JP2016055468A - Device for printing paste material, mask, squeegee, and method for printing paste material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for printing paste material capable of promoting rolling of paste material by securing cleanliness of the device for printing the paste material.SOLUTION: A first friction change part for a first member having friction coefficient different from base material is disposed on a contact surface with paste material.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a paste material printing apparatus, a mask, a squeegee, and a paste material printing method.

  In recent years, along with the downsizing and thinning of electronic devices, the movement of downsizing, thinning and high integration of electronic components used in electronic devices is active.

  There are various types of electronic components. In the above-mentioned movement, surface mount LSI (Large Scale Integrated Circuits) packages such as BGA (Ball Grid Array) and CSP (Chip Scale Package) are frequently used for semiconductor components, making them smaller, thinner and more pins. In addition, the pitch is reduced. In addition, miniaturization of square chip type electronic components such as resistors and capacitors has been attempted.

  Therefore, in mounting semiconductor components and chip-type electronic components on a substrate, it is required to supply a paste material with higher accuracy than ever in response to the miniaturization of the conductive portion of the substrate.

  Patent Document 1 discloses a method and a printing apparatus for increasing the rolling rotation speed of a paste material accompanying the movement of a squeegee. The technique of Patent Document 1 is a technique for promoting the rolling of the paste material by increasing the rolling rotation speed with a roller provided in the substantially central part of the rolling.

  Patent Document 2 discloses a method of supplying paste materials having different thicknesses on the same substrate using a single mask and a mask structure. In the technique of Patent Document 2, a printing mask including a resin layer made of an ultraviolet curable resin or an ultraviolet softening resin is used. The technique of Patent Document 2 is based on whether or not the resin layer in the vicinity of each opening in the region that has been selectively irradiated with ultraviolet rays and the region that has not been irradiated is elastically deformed by the movement of the squeegee. It is a technology that changes the supply amount of materials.

  Patent Document 3 discloses a mask structure for improving the detachability of the paste material from the mask. The technique of Patent Document 3 is a technique for improving the detachability of the paste material by providing a continuous recess in the outer periphery of the opening on the squeegee surface side of the mask.

  Patent Document 4 discloses a printing machine using a springy metal thin plate squeegee. The technique of Patent Document 4 is a technique for promoting the rolling of the paste material by a spring-like thin metal plate squeegee in which a convex recess having a predetermined depth is provided on the surface in contact with the paste material.

  Note that promoting the rolling of the paste material increases the “thixotropic properties” of the paste material. “Thixotropic” refers to the property that fluidity occurs when a load (force) is applied to a liquid or fluid with high viscosity, and the viscosity recovers when the load is removed. The paste material has thixotropy. Therefore, promoting the rolling of the paste material can further enhance the fluidity of the paste material and facilitate the supply of the paste material to the opening provided in the mask.

JP 2010-260293 A (page 3-5, FIG. 1-4) JP 2008-078571 (page 5-7, FIG. 2) Japanese Patent Laying-Open No. 2005-039124 (page 3-6) Japanese Laid-Open Patent Publication No. 01-300589 (pages 2, 3 and 1, 3)

  Since the technique of Patent Literature 1 increases the rolling rotation speed of the paste material with a roller provided at the substantially central portion of the rolling, it can promote the rolling. However, providing the roller complicates the printing head.

  The technique of Patent Document 2 is a technique for printing paste materials having different thicknesses on the same substrate by using elastic deformation of a resin layer with a single mask thickness, and cannot be expected to promote the rolling of the paste material. .

  The technique of Patent Document 3 is a technique in which a concave portion continuous to the opening on the squeegee surface side of the mask is provided to promote the rolling of the paste material and to improve the detachability of the paste material. The technique of patent document 4 is a technique which accelerates | stimulates rolling of a paste material by providing a convex-concave part in a squeegee.

  As described above, the techniques of Patent Documents 1, 3, and 4 promote the rolling of the paste material by changing the structure of the printing head, mask, or squeegee. However, the techniques of Patent Documents 1, 3 and 4 complicate the print head and provide a concave portion or a concave portion on the mouse or squeegee, so that the squeegee is caught by the concave and convex portions, preventing the smooth squeegee from moving and reducing the wear of the squeegee. There is a problem that invites or impairs printability. Further, the paste material is allowed to remain on the printing head, mask and squeegee. Therefore, the techniques of Patent Documents 1, 3, and 4 have a problem of impairing the cleanliness of the print head, mask, and squeegee.

  An object of the present invention is made in view of the above problems, and provides a paste material printing apparatus, a mask, a squeegee, and a paste material printing method capable of ensuring the cleanliness of the paste material printing apparatus and promoting the rolling of the paste material. It is to provide.

  The paste material printing apparatus according to the present invention is characterized in that the first friction changing portion of the first member having a friction coefficient different from that of the base material is provided on the contact surface with the paste material.

  The mask of the present invention is characterized in that the first friction changing portion of the first member having a friction coefficient different from that of the base material is provided on the contact surface with the paste material.

  The squeegee of the present invention is characterized in that the first friction changing portion of the first member having a friction coefficient different from that of the base material is provided on the contact surface with the paste material.

  In the paste material printing method of the present invention, the first friction changing portion of the first member having a friction coefficient different from that of the base material is provided on the contact surface with the paste material, and the base material and the first friction changing portion are in contact with the paste material. Then, the paste material is printed.

  According to the present invention, it is possible to ensure the cleanliness of the paste material printing apparatus and promote the rolling of the paste material.

It is a section explanatory view showing the example of composition of the paste material printing device of a 1st embodiment of the present invention. It is explanatory drawing which illustrated the printing process of the 1st Embodiment of this invention. It is explanatory drawing which illustrated the mask of the 1st Embodiment of this invention. It is explanatory drawing which showed the other example of the mask of the 1st Embodiment of this invention. It is explanatory drawing which showed the other example of the mask of the 1st Embodiment of this invention. It is sectional explanatory drawing which showed the structural example of the paste material printing apparatus of the 2nd Embodiment of this invention. It is sectional explanatory drawing which showed the structural example of the paste material printing apparatus of the 3rd Embodiment of this invention. It is sectional explanatory drawing which showed the structural example of the paste material printing apparatus of the 4th Embodiment of this invention. It is explanatory drawing which illustrated the squeegee of the 4th Embodiment of this invention. It is explanatory drawing which showed the other example of the squeegee of the 4th Embodiment of this invention. It is sectional explanatory drawing which showed the structural example of the paste material printing apparatus of the 5th Embodiment of this invention.

Embodiments of the present invention will be described below in detail with reference to the drawings.
(First embodiment)
A first embodiment of the present invention will be described. FIG. 1 is an explanatory cross-sectional view showing a configuration example of a paste material printing apparatus 1 according to the first embodiment of the present invention.

  With reference to FIG. 1, the paste material printing apparatus 1 of this embodiment is demonstrated. The paste material printing apparatus 1 includes a mask 10 for printing the paste material 30 on a work (not shown) and a squeegee 20 that “squeezes” the paste material 30. The squeezing will be described later.

  The mask 10 includes a mask base material 10a, a printing opening 10b for printing the paste material 30 on a workpiece, and a friction changing portion 40 in which a filling member 10c is filled with a member having a different friction coefficient from the mask base material 10a. Prepare. The friction change part 40 is formed in the upstream part of squeezing.

  The squeegee 20 sandwiches the paste material 30 between the mask 10 and moves the paste material 30 from left to right while applying a downward printing pressure to the paste material 30.

  At this time, the paste material 30 on the surface of the mask 10 receives a printing pressure from the squeegee 20 and a frictional force from the mask 10 to generate a flow 30a of the paste material in the left direction. The paste material 30 blocked by the squeegee 20 receives a repulsive force from the mask 10 against the printing pressure from the squeegee 20 and a frictional force from the squeegee 20, and pastes in the upper right direction along the surface of the squeegee 20. A material flow 30a is generated. Further, the paste material 30 near the upper side of the squeegee 20 generates a flow 30a of the paste material that leaves the surface of the squeegee 20 due to gravity and changes its direction in the lower right direction.

  As described above, the paste material 30 is moved by the squeegee 20 to move the surface of the mask 10, whereby the paste material flow 30 a described above is generated. Therefore, the entire rolling 30b is generated in the paste material 30 as a large flow of the flow 30a of each paste material 30. The squeegeeing means that the squeegee 20 moves on the surface of the mask 10 and moves the paste material 30 as described above.

  The paste material 30 is squeezed and rolled by the squeegee 20 to improve fluidity. The paste material 30 with improved fluidity is printed at a predetermined position from the printing opening 10 b of the mask 10.

  The mask 10 includes a friction changing unit 40 filled with a member having a friction coefficient different from that of the mask base material 10a. For this reason, the paste material 30 has a friction coefficient different at the boundary between the mask base material 10a and the friction changing portion 40, so that the frictional force received from the mask 10 is locally discontinuous and a load is generated. Due to the generation of the load, local rolling 30c occurs in the flow 30a of the paste material on the surface of the mask 10. Due to the occurrence of the local rolling 30c, the fluidity of the paste material 30 is further improved, and the supply of the paste material 30 to the printing opening 10b is facilitated.

  FIG. 2 is an explanatory diagram illustrating the printing process of this embodiment. With reference to FIG. 2, the printing process of the paste material printing apparatus 1 is demonstrated.

  In FIG. 2A, a workpiece 100 on which a paste material 30 is printed is prepared. The workpiece 100 includes a conductive portion 101 on the surface. In FIG. 2B, the mask 10 is positioned and placed on the prepared workpiece 100.

  In FIG. 2C, a squeegee 20 and a paste material 30 are prepared on the left side of the surface of the mask 10, and the squeegee 20 squeezes the paste material 30 in the right direction. As a result, the overall rolling 30b and the local rolling 30c by the friction changing unit 40 are generated in the paste material 30 as described above. When the local rolling 30c occurs, the rolling of the paste material 30 is promoted, and the paste material 30 is printed on the predetermined conductive portion 101 of the workpiece 100 from the printing opening 10b.

  In FIG. 2D, the mask 10 is separated from the workpiece 100. At this time, a predetermined amount of the paste material 31 to be printed that has been removed from the mask 10 remains printed at a predetermined location of the conductive portion 101 of the workpiece 100. As described above, the paste material printing apparatus 1 prints the paste material 30 on the workpiece 100.

  FIG. 3 is an explanatory diagram illustrating the mask of this embodiment. The mask 10 will be described with reference to FIG.

  FIG. 3A is a diagram of a printing process by the squeegee 20 described in FIG. 2C (the workpiece 100 is not shown). FIG. 3B is a surface where the mask 10 contacts the squeegee 20 and the paste material 30. The cross section taken along the line A-A ′ of the mask 10 in FIG. 3B is the mask 10 in FIG.

  The mask 10 includes a printing opening 10b and a friction changing unit 40 in a mask base material 10a. A plurality of round friction change portions 40 are arranged on the mask 10 in a lattice pattern. The paste material 30 squeezed by the squeegee 20 has its fluidity improved by the plurality of friction changing portions 40 and is supplied to the printing openings 10b.

  FIG. 4 is an explanatory view showing another example of the mask of the present embodiment. The mask 11 will be described with reference to FIG.

  FIG. 4A is a diagram in which the mask 10 is changed to the mask 11 with respect to the drawing of the printing process by the squeegee 20 described in FIG. 2C (the workpiece 100 is not shown). FIG. 4B is a surface where the mask 11 contacts the squeegee 20 and the paste material 30. The cross section taken along the line A-A ′ of the mask 11 in FIG. 4B is the mask 11 in FIG.

  The mask 11 includes a printing opening 11b and a friction changing portion 41 in the mask base material 11a. A plurality of rectangular friction changing portions 41 are arranged in a row on the mask 11. The paste material 30 squeezed by the squeegee 20 is improved in fluidity by a plurality of friction changing portions 41 and supplied to each printing opening 11b.

  FIG. 5 is an explanatory view showing another example of the mask of the present embodiment. The mask 12 will be described with reference to FIG.

  FIG. 5A is a diagram in which the mask 10 is changed to the mask 12 with respect to the drawing of the printing process by the squeegee 20 described in FIG. 2C (the workpiece 100 is not shown). In the mask 12 of FIG. 5B, a plurality of the round friction changing portions 40 described in FIG. 3B are provided in the periphery of the printing opening 12b in addition to the mask 11 described in FIG. 4B. Arranged in a grid. The cross section taken along the line A-A ′ of the mask 12 in FIG. 5B is the mask 12 in FIG.

  The mask 12 includes a printing opening 12b, a round friction changing portion 40, and a rectangular friction changing portion 41 on a mask base material 12a. The paste material 30 squeezed by the squeegee 20 is further improved in fluidity by the plurality of friction changing portions 40 and 41 and is supplied to the printing openings 12b.

  As described above, in this embodiment, local rolling of the paste material occurs in the vicinity of the friction changing portion in which the filling portion provided in the mask base material is filled with a member having a friction coefficient different from that of the mask base material. By causing local rolling in addition to global rolling, the rolling of the paste material is promoted. Therefore, in the present embodiment, the fluidity of the paste material is further improved, and the supply of the paste material to the printing opening can be facilitated. In addition, since the flatness of the friction changing portion on the mask surface is ensured, the paste material does not remain on the mask, and the cleanliness of the mask is ensured.

  As described above, the paste material printing apparatus of the present embodiment can ensure cleanliness and promote the rolling of the paste material.

  In the present embodiment, it has been described that the friction changing portion is provided by a member having a friction coefficient different from that of the mask base material. However, the friction coefficient of the member of the friction changing portion may be larger than the friction coefficient of the mask base material. However, it may be small. That is, it is only necessary that the above-mentioned local rolling is generated in the vicinity of the friction change portion in the paste material that moves in contact with the mask base material and the friction change portion. Therefore, the friction coefficient of the member of the friction change part should just differ from the friction coefficient of a mask base material.

  Further, in the present embodiment, a friction changing portion having a large friction coefficient and a friction changing portion having a small friction coefficient may be provided in a mixed manner with respect to the mask base material. In order to increase the overall frictional force of the mask and promote the overall rolling of the paste material, it is desirable that the friction coefficient of the member of the friction changing portion is larger than the friction coefficient of the mask base material.

  In the present embodiment, the material of the mask base material is not limited, but stainless steel, nickel, nickel alloy, etc., which are generally used as a metal mask base material, can be used. As the member of the friction changing portion, a resin such as epoxy or a different metal having a friction coefficient different from that of the mask base material can be used.

  Moreover, in this embodiment, the surface shape of the friction change part was demonstrated as a round shape or a rectangle. However, the surface shape of the friction change portion is not limited to a round shape or a rectangle. In other words, as described above, the friction changing unit only needs to cause local rolling in the paste material between the mask base material and the friction changing unit. Therefore, the surface shape of the friction changing portion may be, for example, a rhombus, a star, or a triangle, or a substantially donut shape. There may be a printing opening inside the friction changing portion having a substantially donut shape. Furthermore, the size and combination of the surface shape of the friction changing portion are not limited. For example, the friction changer may be provided in a mixture of a large round shape and a small round shape, or a round shape and a rectangular shape. The number of friction change portions may be one or more that are squeezed before the print opening.

  Further, in the present embodiment, the planar arrangement shape of the friction changing portion has been described by regular arrangement such as a lattice shape or a row shape. However, the planar arrangement shape of the friction changing portion is not limited to a regular arrangement such as a lattice shape or a row shape. In other words, the planar arrangement shape of the friction changing portion may not interfere with the printing opening. Therefore, the friction change portion may be arranged in a mixed manner with the printing openings, may be arranged in a staggered pattern or irregularly, or the arrangement shapes may be combined. And it is not limited about the space | interval between friction change parts.

  Thus, the surface shape and size of the friction change portion, the combination, the quantity, the planar arrangement shape, and the distance between each other, as long as the friction change portion causes local rolling in the paste material, as described above, Each is not limited. Then, by providing various friction changing portions on the mask, various local rolling is generated, and the rolling of the paste material is further promoted. Therefore, the fluidity of the paste material is further enhanced, and the supply of the paste material to the finer print openings is facilitated.

  For example, when more fineness is required in the print openings and the intervals between the print openings, the friction change portions are densely provided to increase the fluidity of the paste material according to the degree of fineness. be able to.

  Moreover, the cross-sectional shape of the filling part of this embodiment is not limited. That is, it is only necessary that the friction changing portion is provided on the mask surface by the member filled in the filling portion, and the cross-sectional shape of the filling portion is not limited. For example, the cross-sectional shape of the filling portion may be a tapered shape, a stepped shape, or a drum shape. The cross-sectional shape of the filling part is tapered, stepped, and drum-shaped, making it easy to process the filling part, facilitating filling of the member into the filling part, or suppressing dropping of the filled member. The effect of doing etc. is acquired.

Moreover, the paste material of this embodiment should just be what can improve fluidity | liquidity by promoting the rolling of a paste material. For example, the paste material may be a solder paste material or a printing ink paste material.
(Second Embodiment)
A second embodiment of the present invention will be described. FIG. 6 is a cross-sectional explanatory view showing a configuration example of the paste material printing apparatus 2 according to the second embodiment of the present invention.

  With reference to FIG. 6, the paste material printing apparatus 2 of this embodiment is demonstrated. The paste material printing apparatus 2 is different from the first embodiment in that the mask 10 described with reference to FIG. Therefore, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the mask 13, a mask base material 13a, a printing opening 13b for printing the paste material 30 on a work (not shown), and a member having a different friction coefficient from the mask base material 13a are filled in the filling portion 13c. A friction changing unit 42 is provided. Unlike the filling portion 10 c of the mask 10 described with reference to FIG. 1, the filling portion 13 c does not penetrate the mask 10. The friction changing unit 42 is filled with a member having a friction coefficient different from that of the mask base material 13a in the filling unit 13c having a predetermined depth. Therefore, the mask 13 can generate the local rotation 30 c by the friction changing unit 42 and promote the rotation of the paste material 30.

  As described above, the mask of the present embodiment generates a local rotation by the friction changing portion and promotes the rotation of the paste material, so that the same effect as the above-described embodiment can be obtained. Furthermore, in this embodiment, since a filling part does not penetrate a mask, the usage-amount of a filling member is reduced and the fall of the intensity | strength of a mask is suppressed.

In addition, the depth from the mask surface of the filling part of this embodiment is not limited. That is, it is only necessary that the friction changing portion is provided on the mask surface by a member filled in the filling portion, and the depth of the filling portion is not limited.
(Third embodiment)
A third embodiment of the present invention will be described. FIG. 7 is an explanatory cross-sectional view showing a configuration example of the paste material printing apparatus 3 according to the third embodiment of the present invention.

  With reference to FIG. 7, the paste material printing apparatus 3 of this embodiment is demonstrated. The paste material printing apparatus 3 is different from the second embodiment in that the mask 13 described with reference to FIG. Therefore, the same components as those in the second embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The mask 14 has a mask base material 14a, a printing opening 14b for printing the paste material 30 on a work (not shown), and a member having a different friction coefficient from the mask base material 14a on the surface of the mask base material 14a. A plated friction changing portion 43 is provided. The friction changing portion 43 does not include the mask filling portions 10c and 13c described in FIGS. 1 and 6 in the mask, and a member having a friction coefficient different from that of the mask base material 14a is plated on the mask base material 14a. Therefore, the mask 14 can generate the local rotation 30 c by the friction changing unit 43 and promote the rotation of the paste material 30.

  As described above, the mask of the present embodiment generates a local rotation by the friction changing portion and promotes the rotation of the paste material, so that the same effect as the above-described embodiment can be obtained. Furthermore, in this embodiment, since the member having a friction coefficient different from that of the mask base material is plated on the mask surface, the usage amount of the member of the friction change portion is reduced. Furthermore, in this embodiment, since the filling part is not provided in the mask, the strength of the mask does not decrease.

In the present embodiment, it has been described that the member of the friction changing portion is plated. However, the member of the friction changing portion is not limited to being plated. That is, it is only necessary that the friction changing portion is provided on the mask surface with such a thickness that the member of the friction changing portion can maintain a predetermined frictional force and the remaining paste material can be reduced. For example, the friction change part may be formed by vapor deposition or application of a member of the friction change part.
(Fourth embodiment)
A fourth embodiment of the present invention will be described. FIG. 8 is an explanatory cross-sectional view showing a configuration example of the paste material printing apparatus 4 according to the fourth embodiment of the present invention.

  With reference to FIG. 8, the paste material printing apparatus 4 of this embodiment is demonstrated. The paste material printing apparatus 4 is different from the first embodiment in that the mask 10 described in FIG. 1 is changed to a mask 15 and the squeegee 20 is changed to a squeegee 21. Therefore, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The mask 15 includes a mask base material 15a and a printing opening 15b for printing the paste material 30 on a work (not shown). The squeegee 21 includes a squeegee base material 21a and a friction changing portion 44 in which a member having a friction coefficient different from that of the squeegee base material 21a is filled in the filling portion 21b.

  The squeegee 21 sandwiches the paste material 30 between the mask 15 and moves the paste material 30 from the left to the right while applying a downward printing pressure to the paste material 30. At this time, the paste material 30 has a different friction coefficient at the boundary between the squeegee base material 21 a and the friction changing portion 44, so that the frictional force received from the squeegee 21 is locally discontinuous and a load is generated. Due to the load, local rolling 30c occurs in the paste material flow 30a on the surface of the squeegee 21. Due to the occurrence of the local rolling 30c, the fluidity of the paste material 30 is further improved, and the supply of the paste material 30 to the printing opening 15b is facilitated.

  FIG. 9 is an explanatory diagram illustrating the squeegee of this embodiment. The squeegee 21 will be described with reference to FIG.

  9A shows a printing process using the squeegee 20 described in FIG. 2C (the workpiece 100 is not shown). The mask 10 is changed to the mask 15 and the squeegee 20 is changed to the squeegee 21. It is a figure. FIG. 9B is a diagram of the surface where the squeegee 21 contacts the paste material 30. A cross section taken along line B-B ′ of the squeegee 21 in FIG. 9B is the squeegee 21 in FIG.

  The squeegee 21 includes the friction changing unit 44 described above on the squeegee base material 21a. In the squeegee 21, a plurality of round friction changing portions 44 are arranged in a lattice pattern. The paste material 30 squeezed by the squeegee 21 is improved in fluidity by a plurality of friction changing portions 44 and supplied to each printing opening 15b.

  FIG. 10 is an explanatory view showing another example of the squeegee of the present embodiment. The squeegee 22 will be described with reference to FIG.

  In FIG. 10A, the mask 10 is changed to the mask 15 and the squeegee 20 is changed to the squeegee 22 with respect to the drawing of the printing process by the squeegee 20 described in FIG. 2C (the workpiece 100 is not shown). It is a figure. FIG. 10B is a diagram of a surface where the squeegee 22 contacts the paste material 30. A cross section taken along line B-B ′ of the squeegee 22 in FIG. 10B is the squeegee 22 in FIG.

  In the squeegee 22, a plurality of rectangular friction changing portions 45 are arranged in a line. The paste material 30 squeezed by the squeegee 22 has its fluidity improved by a plurality of friction changing portions 45 and is supplied to each printing opening 15b.

  As described above, in this embodiment, the paste material is locally applied in the vicinity of the friction changing portion in which the filling portion provided in the squeegee base material that contacts the paste material is filled with a member having a friction coefficient different from that of the squeegee base material. Rolling occurs. By causing local rolling in addition to global rolling, the rolling of the paste material is promoted. Therefore, in the present embodiment, the fluidity of the paste material is further improved, and the supply of the paste material to the printing opening can be facilitated. In addition, since the flatness of the squeegee surface is ensured, the paste material does not remain on the squeegee and the cleanliness of the squeegee is ensured.

  As described above, the paste material printing apparatus of the present embodiment can ensure cleanliness and promote the rolling of the paste material. Furthermore, in this embodiment, since there is no change to the mask, it does not affect the production cost and production period of the mask produced for each workpiece, and only the squeegee supports the rolling of the paste material. can do. Therefore, the present embodiment can improve the printing performance as a paste material printing apparatus only with a squeegee.

  In the present embodiment, it has been described that the friction changing portion is provided by a member having a friction coefficient different from that of the squeegee base material. However, the friction coefficient of the member of the friction changing portion may be larger than the friction coefficient of the squeegee base material. However, it may be small. That is, it is only necessary that the above-mentioned local rolling is generated in the vicinity of the friction change portion in the paste material that moves in contact with the squeegee base material and the friction change portion. Therefore, it is only necessary that the friction coefficient of the member of the friction changing portion is different from the friction coefficient of the squeegee base material.

  Further, in the present embodiment, a friction changing portion having a large friction coefficient and a friction changing portion having a small friction coefficient may be provided in a mixed manner with respect to the squeegee base material. In order to increase the overall frictional force of the squeegee and promote the overall rolling of the paste material, it is desirable that the friction coefficient of the member of the friction changing portion is larger than the friction coefficient of the squeegee base material.

  In this embodiment, the material of the squeegee base material is not limited, but stainless steel, nickel, nickel alloy, urethane rubber, etc., which are generally used as a metal mask base material, can be used. As the member of the friction changing portion, a resin such as epoxy having a friction coefficient different from the friction coefficient of the squeegee base material or a different metal can be used.

  Moreover, in this embodiment, the surface shape of the friction change part was demonstrated as a round shape or a rectangle. However, the surface shape of the friction change portion is not limited to a round shape or a rectangle. That is, as described above, it is only necessary that local rolling is generated in the paste material between the squeegee base material and the friction changing portion. Therefore, the surface shape of the friction changing portion may be, for example, a rhombus, a star, or a triangle, or a substantially donut shape. Furthermore, the size and combination of the surface shape of the friction changing portion are not limited. For example, the friction changer may be provided in a mixture of a large round shape and a small round shape, or a round shape and a rectangular shape. And the quantity of a friction change part should just be one or more.

  Further, in the present embodiment, the planar arrangement shape of the friction changing portion has been described by regular arrangement such as a lattice shape or a row shape. However, the planar arrangement shape of the friction changing portion is not limited to a regular arrangement such as a lattice shape or a row shape. That is, the friction change parts may be arranged in a staggered pattern or irregularly, or the arrangement shapes may be combined. And it is not limited about the space | interval between friction change parts.

  Thus, the surface shape and size of the friction change portion, the combination, the quantity, the planar arrangement shape, and the distance between each other, as long as the friction change portion causes local rolling in the paste material, as described above, Each is not limited. By providing various friction changing portions on the squeegee, various local rolling is generated, and the rolling of the paste material is further promoted. Therefore, the fluidity of the paste material is further enhanced, and the supply of the paste material to the finer print openings is facilitated.

  Moreover, the cross-sectional shape of the filling part of this embodiment is not limited. That is, it is sufficient that the friction changing portion is provided on the squeegee surface by a member filled in the filling portion, and the cross-sectional shape of the filling portion is not limited. For example, the cross-sectional shape of the filling portion may be a tapered shape, a stepped shape, or a drum shape. The cross-sectional shape of the filling part is tapered, stepped, and drum-shaped, making it easy to process the filling part, facilitating filling of the member into the filling part, or suppressing dropping of the filled member. The effect of doing etc. is acquired.

Moreover, the friction change part of this embodiment may be provided in the filling part and squeegee surface which do not penetrate a squeegee similarly to 2nd Embodiment or 3rd Embodiment, respectively, and the same effect is acquired, respectively.
(Fifth embodiment)
A fifth embodiment of the present invention will be described. FIG. 11 is a cross-sectional explanatory view showing a configuration example of the paste material printing apparatus 5 according to the fifth embodiment of the present invention.

  With reference to FIG. 11, the paste material printing apparatus 5 of this embodiment is demonstrated. The paste material printing apparatus 5 is different from the fourth embodiment in that the mask 15 described in FIG. 8 is changed to the silk screen 50, the squeegee 21 is changed to the squeegee 23, and the workpiece 200 is added. Therefore, the same components as those in the fourth embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The paste material printing apparatus 5 includes a workpiece 200, a silk screen 50 for printing the paste material 30 on the workpiece 200, and a squeegee 23.

  The silk screen 50 includes a printing opening 50b where the mask emulsion 50a is applied to a portion where the paste material 30 is not printed on the workpiece 200 and the mask emulsion 50a is not applied to a portion where the paste material 30 is printed.

  The squeegee 23 includes a friction changing section 46 in which a member having a friction coefficient different from that of the squeegee base material 23a is plated on the surface of the squeegee base material 23a. The friction changing unit 46 does not include the filling portion 21c of the squeegee 21 described in FIG. 8 in the squeegee, and is provided by plating the squeegee base material 23a with a member having a different friction coefficient from the squeegee base material 23a.

  The squeegee 23 sandwiches the paste material 30 between itself and the silk screen 50, and moves the paste material 30 from the left to the right on the surface of the silk screen 50 while applying a downward printing pressure to the paste material 30.

  At this time, the paste material 30 on the surface of the silk screen 50 receives the printing pressure from the squeegee 23 and the frictional force from the silk screen 50, and a paste material flow 30a in the left direction is generated. The paste material 30 blocked by the squeegee 23 receives the repulsive force from the silk screen 50 against the printing pressure from the squeegee 23 and the frictional force from the squeegee 23, and moves in the upper right direction along the surface of the squeegee 23. A paste material flow 30a is generated. Further, the paste material 30 near the upper side of the squeegee 23 generates a flow 30a of the paste material that leaves the surface of the squeegee 23 due to gravity and changes its direction in the lower right direction.

  As described above, the paste material 30 is moved by the squeegee 23 to move the surface of the silk screen 50, whereby the above-described paste material flow 30a is generated. Therefore, the entire rolling 30b is generated in the paste material 30 as a large flow of the flow 30a of each paste material 30.

  Further, the paste material 30 is squeezed and rolled by the squeegee 23 to improve the fluidity. The paste material 30 with improved fluidity is pushed out to the workpiece 200 from the printing opening 50b where the mask emulsion 50a is not applied.

  The silk screen 50 moves away from the workpiece 200 behind the squeegee 23 that has squeezed the paste material 30. A predetermined amount of paste material 30 is printed as a printing paste material 32 at a predetermined position of the workpiece 200 after the silk screen 50 is separated.

  Here, the squeegee 23 includes a friction changing portion 46 plated with a member having a friction coefficient different from that of the squeegee base material 23a. Therefore, the paste material 30 has a different friction coefficient at the boundary between the squeegee base material 23a and the friction changing portion 46, and therefore the frictional force received from the squeegee 23 is locally discontinuous and a load is generated. Due to the load, local rolling 30c occurs in the paste material flow 30a on the squeegee surface. Due to the occurrence of the local rolling 30c, the fluidity of the paste material 30 is further enhanced, and the supply of the paste material 30 to the printing opening 50b is facilitated.

  As described above, in this embodiment, the paste material is locally applied in the vicinity of the friction changing portion in which the filling portion provided in the squeegee base material that contacts the paste material is filled with a member having a friction coefficient different from that of the squeegee base material. Rolling occurs. By causing local rolling in addition to global rolling, the rolling of the paste material is promoted. Therefore, in the present embodiment, the fluidity of the paste material is further improved, and the supply of the paste material to the printing opening can be facilitated. In addition, since the flatness of the squeegee surface is ensured, the paste material does not remain on the squeegee and the cleanliness of the squeegee is ensured. In the paste material printing apparatus using a silk screen, as described above, promoting the rolling of the paste material is effective for printing a fine paste material with a work.

  As described above, the paste material printing apparatus of the present embodiment can ensure the cleanliness and promote the rolling of the paste material as in the previous embodiments. Furthermore, in this embodiment, since the silk screen is not changed, the paste material is rolled only with a squeegee without affecting the production cost and production period of the silk screen produced for each workpiece. Can be promoted. Therefore, the present embodiment can improve the printing performance as a paste material printing apparatus only with a squeegee. And in this embodiment, since the member of a friction coefficient different from a squeegee base material is plated on the squeegee surface, the usage-amount of the member of a friction change part is reduced. Moreover, in this embodiment, since a filling part is not provided in a squeegee, the intensity | strength of a squeegee does not fall.

  In the present embodiment, it has been described that the member of the friction changing portion is plated. However, the member of the friction changing portion is not limited to being plated. That is, it is only necessary that the friction changing portion is provided on the squeegee surface with such a thickness that the member of the friction changing portion can maintain a predetermined frictional force and the remaining paste material can be reduced. For example, the friction change part may be formed by vapor deposition or application of a member of the friction change part.

  Note that the present invention is not limited to the above-described embodiments, and various modifications and changes can be made without departing from the spirit of the present invention.

  For example, in the first to fourth embodiments of the present invention, it is described that the friction changing portion is provided in one of the mask and the squeegee, but the friction changing portion may be provided in both the mask and the squeegee. By providing the friction changing portion on both the mask and the squeegee, the rolling of the paste material is further promoted.

Part or all of the above embodiments can be described as the following supplementary notes, but is not limited to the following.
(Appendix 1)
A paste material printing apparatus, wherein a first friction changing portion of a first member having a friction coefficient different from that of a base material is provided on a contact surface with the paste material.
(Appendix 2)
2. The paste material printing apparatus according to claim 1, wherein the first friction changing unit is configured such that the first member is filled in a filling unit provided in the base material.
(Appendix 3)
The paste material printing apparatus according to claim 2, wherein the filling portion penetrates the base material or has a predetermined depth from the contact surface.
(Appendix 4)
The paste material printing apparatus according to appendix 3, wherein a cross-sectional shape of the filling portion is a taper shape, a stepped shape, or a drum shape.
(Appendix 5)
The paste material printing apparatus according to any one of appendices 1 to 4, wherein the first member is plated, vapor-deposited, or applied on the contact surface.
(Appendix 6)
The paste material printing apparatus according to any one of appendices 1 to 5, wherein the friction coefficient of the first member is larger than that of the base material.
(Appendix 7)
One or more said 1st friction change parts are provided in the said base material, The paste material printing apparatus in any one of the additional remarks 1-6 characterized by the above-mentioned.
(Appendix 8)
The paste material printing apparatus according to any one of appendices 1 to 7, wherein a planar shape of the contact surface of the first friction changing portion is a circle, a polygon, a substantially donut shape, or a combination thereof.
(Appendix 9)
The paste material printing apparatus according to any one of appendices 1 to 8, wherein a planar arrangement shape of the contact surface of the first friction changing portion is a line shape, a lattice shape, a staggered lattice shape, or an irregular shape. .
(Appendix 10)
The paste material according to any one of appendices 1 to 9, wherein an arrangement density of the first friction changing portions is increased in correspondence with a degree of fineness of a printing opening and a space between the printing openings. Printing device.
(Appendix 11)
11. The paste material printing apparatus according to any one of appendices 1 to 10, further comprising a second friction changing portion of a second member having a friction coefficient different from that of the base material and the first member on the contact surface. .
(Appendix 12)
The paste material printing apparatus according to any one of appendices 1 to 11, wherein at least one of the mask base material and the squeegee base material is the base material.
(Appendix 13)
The paste material printing according to appendix 12, wherein when the base material is a mask base material, at least one of the first friction change portion and the second friction change portion is provided in an upstream portion of squeezing. apparatus.
(Appendix 14)
The paste material printing apparatus according to any one of appendices 1 to 13, wherein the paste material is a solder paste material.
(Appendix 15)
A mask comprising a first friction changing portion of a first member having a friction coefficient different from that of a base material on a contact surface with a paste material.
(Appendix 16)
16. The mask according to appendix 15, wherein one or more first friction changing portions that are squeezed before an opening for printing are arranged.
(Appendix 17)
A squeegee, wherein a first friction changing portion of a first member having a friction coefficient different from that of a base material is provided on a contact surface with a paste material.
(Appendix 18)
The first friction changing portion of the first member having a different friction coefficient from the base material is provided on the contact surface with the paste material, and the base material and the first friction changing portion are in contact with the paste material to print the paste material. A paste material printing method characterized by the above.

1, 2, 3, 4, 5 Paste material printing device 10, 11, 12, 13, 14, 15 Mask 10a, 11a, 12a, 13a, 14a, 15a Mask base material 10b, 11b, 12b, 13b, 14b, 15b 50b Printing opening 10c, 13c, 21b Filling portion 20, 21, 22, 23 Squeegee 21a, 23a Squeegee base material 30 Paste material 30a Paste material flow 30b Overall rolling 30c Local rolling 31, 32 Printed paste material 40 , 41, 42, 43, 44, 45, 46 Friction changing part 50 Silk screen 50a Emulsion for mask 100, 200 Work 101 Conducting part

Claims (10)

A paste material printing apparatus, wherein a first friction changing portion of a first member having a friction coefficient different from that of a base material is provided on a contact surface with the paste material. The paste material printing apparatus according to claim 1, wherein the first member is filled in a filling portion in which the first friction changing portion is provided in the base material. The paste material printing apparatus according to claim 2, wherein the filling portion penetrates the base material or has a predetermined depth from the contact surface. The paste material printing apparatus according to claim 1, wherein the first member is plated, vapor-deposited, or applied on the contact surface. The paste material printing apparatus according to claim 1, wherein the friction coefficient of the first member is larger than that of the base material. The paste material according to any one of claims 1 to 5, further comprising a second friction changing portion of a second member having a different friction coefficient from the base material and the first member on the contact surface. Printing device. The paste material printing apparatus according to claim 1, wherein at least one of the mask base material and the squeegee base material is the base material. A mask comprising a first friction changing portion of a first member having a friction coefficient different from that of a base material on a contact surface with a paste material. A squeegee, wherein a first friction changing portion of a first member having a friction coefficient different from that of a base material is provided on a contact surface with a paste material. The first friction changing portion of the first member having a friction coefficient different from that of the base material is provided on the contact surface with the paste material, and the base material and the first friction changing portion are in contact with the paste material to print the paste material. The paste material printing method characterized by the above-mentioned.

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