JP2003341010A - Screen printing machine and screen printing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a screen printing machine capable of applying a hole filling printing to a thin substrate having a through-hole such as a BGA substrate. <P>SOLUTION: A work 50 having through-holes 61 is sticked to a sticking tape 65 and this sticking tape 65 is sucked by a table 90. High pressure hole filling printing is performed by a first squeegee 112 and low pressure thick coating printing is performed by a second squeegee 113. Since the work 50 is fixed to the table 70 by the sticking tape 65 and the through-holes 61 are closed on its back surface side by the sticking tape 65, the through-holes 61 are filled effectively. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to printing of a work having through holes. In particular, the present invention relates to printing on a substrate on which a BGA (ball grid array) or a CSP (chip size package) is mounted and which has a thickness of 0.2 mm or less.

[0002]

2. Description of the Related Art FIG. 13 is a perspective view showing a screen printing machine. FIG. 14 is a schematic side view of the screen printing machine. FIG. 15 is a schematic plan view of the screen printing machine.

In FIG. 13, 101 is a screen printing machine, 102 is a base of the screen printing machine, 103 is a movable table mounted movably, 104 is a guide rail for guiding the movement of the movable table, and 105 is a screen printing machine. Operation box, 107 is an operation switch attached to the operation box, and 109 is a moving table 103
This is a printing unit that performs screen printing on the work placed on top of. In FIGS. 14 and 15, 110 is a work placed on the moving table 103, 200 is a screen plate, 201 is a screen frame of the screen plate 200, 211 is a screen stretched on the screen plate 200, 106 is a squeegee 111 and A slider that holds a scraper (not shown) and slides in the direction of arrow A and arrow through hole diameter D, and 108 is a frame that slides the slider 106.

The moving table 103 is attached so as to be slidable right and left along a guide rail 104 attached to the base 102. Moving table 103
Moves to the bottom of the printing unit 109, the moving table 103
Is stopped by a stopper (not shown), and the printing unit 10
The screen printing is performed on the work 110 by 9.

A suction hole 190 is provided in the moving table 103, and as shown by an arrow, the work 110 can be sucked onto the moving table 103 by sucking air.

[0006]

Although the moving table 103 of the conventional screen printing machine is provided with the suction hole 190 to suck the work 110, the work 110 is made of a soft material. If or
If it is thin, as shown in FIG.
Unevenness may occur on the surface of No. 0. As described above, when the surface of the work 110 is wavy, there is a problem that printing is not performed accurately.

Further, as shown in FIG.
There may be a through hole 191. As shown in FIG. 18, the through hole 191 is used for the work 110.
Is a through hole penetrating from the front side to the back side. When printing is performed with the position of the through hole 191 and the position of the suction hole 190 of the moving table 103 being aligned, the ink 199 is sucked from the suction hole 190 and the back surface of the work 110 is soiled. there were. Also, ink 1
When printing is performed to fill the through hole 191 with 99, the through hole 191 is sucked through the suction hole 190, and the through hole 191 is printed with ink 1.
The problem of not being filled with 99 occurs.

FIG. 19 shows the through hole 1 of the work 110.
The case where the suction is positively used when 91 is filled with the ink 199 is shown. The work 110 is supported by a vinyl chloride plate 197 and posts 196. Then, by sucking air as shown by the arrow, the ink 199 is easily filled in the through hole 191.

FIG. 20 is a diagram showing a conventional screen printing method for performing fill-in printing as shown in FIG. First, hole filling printing as shown in FIG. 19 is performed. Next, the ink is dried. Next, the ink rising from the work is polished to flatten the surface of the work. Next, the first layer is printed on the surface of the work and dried.
Further, the second layer is printed on the surface of the work and dried. Next, the first layer is printed on the back surface and dried. Further, a second layer is printed on the back surface and dried. As described above, in the conventional printing method, it is necessary to perform drying five times. Alternatively, there are cases in which the steps from hole-filling printing to polishing are omitted, but even in that case, drying must be performed four times.

The thickness of the BGA substrate or CSP substrate is 0.2 m
When the thickness is less than m, the thickness of the through hole is so small that a jig having a lower peripheral portion of the through hole cannot be used. This is because the substrate is thin and the through-hole portion is lowered, so that uniform coating cannot be performed. Further, since the substrate is thin, it becomes impossible to polish the substrate after the hole filling printing.

The present invention has been made to solve the above problems, and even when the work is thin or the work is easily bent, the work is placed flat on the surface of the table. The purpose is to be able to.

Further, according to the present invention, even when a through hole exists in the work, the work can be surely adsorbed to the table, and the printed ink may drop through the through hole or the work may be dropped. The purpose is to keep the back side of the.

Another object of the present invention is to ensure that the through holes of the work can be filled with ink.

[0014]

A screen printing machine according to the present invention is a screen device for placing a work having a through hole on a table and performing screen printing with ink, in which the work is placed between the work and the table. Equipped with an adhesive tape that adheres with the adhesive and places the work on the table, the adhesive is composed of components that are not dissolved by the solvent of the ink, and when the adhesive tape is peeled from the work, the adhesive remains on the work. Characterized by not being.

The screen printing machine according to the present invention is a screen device in which a work having a through hole is placed on a table and screen-printed with ink, and the work is adhered with an adhesive between the work and the table. An adhesive tape for mounting the work on the table is provided, and the surface of the adhesive has irregularities for allowing the air in the through hole to escape so that the through hole of the work is filled with ink.

The table has a suction hole for sucking the adhesive tape on the surface of the table.

The adhesive tape adheres to the entire back surface of the work, and the table sucks the entire surface of the adhesive tape to which the work adheres through a plurality of suction holes.

The adhesive tape is drawn out from an adhesive tape roll onto a table and wound up by a winding roll.

The screen printing machine according to the present invention is a screen device for carrying out screen printing with ink by placing a work having through holes on a table, and a first squeegee for filling the through holes of the work with ink. ,
A second squeegee for applying ink to the surface of the work is provided.

The angle formed by the first squeegee and the screen during screen printing of the first squeegee is smaller than the angle formed by the second squeegee and screen during the screen printing of the second squeegee. Characterize.

The printing pressure of the first squeegee during screen printing is larger than the printing pressure of the second squeegee during screen printing.

The first squeegee and the second squeegee are attached so as to face each other, and printing is performed by the first squeegee on the same path of one work on the outward path and on the return path by the second squeegee. It is characterized by performing printing by.

In the screen printing method according to the present invention, an adhesive tape is attached to the back surface of the work, the adhesive tape is placed between the work and the table, and the work is placed on the table. And a surface printing step of screen-printing using.

The front surface printing step is characterized by including a first printing step with a high printing pressure and a second printing step with a low printing pressure.

In the screen printing method, after the front surface printing step, an adhesive tape is attached to the front surface of the work, and the back surface placing step is performed in which the adhesive tape is placed between the work and the table and the work is placed on the table. And a backside printing step of screen-printing on the backside of the work with ink.

The screen printing method further includes a semi-drying step of drying the ink to a semi-dry state between the front surface printing step and the back surface placing step, and a total drying step of drying the ink after the back surface printing step. And a process.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. This invention is BG
It is desirable to apply it to the screen printing of the A substrate or the CSP substrate. The thickness of the current BGA substrate or CSP substrate is 0.2 mm, but it will be 0.1 mm or less in the near future. Substrate (work) is 0.1 mm
When the thickness is below, the substrate itself becomes soft and warp (distortion) occurs in the substrate, and it becomes difficult to securely fix the substrate by the conventional method using the jig for fixing the work. Therefore, a major feature of the present invention is to use a fixing method using an adhesive tape (adhesive film) as a method of fixing this substrate to the table of the screen printing machine.

FIG. 1 is a diagram showing an embodiment of a screen printing machine according to the present invention. The screen engraving 99 is composed of a screen 90 and a screen frame 92.
In addition, the screen printing machine has a first squeegee 112.
And a second squeegee 113. Adhesive rolls 66 and take-up rolls 67 are provided on both sides of the table 70. An adhesive tape 65 is attached from the adhesive roll 66 to the take-up roll 67 so as to be continuously movable with the adhesive surface facing upward. The back surface of the work 50 is attached to the adhesive tape 65. The work 50 has a through hole 61. Table 70
Can reciprocate in the directions of arrows B and C. Further, the first squeegee 112 performs the printing operation in the direction of arrow A (outward path). Further, the second squeegee 113 performs the printing operation in the direction of the arrow D (return path). The adhesive roll 66 rotates in the direction of arrow B, and pays out the adhesive tape 65, and the adhesive tape 65 moves in the direction of arrow F together with the work. The take-up roll 67 rotates in the direction of arrow G and winds the adhesive tape 65. The width W1 of the work 50 is equal to the width W2 of the adhesive tape 65 (W1 = W2).

Next, the conventional adhesive tape 34 and the adhesive tape 65 of the present invention will be described with reference to FIGS. 2 and 3. The conventional adhesive tape 34 shown in FIG. 2 includes a conventional adhesive 31 and a film 33. When printing is performed using the conventional adhesive tape 34, the lower periphery of the through hole 61 is covered with the conventional adhesive 31.
There is no place for air to escape in the through hole 61. For this reason,
When the ink 84 is filled from above, the air pressure interferes with the filling of the ink 84, and the ink 84 fills the through hole 61.
May not enter enough. On the other hand, as shown in FIG. 3, in the pressure-sensitive adhesive tape 65 of the present invention, the film 33 is used as the supporting base material and the uneven portion is formed in the pressure-sensitive adhesive 35. Due to the presence of the uneven portion, the air in the through hole 61 can enter the concave portion of the adhesive 35, and the through hole 6
The ink 84 does not get in the way. On the other hand, the gap formed in the concave portion of the adhesive 35 is not so large as to introduce the viscous liquid ink 84. That is, the uneven portion formed on the pressure-sensitive adhesive 35 is an uneven portion for allowing air (or gas) to escape, and does not form a gap enough to draw in the ink 84 (or liquid).

Next, the difference between the conventional adhesive tape 34 and the adhesive tape 65 of the present invention will be described with reference to FIGS. 4 and 5. As shown in FIG. 4, the conventional pressure-sensitive adhesive 31 of the conventional pressure-sensitive adhesive tape 34 contains a composition that is dissolved by the solvent (including thinner, diluent and mixed solvent) of the ink 84. Therefore, when the conventional adhesive tape 34 is peeled off from the work 50, the conventional adhesive 31 may melt and remain on the work 50 or the circuit pattern 86. Furthermore, when the adhesive force of the conventional adhesive 31 is too strong, there is a possibility that the ink 84 filled in the through hole 61 (or the ink 84 printed on the surface of the work 50) may be peeled off. On the other hand, as shown in FIG. 5, the pressure-sensitive adhesive tape 65 of the present invention uses the pressure-sensitive adhesive 35 composed only of the components of the ink 84 which are not dissolved by the solvent. Therefore, when the adhesive tape 65 is peeled off from the work 50, the adhesive 35 does not remain on the work 50. In addition, since the surface of the adhesive 35 has unevenness, it can be easily peeled off from the work 50 or the circuit pattern 86, and the ink 84 filled in the through hole 61 (or printed on the surface of the work 50). There is little fear that the ink 84) will be stripped off.

As described above, the adhesive tape 65 of the present invention
The use of has the following advantages. (1) It is possible to prepare a plurality of adhesive tapes 65 having different adhesive strengths, and use the optimum adhesive tape 65 according to the thickness of the work 50, the viscosity of the ink 84, and the like.
That is, it is easy to control the adhesive strength. (2) By providing the uneven portion on the surface of the adhesive 35 of the adhesive tape 65, air can easily flow and the ink 84 can be easily filled. Further, since the pressure-sensitive adhesive tape 65 as a whole is flat, the ink does not spread around the back surface of the work. That is, the through hole 61 is closed by the adhesive tape 65, the back surface of the work is flattened, the protrusion of the ink 84 on the back surface of the work is eliminated, and the polishing work for removing the protrusion is unnecessary. (3) As compared with the case of using a conventional jig, the jig and the workpiece 50 are not required to be aligned, and the positioning operation is not required. That is, when setting the work on the table (on the jig), the pin guide and the image recognition device are unnecessary. (4) Conventionally, when performing the hole filling printing only in the place where the through hole exists, the printing is performed using the screen of the hole filling pattern, but in the present invention, the back surface of the substrate is the adhesive tape 65.
Since it is supported flat by the solid pattern printing, it is sufficient to print a solid pattern when performing hole filling printing. The solid pattern refers to a print pattern that is uniform over the entire surface without using any special pattern. Since the printing is performed using the solid pattern, the accurate positioning operation of the work on the table becomes unnecessary. (5) When performing double-sided printing, when printing on one side after printing on one side, the entire one side after printing is covered with adhesive tape, and the surface of the printed work does not touch the table directly. It is possible to prevent ink from getting dirty. (6) The suction holes provided in the table can be used as before. That is, the entire surface of the adhesive tape 65 is attracted to the table by suction from the suction holes of the table, and the entire surface of the work 50 is adsorbed by the adhesive 35 of the adhesive tape 65. As a result, the work 50 is entirely fixed to the table. Will be done. (7) Further, since the work 50 is adhered by the adhesive tape 65, when the screen 90 is peeled off from the work 50 after printing, plate separation is improved. Lift the screen 90 after printing, or the table 7 after printing.
When the screen 90 and the work 50 are separated by lowering 0, the work 50 is prevented from being stuck to the screen 90 because the work 50 is adhered by the adhesive tape 65. That is, there is an advantage that the plate separation is improved. In particular, when the work 50 is a thin substrate of 0.1 mm or less, there is a possibility that the end of the work 50 may remain stuck to the screen 90, but the adhesion by the adhesive tape 65 may cause plate separation. Is effective to improve.

FIG. 5 is a flow chart showing the printing method of the screen printing machine according to the present invention. First, the adhesive tape 65 is attached to the back surface of the work and placed on the table 70 (S11). Next, in S12, surface printing is performed on the surface of the work. This printing is divided into first printing (S13) and second printing (S14). FIG. 6 shows the first
It is a figure which shows the printing of the 1st time. The first squeegee 112 is
While moving in the direction of arrow A, the first printing mainly for filling holes (hole filling) is performed. The first squeegee 112 performs a printing operation with a high printing pressure P1. In addition, the printing angle θ1 formed by the screen 90 and the first squeegee 112
Is small. When the printing pressure P1 is increased and / or the printing angle θ1 is decreased, the ink 84 causes the through holes 6
It becomes easy to fill 1. No pattern is formed on the screen 90 in this case, and a solid pattern may be used.

FIG. 7 is a diagram showing the second printing.
While the second squeegee 113 moves in the direction of arrow D,
The second printing is performed mainly for thick coating of the work surface. The second squeegee 113 prints at a low printing pressure P2 (P1> P2) compared to the first printing. The printing angle θ2 formed by the screen 90 and the second squeegee 113 is larger than the printing angle θ1 formed by the first squeegee 112 and the screen 90. The ink 84 can be applied thickly on the work 50 by increasing the printing angle θ2 and / or decreasing the printing pressure P2. Here, the characteristic point is that the first printing is mainly used for filling holes and the second printing is used for thick coating. In addition, a characteristic point is that a drying step is not provided between the first printing and the second printing. As described above, the first and second printing can be continuously performed in the forward and backward passes without providing a drying step, because the back surface of the work 50 is supported flat by the adhesive tape 65 without any depression. Because it is. Even when the ink 84 is filled into the through hole 61 twice in the wet state, the work 50 does not deform at all and the ink 84 goes around to the back surface of the substrate of the through hole 61. Printing can be performed without When printing is performed twice in succession in the state as shown in FIG. 19, there is a problem that the ink further wraps around to the back surface, whereas in the present invention, the adhesive tape 65 is used.
Since the entire back surface of the workpiece 50 is covered in a flat manner by using the ink, the ink 84 does not go around to the back surface.

Next, returning to FIG. 5, in S15, the adhesive tape 65 is peeled off from the work. Further, in S16, the work is put into a drying chamber and dried. In this case, the ink is semi-dried or freshly dried. For example,
Dry until the solvent of the ink is 50% to 70% free. In this way, the reason why the drying is stopped in the semi-dry state is that if the solvent is dried to 100%, one side of the work becomes once wet and the work is forcibly dried. Warp or return,
Alternatively, it causes distortion. Therefore, the drying is stopped in the semi-dry state so that the work 50 is not warped, curled, or distorted. The semi-dry state means a dried state that does not hinder printing during back surface printing described later. More specifically, when the adhesive tape 65 is attached to the surface of the printed work and then peeled off, the ink may be in a dry state such that the ink on the surface of the work is not peeled off by the adhesive tape 65. The degree of the dry state is determined by the relative relationship with the adhesive force of the adhesive tape 65, and when the adhesive force of the adhesive tape 65 is small, it may be in a wet state,
When the adhesive strength of the adhesive tape 65 is large, it is preferable to dry it.

Returning to FIG. 5, in S17, the adhesive tape 65 is attached to the surface of the work and placed on the table. Next, in S18, back surface printing is performed. It is desirable to perform the first printing and the second printing for this back side printing as well as the front side printing in S12. However, in this back surface printing, since the through holes 61 are already filled with the ink 84 in the front surface printing, the printing is not performed twice,
Printing may be performed only once. Next, in S21, the adhesive tape 65 is peeled off. At this time, as described above, the relationship between the adhesive force of the adhesive tape 65 and the semi-dried state of the ink must ensure that the ink is not peeled off by the adhesive tape 65. Finally, in S22, the work 50 is put in a drying chamber, the front surface and the back surface are dried, the solvent is completely removed, and the work is completely dried.

Based on the flow chart of FIG. 5, when drying, only half-drying in S16 and total drying in S22 are performed. Therefore, the number of times of drying is reduced from 4 or 5 times to 1.5 times as compared with the conventional case. For this reason, the chances of warping, returning and distortion of the work due to drying are greatly reduced. In particular, when only one side is printed, since it is only semi-dried, the probability of warping on one side is reduced compared to the conventional case.

According to the conventional printing method, since the printing and the drying are repeated, the ink coating thickness tends to vary. On the other hand, in this embodiment, since the ink is continuously applied twice in a wet state and only semi-drying or full-drying is performed, it is possible to reduce variations in the ink application thickness.

The adhesive tape of the present invention includes those in which the supporting base material is other than the film 33. For example, the supporting substrate may be cloth, paper, plastic, synthetic resin, or mesh.

Further, the adhesive tape of the present invention includes those other than the strip-shaped tape in a roll shape. For example, an adhesive sticker, an adhesive plate, an adhesive plate, or an adhesive foil, which has the same shape or the same size as the work and is plate-shaped or patch-shaped, may be used.
The shape and size may be different.

The adhesive tape of the present invention need not cover the entire surface of the work, but may cover only a part of the work. In addition, it may be used only once, instead of being disposable, and used several times.

The pressure-sensitive adhesive tape of the present invention may be a double-sided tape having not only one side but also a pressure-sensitive adhesive on both sides.

The adhesive does not have to be provided on the entire surface of the film 33, and may be a part thereof. For example, the adhesive is
Only the central portion of the film 33 may be used.

Further, the adhesive is intermittent, striped,
It may be in a check or polka dot pattern.

Embodiment 2. FIG. 8 is a diagram showing the relationship between the work 50 and the adhesive tape 65. Workpiece 50 is arrow F
When it is carried in in the direction of, the adhesive tape 65 is also moved in the direction of arrow F in synchronization with it. This movement is performed by the motor 3
6 is performed. Then, as shown in FIG. 9, when the work 50 after printing is carried out, the motor 36 is similarly operated to move the work 50 to the arrow F. In this way, the movement of the work 50 is performed by the movement of the adhesive tape 65. The positioning of the work 50 is also performed by stopping the movement of the adhesive tape 65. Conventionally, when the work 50 is carried in on the table 70, positioned, and carried out, a carry-in mechanism, a positioning mechanism, and a carry-out mechanism are required, but according to this embodiment, movement of the adhesive tape 65 is required. This can be done only by itself, and the structure of the table 70 becomes very simple. Further, when the adhesive tape 65 is peeled off from the work 50, it suffices to simply wind up the take-up roll 67, and the work 50 can be carried out in the direction of the arrow F while peeling off the adhesive tape 65 from the work 50. it can.

FIG. 10 shows the work 50 to the adhesive tape 65.
In the case where the adhesive tape 65 is peeled off, the case where the adhesive tape 65 is peeled off in the direction opposite to the carrying-out direction (arrow F) by 180 degrees is shown.
As described above, when peeling the adhesive tape 65 from the work 50, it is desirable that the peeling angle θ3 be more acute. The reason for this is that the sharper the angle, the smaller the probability of peeling the ink from the work 50 by the adhesive tape 65 can be reduced.

Embodiment 3. FIG. 11 shows a screen 90.
The case where a Teflon (registered trademark) processed film 114 is provided on the lower surface as an adhesion preventing material is shown. Since the Teflon (registered trademark) processed film 114 is Teflon (registered trademark) processed, it is easily peeled off from the adhesive tape 65. When the Teflon (registered trademark) processed film 114 is adhered to the adhesive tape 65 by screen printing, the screen 90 and the Teflon (registered trademark) are present due to the presence of the Teflon (registered trademark) processing.
The processed film 114 is easily peeled off, and the work 50
The adhesive tape 65 can keep a flat state on the table. Teflon (registered trademark) processed film 11
4 may be provided all around the screen 90, but as shown in FIG. 1, when the width W1 of the work 50 and the width W2 of the adhesive tape 65 are equal, the Teflon (registered trademark) processed film 114 is It may be provided before and after the adhesive tape 65 in the traveling direction.

FIG. 12 shows a case where the adhesive tape 65 is exposed to the table 70 by the same length L2 as the length L1 of the work 50. In the case shown in FIG. 12, the adhesive tape 65
It is possible to reduce the amount of wear of the film and to eliminate the contact between the screen 90 and the adhesive tape 65 at all, so that it is not necessary to provide the Teflon (registered trademark) film 114.

[0048]

As described above, according to the present invention, since the adhesive tape is provided between the work and the table, the work is kept flat on the table even if the work is thin. The effect is that it can be fixed.

Further, according to the present invention, even if the work has through holes, the adhesive tape 65 is adsorbed on the entire back surface of the work, so that ink can be filled into the through holes.

Further, according to the present invention, the adhesive tape 65
Since the uneven portion is provided on the surface of the, the air in the through hole can be released and the ink can be easily filled.

Further, according to the present invention, since the adhesive of the adhesive tape is not dissolved in the solvent of the ink, the dissolved adhesive does not remain as contamination on the back surface of the work.

Further, according to the present invention, since the work having the through holes is held by the adhesive tape, the ink can be continuously printed twice while being wet.

Further, according to the present invention, since the double squeegee is used, it is possible to print continuously on the same work in the forward and backward passes.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts of a screen printing machine according to the present invention.

FIG. 2 is a diagram showing a printing state using a conventional adhesive tape 34.

FIG. 3 is a diagram showing a printed state using the adhesive tape 65 of the present invention.

FIG. 4 is a diagram showing a case where a conventional adhesive tape 34 is peeled off.

FIG. 5 is a diagram in the case of peeling off the adhesive tape 65 of the present invention.

FIG. 6 is a diagram showing a screen printing method of the present invention.

FIG. 7 is a diagram showing a first printing process of the present invention.

FIG. 8 is a diagram showing a second printing step of the present invention.

FIG. 9 is a diagram showing a method for carrying in and carrying out a work 50 according to the present invention.

FIG. 10 is a diagram showing a method of peeling off the adhesive tape 65 of the present invention.

FIG. 11 is a view showing a Teflon (registered trademark) processed film 114 of the present invention.

FIG. 12 is a diagram showing the relationship between the length of the adhesive tape 65 of the present invention and the work 50.

FIG. 13 is a perspective view of a conventional screen printing machine.

FIG. 14 is a side view of a conventional screen printing machine.

FIG. 15 is a plan view of a conventional screen printing machine.

FIG. 16 is a diagram showing a problem of the conventional screen printing machine.

FIG. 17 is a diagram showing a conventional work having through holes.

FIG. 18 is a diagram showing a problem at the time of printing on a work having a conventional through hole.

FIG. 19 is a diagram illustrating filling in holes using a conventional suction force.

FIG. 20 is a diagram showing a conventional screen printing method.

[Explanation of symbols]

31 conventional adhesive, 33 film, 34 conventional adhesive tape, 35 adhesive, 36 motor, 50 work, 61 through hole, 65 adhesive tape, 66 adhesive roll, 67 winding roll, 70 table, 71 suction hole, 84 Ink, 86 circuit pattern, 90 screen, 92 screen frame, 112 1st squeegee, 113 2nd squeegee, 114 Teflon (trademark) processed film.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H05K 3/28 H05K 3/28 E (72) Inventor Yasushi Sano 1-2-7 Iron & Steel Street, Urayasu, Chiba Mike F-term in RO-TEC Co., Ltd. (reference) 2C035 AA02 AA06 FA30 FD01 FD19 5E314 AA24 CC07 FF01 FF08 GG24

Claims (5)

[Claims] 1. A screen device in which a work having through-holes is placed on a table and screen-printed with ink. A first squeegee for filling the through-holes of the work with ink and ink on the surface of the work. A screen printing machine comprising a second squeegee for painting. 2. The angle formed by the first squeegee and the screen when screen-printing the first squeegee is the second
2. The screen printing machine according to claim 1, wherein the angle is smaller than the angle formed by the second squeegee and the screen when the squeegee is screen printed. 3. The screen printing machine according to claim 1, wherein the printing pressure of the first squeegee during screen printing is larger than the printing pressure of the second squeegee during screen printing. 4. The first squeegee and the second squeegee are attached so as to face each other, printing is performed by the first squeegee on the same path of one work on the outward path, and second on the return path. The screen printing machine according to claim 3, wherein printing is performed using the squeegee. 5. A screen printing method in which a work having holes is placed on a table, and the work is screen-printed with ink using a squeegee. In the screen printing method, the through holes of the work are filled with ink using the squeegee. A printing step, and after the first printing step, ink is applied to the surface of the work at an angle smaller than the angle formed by the squeegee and the screen in the first printing step, and the squeegee in the first printing step A screen printing method comprising a second printing step of applying ink to the surface of the work by at least one of applying ink to the surface of the work with a printing pressure smaller than the printing pressure during screen printing. .