JPH09142053A - Metal mask plate for screen printing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect the hole pitch of printing pattern holes (plate pattern section) of a metal mask from slipping by excessive stretching in the stretch formed by the driving method. SOLUTION: An area 9 to be clamped is provided on the four side outer peripheries of a printing pattern hole area 4 of a metal mask base 1 and the area 9 to be clamped is pressed into a channel 10 of a printing plate frame 2 and clamped thereon by a pressing tool 3. The area 9 to be clamped is formed into the mesh shape and provided with the tension adjustment function of rich extensibility more than that of the printing pattern hole area 4. Therefore, when the metal mask base 1 is frame stretched by fitting the pressing tool 3, the stretch is absorbed and relaxed on the area 9 to be clamped, and the stretch of the printing pattern hole area 4 can be reduced to protect the printing pattern hole from the slip of the hole pitch and distortion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, ICs and Ls.
The present invention relates to an electroformed metal mask plate suitably used for screen printing of SI printed wiring and the like, and more particularly to improvement of a frame tensioning means for the metal mask plate.

[0002]

2. Description of the Related Art Frame tensioning of a metal mask plate for printing of this type is generally performed by a driving method or an adhesion method. In the bonding method, it takes time to dry the adhesive, and it is troublesome to replace the metal mask, and there is also a bonding method using tape, but it requires skill in sticking the tape. In that respect, the driving method is enough to drive the metal mask on all four sides into the grooves of the plate frame and fix it, so the frame tensioning work can be done more efficiently than the adhesive method, and the metal mask can be replaced. Can be done easily.

[0003]

However, in the driving method, tension is applied to the metal mask by driving the retainer into the groove of the plate frame. Therefore, the metal mask is easily stretched or loosened due to the driving condition. Depending on the metal mask printing pattern hole (print pattern part)
Problems such as deviation of the hole pitch and distortion of the hole shape were likely to occur.

An object of the present invention is to solve the above problems, and it is an object of the present invention to provide a metal mask plate for screen printing, which can prevent the deviation or distortion of the hole pitch of the print pattern holes of the metal mask during frame tensioning. .

[0005]

According to the present invention, as illustrated in FIG. 1, a print pattern hole region 4 of a metal mask substrate 1 is formed.
The sandwiched area 9 formed on the outer periphery is the groove 10 of the plate frame 2.
In the screen printing metal mask plate which is sandwiched and fixed between the press-fitting tool 3 and the pressing tool 3 fitted therein, the sandwiched region 9 is formed in a state of being more extensible than the print pattern hole region 4. It is characterized by being

[0006]

[Function] The metal mask substrate 1 is fitted with the presser foot 3 by fitting.
Even if the sheet is excessively stretched, the extension is absorbed and relaxed in the sandwiched region 9, so that the extension in the print pattern hole region 4 can be reduced accordingly.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) A first embodiment of the metal mask plate for screen printing according to the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view of a metal mask plate obtained by sticking a metal mask substrate to a plate frame, FIG. 2 is a perspective view of the metal mask substrate, and FIG. 3 is an exploded perspective view of the plate frame and the pressing tool. Reference numeral 1 is a metal mask substrate, 2 is a plate frame, and 3 is a retainer used together with the plate frame 2.

In FIG. 2, the metal mask substrate 1 is made of Ni.
Alternatively, an Ni-Co alloy electroformed product (for example, 80 μm)
Thickness), a desired printing pattern hole region 4 is provided in the center thereof, and positioning holes 5 and mounting holes 6 for positioning and fixing the printing pattern hole region 4 on the plate frame 2 are provided at the outermost circumferences on all four sides of the printing pattern hole region 4.
A fixing region 7 in which and are alternately provided is provided. A sandwiched region 9 for sandwiching between the plate frame 2 and the pressing tool 3 is provided between the print pattern hole region 4 and the fixed region 7 of the metal mask substrate 1 adjacent to the fixed region 7. . The sandwiched region 9 is formed in a cross-mesh shape so that the sandwiched region 9 has a tension adjusting function which is more expandable than the print pattern hole region 4. The print pattern hole region 4, the sandwiched region 9, the positioning hole 5 and the mounting hole 6 are formed at the same time when the metal mask substrate 1 is electroformed with Ni or Ni—Co alloy.

1 and 3, the plate frame 2 is an aluminum or zinc die-cast product in which a vertical frame 2a having a rectangular cross section and a horizontal frame 2b are combined into a rectangular frame shape.
A groove 10 for fixing the sandwiched region 9 of the metal mask substrate 1 is provided on each surface of the horizontal frame 2b, and positioning pins 11 and screw holes 12 are alternately provided on the outside of the groove 10 to provide a rear surface. Is provided with a meat stealing portion 13 for reducing the overall weight. The presser foot 3 is an aluminum or zinc die cast product like the plate frame 2,
Four strips are provided and have a strip-shaped flat plate portion 3a that is stacked on the vertical frame 2a and the horizontal frame 2b, and a protruding portion 3b that is provided on the back surface side of the flat plate portion 3a and that is fitted into the groove 10 of the plate frame 2. A pin hole 14 and a screw through hole 15 corresponding to the positioning pin 11 and the screw hole 12 of the plate frame 2 are provided outside the protruding portion 3b of the flat plate portion 3a. The screw through hole 15 is provided with a counterbore 15a so that the head of the screw 16 may sink. A corner 2c where the surface and the inner surface of the plate frame 2 intersect, and a presser foot 3
The corners 2c and 3c are rounded so that the metal mask substrate 1 is not damaged by the corner 3c where the back surface and the inner surface of the flat plate portion 3a intersect.

In order to frame the metal mask substrate 1, the metal mask substrate 1 is tensioned in four directions, and the fixing regions 7 and the sandwiched regions 9 on the four sides are placed on the surface of the plate frame 2, and the metal mask substrate 1 When the positioning hole 5 is fitted to the positioning pin 11 of the plate frame 2, a state in which the mounting hole 6 is aligned with the screw hole 12 and the held region 9 is aligned with the groove 10 is obtained. Thus, the pressing tool 3 is placed on the fixed area 7 and the sandwiched area 9 of the metal mask substrate 1 on the surface of the plate frame 2,
The pin hole 14 of the retainer 3 is fitted to the tip of the positioning pin 11, and the pinched area 9 is formed in the groove 1 by the protrusion 3b.
0, and the screw 16 is passed from the screw through hole 15 through the mounting hole 6 and screwed into the screw hole 12,
Then, the metal mask substrate 1 is fixed in a tension state with a desired tension. At this time, when the metal mask substrate 1 is overtensioned by the retainer 3, the metal mask substrate 1 extends in the cross mesh-shaped sandwiched region 9 portion, so that the extension spreads to the print pattern hole region 4 as much as possible. Can be suppressed.

The cross-sectional shape of the groove 10 of the plate frame 2 may be formed in an isosceles triangular shape so that the angle α and the angle β shown in FIG. 1 are equal, or may be formed in a rectangular shape as shown in FIG. As shown in FIG. 1, it is preferable that the angle α is formed in a triangular shape that is larger than the angle β, since the tensile stress on the print pattern hole region 4 side can be absorbed and relaxed more effectively. Of course,
It goes without saying that, when the groove 10 is formed in any cross-sectional shape, the protrusion 3b of the retainer 3 is formed in a triangular cross-section, a square cross-section, or a circular arc cross-section in accordance with the cross-sectional shape of the groove 10. .

(Other Embodiments) Instead of forming the sandwiched region 9 in the cross-mesh shape, it can be carried out as in the second to eleventh embodiments shown in FIGS. 5 to 15, respectively. Good. However, each embodiment is the same as that of the first embodiment except for the sandwiched region 9. In the second embodiment shown in FIGS. 5 and 6, the lightning-shaped thin wire 17 connects the outer peripheral portion of the print pattern hole area 4 and the fixing area 7, and the pores are formed between the adjacent thin wires 17 and 17. 19 are provided. One lightning bolt-shaped thin wire 17 is a bending line A, B _{1 in} a direction different from the tension direction C when tensioning the frame,
Linked by B _2, the bending lines A and bend lines B ₁ and B ₂ it is easily extended by two bent portions intersecting. The four corners 1c of the metal mask substrate 1 are cut off obliquely, and a corner hole 20 larger than the fine hole 19 is provided at a corner where the vertically held region 9 and the horizontally held region 9 intersect at each corner. It is provided. A half notch 21 is formed at the end of the fixed region 7 at each corner. The half notch 21 is in a connected state until it is frame-tensioned so as not to be deformed at the location, and is cut off after frame-tensioning.

The thin wire 17 may be of the third to sixth embodiments shown in FIGS. 7 to 10 instead of the lightning bolt shape. In the third embodiment shown in FIG. 7, the V-shaped thin wires 22a and the inverted V-shaped thin wires 22b are provided alternately through the pores 23. When the frame is stretched, the angle of the bent portion of the V-shaped thin wire 22a and the angle of the bent portion of the inverted V-shaped thin wire 22b can be expanded to obtain an extension amount. Thin line 2 in the shape of a character opposite to the connection point P with the print pattern hole area 4 side
An extension force is applied in a direction opposite to a connection point P'of the print pattern hole region 4 side of 2b, and the resultant force causes the print pattern hole region 4 to coincide with a predetermined pulling direction. As the thin wires 22a (22b), all the thin wires 2
When the extension force is applied under the condition that the 2a (22b) are continuously arranged in the same direction, the print pattern hole region 4 tends to have a torsional distortion such that it rotates in one direction. The thin wire 22a having a square shape and the thin wire 22 having a reverse shape
By alternately arranging b and b, it is possible to suppress such a defective tendency. When the bent portions of the V-shaped thin wire 22a and the inverted V-shaped thin wire 22b are provided at positions corresponding to the protrusions 3b of the presser foot 3, the bent portions expanded and deformed when the frame tensioning is completed. Since the spread angle can be clamped and maintained, it is possible to reduce an unnecessary angle change that causes slack of the plate even with respect to external force applied during printing, for example, the printing pressure of the squeegee.

In the fourth embodiment shown in FIG. 8, an S-shaped thin wire 24 is provided.
Are arranged in rows through the pores 25. In the fifth embodiment shown in FIG. 9, C-shaped thin wires 29a and inverted C-shaped thin wires 29b are alternately arranged with pores 30 in between. These 4th and 5th
In the embodiment, since the thin wires 24, 29a, 29b are formed in a curved shape, it is possible to secure a sufficient length capable of being stretched and deformed, which means that it is not necessary to narrow the thin wire width. This is advantageous because it can avoid the accident of cutting thin wires.
In the sixth embodiment shown in FIG. 10, the horizontally-inverted S-shaped thin wires 26a and the horizontally-inverted inverted S-shaped thin wires 26b are alternately arranged through the pores 27. With this structure, the thin wire 26b returns to a U-turn shape, so that the thin wire length can be made longer than that of each of the above-described embodiments. Incidentally, the third to fifth embodiments
In the embodiment, each thin wire 22a (22b, 24, 29a, 29)
The line connecting the connection point P with the print pattern hole area 4 side and the connection point Q with the fixed area 7 side in b) is set to be parallel to the pulling direction when the frame is stretched. Fine line 2 in the sixth embodiment
6a (26b) print pattern hole area 4 side connection point P
The line connecting the connection point Q with the fixed region 7 side is set so as to intersect the pulling direction when the frame is stretched.

In the seventh embodiment shown in FIG. 11, long holes 31 are provided in a row in the pulling direction C when the frame is tensioned. In the eighth embodiment shown in FIG. 12, many fine holes 32 are formed. In this case, the fine holes 32 have a small opening amount per unit area in the center S and increase in the inward and outward directions from the center S, so that the top 3e of the protrusion 3b having a V-shaped cross section of the retainer 3 (see FIG. 3). ) Is less likely to stretch than the portion where the hypotenuse portion 3f (see FIG. 3) hits to maintain the holding strength. In the ninth embodiment shown in FIG. 13, the thickness of the printed pattern hole region 4 is made thinner than the plate thickness of the printed region 4 so that the printed pattern hole region 4 can be easily stretched. In the tenth embodiment shown in FIG. 14, the fixed region 7 and the sandwiched region 9 are separately formed of a material softer than the plate material of the print pattern hole region 4, and this is superposed on one side of the outer peripheral portion of the print pattern hole region 4. Unify. For example, Ni is used for the plate material of the print pattern hole region 4 and Cu is used for the plate members of the fixed region 7 and the sandwiched region 9, and both are polymerized and integrated by a clad method or the like. In addition, as a method of polymerizing and integrating, as in the eleventh embodiment shown in FIG. 15, the fixed region 7 and the sandwiched region 9 are pressed with a copper plate or the like, and the press pattern hole region 4 is made into Ni or the like on this press material. Alternatively, it may be electroformed integrally. In any of the embodiments, the sandwiched region 9 extends during the frame tensioning, but after the frame tensioning is completed, the clamped region 9 is sandwiched so that the entire clamped region 9 is hidden. It is preferable to prevent the stretched region 9 from being stretched by the repeated squeegee force during printing.

[0016]

According to the present invention, when the metal mask substrate 1 is framed by the fitting of the retainer 3, the expansion is absorbed and relaxed in the sandwiched region 9 portion, so that the expansion in the print pattern hole region 4 is achieved. It is possible to prevent the deviation and distortion of the printing pattern holes and to obtain a highly accurate frame-clad metal mask plate.

[Brief description of the drawings]

FIG. 1 is a sectional view of a metal mask plate of a first embodiment.

FIG. 2 is a perspective view of a metal mask substrate of the first embodiment.

FIG. 3 is an exploded perspective view of a plate frame and a pressing tool according to the first embodiment.

FIG. 4 is a cross-sectional view showing a modified example of the plate frame and the retainer of the first embodiment.

FIG. 5 is an enlarged perspective view of a part of the metal mask substrate of the second embodiment.

FIG. 6 is an enlarged plan view of a part of the metal mask substrate of the second embodiment.

FIG. 7 is an enlarged plan view of a part of the metal mask of the third embodiment.

FIG. 8 is an enlarged plan view of a part of the metal mask substrate of the fourth embodiment.

FIG. 9 is an enlarged plan view of a part of the metal mask substrate of the fifth embodiment.

FIG. 10 is an enlarged plan view of a part of the metal mask substrate of the sixth embodiment.

FIG. 11 is an enlarged perspective view of a part of the metal mask substrate of the seventh embodiment.

FIG. 12 is an enlarged perspective view of a part of the metal mask substrate of the eighth embodiment.

FIG. 13 is an enlarged cross-sectional view of a part of the metal mask substrate of the ninth embodiment.

FIG. 14 is an enlarged cross-sectional view of a part of the metal mask substrate of the tenth embodiment.

FIG. 15 is an enlarged cross-sectional view of a part of the metal mask substrate of the eleventh embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal mask substrate 2 Plate frame 3 Holding tool 4 Printing hole pattern area 7 Fixing area 9 Clamped area 10 Groove

Claims (1)

[Claims] 1. A clamped region 9 formed on the outer periphery of a print pattern hole region 4 of a metal mask substrate 1 is clamped and fixed between a groove 10 of a plate frame 2 and a holding tool 3 fitted therein. In the screen printing metal mask plate, the sandwiched region 9 is formed in a state of being more extensible than the print pattern hole region 4.