JP2001080033A - Method for transferring pattern - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for transferring a pattern having high position accuracy and shape accuracy and a relatively easy work. SOLUTION: A sheet frame 10 is disposed oppositely to a work 1, and a sheet-like plate 5 is stretched over its lower side. The plate 5 is made of a steel base sheet and a hard rubber surface layer. The frame 10 is constituted of a rectangular outer frame 11, a stainless steel mesh fixed sheet 13, and an attracting block 16 made of a permanent magnet having flexibility. Many through holes are formed at the sheet 13 along an inner periphery of the frame 11. The block 16 is fixed to an upper surface of the sheet 13 along the inner periphery of the frame 11, and a groove-like vent route is formed at its lower surface so as to cover above the holes. The plate 5 is fixed to a lower surface of the sheet 13 by a magnetic force of the block 16 and vacuum sucking through the holes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of transferring a pattern onto a surface of a flat work, and more particularly to a method suitable for printing or molding which requires high positional accuracy and shape accuracy. . Further, the present invention relates to a structure of a sheet frame used as a means for holding a sheet-like plate when performing the pattern transfer method.

[0002]

2. Description of the Related Art As a conventional technique similar to the pattern transfer method of the present invention, there is a screen printing method or an offset screen printing method (for example, JP-A-4-364953). In these methods, a plate or offset screen provided with ink is held close to the front of a flat work (substrate to be printed) through a slight clearance, and the plate or offset screen is placed on the work using a squeegee. Then, the pattern is formed by transferring the ink pattern onto the surface of the work.

(Problems of the prior art) When forming a fine concavo-convex pattern by using a printing method in the production of electronic parts and the like, a paste-like material having curability and relatively strong adhesive strength (hereinafter simply referred to as “paste material”). Paste) is used as ink.

In such a case, if the clearance between the plate or the offset screen and the work is set too narrow, it becomes difficult to separate the plate or the offset screen from the surface of the work while being pressed against the surface of the work. This makes it difficult to continue the operation of the printing press. On the other hand, when the clearance is set too large, the deformation of the plate or the offset screen when the plate is squeezed with the squeegee becomes large, and the positional accuracy and the shape accuracy of the image printed on the surface of the work are reduced, and , And may also shorten the life of the plate or offset screen.

[0005] Such problems are affected by many conditions such as the area of the work, the material of the work, the type of ink (or paste used as ink), and the set values of various operation parameters. A high level of skill is required when operating the device.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional pattern transfer method, and it is an object of the present invention to provide a high position accuracy and a high shape accuracy and a high workability. Is to provide a relatively easy pattern transfer method.

[0007]

According to the pattern transfer method of the present invention, a two-dimensional pattern is formed on a flat work held on a table by ink applied on the surface or unevenness formed on the surface. In the pattern transfer method of transferring a pattern using a sheet-shaped plate,
A first preparation step of preparing a composite sheet in which a surface layer portion made of an elastic material is laminated on a base sheet made of a ferromagnetic material as the sheet-shaped plate, and an outer frame, which is stretched in a longitudinal direction below the outer frame. A fixed sheet made of a non-magnetic material having a plurality of through holes penetrating from the upper surface to the lower surface along the inner periphery of the outer frame, and being fixed to the upper surface side of the fixed sheet along the inner periphery of the outer frame. A second preparation step of preparing a seat frame having a grooved ventilation path formed on the lower surface so as to cover above the through-hole and having a flexible permanent magnet suction block; and The first step of holding on a table, the second step of holding the sheet-shaped plate on the lower surface of the fixed sheet by the magnetic force of the suction block, and depressurizing the inside of the through-hole through the ventilation path, Place the back of the sheet-shaped plate on the fixed sheet A third step of adhering the the lower surface,
The work, the fourth step of approaching the surface of the sheet-shaped plate and holding the sheet-shaped plate in a parallel position, and pressing the fixed sheet using a press roller from above, the sheet A fifth step of bringing the surface of the plate-shaped plate into close contact with the work, and a sixth step of pressing the inside of the through-hole through the ventilation path and separating the back surface of the sheet-shaped plate from the lower surface of the fixed sheet, And a seventh step of peeling the surface of the sheet-like plate from the work.

According to the pattern transfer method of the present invention, at the time of pattern transfer, the sheet-shaped plate is held in close contact with the lower surface of the fixed sheet using a suction block, and the sheet-shaped plate is transferred from a subsequent work. Is performed in a separate process. As a result, during pattern transfer,
Since the clearance between the surface of the work and the sheet-shaped plate can be set narrow, when the press roller is rolled on the upper surface of the fixed sheet, the elastic deformation of the sheet-shaped plate can be reduced. it can. As a result, it is possible to realize high accuracy regarding positional accuracy and shape accuracy by transfer.

In the case where the adhesive force between the sheet-shaped plate and the work is strong and the clearance between the sheet-shaped plate and the work at the stage before the pattern transfer is relatively large, the penetration is prevented. By stopping the pressure reduction in the hole and returning the inside of the through hole to the atmospheric pressure, the lower surface of the fixed sheet is separated from the back surface of the sheet-like plate by the elastic restoring force of the fixed sheet itself. In such a case, it is not necessary to pressurize the inside of the through hole in the sixth step of the above steps.

Further, depending on conditions such as the size or weight of the sheet-shaped plate, the sheet-shaped plate can be brought into close contact with the lower surface of the fixed sheet only by magnetic force.
In such a case, the third step of the above steps can be omitted.

Further, the size or weight of the sheet-shaped plate, the adhesive force between the sheet-shaped plate and the work, the clearance between the sheet-shaped plate and the work in a stage before pattern transfer, and other factors. Depending on conditions, both the third step and the sixth step among the above steps can be omitted. In such a case, it is not necessary to provide a through hole in the fixing sheet, and it is not necessary to provide a ventilation path on the lower surface of the suction block.

[0012]

FIG. 1 shows a schematic structure of a main part of an apparatus used for a pattern transfer method according to the present invention.
FIG. 2 shows an enlarged view of a portion A in FIG.

A flat work 1 (substrate to be printed) is held on a table 2. A sheet frame 10 is arranged above the table 2 so as to face the upper surface of the table 2, and a sheet-like plate 5 is stretched below the sheet frame 10. This sheet-shaped plate 5 is made of a steel base sheet 6.
Is a composite sheet in which a hard rubber surface layer 7 is laminated on the upper side (the lower side in FIG. 1), and the surface (the lower side in FIG. 1) of the composite sheet is coated with a predetermined amount of ink provided in the preceding step. A two-dimensional pattern is formed.

The seat frame 10 has a rectangular outer frame 11,
It is composed of a fixing sheet 13 and a suction block 16. The fixing sheet 13 is a sheet made of stainless steel mesh having a thickness of 0.05 mm, and is stretched under the outer frame 11 in the longitudinal direction (the left-right direction in FIG. 1). As shown in FIG. 2, the fixing sheet 13 has a large number of through holes 14 penetrating from the upper surface to the lower surface along the inner periphery of the outer frame 11. The suction block 16 is made of a flexible permanent magnet, and is fixed to the upper surface of the fixing sheet 13 along the inner periphery of the outer frame 11. As shown in FIG. 2, a groove-shaped ventilation path 17 is formed on the lower surface of the suction block 16 so as to cover the upper part of the through hole 14.

As shown in FIG. 2, the sheet-shaped plate 5 is attracted to the lower side of the fixed sheet 13 by a magnetic force acting from a suction block 16 via the fixed sheet 13. Further, the inside of the through-hole 14 is depressurized through the ventilation path 17 formed on the lower surface of the suction block 16, so that the lower surface of the fixing sheet 13 and the rear surface of the sheet-shaped plate 5 adhere to each other over the entire surface, and are fixed. The sheet-shaped plate 5 is firmly fixed to the sheet 13.

At a stage immediately before printing, as shown in FIG. 1, the sheet-like plate 5 is held in a state of facing the work 1 via a slight clearance G. In this state, the press roll 8 is rolled on the upper surface of the fixed sheet 13 to bring the surface (lower surface) of the sheet-shaped plate 5 into close contact with the surface (upper surface) of the work 1.

Next, when the inside of the through hole 14 is pressurized through the ventilation path 17 formed on the lower surface of the suction block 16,
As shown in FIG. 3, the sheet-like plate 5 is transferred onto the work 1 while being separated from the lower surface of the fixed sheet 13.

Next, as shown in FIG. 4, the sheet-like plate 5 is peeled off from the work 1 using a separating device (not shown). Thus, printing on the work 1 is completed.

According to the above-described method, as shown in FIG. 1, when the sheet-shaped plate 5 is held in a state of facing the work 1, the gap between the surface of the sheet-shaped plate 5 and the surface of the work 1 is maintained. Can be set to a value of about 0.5 to 1 mm (provided that the size of the work is 500 mm × 5 mm).
In the case of about 00 mm). The value of this clearance is about 1/3 to about 1/3 as compared with the case of printing the same size work using the conventional offset screen printing method.
It is as small as 1/5. Therefore, according to the above-described method, it is possible to realize high accuracy in positional accuracy and shape accuracy of an image printed on the surface of a work.

FIG. 5 shows another example of a sheet-like plate used in the pattern transfer method according to the present invention.

In this example, the sheet-shaped plate 61 is a kind of intaglio, and is composed of a steel base sheet 62 and a surface layer 63 made of hard silicone rubber. Surface section 63
A two-dimensional pattern is formed on the surface by a number of minute grooves 64.

The groove 64 is filled with a curable paste-like ink, and the ink is transferred onto a glass substrate (work) according to the same procedure as described above. A two-dimensional pattern can be formed with fine projections.

Using this method, for example, a width of 30 μm,
When a two-dimensional pattern is formed with fine protrusions having a height of about 160 μm, the thickness T1 of the base sheet 62 is 0.1 to 0.1 μm.
About 0.5 mm, the thickness T2 of the surface layer 63 is 0.1 to
About 0.7 mm is appropriate.

FIG. 6 shows still another example of a sheet-like plate used in the pattern transfer method according to the present invention.

In this example, the sheet-shaped plate 71 is a kind of mold and is composed of a steel base sheet 72 and a hard fluororesin surface layer 73. A two-dimensional pattern is formed on the surface of the surface layer 73 by a large number of minute projections 74.

Using a composite plate having a clay-like soft layer laminated on the surface thereof as the work 1 and transferring a two-dimensional pattern of the projections 74 to the surface of the soft layer according to the same procedure as described above. Accordingly, a two-dimensional pattern can be formed with fine grooves on the surface of the composite plate.

Using this method, for example, a width of 200 μm
When a two-dimensional pattern is formed with fine projections having a height of about 150 μm and a height of about 150 μm, the thickness T3 of the base sheet 72 is set to 0.1 mm.
The thickness T4 of the surface portion 73 is about 0.1 to 0.5 mm,
About 0.3 mm is appropriate.

In the above example, the fixing sheet 13
When adsorbing the sheet-shaped plate 5 on the lower surface of the outer frame 11, the inside of the through-hole 14 formed along the inner periphery of the outer frame 11 is depressurized, so that the sheet-shaped plate 5 Then, the sheet-shaped plate 5 is separated from the fixing sheet 13 by pressurizing the inside of the through-hole 14.

However, when the magnetic force by the suction block 16 is considerably weaker than the adhesive force between the sheet-like plate 5 and the work 1, the pressure reduction in the through-hole 14 is stopped and the through-hole 14 is stopped.
By returning the inside to the atmospheric pressure, the lower surface of the fixed sheet 13 is separated from the back surface of the sheet-shaped plate 5 by the elastic restoring force of the fixed sheet 13 itself. Therefore, in such a case, it is not necessary to pressurize the inside of the through-hole 14 when separating the sheet-like plate 5 from the fixing sheet 13.

Further, the size of the work 1 is, for example, 30
When it is relatively small, such as 0 mm × 300 mm or less, the value of the clearance G between the surface of the sheet-shaped plate 5 and the work 1 can be set to about 0.5 mm. In such a case, even if the sheet-shaped plate 5 is not vacuum-sucked to the fixed sheet 13, the pressing roller 8
Of the sheet-shaped plate 5 relative to the fixed sheet 13 when the roller is rolled can be suppressed to be small. Therefore, in such a case, it is not necessary to provide the through holes 14 in the fixing sheet 13, and it is not necessary to provide the ventilation path 17 on the lower surface of the suction block 16.

[0031]

According to the pattern transfer method of the present invention, the sheet-like plate is attracted to and held on the lower surface of the fixed sheet, so that the sheet-like plate and the work between the stage immediately before the pattern transfer are held. The clearance can be suppressed to a value of about 1/3 to 1/5 as compared with the conventional screen printing method or offset screen printing method. As a result, the positional accuracy and shape accuracy of the transferred pattern are greatly improved.

Further, according to the pattern transfer method of the present invention, since the holding of the sheet-like plate can be performed relatively easily by using the fixed sheet, the operation procedure of the apparatus can be simplified. .

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of an apparatus used in a pattern transfer method according to the present invention.

FIG. 2 is an enlarged sectional view of a portion A in FIG.

FIG. 3 is a view showing a state in which the plate is transferred onto the work in a state in which the plate is in close contact with the work in the pattern transfer method according to the present invention.

FIG. 4 is a view showing a state in which the plate is peeled off from the surface of the work in the pattern transfer method according to the present invention.

FIG. 5 is a partial cross-sectional view showing the structure of a sheet-like plate used in another example of the pattern transfer method according to the present invention.

FIG. 6 is a partial cross-sectional view showing the structure of a sheet-like plate used in another example of the pattern transfer method according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Work, 2 ... Table, 5 ... Sheet-shaped plate, 6 ... Base sheet, 7 ... Surface part, 8 ... Press roller, 10 ... Seat frame, 11 ... Outer frame, 13 ... Fixed sheet, 14 ... Through hole, 16 ... Suction block, 17 ... Ventilation path, 61 ... Sheet plate, 62 ... Base sheet, 63: surface layer, 64: groove, 71: sheet-like plate, 72: base sheet, 73: surface layer, 74: protrusion.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shogo Serizawa 2068-3 Ooka, Numazu City, Shizuoka Prefecture F-term in Toshiba Machine Techno Co., Ltd. 2C035 AA06 AA08 FC04 FC10 FD01 FD25 FF01 FF04 FF22 FF26 2H113 AA01 AA05 BA21 BA22 BB09 BB22 CA17 FA28

Claims (8)

[Claims] 1. A pattern is transferred to a plate-like work held on a table using a sheet-like plate on which a two-dimensional pattern is formed by ink provided on the surface or irregularities formed on the surface. In the pattern transfer method, a first preparation step of preparing a composite sheet in which a surface layer portion made of an elastic material is laminated on a base sheet made of a ferromagnetic material as the sheet-shaped plate, A fixing sheet made of a non-magnetic material having a plurality of through-holes extending from the upper surface to the lower surface along the inner periphery of the outer frame, and a fixing sheet formed along the inner periphery of the outer frame. A second preparation step of preparing a seat frame provided with a flexible permanent magnet suction block, which is fixed to the upper surface side and has a groove-shaped ventilation path formed on the lower surface so as to cover above the through hole; And the wa A first step of holding the workpiece on a table, a second step of holding the sheet-like plate on the lower surface of the fixed sheet by the magnetic force of the suction block, and passing the inside of the through-hole through the ventilation path. A third step of reducing the pressure and bringing the back surface of the sheet-shaped plate into close contact with the lower surface of the fixed sheet; and bringing the work closer to the surface of the sheet-shaped plate, and in a posture parallel to the sheet-shaped plate. And a fourth step of holding with, pressing from above the fixed sheet using a press roller,
A fifth step of bringing the surface of the sheet-shaped plate into close contact with the work; and a sixth step of pressing the inside of the through-hole through the ventilation path and separating the back surface of the sheet-shaped plate from the lower surface of the fixed sheet. And a seventh step of peeling off the surface of the sheet-like plate from the work. 2. A pattern is transferred to a plate-like work held on a table using a sheet-like plate on which a two-dimensional pattern is formed by ink provided on the surface or irregularities formed on the surface. In the pattern transfer method, a first preparation step of preparing a composite sheet in which a surface layer portion made of an elastic material is laminated on a base sheet made of a ferromagnetic material as the sheet-shaped plate, A fixing sheet made of a non-magnetic material having a plurality of through-holes extending from the upper surface to the lower surface along the inner periphery of the outer frame, and a fixing sheet formed along the inner periphery of the outer frame. A second preparation step of preparing a seat frame provided with a flexible permanent magnet suction block, which is fixed to the upper surface side and has a groove-shaped ventilation path formed on the lower surface so as to cover above the through hole; And the wa A first step of holding the workpiece on a table, a second step of holding the sheet-like plate on the lower surface of the fixed sheet by the magnetic force of the suction block, and passing the inside of the through-hole through the ventilation path. A third step of reducing the pressure and bringing the back surface of the sheet-shaped plate into close contact with the lower surface of the fixed sheet; and bringing the work closer to the surface of the sheet-shaped plate, and in a posture parallel to the sheet-shaped plate. And a fourth step of holding with, pressing from above the fixed sheet using a press roller,
A fifth step of bringing the surface of the sheet-shaped plate into close contact with the work; a sixth step of returning the inside of the through-hole to atmospheric pressure and separating the back surface of the sheet-shaped plate from the lower surface of the fixed sheet; A seventh step of peeling off the surface of the plate from the work. 3. A pattern is transferred to a plate-like work held on a table using a sheet-like plate on which a two-dimensional pattern is formed by ink provided on the surface or irregularities formed on the surface. In the pattern transfer method, a first preparation step of preparing a composite sheet in which a surface layer portion made of an elastic material is laminated on a base sheet made of a ferromagnetic material as the sheet-shaped plate, A fixing sheet made of a non-magnetic material having a plurality of through-holes extending from the upper surface to the lower surface along the inner periphery of the outer frame, and a fixing sheet formed along the inner periphery of the outer frame. A second preparation step of preparing a seat frame provided with a flexible permanent magnet suction block, which is fixed to the upper surface side and has a groove-shaped ventilation path formed on the lower surface so as to cover above the through hole; And the wa A first step of holding a workpiece on a table, a second step of holding the sheet-shaped plate on the lower surface of the fixed sheet by the magnetic force of the suction block, and a surface of the sheet-shaped plate. And a third step of holding the sheet-shaped plate in a parallel position, and pressing the fixed sheet using a press roller,
A fourth step of bringing the surface of the sheet-shaped plate into close contact with the work; and a fifth step of pressing the inside of the through-hole through the ventilation path and separating the back surface of the sheet-shaped plate from the lower surface of the fixed sheet. And a sixth step of peeling off the surface of the sheet-shaped plate from the work. 4. A pattern is transferred to a plate-like work held on a table using a sheet-like plate on which a two-dimensional pattern is formed by ink provided on the surface or irregularities formed on the surface. In the pattern transfer method, a first preparation step of preparing a composite sheet in which a surface layer portion made of an elastic material is laminated on a base sheet made of a ferromagnetic material as the sheet-shaped plate, A fixed sheet made of a non-magnetic material stretched in the longitudinal direction, and a flexible permanent magnet suction block fixed to the upper surface side of the fixed sheet along the inner periphery of the outer frame. A second preparation step of preparing a frame, a first step of holding the work on a table, and a second step of holding the sheet-like plate on the lower surface of the fixed sheet by the magnetic force of the suction block. And a third step of bringing the work closer to the surface of the sheet-shaped plate and holding the work in a posture parallel to the sheet-shaped plate, and pressing the fixed sheet using a press roller from above. Thereby, a fourth step of bringing the surface of the sheet-shaped plate into close contact with the work and separating the back surface of the sheet-shaped plate from the lower surface of the fixed sheet, and peeling the surface of the sheet-shaped plate from the work A pattern transfer method, comprising: a fifth step. 5. A composite sheet comprising a steel base sheet and a surface layer made of hard rubber or plastics laminated on a steel base sheet as the sheet-shaped plate. The pattern transfer method described in any of the above. 6. The fixing sheet according to claim 1, wherein a sheet made of stainless steel mesh or perforated metal sheet and having a thickness of 0.01 mm or more and 0.3 mm or less is used as the fixing sheet. Or the pattern transfer method described above. 7. When transferring a pattern to a flat work using a sheet-like plate on which a two-dimensional pattern is formed by ink provided on the surface or irregularities formed on the surface, A seat frame used for holding a plate, comprising: an outer frame; and a plurality of through holes extending longitudinally below the outer frame and penetrating from an upper surface to a lower surface along an inner periphery of the outer frame. A fixing sheet made of a non-magnetic material and having a groove-shaped ventilation path formed on the upper surface side of the fixing sheet along the inner periphery of the outer frame so as to cover above the through hole on the lower surface, And a suction block made of a permanent magnet having flexibility. 8. When a pattern is transferred onto a flat work using a sheet-like plate on which a two-dimensional pattern is formed by ink provided on the surface or irregularities formed on the surface, the sheet-like form is transferred. A seat frame used to hold a plate, an outer frame, a fixing sheet made of a non-magnetic material stretched longitudinally below the outer frame, and fixed along an inner periphery of the outer frame. And a suction block made of a permanent magnet having flexibility and fixed to an upper surface side of the seat.