JP2019001148A - Squeegee, squeegee plate holding tool, and screen printing equipment - Google Patents

Abstract

To provide a squeegee capable of arbitrarily adjusting an abutting state on a surface to be printed according to flatness of an end face and a pattern on a printing plate side and the like.SOLUTION: A squeegee 2 is configured to apply ink paste on a base material. In this case, the squeegee includes: a squeegee plate 20 having an abutting section 200 moving while abutting on a printing plate; and a squeegee plate holding tool 23 and a locking screw 25 which adjust deformation amount per unit load applied to the squeegee plate 20 at a plurality of portions in the range abutting on at least a printing region of the printing plate of the squeegee plate 20.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a squeegee, a squeegee plate holder, and a screen printing apparatus.

Currently, screen printing is used to manufacture electronic components. With the downsizing and high functionality of electronic devices, there is an increasing demand for high density wiring of electronic components. One technique for increasing the wiring density is a multilayer circuit board. The multilayer circuit board is a circuit in which a circuit is formed on both surfaces of a base material, or the circuit is a multilayer of two or more layers. Known multilayer circuit boards are described in, for example, Patent Document 1, Patent Document 2, and Patent Document 3.
The hybrid multilayer circuit board described in Patent Document 1 is a multilayer flexible circuit wiring board. In Patent Document 1, a multilayer circuit board or a hard circuit board on which a plurality of types of electronic components are mounted can be connected to a separate flexible printed wiring board via a connector or the like, or a flexible flat cable can be integrated. A circuit board having a flexible cable portion is described. Such multilayer circuit boards are often used in notebook computers, digital cameras, mobile phones, game machines, and the like.

  Patent Document 2 describes a multilayer circuit board (multilayer printed wiring board) in which the layers of the multilayer circuit board are connected using a conductive paste. However, interlayer connection using a conductive paste requires the formation of bottomed vias, through-holes or bumps, or the conductive layer needs to be filled with a conductive paste. When the contact member is formed under the conductive paste in this way, it becomes difficult to control the shape and height of the upper surface of the conductive paste with high accuracy. When the conductive paste is filled by printing using a known resin squeegee rubber or the top surface of the conductive paste is leveled, the pressure applied to the conductive paste by the squeegee is distributed, and the shape and height of the top surface of the conductive paste are increased. May not be uniform. The non-uniformity in the shape and height of the upper surface of the conductive paste has contributed to cracks between layers and a decrease in flatness of the substrate.

  Patent Document 3 describes that a pressing member is provided on the back surface (back surface) of the squeegee facing the ink paste with a gap from the back surface. In the screen printing apparatus described in Patent Literature 3, while the squeegee is pressed against the screen, the squeegee is pressed against the presser member to make it difficult to bend. In screen printing, since the screen tension is high at both ends in the width direction of the squeegee, the squeegee is greatly deformed at both ends rather than the central portion, and the effective pressure applied to the screen is reduced. The squeegee described in Patent Document 3 includes a pressing member at least at both ends, and prevents a decrease in pressure at both ends, and makes the pressure applied to the printing surface uniform at the center and both ends.

JP-A-1-7697 JP2015-61058A JP 2006-168278 A

However, such a squeegee disclosed in Patent Document 3 cannot make uniform the pressure variation on the printing surface which is irregularly generated due to the manufacturing accuracy of the squeegee or deterioration with time. In particular, it is known that a resin squeegee plate is difficult to increase the accuracy of the flatness of the end face pressed against the printing surface, and the pressure applied to the printing surface is likely to vary.
Further, even when the flatness of the squeegee end surface is sufficiently high, a phenomenon in which the ink paste in the extraction pattern is scraped off by the squeegee may occur in the “extraction pattern” in which metal or resin on the printing mask does not exist. When such a phenomenon occurs, the height and surface shape of the wiring cannot be controlled, and there is a concern that the reliability of the wiring is reduced.
The present invention has been made in view of these points, and a squeegee and a squeegee plate that can arbitrarily adjust the contact state with the printing surface according to the flatness of the squeegee end face, the pattern on the printing plate side, and the like. The present invention relates to a holder and a screen printing apparatus.

The squeegee of the present invention is a squeegee for applying an ink paste on a substrate, and has a squeegee plate that moves while abutting against a printing plate, and at least a printing area of the printing plate of the squeegee plate. A deformation adjusting unit that adjusts a deformation amount per unit load applied to the squeegee plate at a plurality of locations in the abutting range.
The squeegee board holder of the present invention is a squeegee board holder for holding a squeegee board for applying ink paste on a base material via a printing plate, and a plurality of the squeegee boards in contact with a printing area of the printing plate. In this point, a deformation adjusting unit for adjusting a deformation amount per unit load applied to the squeegee plate is included.
The screen printing apparatus of the present invention has the squeegee or the squeegee plate holder.

  The present invention can provide a squeegee, a squeegee plate holder, and a screen printing apparatus that can arbitrarily adjust the contact state with the printing surface according to the flatness of the squeegee end face, the pattern on the printing plate side, and the like.

It is a figure for demonstrating the printing plate common to 1st embodiment and 2nd embodiment of this invention. It is a perspective view of the squeegee of 1st embodiment of this invention. It is a front view of the squeegee shown in FIG. FIG. 3 is a top view of the squeegee shown in FIG. 2. FIG. 3 is a bottom view of the squeegee shown in FIG. 2. FIG. 3 is a plan view of the squeegee shown in FIG. 2. It is sectional drawing of the squeegee shown in FIG. It is a figure for demonstrating the press plate piece and set screw which were shown in FIG. It is a schematic diagram for demonstrating a deformation | transformation of the squeegee board shown in FIG. It is a figure for demonstrating an example of the detection of the printing pressure distribution of 1st embodiment of this invention. It is a figure for demonstrating the screen printing apparatus of 1st embodiment of this invention. It is a figure for demonstrating the process of manufacturing a three-layer flexible printed wiring board. It is a figure for demonstrating the manufacturing process of the three-layer flexible printed wiring board following FIG. It is a figure for demonstrating the manufacturing process of the three-layer flexible printed wiring board following FIG. It is a figure for demonstrating the squeegee of 2nd embodiment of this invention. It is a figure for demonstrating the metal plate used with the printing apparatus of 3rd embodiment of this invention.

  Hereinafter, a first embodiment and a second embodiment of the present invention will be described with reference to the drawings. In all the drawings, the same constituent elements are denoted by the same reference numerals, and redundant description is omitted as appropriate. The drawings of the first embodiment are for explaining each component of the squeegee, the squeegee holder, and the screen printing apparatus, the relationship between the components, the positional relationship, and the operation, and the width, thickness, and length thereof. These are not necessarily expressed accurately. Further, the squeegee, the squeegee holder and the screen printing apparatus according to the first embodiment are not limited to the width, thickness, length, etc. shown in the drawing, and can be arbitrarily designed. is there.

  FIG. 1 is a diagram for explaining a printing plate common to the first and second embodiments of the present invention. FIG. 1 is a perspective view of the screen printing plate 10. In the present embodiment, the z direction of the coordinates shown in FIGS. 1 to 3 is “up” of the screen printing plate 10 and the −z direction is “down”.

The screen printing plate 10 shown in FIG. 1 includes a screen mesh 5 that is stretched over the opening 1 a of the plate frame 1. The plate frame 1 is a frame formed of stainless steel, aluminum alloy or the like made into a hollow frame or cast. The opening 1a of the plate frame 1 has a square shape or a rectangular shape, and is at least one size larger than a region (print region) 9 where printing is performed.
The screen mesh 5 is a mesh material formed by weaving yarn (wire) such as polyester or stainless steel. Generally, when the wire diameter of the screen mesh 5 is large, the number of meshes is reduced, and when the wire diameter is thin, the number of meshes is increased. The wire diameter and material of the screen mesh 5 are determined by the strength required for the screen mesh 5, the thickness of the printed coating film printed by the screen printing plate 10, and the like. The diameter of the cross section of the yarn used for the screen mesh 5 is about 250 μm to 20 μm when the yarn is synthetic fiber such as polyester, and about 160 μm to 12 μm when the yarn is metal. The number of meshes is determined by the strength required for the screen mesh 5 and the printing resolution. Generally, the number of lines per inch of the screen mesh 5 is about 25 to 500 when the yarn is synthetic fiber, and about 40 to 900 when the yarn is metal.

  The screen mesh 5 is fixed to the plate frame 1 with an adhesive or the like with a certain amount of tension (also called tension). At that time, since the screen mesh 5 corresponds to various printing pattern shapes, the screen mesh 5 is usually fixed with a so-called bias tension, which is fixed to the plate frame 1 with an angle in the yarn direction of the screen mesh 5. .

  A printing mask 7 is formed on the screen mesh 5. The printing mask 7 is an emulsion film (emulsion film) that covers the screen mesh 5, and the printing mask 7 has an opening 8 in which no emulsion film is formed. The plate 10 matches the print pattern to be printed. As the emulsion used for the printing mask 7, for example, a photosensitive emulsion is used. Photosensitive emulsions are roughly classified into diazo type and SBQ (stilbazolium) type depending on the type of photosensitive group. The selection of the photosensitive emulsion is performed based on the material, resolution, exposure sensitivity, emulsion film thickness and supply form. The print pattern shown in FIG. 1 is a pattern of a wiring layer printed on the substrate. In the present embodiment, an example in which the screen printing plate 10 prints a wiring layer of an electronic component on a substrate will be described.

In the present embodiment, an area in the print mask 7 where an image to be printed is formed is referred to as a “print area” 9. Ink paste remains after screen printing outside the printing area 9 of the printing mask 7, and the remaining ink paste is scraped off by a squeegee during screen printing. The position of the printing area 9 in the printing mask 7 is arbitrary, but it is within the range of 50% or less of the vertical and horizontal lengths of the opening 1a from the viewpoint of the quality of the printing pattern and the center thereof. It is desirable to include a part.
From the above viewpoint, in the first embodiment, the print region 9 includes, for example, the intersection of the center lines in the two directions of the opening 1a, and the length in one direction is 50% of the corresponding direction of the opening 1a. Hereinafter, the length in the other direction may be 50% or less of the corresponding direction of the opening 1a.

[First embodiment]
(Constitution)
FIGS. 2 to 7 are views for explaining the squeegee 2 of the first embodiment. FIGS. 2 to 7 all show the squeegee 2 and the coordinate axes. 2 is a perspective view of the squeegee 2, FIG. 3 is a front view of the squeegee 2 of FIG. 2 viewed from the x direction, FIG. 4 is a top view of the squeegee 2 viewed from the −z direction, and FIG. FIG. 6 is a side view of the squeegee 2 viewed from the y direction, and FIG. 7 is a cross-sectional view of the squeegee 2 taken along arrows VII-VII.
The squeegee 2 is a member that applies an ink paste onto the base material w shown in FIG. 11, for example, and has a contact portion 200 that moves while contacting the screen printing plate 10 shown in FIG. It has. Further, the squeegee 2 has a portion for adjusting the deformation amount per unit load applied to the squeegee plate 20 at a plurality of locations in the range where the squeegee plate 20 contacts at least the printing area of the screen printing plate 10.
The squeegee plate 20 is a plate member made of a rubber material such as urethane rubber, silicon rubber, or synthetic rubber. As the rubber material of the squeegee plate 20, one having a hardness of about 70 (durometer A hardness) is known. The hardness of the squeegee plate 20 can be adjusted by the composition of urethane rubber or the like. Further, the squeegee plate 20 includes a flat shape, a square shape, a sword shape, and the like depending on the shape of the abutment portion 200.

  Here, “adjusting the deformation amount per unit load” described above will be described. The unit load referred to in the first embodiment is the contact portion when the entire width of the contact portion 200 is moved (squeezing operation) in one direction (squeezing direction) while pressing the entire width of the contact portion 200 against a flat member such as a plate material. This is a value obtained by normalizing the frictional force 200 receives from a plane. Further, the amount of deformation refers to the amount by which each part of the contact portion 200 is displaced in the thickness direction of the squeegee plate 20 in the process of the squeezing operation. In the first embodiment, among the thickness direction, the amount of distortion for each local region where the contact portion 200 is distorted in the squeezing direction, particularly during squeezing, is defined as the deformation amount. The adjustment refers to performing at least one of an increase or a decrease with the intention of such a deformation amount (distortion amount).

  The printing area referred to in the first embodiment is an area where the opening portion 8 exists in the printing mask 7 as described in FIG. When there are a plurality of print masks 7, the area where the individual print masks 7 exist is not the print area 9 but the area including the plurality of opening portions 8 is the print area 9. Many of the print areas 9 include the central portion of the opening 1a shown in FIG. 1 from the viewpoint of the quality of a print pattern such as wiring formed by printing. Therefore, the range of the squeegee plate 20 of the first embodiment that contacts at least the printing area of the screen printing plate 10 includes the center of the squeegee plate 20 in the width direction.

In addition, the squeegee 2 has a squeegee plate holder 23 that holds the squeegee plate 20. The squeegee plate holder 23 is a squeegee plate holder that holds the squeegee plate 20, and per unit load applied to the squeegee plate 20 at a plurality of locations of the squeegee plate 20 that abuts the printing region 9 of the screen printing plate 10. A part for adjusting the amount of deformation is included.
That is, the squeegee plate holder 23 includes a first plate member 21 and a second plate member 22 that hold the squeegee plate 20. As shown in FIGS. 2 and 6, both the first plate member 21 and the second plate member 22, which are both plate members, have a rectangular shape that is long along the y axis when viewed from the front. The first plate member 21 has a long rectangular substrate portion 26 along the y-axis. The second plate member 22 is formed integrally with the substrate portion 26 together with the substrate portion 26, and the direction along the y axis (hereinafter referred to as “width direction”) is more than that of the first plate member 21. A short additional plate portion 28 is provided. With such a configuration, the second plate member 22 of the first embodiment has a portion whose length in the direction perpendicular to the width direction (hereinafter referred to as “height”) is longer than that of the first plate member 21. ing. In the second plate member 22, a step portion 27 is generated between the substrate portion 26 and the second plate member 22.
As shown in the squeegee 2, in the second plate member 22, the width of the additional plate portion 28 is shorter than the width of the substrate portion 26, so that the first embodiment has a relationship between the first plate member 21 and the second plate member 22. It is possible to easily remove ink paste and dust that have entered between.

The first plate member 21 has a step portion 21a, and the second plate member 22 has a step portion 22a. By aligning the first plate member 21 and the second plate member 22 so that the stepped portions 21a and 22a face each other and fixing them with screws 24, the first plate member 21 and the second plate member 22 are fixed between the first plate member 21 and the second plate member 22. A groove 231 is formed. The squeegee plate 20 is fitted in the groove 231 and fixed to the squeegee plate holder 23. The first plate member 21 and the second plate member 22 are fixed by, for example, screws 24.
The materials of the first plate member 21 and the second plate member 22 are selected based on the relationship between the durability of the ink paste and the durability to withstand repeated use, the solvent used during maintenance, and the like. The first plate member 21 and the second plate member 22 may be any material that satisfies such a requirement, but a metal such as stainless steel is preferable.

The parts for adjusting the deformation amount of the squeegee plate 20 of the first embodiment include a squeegee plate holder 23 that holds the squeegee plate 20, a pressing member that generates a pressing force from the squeegee plate holder 23 toward the squeegee plate 20, and Is included. The pressing member includes a pressing force adjusting unit that adjusts the pressing force applied to the squeegee plate 20. In the first embodiment, for example, the pressing member is a pressing plate piece 29 disposed between the squeegee plate holder 23 and the squeegee plate 20, and the pressing force adjusting unit moves the squeegee plate 20 through the pressing plate piece 29. A set screw 25 to be pressed was used.
As the pressing plate piece 29, for example, a metal piece or the like can be used. By sandwiching the pressing plate piece 29 between the second plate member 22 and the squeegee plate 20 of the squeegee plate holder 23, the side of the squeegee plate 20 facing the second plate member 22 is hardly deformed. In the first embodiment, such a phenomenon is hereinafter also referred to as “apparent hardness is increased”.

  FIG. 8A and FIG. 8B are diagrams for explaining the pressing plate piece 29 and the set screw 25 of the first embodiment. As shown in FIG. 7A, the push plate piece 29 is inserted between the squeegee plate 20 and the second plate member 22. A screw hole 251 is formed in the second plate member 22, and a set screw 25 is screwed to the screw hole 251. By rotating the set screw 25 in the traveling direction, the set screw 25 moves toward the squeegee plate 20, and the pressing force of the pressing plate piece 29 by the set screw 25 increases. In the first embodiment, the advancing direction end of the set screw 25 and the pressing plate piece 29 are in contact with each other, and the pressing plate piece 29 is fixed by being pressed by the set screw 25. FIG. 8A shows a state where the pressing plate piece 29 is in contact with the set screw 25.

By the way, in the above configuration, the set screw 25 is retracted by the drag (squeegee rubber spring back) from the pressing plate piece 29 and the squeegee plate 20, and the pressing force by which the pressing plate piece 29 presses the squeegee plate 20 changes. Conceivable.
FIG. 8B shows a configuration for suppressing a change in pressing force by the pressing plate piece 29. In the configuration illustrated in FIG. 8A, the pressing force adjustment unit of the first embodiment further includes a reverse screw 85 as a stopper for fixing the position of the set screw 25. In the configuration shown in FIG. 8B, a reverse screw 85 having a screw groove direction opposite to the set screw 25 is provided on the side of the set screw 25 opposite to the pressing plate piece 29. A spacer 83 is formed on the side of the reverse screw 85 facing the set screw 25. In such a configuration, the spacer 83 of the reverse screw 85 is in surface contact with the end of the set screw 25. Further, the set screw 25 and the reverse screw 85 may be formed integrally with the reverse screw 85 by reversing the direction of the screw groove during processing of the screw groove of the set screw 25. When the set screw 25 and the reverse screw 85 are processed and formed by such a method, a spacer 83 without a screw groove is formed between the set screw 25 and the reverse screw 85.

  According to such a configuration, when a rotational force in the backward direction is generated in the set screw 25, a rotational force in the traveling direction is applied to the reverse screw 85 even if this rotational force is transmitted to the reverse screw 85. For this reason, the set screw 25 does not move backward even when subjected to the drag of the squeegee plate 20 or the pressing plate piece 29, and the pressing force applied to the squeegee plate 20 does not change.

FIG. 9A, FIG. 9B, and FIG. 9C are schematic views for explaining the deformation of the squeegee plate 20 of the first embodiment. FIG. 9A is a view showing a comparative example of the first embodiment, and shows a squeegee plate holder 73 that does not have a pressing plate piece 29 that functions as a pressing member. The squeegee plate holder 73 is configured with the first plate member 71 and the second plate member 72 facing each other. The first plate member 71 and the squeegee plate holder 73 hold and fix the squeegee plate 20. However, the first plate member 71 and the squeegee plate holder 73 are plate members having the same shape and size.
FIGS. 9B and 9C show the squeegee plate 20 held by the squeegee plate holder 23. FIG. 9C shows a state in which a larger pressing force is applied to the pressing plate piece 29 by moving the set screw 25 in the traveling direction than in the state shown in FIG.

As shown in FIG. 9B, the apparent hardness of the squeegee plate 20 is increased by bringing the pressing plate piece 29 into contact with the squeegee plate 20. For this reason, at the location where the pressing plate piece 29 is sandwiched between the second plate member 22, the pressure applied to the screen printing plate 10 by the squeegee plate 20 during printing (hereinafter referred to as “printing pressure”) is the pressing plate. It becomes higher than the part without the piece 29. Further, when the set screw 25 is advanced in the direction toward the squeegee plate 20 and the pressing force by the pressing plate piece 29 is increased, the apparent hardness of the squeegee plate 20 at this location is further increased.
On the other hand, in the squeegee plate holder 73 shown in FIG. 9A, the portion of the squeegee plate 20 that is not gripped by the squeegee plate holder 73 bends and deforms without being restricted. At this time, the amount of deformation of the squeegee plate 20 is determined by the elasticity and hardness of the squeegee plate 20 and the pressure applied to the squeegee plate 20 while in contact with the screen printing plate 10. In the squeegee shown in FIG. 9A, when a distribution occurs in the printing pressure by the squeegee plate 20 depending on the deformation amount, it cannot be corrected.

On the other hand, as described above, the squeegee 2 of the first embodiment can increase the printing pressure of the squeegee plate 20 by rotating and pushing the set screw 25. On the contrary, the printing pressure of the squeegee plate 20 can be weakened by rotating the set screw 25 and pulling it back. For this reason, in the first embodiment, the distribution of the printing pressure is detected in a state where the squeegee plate 20 is held by the squeegee plate holder 23. Then, the set screw 25 is advanced or retracted according to the detected distribution, and the distribution of the printing pressure of the squeegee plate 20 is adjusted to be uniform. After adjusting the printing pressure of the squeegee plate 20, screen printing is started by the squeegee 2 in the first embodiment.
Note that the adjustment of the printing pressure distribution is performed by, for example, retracting the set screw 25 at a position corresponding to a location where the printing pressure of the squeegee plate 20 is stronger than a predetermined reference printing pressure, so that the printing pressure is higher than the reference printing pressure. You may carry out by advancing the set screw 25 in the position corresponding to the location where pressure is low. Alternatively, it may be performed by advancing the set screw 25 around the portion where the printing pressure of the squeegee plate 20 is higher than the reference printing pressure. On the contrary, you may carry out by retreating the set screw 25 of the periphery of the location where the printing pressure of the squeegee board 20 is lower than the printing pressure used as a reference | standard.

As described above, the first embodiment starts screen printing after adjusting the printing pressure of the squeegee plate 20. That is, in the first embodiment, even if the squeegee plate 20 is not in contact with the screen printing plate 10, the pressing plate piece 29 that is a pressing member presses the squeegee plate 20. Such a first embodiment can measure the printing pressure of the squeegee plate 20 in a state where the squeegee operation is not performed. For this reason, for example, the distribution of the printing pressure of the squeegee can be adjusted with higher accuracy than the adjustment without measuring the printing pressure of the squeegee that is in contact with the printing plate as in Patent Document 3 described above.
In the first embodiment, it is also possible to adjust in a direction to reduce the pressing force against the squeegee plate 20 that is not in contact with the screen printing plate 10.

As described above, the first embodiment is not limited to adjusting the force with which the pressing plate piece 29 presses the squeegee plate 20 using the set screw 25. For example, in the first embodiment, the pressing force is adjusted by increasing or decreasing the number of the pressing plate pieces 29 sandwiched between the second plate member 22 and the squeegee plate 20 without using the set screw 25. May be. Further, the set screw 25 and the pressing plate piece 29 may be integrated so that the pressing force can be adjusted simultaneously with the pressing. Furthermore, the rotation of the set screw 25 when the set screw 25 is moved forward or backward may be manually performed by an operator, or may be performed by a motor or the like (not shown). In the first embodiment in which the set screw 25 is rotated, the amount of rotation of the set screw 25 corresponds to the amount of forward and backward movement with relatively high accuracy. The accuracy can be adjusted.
Moreover, 1st embodiment is not limited to what adjusts the deformation amount of the squeegee board 20 by pressing the squeegee board 20 locally. For example, the squeegee plate 20 may have a multi-layer structure including a plurality of peelable layers, and the squeegee plate 20 may be peeled and thinned at a portion where the printing pressure is strong.

[Adjustment method]
Here, a method for adjusting the printing pressure distribution of the squeegee plate 20 of the first embodiment will be described. In the first embodiment, the printing pressure distribution is detected prior to the adjustment of the printing pressure distribution. Although detection of printing pressure distribution is not specifically limited, For example, it is realizable with the following method.
FIG. 10A and FIG. 10B are diagrams for explaining an example of detection of the printing pressure distribution. FIG. 10A is a schematic enlarged view of the squeegee 2 used for detecting the printing pressure distribution. FIG. 10B shows the pressure-sensitive paper 100 in a state where a predetermined pressure is applied with the squeegee plate 20 of the squeegee 2 shown in FIG. In the pressure sensitive paper 100 shown in FIG. 10, discoloration patterns 101, 102, and 103 corresponding to the magnitude and range of the applied pressure are generated. In FIG. 10, a plurality of set screws 25 arranged in the width direction of the squeegee 2 are shown as set screws 25a to 25f.

In the example shown in FIG. 10, it is assumed that all of the discoloration patterns 101, 102, 103 indicate that the printing pressure of the squeegee plate 20 is higher than the surroundings. In such a case, for example, it is conceivable to increase the printing pressure around the portion of the squeegee plate 20 where the discoloration patterns 101 to 103 are generated, and to make the printing pressure of the entire squeegee plate 20 uniform. In order to increase the printing pressure around the part of the squeegee plate 20 where the discoloration patterns 101 to 103 are generated, it is conceivable to advance the set screw 25 at a position corresponding to the peripheral part. The “set screw at a corresponding position” in the first embodiment may be, for example, a set screw at a position closest to the portion of the squeegee plate 20 that has generated the discoloration pattern. For example, in order to make the distribution of the printing pressure indicated by the discoloration patterns 101 to 103 uniform, the set screws 25a, 25c, and 25d may be advanced to increase the pressing force applied by the pressing plate piece 29 to the squeegee plate 20. .
In the first embodiment, the above process is repeated until the printing pressure of the squeegee plate 20 becomes uniform. In the first embodiment, by adjusting the printing pressure of the squeegee plate 20 via the screen printing plate 10, the printing pressure distribution can be adjusted in consideration of interference by the screen printing plate 10.

In the first embodiment, for example, the set screws 25b, 25e, and 25f may be retracted to reduce the pressing force that the pressing plate piece 29 applies to the squeegee plate 20. Further, at this time, for example, the set screw 25a, 25c, 25d may be moved forward or backward to adjust the distribution of the pressing force.
In the detection of the printing pressure distribution described above, in the first embodiment, the entire upper surface of the squeegee plate 20 may be brought into contact with the pressure-sensitive paper 100, or the squeegee 2 may be fixed to the screen printing plate 10. It is also possible to detect the printing pressure of the contact part 200 by making contact with an angle (for example, about 60 degrees).

[Screen printing device]
FIG. 11 is a diagram for explaining the screen printing apparatus 3 including the squeegee 2 described above. The screen printing apparatus 3 includes a substantially rectangular mounting table 113 on which a screen printing base material w held by a driving mechanism (not shown) is placed on a base pedestal (not shown). Further, the screen printing apparatus 3 is held above the mounting table 113 by a holding member 115 a fixed to the base pedestal, the screen mesh 5 in which the printing mask 7 and the opening portion 8 are formed, and the periphery of the mounting table 113. A plate frame 1 disposed around the plate frame, a reciprocating drive mechanism 118 provided on the plate frame 1 for reciprocating the squeegee 2 made of long plate rubber, and a predetermined printing inclination angle according to the moving direction of the squeegee 2 A tilt changing mechanism (not shown) that changes the tilt angle of the squeegee 2, a vertical movement mechanism (not shown) that lowers and raises the screen mesh 5 within a predetermined range during the movement according to the movement direction, and a movement direction according to the movement direction. A lateral position changing mechanism (not shown) that changes the lateral position of the squeegee 2 and an operating state of these mechanisms are determined, linked to each other, and automatically screen printed. It has a no control unit.

The screen printing apparatus according to the first embodiment is not limited to the screen printing apparatus 3 having the squeegee 2 shown in FIG. 11, and may have the squeegee board holder 23 without the squeegee board 20. Good.
That is, in the squeegee 2, the squeegee plate 20 is a consumable item and can be replaced due to deterioration over time, specifications of the printing mask 7, and the like. For this reason, the screen printing apparatus of the first embodiment may be provided to the user by attaching only the squeegee plate holder 23 without attaching the squeegee plate 20 to the squeegee plate holder 23.

In the first embodiment described above, the squeegee plate holding that adjusts the amount of deformation per unit load applied to the squeegee plate 20 at a plurality of locations in the range where the squeegee plate 20 contacts at least the printing region 9 of the screen printing plate 10. A tool 23 and a pressing plate piece 29 are provided. For this reason, the first embodiment can apply a pressing force to the squeegee plate 20 at a plurality of locations of the squeegee plate 20. Then, by applying a pressing force to the squeegee plate 20, it is possible to suppress deformation of the squeegee plate 20 and increase the apparent hardness. Furthermore, since the first embodiment includes the set screw 25 for each pressing plate piece 29, the pressing force of the pressing plate piece 29 can be adjusted to increase or decrease the apparent hardness of the squeegee plate 20. it can.
Furthermore, since the first embodiment includes a plurality of portions that adjust the apparent hardness of the squeegee plate 20, the apparent hardness of the squeegee plate 20 can be locally increased or reduced.
From the above, the first embodiment is a squeegee, a squeegee plate holder, and a screen printing apparatus that can arbitrarily adjust the contact state with the printing surface in accordance with the flatness of the squeegee end face, the pattern on the printing plate side, and the like. Can be provided.

[Manufacture of printed wiring board]
Here, the process of manufacturing a three-layer flexible printed wiring board using the squeegee 2 described above and the screen printing apparatus 3 provided with the squeegee 2 will be described.
FIGS. 12 (a) to 12 (d), FIGS. 13 (a) to 13 (d) and FIGS. 14 (a) to 14 (e) illustrate the process of manufacturing a three-layer flexible printed wiring board. FIG.
In the above process, first, as shown in FIG. 12A, a single-sided copper-clad laminate 123 is prepared. The single-sided copper-clad laminate 123 is configured by forming a copper foil 122 on one side of an insulating resin 121. For the insulating resin 121, for example, LCP (Liquid Crystal Polymer) having a thickness of 100 μm is used. The thickness of the copper foil 122 is preferably about 12 μm. Moreover, in the said process, as shown in FIG.12 (b), the double-sided copper clad laminated board 126 is prepared. The double-sided copper-clad laminate 126 is configured by forming copper foils 125 on both sides of an insulating resin 124 such as LCP. At this time, the thickness of the LCP is preferably about 100 μm. The thickness of the copper foil 125 is preferably about 12 μm. In the first embodiment, the sheet area of the double-sided copper-clad laminate 126 is 250 mm × 300 mm.

  Next, in the first embodiment, as shown in FIG. 12C, an etching mask (not shown) is formed on the copper foil 122 of the single-sided copper-clad laminate 123 shown in FIG. Then, the copper foil 122 is etched from above the etching mask to produce a copper pattern 122a. The insulating resin 121 provided with the copper pattern 122a becomes the single-sided base material 128. Further, as shown in FIG. 12D, an etching mask (not shown) is formed on the copper foil 125 of the double-sided copper-clad laminate 126 shown in FIG. Then, the copper foil 125 is etched from above the etching mask to produce copper patterns 125a and 125b. The insulating resin 124 provided with the copper patterns 125 a and 125 b becomes the double-sided base material 129. In FIG. 12D, the copper pattern 125a is an outer layer copper pattern, and forms receiving lands and wirings for interlayer conduction holes. The copper pattern 125b becomes an inner layer pattern, and forms receiving lands and wirings for interlayer conduction holes, as well as a conformal mask. Further, the copper patterns 125a and 125b can be subjected to a roughening treatment to increase the adhesion strength between the copper foil and the adhesive.

Furthermore, in 1st embodiment, as shown to Fig.13 (a), the surface in which the copper pattern 122a of the insulating resin 121 of the single-sided base material 128 is not formed is laminated | stacked with the adhesive material 132. FIG. At this time, as the adhesive 132, for example, a low flow bonding sheet having a thickness of 15 μm is used. A protective film 133 such as a PET (polyethylene terephthalate) film is attached on the adhesive 132. The thickness of the protective film 133 is preferably about 20 μm. The first embodiment obtains the single-sided base material 134 by the process shown in FIG.
In the first embodiment, as shown in FIG. 13B, the copper pattern 125a side of the double-sided base material 129 shown in FIG. The protective film 135 is a PET film or the like in which a slightly adhesive material having a thickness of about 10 μm is formed on one side, and the thickness of the protective film 135 is about 20 μm. The first embodiment obtains a double-sided base material 136 by the process of FIG.

  Note that the protective films 133 and 135 define the amount of paste pop-out when the conductive paste is printed in a later step. For this reason, if the protective films 133 and 135 are too thick, they cannot be absorbed by the adhesive thickness after lamination, and the flatness of the substrate is impaired. On the other hand, when the thickness of the protective films 133 and 135 is too thin, sufficient connection reliability may not be obtained. From the above viewpoint, the thickness of the protective films 133 and 135 is preferably in the range of 20 μm ± 5 μm. In addition, when laminating the single-sided base material 128 with the adhesive 132, it is necessary to perform the laminating process at a temperature lower than the thermosetting temperature so that the copper pattern 125b is filled and the necessary adhesiveness remains in the subsequent lamination. is there.

Next, in the first embodiment, as shown in FIG. 13C, the insulating resin 121, the adhesive 132, and the protective film 133 are partially removed to form a bottomed via hole (bottomed conduction hole) 137. To do. The copper pattern 122a is exposed on the bottom surface of the bottomed via hole 137. The diameter of the bottomed via hole 137 is, for example, φ150 μm to 200 μm.
The bottomed via hole 137 can be formed by laser processing, for example. As a laser used for forming the bottomed via hole 137, an infrared laser such as a carbon dioxide gas laser is preferably used from the viewpoint of ease of processing. When a carbon dioxide laser is used, the beam diameter is made approximately equal to the desired hole diameter of the bottomed via hole 137. Further, other lasers such as a UV-YAG laser may be used for forming the bottomed via hole 137. The formed bottomed via hole is preferably subjected to desmear treatment. The single-sided base material 138 can be obtained by the process shown in FIG.

  In the first embodiment, as shown in FIG. 13D, the insulating resin 124, the copper pattern 125a, and the protective film 135 are partially removed to form a bottomed via hole 139. The copper pattern 125 b is exposed on the bottom surface of the bottomed via hole 139. The diameter and processing method of the bottomed via hole 139 are the same as those of the bottomed via hole 137 shown in FIG.

Next, in the first embodiment, as shown in FIG. 14A, the bottomed via hole 137 (FIG. 3C) is filled with the conductive paste 141 using the screen printing device 3 provided with the squeegee 2. . Thereby, the conductive electrode of the wiring is printed at the position of the bottomed via hole 137. Here, in order to avoid air voids from being mixed in the printed conductive paste 141, it is preferable to perform printing in a vacuum printing machine for screen printing. The single-sided base material after the formation of the conductive electrode is referred to as a single-sided base material 142. When printing the conductive electrode, the protective film 133 of the single-sided base material 142 serves as a mask, and the bottomed via hole 137 is selectively filled with the conductive paste 141.
As shown in FIG. 14B, the screen printing apparatus 3 fills the bottomed via hole 139 with a conductive paste 143. Thereby, the conductive electrode of the wiring is printed at the position of the bottomed via hole 139. The double-sided base material after the formation of the conductive electrode is referred to as a double-sided base material 144. When printing the conductive electrodes, the protective film 135 of the double-sided base material 144 serves as a mask, and the bottomed via hole 139 is selectively filled with the conductive paste 143.

Next, in the single-sided base material 142, the protective film 133 is peeled as shown in FIG. By peeling off the protective film 133, the conductive paste 141 is exposed by a thickness substantially equal to the thickness of the protective film 133. The single-sided base material 142 after the protective film 133 is peeled is referred to as a single-sided base material 145. Moreover, as shown in FIG.14 (d), the protective film 135 is peeled in the double-sided base material 144. FIG. By peeling off the protective film 135, the conductive paste 143 is exposed by a thickness substantially equal to the thickness of the protective film 135. The double-sided base material 144 after the protective film 135 is peeled off is referred to as a double-sided base material 146.
Furthermore, in 1st embodiment, as shown in FIG.14 (e), the single-sided base material 145 and the double-sided base material 146 are laminated | stacked. Lamination can be performed by a vacuum press or a vacuum laminator. As for the conditions at the time of lamination, for example, a temperature of 200 ° C. and a pressurizing pressure of about several MPa are suitable. In such lamination, metal bonding and adhesion are performed simultaneously. The single-sided base material 145 and the double-sided base material 146 after lamination are referred to as a wiring board 147.

When the above lamination is performed by a vacuum press, the wiring board 147 is held for about 30 to 60 minutes under the above conditions. During this time, the thermosetting of the binder resin of the adhesive 132 and the conductive pastes 141 and 143 is completed. Further, when the wiring board 147 is manufactured by a vacuum laminator, the vacuum lamination is completed in about several minutes. After the completion of the vacuum lamination, the wiring board 147 is post-cured at about 200 ° C. for about 60 minutes. By such processing, the thermosetting of the binder resin of the adhesive 132 and the conductive pastes 141 and 143 is completed.
According to the above process, the metal particles in the conductive pastes 141 and 143 are metal-bonded to each other, and are also metal-bonded to the copper foils 122 and 125. In the first embodiment, if necessary, a three-layer flexible printed wiring board by conductive paste connection can be obtained by forming a surface treatment, a solder resist, or the like and performing external processing.

In the first embodiment described above, among the three-layer flexible printed wiring boards, the first and third layer wiring patterns (copper pattern 122a, copper pattern 125a and copper pattern 125b) are shown in FIG. It is formed in the step of FIG. However, the first embodiment is not limited to such a configuration, and the copper foils 122 and 125 may be left until the stacking process, and the second layer may be aligned after the stacking. In such a case, a necessary wiring pattern can be formed on the first layer and the third layer by producing a mask using photolithography and using etching. Such a method is effective when there is a large variation in dimensional shrinkage due to lamination.
In the first embodiment, when high accuracy is required for alignment of the first layer and the third layer of the three-layer flexible printed wiring board, it is preferable to prepare an exposure mask using double-sided simultaneous exposure after lamination. . In addition, in 1st embodiment demonstrated above, the process of manufacturing a three-layer flexible printed wiring board was demonstrated. However, in the first embodiment, it is possible to produce a multilayered flexible printed circuit board by stacking a large number of single-sided substrates or double-sided substrates in combination.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
FIG. 15A, FIG. 15B and FIG. 15C are diagrams for explaining the squeegee of the second embodiment of the present invention. FIG. 15A shows the squeegee plate holder 91 of the squeegee 4. FIG. 15B shows the squeegee plate holder 92 of the squeegee 41, and FIG. 15C shows the squeegee plate holder 93 of the squeegee 42.
As shown in FIG. 15A, in the squeegee plate holder 91, a plurality of push plate pieces 29 a and 29 b are arranged in the width direction of the second plate member 221. In some of the plurality of pressing plate pieces, the distance between the other pressing plate pieces and the contact portion is different. That is, in the squeegee plate holder 91, among the plurality of pressing plate pieces, the pressing plate piece 29a whose distance from the contact portion 200 is d1 and the pressing plate piece whose distance from the contact portion 200 is d2. 29b is mixed. By doing in this way, 2nd embodiment can arbitrarily set the location from which the pressing force with respect to the squeegee board 20 differs, and can change a pressing force to the width direction of a squeegee.

The squeegee 4 according to the second embodiment is effective for making the printing pressure applied to the plate uniform when a metal plate is used in screen printing. That is, a metal plate using a metal as a printing mask is thicker than a plate using an emulsion or the like as a mask. In particular, in the case of a metal plate having a thickness of 100 μm or more, the influence of the printing pressure due to the step generated between the metal plate and the base material to be printed cannot be ignored. When the level difference between the metal plate and the substrate is about 100 μm or more, the printing pressure around this becomes non-uniform. The squeegee 4 shown in FIG. 15A is made in consideration of the above points. Then, the pressing plate piece and the set screw 25 near the opening end portion of the metal plate in which a step is formed between the pressing member and the base plate are separated from the contact portion 200 to suppress the influence of the printing pressure by the pressing piece.
Specifically, in the example shown in FIG. 15A, there are open end portions of position metal plates corresponding to both end portions of the squeegee plate 20 of the squeegee 4. For this reason, in the squeegee 4, the pressing plate pieces 29 a having a distance from the abutting portion 200 at both ends of the second plate member 221 are provided. In addition, the edge part of the 2nd board member 221 here points out the area | region which left | separated 1/4 or more of the width | variety of the 2nd board member 221 from the centerline C1 perpendicular | vertical to the width | variety of the 2nd board member 221 here, for example. There may be.

In the second embodiment, as in the squeegee 41 shown in FIG. 15B, the squeegee plate holder 92 includes a first plate member (not shown) that holds the squeegee plate and a second plate member 222. The first plate member or the second plate member may have a notch that goes away from the contact portion 200. In the example shown in FIG. 15B, the push plate piece 29 a and the set screw 25 are moved away from the contact portion 200, and the notch 225 is formed in the second plate member 222 in a direction away from the contact portion 200. .
By doing in this way, in the squeegee 41, the pressed part moves away from the contact part 200 at the end of the second plate member 222, and the pressure by the second plate member 222 is relieved. As a result, the apparent hardness of the squeegee plate 20 held by the squeegee 41 is relaxed at the end of the second plate member 222. The end portion of the second plate member 222 refers to, for example, a region that is separated from the center line C2 perpendicular to the width of the second plate member 222 by ¼ or more of the width of the second plate member 222. Also good.

It is advantageous to make the printing pressure distribution uniform by reducing the thickness of the metal plate due to the step generated at the opening end of the metal plate. However, when the thickness of the metal plate is 50 μm or less, it is known that when an opening of 220 mm × 230 mm is formed in the metal plate, the metal plate cannot withstand the tension of the metal, and problems such as breakage occur. . In order to deal with such a problem, a tension assisting metal may be formed from the opening end to the opposing opening end so as to pass through the center of the opening. The tension assisting metal is, for example, a tape-shaped metal having a width of about 10 mm.
FIG. 15C shows the squeegee 42 in consideration of non-uniform printing pressure caused by the step between the tension assisting metal and the base material. In the squeegee plate holder 93 of the squeegee 42, a notch 224 is formed in a direction away from the contact portion 200 in a region including the center line C <b> 3 perpendicular to the width direction of the second plate member 223. If it does in this way, 2nd embodiment can reduce the pressing force which the center part of the 2nd plate member 223 gives to the squeegee board 20, and can suppress the influence which it has on the printing pressure of the metal for tension assistance.
The inventor of the present invention adjusts the printing pressure when replacing the squeegee plate 20 with the squeegee of the first embodiment and the second embodiment described above, and then replaces the next time (about 3 months depending on the use situation). ) Confirmed that there is no need to adjust until.

[Third embodiment]
Next, a screen printing apparatus according to a third embodiment of the present invention will be described. The screen printing apparatus of the third embodiment includes the screen printing apparatus 3 of the first embodiment and a printing plate that is a metal plate. The metal plate of the third embodiment further includes a printing region where an opening pattern is formed, and a reinforcing member that reinforces the tension of the printing region in the printing region. The metal plate of the third embodiment is used, for example, in the step of filling the bottomed via hole 137 described in the first embodiment with the conductive paste 141 or the step of filling the bottomed via hole 139 with the conductive paste 143. Can do.

16 (a) to 16 (d) are diagrams for explaining a metal plate used in the screen printing apparatus 3, and FIGS. 16 (a) and 16 (b) are diagrams illustrating the conductive plate according to the first embodiment. The metal plate 15 used for filling of the functional pastes 141 and 143 is shown. 16A is a top view of the metal plate 15, and FIG. 16B is a bb cross-sectional view of the metal plate 15 shown in FIG. 16A when viewed in the direction of the arrow bb.
The metal plate 15 includes a metal frame 76 and a metal thin plate 74 supported by the frame 76. A printing region 300 is formed on the thin plate 74, and the printing region 300 overlaps the protective film 133 and the protective film 135. A tension reinforcing member 75 is formed in the printing area 300, and the printing area 300 includes areas 98 and 99 by the tension reinforcing member 75. As a result, two opening patterns 981 and 991 are formed in the printing region 300.

  According to the metal plate 15 described above, the conductive paste 141 can be filled into the bottomed via holes 137 and 139 by applying the conductive paste 141 to the entire surface of the printing region 300 from above the opening patterns 981 and 991. The protective film 133 and the protective film 135 are peeled off after the conductive paste 141 is applied. Through such a process, a plurality of electrodes filled with the conductive paste 141 are formed in the printing region 300.

However, the metal plate of the third embodiment is not limited to that used for filling the via hole. FIGS. 16C and 16D are views for explaining the metal plate 30. FIG. 16C is a top view of the metal plate 30 having the printing region 400, and FIG. (C) It is dd sectional drawing which looked at the metal plate 15 shown in the arrow dd direction. Metal plate 30
A printing plate with a desired pattern formed by cutting a thin metal plate such as stainless steel using a stencil laser or the like. Many of them have conductive ink patterns such as cream solder for mounting electronic components on a substrate. Used to form.
The metal plate 30 includes a metal frame 76 and a metal thin plate 74 supported by the frame 76. A printing area 400 is formed on the thin plate 74, and a plurality of opening patterns 77 are formed in the printing area 400. A tension reinforcing member 80 is formed in the printing region 400, and the printing region 400 includes regions 78 and 79 by the tension reinforcing member 80.

  The tension reinforcing member 75 of the metal plate 15 and the tension reinforcing member 80 of the metal plate 30 are both formed of a thin metal plate integrated with the thin plate 74. By integrating the tension reinforcing members 75, 80 with the thin plate 74, the third embodiment can smooth the front and back of the metal plates 15, 30. Note that, in any of the metal plate 15 and the metal plate 30, the thickness t1 of the thin plate 74 was 50 μm, and the width t2 of the tension reinforcing members 75 and 80 was 10 mm. Further, the length of the print areas 300 and 400 in the x direction is 220 mm, and the length in the y direction is 230 mm.

  In addition, naturally, 3rd embodiment is not limited to such a dimension shape. The thickness t1 can be arbitrarily set within a range of, for example, 50 μm or more and 150 μm or less. The width t2 is determined according to the size of the printing regions 300 and 400 and the thickness t1 of the thin plate 74, but is preferably in a range that does not affect the opening pattern to be formed. Further, the tension reinforcing members 75 and 80 are not limited to those extending in the x direction in the drawings shown in FIGS. 16A and 16C, and may be any members that extend in the moving direction of the squeegee. . Furthermore, the third embodiment is not limited to the one provided with one tension reinforcing member 75, 80, and may include a plurality of each. When a plurality of tension reinforcing members are provided, the plurality of tension reinforcing members may be extended in different directions.

  When the tension reinforcing members 75 and 80 extend in the moving direction of the squeegee, a preferable range of the width t2 is, for example, 1% or more and 5% or less of the minimum width (230 mm in the third embodiment) including the printing region. preferable. In such a configuration, “width” refers to the length in the direction perpendicular to the moving direction of the squeegee. In addition, the “print region” in the third embodiment can be, for example, a region having a minimum area including an opening pattern for forming one print pattern. Here, the pattern to be printed is a pattern of one ink layer formed on a member such as a substrate to be printed. One printed pattern is, for example, a printed pattern formed by moving one unit of a squeegee and applied to one or a plurality of finished products. “One unit” means one time when the squeegee is moved once to form one print pattern, and a plurality of times when the squeegee is moved a plurality of times. A printing area 300 of the metal plate 15 shown in FIG. 16A is a minimum area including the opening patterns 981 and 991. Also, the printing area 400 of the metal plate 30 shown in FIG. 16C is the smallest area that includes the plurality of opening patterns 77.

In the configuration described above, the screen printing apparatus of the third embodiment operates as follows. Note that the screen printing apparatus 3 operates in the same manner regardless of whether the metal plate 15 or the metal plate 30 is used. Therefore, here, the case where the metal plate 15 is used will be described as an example.
The operator sets the metal plate 15 on the screen printing apparatus and puts conductive ink on the side of the thin plate 74 facing the + z axis (hereinafter referred to as “upper surface”). Then, for example, the squeegee 2 of the first embodiment is moved while being in contact with the thin plate 74 on the upper surface of the thin plate 74 of the metal plate 15. By such an operation, the conductive ink is applied to the substrate or the like set below the metal plate 15 through the opening pattern 77 to form an ink pattern.

According to the above operation, tension is applied to the entire metal plate 15 by moving the squeegee 2 while contacting the metal plate 15. Since the printing area 300 is opened, the tension opposite to the pressing force applied by the squeegee 2 is weaker than other parts. If the tension in the printing area 300 is weak, it is conceivable that the metal plate 15 adheres to a substrate such as a substrate after the squeegee 2 has passed, making it difficult to separate the plate and lowering the work efficiency.
In the third embodiment, the tension reinforcing member 80 is provided to reinforce the stress against the tension applied to the printing region 300, and the separation of the metal plate 15 is promoted to prevent the work efficiency from being lowered.

The embodiment described above includes the following technical idea.
(1) A squeegee for applying an ink paste on a substrate, the squeegee plate having a contact portion that moves while contacting the printing plate, and a range of the squeegee plate that contacts at least a printing region of the printing plate. A squeegee including a deformation adjusting unit that adjusts a deformation amount per unit load applied to the squeegee plate.
(2) The squeegee according to (1), wherein the deformation adjusting unit includes a squeegee plate holder that holds the squeegee plate, and a pressing member that generates a pressing force from the squeegee plate holder toward the squeegee plate.
(3) The squeegee according to (2), wherein the pressing member presses the squeegee plate even when the squeegee plate is not in contact with the printing plate.
(4) The pressing member includes a pressing force adjusting unit that adjusts the pressing force applied to the squeegee plate, and the deformation amount per unit load applied to the squeegee plate is adjusted by the pressing force adjusting unit. Squeegee.
(5) The pressing member includes a pressing plate piece disposed between the squeegee plate holder and the squeegee plate, and the pressing force adjusting unit presses the squeegee plate through the pressing plate piece. The squeegee of (4), which is a set screw.
(6) The squeegee according to (5), wherein the pressing force adjustment unit further includes a reverse screw that fixes a position of the set screw.
(7) In the squeegee plate holder, a plurality of the pressing members are arranged in a width direction of the squeegee plate, and a part of the plurality of pressing members has a different distance between the other pressing member and the contact portion. The squeegee according to any one of (2) to (6).
(8) The squeegee plate holder includes a first plate member and a second plate member that grip the squeegee plate, and the first plate member or the second plate member is away from the contact portion. The squeegee according to any one of (2) to (6), having a notch directed to
(9) A squeegee plate holder for holding a squeegee plate for applying an ink paste on a base material via a printing plate, wherein the squeegee is provided at a plurality of locations of the squeegee plate in contact with a printing area of the printing plate. A squeegee plate holder, comprising a deformation adjusting unit for adjusting a deformation amount per unit load applied to the plate.
(10) A screen printing apparatus having the squeegee of any one of (1) to (8).
(11) A screen printing apparatus having the squeegee plate holder according to (9).
(12) The printing plate is provided, and the printing plate is a metal plate, and further includes a printing region in which an opening pattern is formed, and a reinforcing member that reinforces the tension of the printing region in the printing region. The screen printing apparatus according to claim 10 or 11.

DESCRIPTION OF SYMBOLS 1 ... Plate frame 1a ... Opening part 2, 41, 42 ... Squeegee 3 ... Screen printing apparatus 5 ... Screen mesh 7 ... Print mask 8 ... Opening part 9, 300, 400 ... Printing region 10 ... Screen printing plate 15, 30 ... Metal plate 20 ... Squeegee plate 21 ... First plate member 21a, 22a ... Step part 22 ... Second plate Member 23 ... Squeegee plate holder 24 ... Screws 25, 25a to 25f ... Set screw 26 ... Substrate portion 28 ... Additional plate portion 29 ... Press plate piece 71 ... First Plate member 72 ... Second plate member 74 ... Thin plates 75, 80 ... Tension reinforcing member 76 ... Frame bodies 77, 981, 991 ... Opening patterns 78, 79, 98, 99 ... Area 83 ... Spacer 85 ... Reverse screw 100 ... Pressure sensitive paper 101, 10 103 ... Discoloration pattern 113 ... Placement table 115a ... Holding member 118 ... Reciprocating drive mechanism 121 ... Insulating resin 122, 125 ... Copper foil 122a, 125a, 125a ... Copper Pattern 123 ... single-sided copper-clad laminate 124 ... insulating resin 126, 136, ... double-sided copper-clad laminate 128, 134, 138, 142, 145 ... single-sided base materials 129, 144, 146, ... Double-sided substrate 132: adhesive 133, 135 ... protective film 137, 139 ... bottomed via hole 141, 143 ... conductive paste 147 ... wiring board

DESCRIPTION OF SYMBOLS 1 ... Plate frame 1a ... Opening part 2, 41, 42 ... Squeegee 3 ... Screen printing apparatus 5 ... Screen mesh 7 ... Print mask 8 ... Opening part 9, 300, 400 ... Printing region 10 ... Screen printing plate 15, 30 ... Metal plate 20 ... Squeegee plate 21 ... First plate member 21a, 22a ... Step part 22 ... Second plate Member 23 ... Squeegee plate holder 24 ... Screws 25, 25a to 25f ... Set screw 26 ... Substrate portion 28 ... Additional plate portion 29 ... Press plate piece 71 ... First Plate member 72 ... Second plate member 74 ... Thin plates 75, 80 ... Tension reinforcing member 76 ... Frame bodies 77, 981, 991 ... Opening patterns 78, 79, 98, 99 ... Area 83 ... Spacer 85 ... Reverse screw 100 ... Pressure sensitive paper 101, 10 , 103 ... color change pattern 113 ... mount table 115a ... holding member 118 ... reciprocating drive mechanism 121 ... insulating resin 122, 125, ... foil 122a, 125a, 125 b ... Copper pattern 123 ... single-sided copper-clad laminate 124 ... insulating resin 126, 136, ... double-sided copper-clad laminate 128, 134, 138, 142, 145 ... single-sided base materials 129, 144, 146, .... Double-sided base material 132 ... Adhesives 133, 135 ... Protective films 137, 139 ... Bottomed via holes 141, 143 ... Conductive paste 147 ... Wiring board

Claims (12)

A squeegee for applying an ink paste on a substrate,
A squeegee plate having a contact portion that moves while contacting the printing plate;
A deformation adjusting unit that adjusts a deformation amount per unit load applied to the squeegee plate at a plurality of points in a range of the squeegee plate that contacts at least a printing region of the printing plate;
Including squeegee.   The squeegee according to claim 1, wherein the deformation adjusting unit includes a squeegee plate holder that holds the squeegee plate, and a pressing member that generates a pressing force from the squeegee plate holder toward the squeegee plate.   The squeegee according to claim 2, wherein the pressing member presses the squeegee plate even when the squeegee plate is not in contact with the printing plate.   The said pressing member has a pressing force adjustment part which adjusts the pressing force concerning the said squeegee board, and adjusts the deformation amount per unit load concerning the said squeegee board with the said pressing force adjustment part. Squeegee.   The pressing member includes a pressing plate piece disposed between the squeegee plate holder and the squeegee plate, and the pressing force adjusting portion is a set screw that presses the squeegee plate through the pressing plate piece. The squeegee according to claim 4 which is.   The squeegee according to claim 5, wherein the pressing force adjustment unit further includes a reverse screw that fixes a position of the set screw.   In the squeegee plate holder, a plurality of the pressing members are arranged in a width direction of the squeegee plate, and some of the plurality of pressing members have different distances between the other pressing members and the contact portion. Item 7. The squeegee according to any one of Items 2 to 6.   The squeegee plate holder includes a first plate member and a second plate member that hold the squeegee plate, and the first plate member or the second plate member is cut in a direction away from the contact portion. The squeegee according to any one of claims 2 to 6, wherein the squeegee has a notch. A squeegee plate holder for holding a squeegee plate for applying an ink paste on a substrate via a printing plate,
A squeegee plate holder, comprising: a deformation adjusting unit that adjusts a deformation amount per unit load applied to the squeegee plate at a plurality of locations of the squeegee plate that abuts a printing region of the printing plate.   The screen printing apparatus which has a squeegee as described in any one of Claims 1-8.   A screen printing apparatus comprising the squeegee plate holder according to claim 9.   The printing plate is provided, and the printing plate is a metal plate, and further includes a printing region in which an opening pattern is formed, and a reinforcing member that reinforces the tension of the printing region in the printing region. The screen printing apparatus according to 10 or 11.

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