing position deviation amount of the third trial printing body is measured, and a calibration curve is obtained by plotting the measured printing position deviation amount with respect to the set clearance (procedure (7)). The number of clearance points set in step (6) may be two or more, but in order to obtain a higher correlation with the printing position deviation amount, it is preferable to set three or more clearances. It is more preferable to set a clearance of 5 points. However, setting a clearance of 8 points or more is not preferable because the procedure becomes complicated.

  In step (7), a calibration curve is created by plotting the measured printing position deviation (mm) against each set clearance (mm). The calibration curve may be created by the nth order least square method based on the plotted points.

  Next, (8) from the calibration curve, the optimum clearance that minimizes the printing position deviation of the printing pattern is selected and set (procedure (8)). In step (8), the optimum clearance for the screen making is read from the intersection of the printing position deviation amount = 0 (mm) and the virtual calibration curve. Thereafter, the screen plate making with the calibration curve is used, the clearance between the printing medium and the screen is set to the optimum clearance value, and screen printing is performed in that state.

  As described above, when the optimum clearance is selected and set by the first selection and setting method, the screen plate making used to create the calibration curve and the screen plate making for actual printing have the same design. This is particularly effective when the specifications (lots) are separate. On the other hand, when selecting and setting the optimum clearance by the second selection and setting method, it is assumed that the screen plate making used to create the calibration curve and the screen plate making actual printing are the same individual. It is said.

  Further, from FIG. 5, when the value of W / L is 0.4, the correlation between the clearance and the printing position deviation is low, whereas the value of W / L is 0.45, 0.5, 0. In the case of .6 and 0.67, it is clear that the correlation between the clearance and the printing position deviation is extremely high. For this reason, when the value of W / L is set to 0.45 or more, it is possible to accurately grasp the correlation between the clearance and the printing position deviation. Further, from FIG. 5, as the value of W / L is set higher as 0.45 → 0.5 → 0.6 → 0.67, the printing position deviation amount (mm) is plotted against the clearance (mm). It is clear that the slope of the straight line (linear function graph) obtained in this way increases. That is, when the value of W / L is set to a large value, it can be seen that the print position deviation amount varies with high sensitivity by adjusting the clearance.

  In the method for producing a screen printing body of the present invention, the clearance between the printing body and the screen is highly correlated with the printing position deviation amount of the printing pattern and the printing position deviation amount of the printing pattern can be finely adjusted with high sensitivity. Is used as a parameter, and an optimum clearance is selected for printing, so that printing with extremely high accuracy can be performed. Therefore, it is possible to easily manufacture a screen printing body on which a predetermined printing pattern with high accuracy is formed. In addition, 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.

Next, a second embodiment of the method for producing a screen print will be described. A second embodiment of the method for producing a screen printing body includes a screen having a mask material with openings formed in parallel with a predetermined clearance maintained above a flat plate-shaped printing body. A screen printing body having a predetermined printing pattern formed on a substrate by sliding in a predetermined direction with a squeegee on a screen making screen having a plate-making frame on which the screen is stretched of a manufacturing method, the frame in the area of the plate making frame is at 90000Mm ² or more, with respect to the inner dimension of the sides orthogonal to the sliding axis of the squeegee for making frame (L), the ratio of the width of the squeegee (W) (W / L) is 0.45 to 0.8, and based on the correlation between the value of W / L and the print position deviation amount of the print pattern, which is grasped under the condition that the clearance is constant, the squeegee of the optimum width Select and use It is a manufacturing method of the screen printing body to be used. The details will be described below.

  In the second embodiment of the method for producing a screen printing body, as shown in FIGS. 1 and 3, first, the screen plate making 5 is placed on the plate making frame holder 11. In the second embodiment, as shown in FIGS. 1 and 4, the inner dimension (the inner dimension of the plate-making frame 4) of the side perpendicular to the sliding direction axis of the squeegee of the plate-making frame 4 is “L”. When the width (the length of the side perpendicular to the sliding direction axis of the squeegee 7 itself) is “W”, the value of W / L needs to be 0.45 to 0.8. Yes, preferably 0.5 to 0.8, more preferably 0.55 to 0.8, and particularly preferably 0.6 to 0.75. By setting the value of W / L within the range of 0.45 to 0.8, it is possible to manufacture a screen printed body with excellent printing accuracy. In a general screen printing method, the value of W / L is often about 0.4. However, when the clearance between the printing medium and the screen is used as a parameter for increasing the printing accuracy, a remarkable effect does not appear when the value of W / L is less than 0.45. Therefore, in the second embodiment of the method for producing a screen printing body, the clearance is effectively used as a parameter for improving printing accuracy by setting the value of W / L to 0.45 to 0.8. .

  As shown in FIGS. 1 and 4, in the second embodiment of the method for producing a screen printing body, the printing body 10 (the printing surface) and the screen 3 are parallel to each other on the plate making frame holder 11. Next, the screen plate making 5 is placed. At this time, the screen plate making 5 is placed so that a predetermined clearance CL is maintained between the printing medium 10 and the screen 3. The clearance CL to be held needs to be 0.5 mm or more, preferably 0.7 mm or more, more preferably 1.0 mm or more. In addition, although it does not specifically limit about the upper limit of clearance CL, It is preferable to set it as 2.0 mm or less. By setting the clearance CL to 2.0 mm or less, there is an advantage that the printing accuracy is hardly lowered even when repeated printing is performed. Further, by setting the clearance CL to 0.7 mm or more, more preferably 1.0 mm or more, it is possible to vary the printing position deviation amount with high sensitivity even if the W / L value is slightly varied. . For this reason, there is an advantage that fine adjustment of the printing position deviation amount is facilitated by setting the clearance CL larger.

  In the second embodiment, the value of W / L and the printing position deviation amount of the formed printing pattern (deviation amount as seen from the desired design value) have a high correlation under the condition that the clearance CL is constant. Using this correlation, an optimum width squeegee that minimizes the printing position deviation is selected, and screen printing is performed using the selected squeegee. In other words, the second embodiment of the method for producing a screen printing body is based on selecting an optimum method by paying attention to the width of a squeegee that has not been focused on as a means for improving the positional accuracy of the printed pattern. This is a method that makes it possible to produce a screen printing body with reduced printing position displacement amount and excellent printing accuracy. Hereinafter, further details of the second embodiment will be described focusing on a method for selecting an optimum width squeegee.

  In the second embodiment, specific examples of the method for selecting the optimum width squeegee include the following methods (9) to (13) (first selection method) and (14) to (16). ) Method (second selection method).

(First selection method)
(9) Set a value of W / L to any two or more values within the range of 0.45 to 0.8 and perform a test print to obtain a fourth trial print (procedure (9)). . Next, (10) the printing position deviation amount of the fourth trial printing body is measured, and the measured printing position deviation amount is plotted against the set W / L value to obtain a calibration curve (procedure (10)). ).

  FIG. 6 is a graph showing another example in which a calibration curve and a virtual calibration curve are plotted. In FIG. 6, the clearance CL is set to 0.5 mm (Δ), 1.0 mm (●), 1.3 mm (◇), and 1.5 mm (□), and ranges from 0.4 to 0.8. The value of W / L is set in increments of 0.1 and trial printing is performed in the state where each value is set to W / L. The number of W / L values set in step (9) may be two or more, but in order to obtain a higher correlation with the printing position deviation amount, a W / L value of three or more points is required. It is preferable to set, and it is more preferable to set the value of W / L of 4 to 5 points. However, setting a W / L value of 8 points or more is not preferable because the procedure becomes complicated.

  Also, from FIG. 6, when the clearance CL is 0.5 mm, the correlation between the W / L value and the printing position deviation is low, whereas the clearance CL is 1.0 mm, 1.3 mm, and 1 When the thickness is 0.5 mm, it is clear that the correlation between the W / L value and the printing position deviation is extremely high. For this reason, when the clearance CL is set to 1.0 mm or more, it is possible to accurately grasp the correlation between the clearance and the printing position deviation. Further, from FIG. 6, as the clearance CL is set to be as large as 1.0 mm → 1.3 mm → 1.5 mm, a straight line obtained by plotting the printing position deviation amount (mm) against the value of W / L (primary It is clear that the slope of the function graph increases. That is, when the clearance CL is set large, it can be seen that the print position deviation amount varies with high sensitivity by adjusting the width of the squeegee.

  In step (10), as shown in FIG. 6, a calibration curve is created by plotting the measured printing position deviation (mm) against each set W / L value. The calibration curve may be created by the nth order least square method based on the plotted points.

  Next, (11) W / L is set to a value of one or more points within the range of 0.45 to 0.8 and trial printing is performed to obtain a fifth trial print (procedure (11). )). In the procedure (11), normally, the screen plate making used in the procedure (10) has the same design specifications but a different (separate) screen plate making is used. Since screen plate making with the same design specifications generally has individual differences, even if they are set to the same W / L value, there are many cases in which the amount of misregistration of printing positions is different. However, since the design specifications are the same, it can be assumed that the correlation between the value of W / L and the amount of misregistration of printing is close to each other even in separate bodies.

  The number of W / L values set in step (11) may be one or more. However, setting a W / L value of three or more points is not preferable because the procedure becomes complicated.

  After that, (12) Measure the printing position deviation amount of the fifth trial print, plot the measured printing position deviation amount against the set W / L value, and then plot the calibration curve offset A virtual calibration curve that passes through the obtained points is obtained (procedure (12)). In the procedure (12), as in the procedure (10), the measured printing position shift amount (mm) is plotted against the set W / L value.

  Next, the calibration curve (1) created in the procedure (10) is offset in the Y-axis direction, and a virtual calibration curve passing through the plotted points is created. The calibration curve may be offset in the X-axis (W / L) direction and / or the Y-axis (print position deviation amount) direction.

  Next, (13) an optimum width squeegee that satisfies the value of W / L that minimizes the print position shift amount of the print pattern is selected from the virtual calibration curve (procedure (13)). In step (13), the optimum W / L value for the screen plate making is read from the intersection of the printing position deviation amount = 0 (mm) and the virtual calibration curve. Thereafter, a squeegee having an optimum width may be selected from the read optimum W / L value, and screen printing may be performed using the selected squeegee.

(Second selection method)
(14) Trial printing is performed by setting the value of W / L to any two or more values within the range of 0.45 to 0.8 to obtain a sixth trial print (procedure (14)). . Next, (15) the printing position deviation amount of the sixth trial printing body is measured, and the measured printing position deviation amount is plotted against the set W / L value to obtain a calibration curve (procedure (15)). ). The number of W / L values set in step (14) may be two or more, but in order to obtain a higher correlation with the printing position deviation amount, the W / L value of three or more points should be set. It is preferable to set, and it is more preferable to set the value of W / L of 4 to 5 points. However, setting a W / L value of 8 points or more is not preferable because the procedure becomes complicated.

  In step (15), a calibration curve is created by plotting the measured printing position deviation (mm) against the set W / L values. The calibration curve may be created by the nth order least square method based on the plotted points.

  Next, (16) an optimum width squeegee that satisfies the value of W / L that minimizes the print position shift amount of the print pattern is selected from the calibration curve (procedure (16)). In step (16), the optimum W / L value for screen plate making is read from the intersection of the printing position deviation amount = 0 (mm) and the virtual calibration curve. Thereafter, a screen plate making a calibration curve is used, a squeegee having an optimum width is selected from the read optimum W / L values, and screen printing is performed using the selected squeegee.

  As described above, when the squeegee having the optimum width is selected by the first selection method, the screen design used to create the calibration curve and the screen design for actual printing have the same design specifications ( Lot) but separate. On the other hand, when selecting the optimum width squeegee by the second selection method, it is assumed that the screen plate making used to create the calibration curve and the screen plate making actual printing are the same individual. .

  In the second embodiment of the method for producing a screen printed body, in order to perform printing by selecting a squeegee of the optimum width using a W / L value that is highly correlated with the print position shift amount of the print pattern as a parameter, Printing with extremely high accuracy can be performed. Therefore, it is possible to easily manufacture a screen printing body on which a predetermined printing pattern with high accuracy is formed. In addition, 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.

  Specifically, screen printing can be performed as follows. That is, a predetermined ink or paste is placed on the screen 3 (see FIG. 1). Next, when a squeegee or the like is slid on the screen 3 and paste or the like is pushed out from the opening, the opening shape of the opening and a plurality of openings are formed on the surface to be printed 10. Can obtain a screen printing body on which a printing pattern corresponding to the arrangement pattern is formed. Note that printing patterns can be stacked by repeatedly performing printing on the same printing surface.

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 when the size (inner dimensions) of the plate-making frame (screen) is 300 mm × 300 mm (□ 300 mm, 90000 mm ² ) to 400 mm × 400 mm (□ 400 mm, 160000 mm ² ). It is particularly effective. The size of the print pattern is particularly effective when the size is 150 mm × 150 mm (□ 150 mm, 22500 cm ² ) or more, and more preferably 180 mm × 180 mm (□ 180 mm, 32400 mm ² ) or more.

  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.

Moreover, when a to-be-printed body is a ceramic green sheet, it is preferable that a screen printing body is a component of the laminated substrate obtained by laminating | stacking the plurality. Specific examples of the multilayer substrate include an LTCC substrate, a ceramic capacitor, a multilayer piezoelectric actuator, a NO _x / oxygen sensor, and the like. That is, according to the method for producing a screen printing body of the present invention, it is possible to manufacture a printing body on which a highly accurate printing pattern is formed. Therefore, if a plurality of printing bodies are stacked, the stacking deviation between the printing bodies is extremely large. A few LTCC substrates and the like can be easily produced. Further, if the LTCC substrate manufactured in this way is baked or the like, a high-performance circuit substrate in which circuits are arranged with high precision can be manufactured.

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

(Reference Example 1)
Using screen plate making 5 as shown in FIG. 4 (Murakami Co., Ltd., internal dimension (L) = 330 mm × 330 mm) and width (W) squeegee (5 types of different widths (W)) shown in Table 1, Clearances were set in increments of 0.15 mm within a range of 0.3 to 1.5 mm, and trial printing was performed with each clearance to produce 9 × 5 first trial prints. In addition, the size (P ₁ (mm) × P ₂ (mm)) of the print pattern formed by the squeegee having each width is as shown in Table 1. The printing position shift amount (shift amount from the design center) of the produced first trial print was measured. A graph plotting the measurement results is shown in FIG.

(Discussion)
As shown in FIG. 5, when the value of W / L is 0.4, the correlation between the clearance and the printing position deviation is low, whereas the value of W / L is 0.45, 0.5. , 0.6, and 0.67, it is clear that the correlation between the clearance and the printing position deviation is extremely high. Further, as the value of W / L is set higher as 0.45 → 0.5 → 0.6 → 0.67, a straight line obtained by plotting the printing position deviation (mm) against the clearance (mm) It is clear that the slope of the (linear function graph) increases. From this, it can be seen that if the value of W / L is set large, the printing position shift amount can be sharply controlled by fine adjustment of the clearance.

(Reference Example 2)
Using screen plate making 5 (Murakami Co., Ltd., internal dimension (L) 330 mm × 330 mm) as shown in FIG. 4, the clearance CL is divided into four stages of 0.5, 1.0, 1.3, and 1.5 mm. As shown in Table 2, the W / L value is set in increments of 0.1 within the range of 0.4 to 0.8 as shown in Table 2, and trial printing is performed with the respective clearance CL and W / L values. 4 × 5 fourth trial prints were prepared. The width (W (mm)) of the used squeegee and the size (P ₁ (mm) × P ₂ (mm)) of the print pattern formed by each squeegee are as shown in Table 2. The printing position shift amount (shift amount from the design center) of the produced fourth trial print was measured. A graph plotting the measurement results is shown in FIG.

(Discussion)
As shown in FIG. 6, when the clearance CL is 0.5 mm, the correlation between the W / L value and the printing position deviation is low, whereas the clearance CL is 1.0 mm, 1.3 mm, and In the case of 1.5 mm, it is clear that the correlation between the W / L value and the printing position deviation is extremely high. Further, as the clearance CL is set to be as large as 1.0 mm → 1.3 mm → 1.5 mm, a straight line (linear function graph) obtained by plotting the printing position shift amount (mm) against the value of W / L. It is clear that the slope increases. From this, it can be seen that if the clearance CL is set large, the printing position shift amount can be controlled sharply by fine adjustment of the squeegee width.

  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. In addition, according to the method for manufacturing a screen printing body of the present invention, it is possible to make the positional deviation amount of the screen printing body within an allowable tolerance range. Therefore, the method for producing a screen printing body of the present invention has a particularly remarkable effect when a laminated electronic component is produced by laminating a plurality of screen printing bodies.

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 perspective view which shows the state which mounts screen platemaking in a platemaking frame holder. It is a schematic diagram explaining the measurement point of printing position shift amount. It is the graph which plotted the measurement result of the printing position shift amount of the 1st trial printing body. It is the graph which plotted the measurement result of the printing position shift amount of the 4th trial printing body.

Explanation of symbols

1: opening, 2: mask material, 3: screen, 4: plate making frame, 5: screen plate making, 6: air cylinder, 7: squeegee, 10: printing medium, 11: plate making frame holder, 12: printing stage, 30: Print pattern, A to H: Measurement points, CL: Clearance, L: Inner dimensions of plate-making frame, P ₁ , P ₂ : Print pattern size, W: Squeegee width

Claims (6)

A screen having a mask material in which an opening is formed, which is disposed in parallel with a predetermined clearance maintained above a flat plate-shaped printing medium, and a plate-making frame on which the screen is stretched. A method for producing a screen printing body that obtains a screen printing body in which a predetermined printing pattern is formed on the substrate, by sliding the screen plate making screen on a screen with a squeegee in a predetermined direction,
The ratio (W / L) of the width (W) of the squeegee to the inner dimension (L) of the side perpendicular to the sliding direction axis of the squeegee of the plate making frame is 0.45 or more,
Based on the correlation between the clearance within a range of 0.1 to 2.0 mm and the printing position shift amount of the printing pattern, which are grasped under the condition where the value of W / L is constant, the printing medium And a method for producing a screen printing body, wherein an optimum clearance between the screen and the screen is selected and set. The method for producing a screen print according to claim 1, wherein the optimum clearance is selected and set according to the following procedures (1) to (5).
(1) Trial printing is performed by setting the clearance to any two or more values within a range of 0.1 to 2.0 mm to obtain a first trial printing body.
(2) While measuring the printing position deviation | shift amount of said 1st trial printing body, the said printing position deviation | shift amount is plotted with respect to the set said clearance, and a calibration curve is obtained.
(3) Trial printing is performed by setting the clearance to a value of one or more points within a range of 0.1 to 2.0 mm to obtain a second trial print.
(4) The printing position deviation amount of the second trial printing body is measured, the printing position deviation amount measured with respect to the set clearance is plotted, and then the calibration curve is offset and plotted Get a virtual calibration curve through
(5) From the virtual calibration curve, select and set the optimum clearance that minimizes the print position shift amount of the print pattern. The method for producing a screen print according to claim 1, wherein the optimum clearance is selected and set according to the following procedures (6) to (8).
(6) Trial printing is performed with the clearance set to any two or more values within the range of 0.1 to 2.0 mm to obtain a third trial print.
(7) The printing position deviation amount of the third trial printing body is measured, and a calibration curve is obtained by plotting the measured printing position deviation amount with respect to the set clearance.
(8) Select and set the optimum clearance that minimizes the printing position shift amount of the printing pattern from the calibration curve.   The said clearance is 0.3-1.5 mm, 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 claim 1, wherein the printing body is a fired ceramic substrate or a ceramic green sheet. The substrate to be printed is the ceramic green sheet;
The method for producing a screen printing body according to claim 5, wherein the screen printing body is a component of a laminated substrate obtained by laminating a plurality of the screen printing bodies.

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