JP2013169741A - Screen printing apparatus, squeegee mechanism, method of manufacturing printed matter, and method of manufacturing substrate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide techniques for a screen printing apparatus or the like, capable of improving print quality.SOLUTION: A screen printing apparatus includes a squeegee and a vibration portion. The squeegee is slid on a screen with a paste-like substance supplied thereon in a sliding direction to print a paste-like substance on a printed matter arranged under the screen via pores provided in the screen. The vibration portion is arranged on the front side of the squeegee in the sliding direction, and applies vibrations to the paste-like substance.

Description

  The present technology relates to a technology such as a screen printing apparatus that prints a paste-like substance on a printing material through a hole provided in a screen.

  DESCRIPTION OF RELATED ART Conventionally, the printing apparatus which prints paste-like substances, such as cream solder and ink with respect to to-be-printed objects, such as a board | substrate, paper, cloth, wood, and a plastic, is widely known.

  In this screen printing apparatus, a squeegee is arranged on the upper side of a screen provided with pattern holes, and a substrate is arranged on the lower side. A paste-like substance is supplied on the screen, and the squeegee is slid on the screen. When the squeegee is slid on the screen, the pasty substance is pushed by the squeegee and moves above the pattern holes provided in the screen. Thereby, a paste-like substance is printed on the to-be-printed material arrange | positioned under the pattern hole.

  When screen printing is performed, simply sliding the squeegee on the screen may cause problems such as insufficient filling of the paste-like substance into the pattern holes and difficulty in removing the paste-like substance from the pattern holes. is there.

  As a technique related to such a problem, a technique described in Patent Document 1 below is known. In this technique, when the squeegee is slid on the screen, the squeegee is vibrated in the vertical direction.

JP 2010-221409 A

  However, in the technique described in Patent Document 1, since the squeegee itself vibrates in the vertical direction, the vertical vibration of the squeegee is transmitted to the screen. As a result, a gap is generated between the lower surface of the screen and the substrate disposed on the lower surface side of the screen. When the gap is generated, the paste-like substance enters the gap due to the capillary phenomenon, so that the printing is blurred. As a result, there is a problem that the print quality is degraded.

  In view of the circumstances as described above, an object of the present technology is to provide a technology such as a screen printing apparatus that can improve the printing quality.

The screen printing apparatus according to the present technology includes a squeegee and a vibration unit.
The squeegee is slid in a sliding direction on a screen to which a paste-like substance is supplied, and the paste is placed on a printed material disposed below the screen through a hole provided in the screen. Print the material.
The vibration part is disposed on the front side in the sliding direction of the squeegee and applies vibration to the paste-like substance.

  In this screen printing apparatus, vibration is applied to the paste-like substance by the vibration unit. In this way, by applying vibration to the paste-like substance, it is possible to improve the filling property of the paste-like substance with respect to the holes provided in the screen and the detachability of the paste-like substance with respect to the holes. Further, in the present technology, the vibration unit is disposed on the front side in the sliding direction of the squeegee, and the squeegee itself is not configured to vibrate. Therefore, there is no gap between the lower surface of the screen and the printed material placed on the lower surface side of the screen due to the vibration of the squeegee, and the paste-like substance does not enter the gap. Therefore, according to the present technology, print quality can be improved.

  In the screen printing apparatus, the vibration unit causes the first vibration to roll while applying vibration to the pasty substance on the front side in the sliding direction of the squeegee when the squeegee is slid on the screen. You may have a board.

  In this screen printing apparatus, the first vibrating plate can be rolled while appropriately vibrating the pasty substance.

  In the screen printing apparatus, the vibration unit is disposed on the front side in the sliding direction with respect to the first vibration plate, and includes a second vibration plate that vibrates and stirs the rolled pasty substance. Furthermore, you may have.

  In this screen apparatus, since the rolled paste-like substance can be vibrated and stirred by the second diaphragm, the filling property of the paste-like substance in the holes provided in the screen and the paste-like substance in the holes can be stirred. The slipping property can be further improved.

In the screen printing apparatus,
The second diaphragm may be in contact with an obtuse angle with respect to a paste-like substance in which a tip portion of the second diaphragm is rolled.

  As a result, the rolled paste-like substance is scraped by the tip of the second diaphragm, so that the diameter of the rolled paste-like substance is stabilized.

In the screen printing apparatus,
The second diaphragm may be in contact with an acute angle with respect to a paste-like substance in which a tip portion of the second diaphragm is rolled.

  Thereby, deformation of the rolled paste-like substance can be promoted.

The screen device may further include a guide unit.
The guide portions are arranged at both ends in the width direction of the squeegee, which is a direction perpendicular to the sliding direction, and vibrate the pasty substance while supporting the rolled pasty substance from the side. .

  In this screen device, the guide portion can prevent the pasty substance from leaking from both ends in the width direction of the squeegee. Furthermore, since this guide part vibrates, the rolling resistance which a guide part gives with respect to the rolled paste-like substance can be reduced.

  The screen printing apparatus may further include a vibration insulating unit that performs vibration isolation between the squeegee and the vibration unit.

  Thereby, it can prevent that a squeegee vibrates by vibration of a vibration part.

The screen printing apparatus according to claim 1, wherein the vibration unit may include a vibration generation source and a storage area.
The vibration generation source generates vibration in the vibration unit.
The storage area stores the vibration generation source therein so that the paste-like substance does not adhere to the vibration generation source.

  Thereby, it can prevent that a paste-form substance adheres with respect to a vibration generation source.

  In the screen printing apparatus, the vibration unit may be subjected to low friction processing or low adhesion processing on the paste-like substance.

  Thereby, it can prevent that a paste-form substance adheres with respect to a vibration part.

The screen printing apparatus may further include a moving mechanism that moves the squeegee and the vibration unit in a vertical direction.
In this case, the vibration unit may be vibrated at a timing when the squeegee is moved upward and the squeegee is separated from the screen.

  Thereby, it can prevent that a paste-form substance adheres with respect to a vibration part.

The squeegee mechanism according to the present technology includes a squeegee and a vibration unit.
The squeegee is slid in the sliding direction on the screen to which the paste-like substance is supplied, and the paste-like material is placed on the substrate to be printed on the lower side of the screen through a hole provided in the screen. Print the substance.
The vibration part is disposed on the front side in the sliding direction of the squeegee and applies vibration to the paste-like substance.

The manufacturing method of the printed matter which concerns on this technique includes supplying a paste-form substance on a screen.
A squeegee that is slid in the sliding direction on the screen, and a vibration portion that is disposed on the front side in the sliding direction of the squeegee and that vibrates the pasty substance moves in the sliding direction. Is done.
The pasty substance is printed by the squeegee on a substrate to be printed disposed on the lower side of the screen through a hole provided in the screen.

In the method for manufacturing a substrate according to the present technology, cream solder is supplied on a screen.
A squeegee that is slid in the sliding direction on the screen, and a vibration part that is disposed on the front side in the sliding direction of the squeegee and that vibrates the cream solder is moved in the sliding direction. The
The cream solder is printed by the squeegee on a substrate disposed on the lower side of the screen through a hole provided in the screen.
An electronic component is mounted on the substrate on which the cream solder is printed.

  As described above, according to the present technology, it is possible to provide a technology such as a screen printing apparatus that can improve the printing quality.

It is a front view showing a screen printer concerning a 1st embodiment of this art. It is a side view which shows a screen printing apparatus. It is a top view which shows the screen which a screen printing apparatus has. It is a block diagram which shows a screen printing apparatus. It is a perspective view which shows a squeegee mechanism. It is a side view which shows a squeegee mechanism. It is a side view which shows a mode when cream solder is printed on a board | substrate by a squeegee mechanism. It is a side enlarged view which shows a mode when cream solder is printed on a board | substrate by a squeegee mechanism. It is a perspective view which shows the squeegee mechanism which concerns on 2nd Embodiment of this technique. It is a top view which shows a squeegee mechanism. It is a figure which shows the angle which the front-end | tip part of a 2nd diaphragm contact | connects solder rolling.

Hereinafter, embodiments according to the present technology will be described with reference to the drawings.
<First Embodiment>
[Overall Configuration of Screen Printing Apparatus 100 and Configuration of Each Unit]
FIG. 1 is a front view showing a screen printing apparatus 100 according to the first embodiment of the present technology, and FIG. 2 is a side view showing the screen printing apparatus 100. FIG. 3 is a top view showing the screen 3 included in the screen printing apparatus 100, and FIG. 4 is a block diagram showing the screen printing apparatus 100.

  A screen printing apparatus 100 shown in these drawings is a screen printing apparatus 100 that prints cream solder 2 (a paste-like substance) on a substrate 1 (a printed material). On the upstream side of the screen printing apparatus 100, for example, a substrate loading apparatus (not shown) for loading the substrate 1 into the screen printing apparatus 100 is disposed. On the other hand, on the downstream side of the screen printing apparatus 100, a printing inspection apparatus (not shown) that receives the substrate 1 (printed material) on which the cream solder 2 is printed from the screen printing apparatus 100 and inspects the printing state of the cream solder 2. Is placed. Further, on the downstream side of the printing inspection apparatus, a mounting apparatus that receives the substrate 1 determined to be in a good printing state from the printing inspection apparatus and mounts electronic components on the substrate 1 on which the cream solder 2 is printed. Is placed.

  1 to 3, the screen printing apparatus 100 includes a screen 3, a fixing unit 6 that fixes the screen 3 to a predetermined position of the screen printing apparatus 100, and a squeegee unit 10 disposed above the screen 3. I have. The screen printing apparatus 100 includes a positioning unit 20, an imaging unit 30, and a cleaning unit 40 that are disposed below the screen 3. Further, the screen printing apparatus 100 includes a support base 50 that movably supports the squeegee unit 10, the imaging unit 30, and the cleaning unit 40 on the back side of the screen printing apparatus 100.

  Referring to FIG. 4, the screen printing apparatus 100 includes a control unit 60, a storage unit 61, a display unit 62, and an input unit 63 in addition to the squeegee unit 10, the positioning unit 20, the imaging unit 30, the cleaning unit 40, and the like. And a communication unit 64.

  The screen 3 has a rectangular flat plate shape in plan view, and has a plurality of pattern holes 4 corresponding to the print pattern in the vicinity of the center (see FIG. 3). The screen 3 is made of a metal such as stainless steel, and the screen 3 is provided with a frame 5 that applies tension to the screen 3 along the four sides of the screen 3.

  The fixing unit 6 that fixes the screen 3 includes an attachment frame 7 and four screen clamps 8 that are provided on the attachment frame 7 and sandwich and fix the frame body 5 of the screen 3 from above and below. The mounting frame 7 is supported by a support base 50, a support body (not shown), and the like.

  A pair of guide rails 51 and 52 are provided on the upper side of the support base 50 along the Y-axis direction. A pair of guide rails 53 and 54 are provided on the lower side of the support base 50 along the Y-axis direction.

  A carriage 55 that supports the squeegee unit 10 is movably attached to the guide rails 51 and 52. The carriage 55 and the squeegee unit 10 supported by the carriage 55 are moved along the Y-axis direction with respect to the support base 50 by driving of a driving mechanism including, for example, a ball screw and a motor.

  The squeegee unit 10 includes a first squeegee mechanism 11 and a second squeegee mechanism 12 arranged symmetrically with the first squeegee mechanism 11. The first squeegee mechanism 11 and the second squeegee mechanism 12 each include a squeegee 13, a vibration unit 70, a squeegee holding member 14, a connection bracket 15, and a support member 17.

  The squeegee 13 is slid in the sliding direction on the screen 3 to which the cream solder 2 (see FIG. 7) is supplied, and is arranged on the lower side of the screen 3 through the pattern holes 4 provided in the screen 3. The cream solder 2 is printed on the printed board 1. The vibration unit 70 is disposed on the front side in the sliding direction of the squeegee 13 and applies vibration to the cream solder 2. The configurations of the squeegee 13 and the vibration unit 70 will be described in detail later with reference to FIGS. 5 and 6.

  The squeegee 13 and the vibration unit 70 are held by the squeegee holding member 14. The squeegee holding member 14 is attached to the support member 17 via a connecting bracket 15. The connecting bracket 15 and the support member 17 are screwed together by screwing with screws 16. The support member 17 is attached to the movable part of the air cylinder 18. The air cylinder 18 (movement mechanism) moves the support member 17, the connecting bracket 15, the squeegee holding member 14, the squeegee 13, and the vibration unit 70 integrally in the vertical direction by driving the movable portion.

  When one squeegee mechanism (11 or 12) is slid on the screen 3 to print the solder 2 on the substrate 1, the other squeegee mechanism (12 or 11) is positioned above the screen. 3 is not in contact (see FIG. 7). The squeegee mechanisms 11 and 12 slid on the screen 3 are switched alternately.

  The positioning unit 20 positions the substrate 1 to be screen printed with respect to the screen 3. The positioning unit 20 includes a conveyor for transporting the substrate 1, a suction stage for sucking and holding the substrate 1, a lifting mechanism for moving the suction stage up and down, a table mechanism for moving the suction stage in the X-axis, Y-axis, and θ-axis directions ( Neither is shown).

  A carriage 56 that supports the imaging unit 30 and a carriage 57 that supports the cleaning unit 40 are attached to guide rails 53 and 54 provided on the lower side of the support base 50 so as to be movable in the Y-axis direction.

  The carriage 56 and the imaging unit 30 supported by the carriage 56 are moved along the Y-axis direction with respect to the support base 50 by driving of a driving mechanism such as a ball screw and a motor. The imaging unit 30 is attached to the carriage 56 so as to be movable in the X-axis direction, and is moved along the X-axis direction with respect to the carriage 56 by driving of a driving mechanism such as a ball screw and a motor. Thereby, the imaging unit 30 can be moved along the Y-axis direction and the X-axis direction.

  The imaging unit 30 includes a first imaging unit 31 that is arranged downward and a second imaging unit 32 that is arranged upward. The first imaging unit 31 arranged toward the lower side images the alignment mark provided on the substrate 1. The second imaging unit 32 arranged toward the upper side images the alignment mark provided on the lower surface side of the screen 3. Based on the image of the alignment mark imaged by the first imaging unit 31 and the second imaging unit 32, the screen 3 and the substrate 1 are aligned.

  The first imaging unit 31 and the second imaging unit 32 are respectively an imaging element such as a CCD sensor (CCD: Charge Coupled Device) or a CMOS sensor (CMOS: Complementary Metal Oxide Semiconductor), and an optical element such as an imaging lens. Including the system.

  The carriage 57 and the cleaning unit 40 supported by the carriage 57 are moved along the Y-axis direction with respect to the support base 50 by driving of a driving mechanism such as a ball screw and a motor. The cleaning unit 40 includes a roller 41, a delivery roller 42 that sends out the cleaning tape, and a take-up roller 43 that takes up the cleaning tape.

  When the cleaning unit 40 is moved along the Y-axis direction, the roller 41, the delivery roller 42, and the take-up roller 43 are rotated in conjunction therewith. The cleaning tape delivered from the delivery roller 42 rotates around the roller 41 while contacting the lower surface of the screen 3 and is taken up by the take-up roller 43. Thereby, the lower surface of the screen 3 is cleaned.

  The control unit 60 is configured by, for example, a CPU (Central Processing Unit) or the like, and comprehensively controls each unit of the screen printing apparatus 100. The storage unit 61 includes a non-volatile memory used as a work area for the control unit 60 and a non-volatile memory in which various programs necessary for the processing of the control unit 60 are stored. The various programs may be read from a portable recording medium such as an optical disk or a semiconductor memory.

  The display unit 62 is configured by, for example, a liquid crystal display. The input unit 63 includes a keyboard, a touch panel, and the like, and inputs instructions from the operator. The communication unit 64 transmits information to other apparatuses such as a print inspection apparatus and a mounting apparatus, and receives information from other apparatuses.

  FIG. 5 is a perspective view showing the squeegee mechanism, and FIG. 6 is a side view showing the squeegee mechanism.

  As shown in these drawings, the squeegee 13 has a rectangular flat plate shape that is long in one direction (X-axis direction). The squeegee 13 is typically made of a metal such as stainless steel, but the material of the squeegee 13 is not particularly limited. The squeegee 13 is provided to be inclined at a predetermined angle with respect to the horizontal plane (XY plane), so that the squeegee 13 contacts with the screen 3 at a predetermined angle at the tip. The squeegee 13 is sandwiched between the squeegee holding member 14 and the squeegee fixing member 73, and the squeegee fixing member 73 is fixed to the squeegee holding member 14 by the fastening member 75, so that the squeegee holding member 14 is strong. Fixed to.

  In the vicinity of the tip portion of the squeegee 13, a groove 13a is formed along the width direction (X-axis direction) on the rear surface in the sliding direction. Since the groove 13a can improve the flexibility of the squeegee 13, the adhesion between the squeegee 13 and the screen 3 can be improved.

  The surface of the squeegee 13 may be subjected to low friction processing or low adhesion processing on the cream solder 2. Examples of the low friction processing include fluorine resin coating processing, and examples of the low adhesion processing include polka dot uneven processing. Both the fluororesin coating and the polka dot unevenness processing may be applied to the surface of the squeegee 13.

  The vibration unit 70 is disposed on the front side in the sliding direction of the squeegee 13, and when the squeegee 13 is slid on the screen 3 in the sliding direction, the cream portion 70 is on the front side in the sliding direction of the squeegee 13. A first diaphragm 71a is provided that rolls while applying vibration to the solder 2. Moreover, the vibration part 70 is arrange | positioned ahead of the sliding direction rather than the 1st diaphragm 71a, and has the 2nd diaphragm 71b which gives the vibration to the rolled cream solder 2 and stirs it. The vibration unit 70 includes a first piezoelectric element unit 72a (vibration generation source) for generating vibrations in the first vibration plate 71a and a second unit for generating vibrations in the second vibration plate 71b. And a piezoelectric element portion 72b (vibration generation source).

  The first diaphragm 71a has a rectangular flat plate shape that is long in one direction (X-axis direction). The first vibrating portion 70 is formed such that a position slightly above the center in the vertical direction is bent along the X-axis direction. By forming the first diaphragm 71a so as to be bent along the X-axis direction, a first piezoelectric element portion 72a is housed between the squeegee 13 and the first diaphragm 71a. Storage area 74a can be formed. In the following, in the first diaphragm 71a, the lower part of the bent portion is referred to as a diaphragm main body, and the upper part is referred to as an attachment part.

  The diaphragm main body is provided to be inclined at a predetermined angle with respect to a horizontal plane (XY plane). The angle at which the diaphragm main body is inclined with respect to the horizontal plane is more acute than the angle at which the squeegee 13 is inclined with respect to the horizontal plane because the first diaphragm 71a is bent. The angle at which the first diaphragm 71a is inclined with respect to the horizontal plane may be the same as the angle at which the squeegee 13 is inclined with respect to the horizontal plane.

  As the material of the first diaphragm 71a, for example, stainless steel such as SUS303 or SUS304 (JIS: Japanese Industrial Standards), or resin such as PET (PolyEthylene Terephthalate) is used. In addition, the material of the 1st diaphragm 71a is not restricted to these, Another metal and resin may be used. The same applies to the second diaphragm 71b.

  Even if the first diaphragm 71a is subjected to low friction processing or low adhesion processing (or a combination thereof) similar to the squeegee 13 on the front surface in the sliding direction (at least the front surface of the diaphragm main body). Good.

  The distal end portion of the first diaphragm 71 a is located above the distal end portion of the squeegee 13, and the distal end portion of the first diaphragm 71 a does not contact the screen 3. A first vibration insulating material 81a is interposed between the distal end portion of the first diaphragm 71a and the distal end portion of the squeegee 13. The first vibration insulating material 81 a can prevent the vibration of the first diaphragm 71 a from being transmitted to the squeegee 13.

  Further, the first vibration insulating material 81a has a function as a packing material for preventing the cream solder 2 from entering the first storage region 74a in addition to the function as a vibration insulating material. doing. As a material of the first vibration insulating material 81a for providing the above two functions, for example, α-gel (registered trademark) such as an NPGEL sheet and a gel tape GT5 (both manufactured by Taika) is used.

  The upper part (attachment part) of the first diaphragm 71 a is fixed to the squeegee fixing member 73 and the squeegee holding member 14 by the fastening member 75. A second vibration insulating material 81b is interposed between the first diaphragm 71a and the fastening member 75, and between the first diaphragm 71a and a mounting portion 76a (described later) of the support plate 76. The third vibration insulating material 81c is interposed. The second vibration insulating material 81 b can prevent the vibration of the first diaphragm 71 a from being transmitted to the squeegee 13 via the fastening member 75. The third vibration insulating material 81 c can prevent the vibration of the first diaphragm 71 a from being transmitted to the squeegee 13 via the squeegee fixing member 73.

  For example, silicon rubber is used as the material of the second vibration insulating material 81b and the third vibration insulating material 81c. Note that an α gel (registered trademark) such as an NPGEL sheet or a gel tape GT5 (both manufactured by Taika) may be used in the same manner as the first vibration insulating material 81a. The same applies to the fourth vibration insulating material 81d described later.

  The first piezoelectric element portion 72a is attached to the rear surface of the first diaphragm 71a (the diaphragm main body) inside the first storage region 74a. The first piezoelectric element portion 72a includes a plurality of piezoelectric elements arranged at predetermined intervals along the width direction (X-axis direction). The first piezoelectric element unit 72 a is electrically connected to the control unit 60 and vibrates at a predetermined frequency according to the control of the control unit 60.

  In the present embodiment, the first piezoelectric element portion 72a is housed in the first housing region 74a, and the first vibration insulating material 81a also functions as a packing material, and therefore the first piezoelectric element portion 72a. On the other hand, it is possible to prevent the cream solder 2 from adhering. In the example shown in FIGS. 5 and 6, the side portions on both sides in the width direction (X-axis direction) of the first storage region 74a are open, but the first storage region 74a may be a closed region. it can. In this case, a wall part is provided in the position of the side part of the both sides of the 1st storage area 74a.

  The second diaphragm 71b is supported by a support plate 76 that supports the second diaphragm 71b. The support plate 76 includes an attaching portion 76a attached to the squeegee fixing member 73 (squeegee holding member 14) by the fastening member 75, an extending portion 76b provided to be inclined obliquely downward on the front side, and obliquely downward on the rear side. And a support portion 76c provided to be inclined. The support plate 76 is typically made of a material such as metal or resin, but is not limited to this, and other materials may be used.

  The support portion 76c of the support plate 76 is formed such that portions other than the upper end portion and the lower end portion protrude obliquely downward in the forward direction. A second diaphragm 71b is attached to the rear side of the support portion 76c. A second storage region 74b for storing the second piezoelectric element portion 72b is formed between the protruding portion of the support portion 76c and the second diaphragm 71b.

  The second diaphragm 71b has a rectangular flat plate shape that is long in one direction (X-axis direction). The second diaphragm 71b is provided at a predetermined angle with respect to the horizontal plane. In the example shown in the figure, the angle at which the second diaphragm 71b is inclined with respect to the horizontal plane is the same as that of the first diaphragm 71a (the diaphragm main body), but the angle of the second diaphragm 71b. May be different from the angle of the first diaphragm 71a.

  The distal end portion of the second diaphragm 71b protrudes from the lower end portion of the support portion 76c. The tip of the second diaphragm 71b is disposed at a position in contact with the cream solder 2a rolled by the first diaphragm 71a (see the one-dot chain line in FIG. 6). Hereinafter, the cream solder 2 rolled by the first diaphragm 71a is referred to as solder rolling 2a.

  The second diaphragm 71b may be subjected to low friction processing or low adhesion processing (or a combination thereof) on the rear surface in the sliding direction (the front end portion is also on the front surface).

  The second piezoelectric element portion 72b is attached to the front side of the second diaphragm 71b inside the second storage region 74b. The second piezoelectric element portion 72b includes a plurality of piezoelectric elements arranged at predetermined intervals along the width direction (X-axis direction). The second piezoelectric element unit 72 b is electrically connected to the control unit 60 and vibrates at a predetermined frequency according to the control of the control unit 60.

  A fourth vibration insulating material 81d is interposed between the second diaphragm 71b and the upper end portion of the support portion 76c, and between the second diaphragm 71b and the lower end portion of the support portion 76c. The fourth vibration insulating material 81d can prevent the vibration of the second vibration plate 71b from being transmitted to the support plate 76. Therefore, it is possible to prevent the vibration of the second diaphragm 71b from being transmitted to the squeegee 13. Since the third vibration insulating material 81c is interposed between the mounting portion 76a of the support plate 76 and the first vibration plate 71a as described above, the vibration of the second vibration plate 71b, It does not interfere with the vibration of the first diaphragm 71a.

  In order to prevent the vibration of the second diaphragm 71 b from being transmitted to the squeegee fixing member 73 side through the support plate 76, vibration is generated between the mounting portion 76 a of the support plate 76 and the squeegee fixing member 73. An insulating material may be interposed.

  Here, the frequency and amplitude at which the first diaphragm 71a and the second diaphragm 71b vibrate will be described.

  First, the frequency will be described. As described above, in the first diaphragm 71a, the transmission of vibration to the squeegee 13 is prevented by the first vibration insulating material 81a to the third vibration insulating material 81c. Similarly, in the second diaphragm 71b, transmission of vibration to the support plate 76 is prevented by the fourth vibration insulating material 81d. Silicon rubber (α-gel (registered trademark)) is used as the material of the vibration insulating material 81, and the natural frequency of the silicon rubber is about 35 Hz at the maximum.

  In order to prevent resonance between the vibration plate 71 and the vibration insulating material 81, it is necessary to vibrate the vibration plate 71 at a frequency that is √2 times or more the natural frequency of the first vibration insulating material 81. . Therefore, the diaphragm 71 is typically vibrated at a frequency of 50 Hz (≈35 × √2) or more.

  The amplitude of the diaphragm 71 will be described. The cream solder 2 is composed of solder particles and flux. In order to promote the liquefaction of the cream solder 2 by the vibration plate 71, it is necessary to apply a certain force to the flux between the solder particles. For example, the liquefaction of the cream solder 2 can be promoted by vibrating the first diaphragm 71a with an amplitude larger than the particle size of the solder particles contained in the cream solder 2. For example, when the particle diameter of the solder particles is 20 μm, the vibration plate 71 is vibrated with an amplitude of 20 μm or more. The frequency and amplitude of the first diaphragm 71a and the frequency and amplitude of the second diaphragm 71b may be the same or different.

[Description of operation]
Next, the operation of the screen printing apparatus 100 will be described.
FIG. 7 is a side view showing a state when the cream solder 2 is printed on the substrate 1 by the squeegee mechanism. FIG. 8 is an enlarged side view showing a state when the cream solder 2 is printed on the substrate 1 by the squeegee mechanism.

  First, the substrate 1 is brought into contact with the lower side of the screen 3 by the positioning unit 20. Next, the air cylinder 18 is driven, and the first squeegee mechanism 11 is moved downward (see the broken line in FIG. 7A). When the first squeegee mechanism 11 is moved downward, the tip of the squeegee 13 is brought into contact with the screen 3 with a predetermined pressure. On the screen 3, cream solder 2 is supplied by a solder supply unit (not shown).

  Next, the movement of the first squeegee mechanism 11 is started in the sliding direction (see the solid line in FIG. 7A). At the timing when the movement of the first squeegee mechanism 11 is started, a voltage is applied to the first piezoelectric element portion and the second piezoelectric element portion 72b, and the first diaphragm 71a and the second piezoelectric element portion 72b of the first squeegee mechanism 11 are applied. The vibration of the second diaphragm 71b is started.

  When the first squeegee mechanism 11 is moved in the sliding direction, the squeegee 13 is slid on the screen 3. At this time, the first diaphragm 71 a is rolled while applying vibration to the cream solder 2 on the front side in the sliding direction of the squeegee 13. The surface of the rolled cream solder 2 (solder rolling 2a) is liquefied by the first diaphragm 71a, whereby a liquefied layer is formed on the surface of the solder rolling 2a.

  Since the first diaphragm 71a vibrates at an appropriate frequency (for example, 50 Hz or more) and amplitude (for example, 20 μm or more), the vibration of the first diaphragm 71a is transmitted to the squeegee 13. The liquefied layer can be appropriately formed while preventing the liquefaction.

  Furthermore, the solder rolling 2a is agitated to a deep region inside by the tip of the vibrating second diaphragm 71b. Thereby, the liquefied layer on the surface of the solder rolling 2a can be further thickened. Since the second diaphragm 71b vibrates at an appropriate frequency (for example, 50 Hz or more) and amplitude (for example, 20 μm or more), the vibration of the second diaphragm 71b is transmitted to the squeegee 13. The solder rolling 2a can be appropriately stirred while preventing.

  A part of the liquefied layer formed on the surface of the solder rolling 2a is scraped off by the tip of the second diaphragm 71b. As a result, a pooled portion of the liquefied cream solder 2 is formed near the tip of the second diaphragm 71b. Thus, since a part of liquefaction layer is scraped off by the front-end | tip part of the 2nd diaphragm 71b, the rolling diameter of the solder rolling 2a can be made constant.

  The liquefied cream solder 2 enters an area between the solder rolling 2a and the front surface of the squeegee 13 and the front surface of the first diaphragm 71a. The liquefied cream solder 2 is filled into the pattern holes 4 provided in the screen 3 by a squeegee 13 that slides on the screen 3, whereby the substrate 1 disposed below the screen 3. Cream solder 2 is printed on top. In the present embodiment, the pattern solder 4 can be filled with the cream solder 2 having an appropriate softness that has been appropriately liquefied, so that the filling property of the cream solder 2 into the pattern hole 4 can be improved.

  When the cream solder 2 is filled in the pattern holes 4, the substrate 1 is moved downward by the positioning portion 20, and the substrate 1 is separated from the lower surface of the screen 3. As the substrate 1 is moved downward, the cream solder 2 filled in the pattern hole 4 comes out of the pattern hole 4. In the present embodiment, since the cream solder 2 having an appropriate softness is filled in the pattern holes 4, it is possible to improve the detachability when the cream solder 2 comes out of the pattern holes 4.

  The substrate 1 on which the cream solder 2 is printed is conveyed by the positioning unit 20 and delivered to the print inspection apparatus. When the positioning unit 20 delivers the substrate 1 on which the cream solder 2 is printed, the positioning unit 20 newly conveys the substrate 1 before printing and brings it into contact with the lower surface of the screen 3.

  When the first squeegee mechanism 11 reaches the vicinity of the end of the screen 3, the movement of the first squeegee 13 in the sliding direction is stopped. Next, the first squeegee mechanism 11 is moved upward by the air cylinder 18, and the second squeegee mechanism 12 is moved downward by the air cylinder 18 (see the broken line in FIG. 7B).

  The diaphragm 71 may be vibrated at the timing when the first squeegee mechanism 11 is moved upward and the squeegee 13 is separated from the screen 3. Thereby, it is possible to prevent the cream solder 2 from adhering to the vibration plate 71. Thereby, it is possible to prevent the cream solder 2 attached to the vibration plate 71 from being dried or causing a chemical change to adversely affect the quality of the cream solder 2. Further, the first squeegee mechanism 11 may be moved upward at an acceleration at which the cream solder 2 slides from the diaphragm 71.

  The vibration of the diaphragm 71 of the first squeegee mechanism 11 is stopped after a predetermined time has elapsed after the first squeegee mechanism 11 is moved upward.

  When the second squeegee mechanism 12 is moved downward and the squeegee 13 of the second squeegee mechanism 12 comes into contact with the substrate 1, the movement of the second squeegee mechanism 12 is then performed in the moving sliding direction. The process is started (see the solid line in FIG. 7B). At the timing when the movement of the second squeegee mechanism 12 is started, a voltage is applied to the first piezoelectric element portion 72a and the second piezoelectric element portion 72b, and the first diaphragm 71a of the second squeegee mechanism 12 and The vibration of the second diaphragm 71b is started.

  Then, the cream solder 2 is printed on the substrate 1 by the second squeegee mechanism 12. The printing by the second squeegee mechanism 12 is the same except that the direction is different from the printing by the first squeegee mechanism 11. Thereafter, printing by the first squeegee mechanism 11 and printing by the second squeegee mechanism 12 are alternately repeated.

[Action etc.]
As described above, in the screen printing apparatus 100 according to the present technology, the liquefied layer can be formed on the surface of the solder rolling 2a by the vibrating first vibration plate 71a. The liquefied moderately soft cream solder 2 is filled into the pattern holes 4 of the screen 3 by the squeegee 13. Therefore, the filling property of the cream solder 2 to the pattern holes 4 provided in the screen 3 and the detachability of the cream solder 2 to the pattern holes 4 can be improved.

  In addition, since the solder rolling 2a can be stirred to a deep region inside by the vibrating second vibration plate 71b, the liquefied layer on the surface of the solder rolling 2a can be further thickened. Therefore, the filling property of the cream solder 2 to the pattern holes 4 provided in the screen 3 and the detachability of the cream solder 2 to the pattern holes 4 can be further improved.

  In the present embodiment, the first diaphragm 71a and the second diaphragm 71b are disposed on the front side in the sliding direction of the squeegee 13, and the squeegee 13 itself is not configured to vibrate. Therefore, there is no gap between the lower surface of the screen 3 and the substrate 1 arranged on the lower surface side of the screen 3 due to the vibration of the squeegee 13, and the cream solder 2 does not enter the gap. Therefore, according to the present technology, print quality can be improved.

  In the present embodiment, the vibration insulating material 81 (vibration insulating portion) prevents the vibration of the diaphragm 71 from being transmitted to the squeegee 13, so that the squeegee 13 does not vibrate.

  Moreover, in this embodiment, since a part of liquefied layer is scraped off by the front-end | tip part of the 2nd diaphragm 71b, the rolling diameter of the solder rolling 2a can be made constant. Thus, by making the rolling diameter of the solder rolling 2a constant, the filling quality of the cream solder 2 in the pattern holes 4 (the thickness of the cream solder 2 does not vary for each pattern hole 4) is improved. Can do. The filling quality of the cream solder 2 can be improved by making the rolling diameter of the solder rolling 2a and the moving speed of the squeegee 13 constant. In the present embodiment, the rolling diameter of the solder rolling 2a is automatically fixed by the second diaphragm 71b, so that it is not necessary to manage the fine rolling diameter by the solder supply device.

  In the present embodiment, the moving speed of the squeegee mechanisms 11 and 12 in the sliding direction can be increased. This is because a sufficient amount of liquefied cream solder 2 can be secured by the diaphragm 71 even if the moving speed of the squeegee mechanisms 11 and 12 in the sliding direction is increased. In addition, since a sufficient amount of liquefied cream solder 2 can be secured by the diaphragm 71, variations in thixotropy (ease of liquefaction) of the cream solder 2 can be absorbed. By increasing the moving speed of the squeegee 13, the production tact can be improved.

Second Embodiment
Next, a second embodiment of the present technology will be described. In the description after the second embodiment, members having the same functions and configurations as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.

  FIG. 9 is a perspective view showing a squeegee mechanism according to the second embodiment. FIG. 10 is a top view showing the squeegee mechanism.

  This squeegee mechanism is different from the above-described first embodiment in that guide portions 90 are disposed on both end sides in the width direction (direction perpendicular to the sliding direction) of the squeegee 13 (and the vibrating portion 70). Yes. About another point, it is the same as that of the above-mentioned 1st Embodiment.

  The guide part 90 includes a first guide 90a and a second guide 90b. The first guide 90a and the second guide 90b are made of a material such as metal or resin, and are formed, for example, such that the front side of a flat plate member is curved outward. The first guide 90a and the second guide 90b are disposed substantially perpendicular to the horizontal plane. By the first guide 90 a and the second guide 90 b, it is possible to prevent the cream solder 2 from leaking from the side of the squeegee 13.

  Third piezoelectric element sections 93 are provided on the outer surfaces of the first guide 90a and the second guide 90b, respectively. For example, the third piezoelectric element portion 93 is disposed at a position corresponding to a place where the solder rolling 2a is formed.

  The third piezoelectric element unit 93 is electrically connected to the control unit 60 and vibrates at a predetermined frequency in accordance with the control of the control unit 60. Thereby, the first guide 90a and the second guide 90b vibrate in the width direction at a predetermined frequency and amplitude. The frequency at which the third piezoelectric element portion 93 vibrates may be the same as or different from that of the first piezoelectric element portion 72a and the second piezoelectric element portion 72b.

  The third piezoelectric element portion 93 may be covered with a cover member (not shown), for example. Thereby, it is possible to prevent the cream solder 2 from adhering to the third piezoelectric element portion 93.

  The first guide 90 a and the second guide 90 b are each attached to the squeegee holding member 14 via a fifth vibration insulating material 94. Thereby, it is possible to prevent the vibrations of the first guide 90 a and the second guide 90 b from being transmitted to the squeegee 13. The first guide 90 a and the second guide 90 b are not in contact with the squeegee 13 and the vibration unit 70, and are between the first guide 90 a and the second guide 90 b and the squeegee 13 and the vibration unit 70. A gap 95 is formed. The squeegee mechanisms 11 and 12 are configured to allow part of the cream solder 2 to escape to the rear side of the squeegee 13 through the gap 95.

  The first guide 90a and the second guide 90b may be subjected to low friction processing or low adhesion processing (or a combination thereof) on the cream solder 2 on the surface thereof.

[Description of operation]
Next, the operation of the screen printing apparatus 100 according to the second embodiment will be described.
When the movement of the first squeegee mechanism 11 is started (see the solid line in FIG. 7A), a voltage is applied to the first piezoelectric element part 72a and the second piezoelectric element part 72b, and further, the third piezoelectric element part A voltage is also applied to the element portion 93. Thereby, the diaphragm 71, the first guide 90a, and the second guide 90b of the first squeegee mechanism 11 are vibrated.

  The first guide 90a and the second guide 90b support the solder rolling 2a from the side to prevent the cream solder 2 from leaking sideways, and give vibration to the solder rolling 2a. In this way, by applying vibration to the solder rolling 2a from the side, variations in the rolling speed of the solder rolling 2a in the width direction (X-axis direction) can be suppressed.

  That is, when the first guide 90a and the second guide 90b are disposed on both ends in the width direction of the squeegee 13 in order to prevent side leakage of the solder, both ends in the width direction of the solder rolling 2a are the first guides. 90a and the second guide 90b. The support of the solder rolling 2a by this guide becomes the rolling resistance of the solder rolling 2a, and the rolling speed of the solder rolling 2a varies in the width direction. For example, the rolling speed is relatively high near the center in the width direction of the solder rolling 2a, and the rolling speed is relatively slow at both ends in the width direction of the solder rolling 2a. Thereby, there exists a possibility that the filling quality of the cream solder 2 with respect to the pattern hole 4 provided in the screen 3 may fall.

  On the other hand, as described above, since the first guide 90a and the second guide 90b are vibrated in the width direction, the rolling resistance described above can be reduced. Therefore, variation in the rolling speed of the solder rolling 2a in the width direction (X-axis direction) can be suppressed. Thereby, the reduction of the filling quality of the cream solder 2 with respect to the pattern hole 4 provided in the screen 3 can be suppressed.

  When the first squeegee mechanism 11 is moved in the sliding direction, a part of the cream solder 2 escapes to the rear side of the squeegee 13 through the gap 95 and remains on the screen 3.

  When the first squeegee mechanism 11 reaches the vicinity of the end of the screen 3, the first squeegee mechanism 11 is moved upward, and the second squeegee mechanism 12 is moved downward (see the broken line in FIG. 7B). .

  The first guide 90 a and the second guide 90 b may be vibrated even when the first squeegee mechanism 11 is moved upward and the squeegee 13 is separated from the screen 3. Thereby, it can prevent that the cream solder 2 adheres with respect to the 1st guide 90a part 90 and the 2nd guide 90b part 90. FIG.

  When the second squeegee mechanism 12 is moved downward and the squeegee 13 of the second squeegee mechanism 12 comes into contact with the substrate 1, the movement of the second squeegee mechanism 12 starts in the sliding direction. (See the solid line in FIG. 7B).

  When the second squeegee mechanism 12 is moved, the cream solder 2 that has escaped from the gap of the first squeegee mechanism 11 and left on the screen 3 is moved to the front ends of the first guide 90a and the second guide 90b. Collected by (curved part). Thereafter, printing by the first squeegee mechanism 11 and printing by the second squeegee mechanism 12 are alternately repeated.

<Various modifications>
Here, the angle at which the tip of the second diaphragm 71b contacts the solder rolling 2a will be described. FIG. 11 is a diagram illustrating an angle at which the tip of the second diaphragm 71b contacts the solder rolling 2a. As shown in FIG. 11, a tangent line is drawn with respect to the solder rolling 2a at the point where the tip of the second diaphragm 71b contacts the solder rolling 2a. When the direction in which the solder rolling 2a is rotated (counterclockwise in the figure) is the direction in which the angle increases, the angle from this tangent is 90 ° or more. The part touches an obtuse angle ". On the other hand, when the angle from the tangent is less than 90 °, it is referred to as “the tip is in contact with an acute angle” in this specification.

  In the above-described embodiment, since the angle from the tangent is 90 ° or more, the distal end portion of the second diaphragm 71b is in contact with the solder rolling 2a at an obtuse angle. In this case, as described above, the solder rolling 2a can be stirred to a deep region, or the rolling diameter of the solder rolling 2a can be made constant. On the other hand, the tip of the second diaphragm 71b may be in contact with the solder rolling 2a at an acute angle. In this case, the second diaphragm 71b can agitate the solder rolling 2a to promote deformation of the shape of the solder rolling 2a. This is effective, for example, when the cream solder 2 has a high solder viscosity.

  In the above-described embodiments, the screen printing apparatus 100 that prints the cream solder 2 on the substrate 1 has been described. On the other hand, the present technology can also be applied to the screen printing apparatus 100 that prints ink (paste-like substance) on paper, cloth, wood, plastic, or the like (substrate).

  In each of the above-described embodiments, a piezoelectric element has been described as an example of a vibration generation source for generating vibration in the diaphragm 71, but the vibration generation source is not limited to this. For example, as another example of the vibration generation source, a motor (used widely in a mobile phone or the like) in which an eccentric weight is attached to the output shaft can be cited.

This technique can also take the following composition.
(1) The paste-like material is slid in the sliding direction on the screen supplied with the paste-like substance, and the paste-like material is placed on the substrate to be printed on the lower side of the screen through holes provided in the screen. A squeegee to print the substance,
A screen printing apparatus comprising: a vibration unit that is disposed on a front side in a sliding direction of the squeegee and that vibrates the paste-like substance.
(2) The screen printing apparatus according to (1) above,
The vibration unit has a first diaphragm that rolls while applying vibration to the pasty substance on the front side in the sliding direction of the squeegee when the squeegee is being slid on the screen. .
(3) The screen printing apparatus according to (1) or (2) above,
The screen printing apparatus further includes a second diaphragm that is disposed on the front side in the sliding direction with respect to the first diaphragm and that vibrates and agitates the rolled pasty substance.
(4) The screen printing apparatus according to (3) above,
The second vibration plate is a screen printing apparatus in which an obtuse angle is in contact with a pasty substance in which a tip portion of the second vibration plate is rolled.
(5) The screen printing apparatus according to (3) above,
The second vibration plate is a screen printing apparatus in which the tip end portion of the second vibration plate is in contact with an acute angle with respect to the pasty substance rolled.
(6) The screen printing apparatus according to any one of (2) to (5) above,
Guide portions that are arranged at both ends in the width direction of the squeegee, which is a direction orthogonal to the sliding direction, and that vibrate the pasty substance while supporting the rolled pasty substance from the side. Screen printing device.
(7) The screen printing apparatus according to any one of (1) to (6) above,
A screen printing apparatus, further comprising: a vibration insulating unit that performs vibration isolation between the squeegee and the vibration unit.
(8) The screen printing apparatus according to any one of (1) to (7) above,
The vibrating part is
A vibration source for generating vibration in the vibration section;
A screen printing apparatus comprising: a storage area for storing the vibration generation source so that the paste-like substance does not adhere to the vibration generation source.
(9) The screen printing apparatus according to any one of (1) to (8) above,
The vibration unit is a screen printing apparatus in which low-friction processing or low-adhesion processing is performed on the paste-like substance.
(10) The screen printing apparatus according to any one of (1) to (9),
A moving mechanism for moving the squeegee and the vibrating part in the vertical direction;
The vibration printing unit is a screen printing apparatus that is vibrated even when the squeegee is moved upward and the squeegee is separated from the screen.
(11) The paste-like substance is slid in the sliding direction on the screen supplied with the paste-like substance, and the paste-like substance is placed on the printed material disposed below the screen through the holes provided in the screen. A squeegee to print the substance,
A squeegee mechanism comprising: a vibration part disposed on the front side in the sliding direction of the squeegee and configured to vibrate the pasty substance.
(12) Supply a paste-like substance on the screen,
A squeegee that is slid in the sliding direction on the screen and a vibration part that is disposed on the front side in the sliding direction of the squeegee and that vibrates the pasty substance moves in the sliding direction. Let
A method for producing a printed material, wherein the paste-like substance is printed by a squeegee on a substrate to be printed disposed under the screen through a hole provided in the screen.
(13) Supply cream solder on the screen,
A squeegee that is slid in the sliding direction on the screen, and a vibration part that is disposed on the front side in the sliding direction of the squeegee and that vibrates the cream solder is moved in the sliding direction. ,
By the squeegee, through the hole provided in the screen, the cream solder is printed on the substrate disposed on the lower side of the screen,
A method of manufacturing a substrate, comprising mounting an electronic component on the substrate on which the cream solder is printed.

DESCRIPTION OF SYMBOLS 2 ... Cream solder 2a ... Solder rolling 3 ... Screen 4 ... Pattern hole 10 ... Squeegee part 11 ... 1st squeegee mechanism 12 ... 2nd squeegee mechanism 18 ... Air cylinder 71a ... 1st diaphragm 71b ... 2nd vibration Plate 72a ... First piezoelectric element portion 72b ... Second piezoelectric element portion 74a ... First storage region 74b ... Second storage region 75 ... Fastening member 76 ... Support plate 81 ... Vibration insulating material 90a ... First guide 90b ... second guide 100 ... screen printing apparatus

Claims (13)

The paste-like substance is slid in the sliding direction on the screen to which the paste-like substance is supplied, and the paste-like substance is printed on a substrate to be printed arranged on the lower side of the screen through a hole provided in the screen. Squeegee to do,
A screen printing apparatus comprising: a vibration unit that is disposed on a front side in a sliding direction of the squeegee and that vibrates the paste-like substance. The screen printing apparatus according to claim 1,
The vibration unit has a first diaphragm that rolls while applying vibration to the pasty substance on the front side in the sliding direction of the squeegee when the squeegee is being slid on the screen. . The screen printing apparatus according to claim 2,
The screen printing apparatus further includes a second diaphragm that is disposed on the front side in the sliding direction with respect to the first diaphragm and that vibrates and agitates the rolled pasty substance. The screen printing apparatus according to claim 3,
The second vibration plate is a screen printing apparatus in which an obtuse angle is in contact with a pasty substance in which a tip portion of the second vibration plate is rolled. The screen printing apparatus according to claim 3,
The second vibration plate is a screen printing apparatus in which the tip end portion of the second vibration plate is in contact with an acute angle with respect to the pasty substance rolled. The screen printing apparatus according to claim 2,
Guide portions that are arranged at both ends in the width direction of the squeegee, which is a direction orthogonal to the sliding direction, and that vibrate the pasty substance while supporting the rolled pasty substance from the side. Screen printing device. The screen printing apparatus according to claim 1,
A screen printing apparatus, further comprising: a vibration insulating unit that performs vibration isolation between the squeegee and the vibration unit. The screen printing apparatus according to claim 1,
The vibrating part is
A vibration source for generating vibration in the vibration section;
A screen printing apparatus comprising: a storage area for storing the vibration generation source so that the paste-like substance does not adhere to the vibration generation source. The screen printing apparatus according to claim 1,
The vibration unit is a screen printing apparatus in which low-friction processing or low-adhesion processing is performed on the paste-like substance. The screen printing apparatus according to claim 1,
A moving mechanism for moving the squeegee and the vibrating part in the vertical direction;
The vibration printing unit is a screen printing apparatus that is vibrated even when the squeegee is moved upward and the squeegee is separated from the screen. The paste-like substance is slid in the sliding direction on the screen to which the paste-like substance is supplied, and the paste-like substance is printed on a substrate to be printed arranged on the lower side of the screen through a hole provided in the screen. Squeegee to do,
A squeegee mechanism comprising: a vibration part disposed on the front side in the sliding direction of the squeegee and configured to vibrate the pasty substance. Supply paste-like substance on the screen,
A squeegee that is slid in the sliding direction on the screen and a vibration part that is disposed on the front side in the sliding direction of the squeegee and that vibrates the pasty substance moves in the sliding direction. Let
A method for producing a printed material, wherein the paste-like substance is printed by a squeegee on a substrate to be printed disposed under the screen through a hole provided in the screen. Supply cream solder on the screen,
A squeegee that is slid in the sliding direction on the screen, and a vibration part that is disposed on the front side in the sliding direction of the squeegee and that vibrates the cream solder is moved in the sliding direction. ,
By the squeegee, through the hole provided in the screen, the cream solder is printed on the substrate disposed on the lower side of the screen,
A method of manufacturing a substrate, comprising mounting an electronic component on the substrate on which the cream solder is printed.