JP5361343B2 - Mask for printing and method for printing on substrate using the same - Google Patents

Description

  The present invention relates to a printing mask and a printing method on a substrate using the same.

2. Description of the Related Art Conventionally, a printing mask such as a metal mask has been used to screen-print a printing material such as solder or resin paste on a substrate. For example, Patent Document 1 discloses a printing mask made of a combination-stretched screen plate in which a supporting screen mesh and a printing screen mesh are combined. The supporting screen mesh is fixed to the plate frame in a tensioned state, and the printing screen mesh is bonded to the center of the supporting screen mesh, and is printed by being cut out from the roll material and wound. The screen mesh is configured to be corrected by the tension of the supporting screen mesh.
JP 2005-305979 A

  However, in the above-described conventional printing mask, when the tension acting on the supporting screen mesh becomes excessive, the printing screen mesh may be curved so as to protrude upward. For this reason, when a printing mask is placed on the substrate that is the substrate to be printed, a gap is created between the center of the printing mask and the substrate, and the printing material applied through the printing mask flows into this gap, and printing is performed. There was a problem of material bleeding.

  SUMMARY An advantage of some aspects of the invention is that it provides a printing mask capable of improving print quality at low cost and a method for printing on a substrate using the same.

  The object of the present invention includes a frame, a saddle provided on the frame, and a plate-like mask body bonded to the saddle, and the saddle is in a state in which tension is applied. A printing mask fixed to the frame and having an opening region formed so as to expose a pattern hole of the mask body, the mask body having a long shape on a back surface side in contact with a printing surface This is achieved by a printing mask comprising a reinforcing member.

  In this printing mask, the reinforcing member preferably includes a rib extending in a direction orthogonal to the back surface of the mask main body.

  Moreover, it is preferable that the said reinforcement member is arrange | positioned so that the action direction of the tension | tensile_strength with respect to the said brazing material and a longitudinal direction may correspond substantially.

  In addition, the object of the present invention is a method for printing on a substrate using the above-described printing mask, the step of placing the substrate on a table placement surface on which a groove is formed, and the reinforcing member is Arranging the printing mask so as to be accommodated in the groove, and bringing the lower surface of the printing mask into close contact with the substrate; supplying a printing material onto the printing mask; and the substrate through the pattern hole And applying a printing material to the substrate.

  According to the printing mask and the method for printing on a substrate of the present invention, it is possible to improve the printing quality at low cost.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 and 2 are a front view and a back view of a printing mask according to an embodiment of the present invention. FIG. 3 is a cross-sectional view taken along the line AA in FIG. As shown in FIG. 1 to FIG. 3, the printing mask 1 includes a high-rigidity frame 2 made of a metal material or the like formed in a frame shape, and a bridging material 4 provided by being stretched on the frame 2. And a mask body 6 bonded to the brazing material 4.

  The eaves 4 is a stretchable mesh member made of synthetic resin fiber yarn such as polyester or a metal wire such as stainless steel, and the entire edge is applied with tension applied as shown by an arrow in FIG. Is fixed to the frame 2 by means such as adhesion or welding. An opening region 41 is formed at the center of the brazing material 4.

  The mask body 6 is a thin plate-like or mesh-like member made of stainless steel, ceramic, or the like, and the entire outer edge is bonded and fixed to the collar member 4. In the center of the mask body 6, a pattern hole 61 for printing in a predetermined pattern on the substrate is formed, and this pattern hole 61 is exposed to the outside through the opening region 41 of the brazing material 4. Is arranged. The thickness of the mask body 6 is not particularly limited, but is usually about 0.2 to 3.0 mm, and particularly about 0.5 to 1.5 mm.

  The above configuration is the same as that of a conventional printing mask, but the printing mask 1 of the present embodiment is characterized in that a reinforcing member 62 is provided on the back side of the mask body 6.

  The reinforcing members 62 are long members made of a highly rigid material such as a metal material such as stainless steel or aluminum, and a plurality of reinforcing members 62 are arranged in parallel to each other. In the present embodiment, the longitudinal direction of each reinforcing member 62 is substantially coincident with the direction of tension applied to the saddle member 4, and the reinforcing member 62 is superimposed on the double-sided tape attached to the back side of the mask body 6. After that, the adhesive portion is covered with a sealing material such as an epoxy resin to prevent peeling by a cleaning solvent. The fixing of the reinforcing member 62 to the mask main body 6 is not particularly limited, such as attachment by a connecting tool or welding other than adhesion. It is also possible to integrally mold the mask body 6 and each reinforcing member 62.

  The cross-sectional shape perpendicular to the longitudinal direction of the reinforcing member 62 is U-shaped as shown in FIG. 4, and includes two ribs 621 and 621 extending in a direction orthogonal to the back surface of the mask body 6. When the thickness t of the reinforcing member 62 is too small, it is difficult to obtain a sufficient reinforcing effect. On the other hand, when the thickness t is too large, the processing operation of the table to be described later tends to be complicated. More preferably, the thickness is 0.5 to 1.0 mm.

  Next, a method for printing on a substrate using the printing mask 1 having the above-described configuration will be described with reference to the process side view shown in FIG.

  First, as shown in FIG. 5A, the substrate w is placed on the placement surface 8 a of the table 8. A plurality of groove portions 81 provided corresponding to the reinforcing members 62 are formed on the mounting surface 8a of the table 8, and the groove portions 81 are arranged at intervals so as to be parallel to each other. The substrate w is fixed at a predetermined position on the placement surface 8a by means of vacuum suction, magnetic force, or suction tape.

  Next, the printing mask 1 is set above the substrate w, and the printing mask 1 is lowered so that the reinforcing members 62 of the printing mask 1 are accommodated in the grooves 81 of the table 8, respectively. As shown in b), the back side of the mask body 6 is brought into close contact with the upper surface of the substrate w.

  Thereafter, according to a conventional method, a printing material such as a sealing resin is supplied to the surface side of the mask body 6 and the printing material is pushed into the pattern holes 61 of the mask body 6 by the operation of the squeegee so that a predetermined position on the substrate w is obtained. The printing material can be applied to.

  According to the printing mask 1 of the present embodiment, the reinforcement provided on the back side of the mask main body 6 even when the central portion of the mask main body 6 may protrude in a convex shape due to excessive tension acting on the collar 4. This protrusion is suppressed by the member 62, and the mask main body 6 can be maintained in a flat state. Therefore, the entire upper surface of the substrate w can be brought into close contact with the back surface side of the printing mask 1, and printing blur can be prevented and printing quality can be improved.

  Further, by providing the reinforcing member 62 on the printing mask 1, it is necessary to process the table 8 on which the substrate w is placed. This processing operation has a depth sufficient to accommodate the reinforcing member 62. It is only necessary to form the groove 81, and the above-described effects can be obtained at low cost. That is, according to the present invention, the reinforcing member 62 is not reinforced by the reinforcing member 62 but the reinforcing member 62 is arranged on the back side of the mask body 6 based on the novel idea of forming the groove 81 in the table 8. Thus, the reinforcing effect of the mask body 6 is further enhanced to improve the printing quality.

  The arrangement of the reinforcing member 62 is not particularly limited as long as it is on the back side of the mask body 6. For example, the elongated reinforcing member 62 may be arranged so as to intersect along the diagonal line or the center line of the rectangular back surface of the mask main body 6, and the direction of tension applied to the collar 4 is multidirectional (for example, 4 Direction) is particularly effective. FIG. 6 shows an example in which two reinforcing members 62, 62 are arranged in a cross shape.

  On the other hand, if the acting direction of the tension on the brazing material 4 is two straight directions as in the present embodiment, or if the tension in each direction is strong or weak even in multiple directions, the deformation of the mask body 6 is performed. By arranging the reinforcing member 62 so that the longitudinal direction substantially coincides with the tension acting direction in which the mask is likely to occur, it is possible to reliably prevent the mask body 6 from being raised due to the tension of the saddle member 4. The number of reinforcing members 62 is not particularly limited, but at least one reinforcing member 62 is preferably arranged so as to pass through the center of the back surface of the mask body 6.

  Further, since the reinforcing member 62 includes the rib 621 extending in the direction orthogonal to the back surface of the mask body 6, the reinforcing strength can be increased. Examples of the cross-sectional shape of the reinforcing member 62 having such ribs include a rectangular parallelepiped shape, a square shape, an E shape, an L shape, and a T shape in addition to the U shape of the present embodiment. .

It is a surface view of the mask for printing which concerns on one Embodiment of this invention. It is a reverse view of the printing mask shown in FIG. It is AA sectional drawing of FIG. It is a principal part front view of the mask for printing shown in FIG. It is a process side view for demonstrating the printing method to the board | substrate which concerns on one Embodiment of this invention. It is a back view of the mask for printing which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printing mask 2 Frame body 4 Brazing material 41 Opening area 6 Mask main body 61 Pattern hole 62 Reinforcement member 621 Rib 8 Table 8a Mounting surface 81 Groove part

Claims (3)

A frame, a collar provided on the frame, and a plate-like mask body bonded to the collar; the collar is fixed to the frame in a state in which tension is applied; A mask for printing in which an opening region is formed so that a pattern hole of the mask body is exposed,
The mask body includes a long reinforcing member on the back surface side in contact with the printing surface ,
The printing mask according to claim 1, wherein the reinforcing member includes a rib extending in a direction orthogonal to a back surface of the mask body . The printing mask according to claim 1, wherein the reinforcing member is disposed so that a direction in which a tension acts on the brazing material and a longitudinal direction thereof substantially coincide with each other. A method for printing a substrate using a printing mask according to claim 1 or 2,
Placing the substrate on the placing surface of the table in which the groove is formed;
Arranging the printing mask so that the reinforcing member is accommodated in the groove, and bringing the lower surface of the printing mask into close contact with the substrate;
Supplying a printing material onto the printing mask, and applying the printing material to the substrate through the pattern holes.

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