JP3320579B2 - Printing apparatus and printing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for printing a circuit board used in a circuit of an electronic apparatus.

[0002]

2. Description of the Related Art In recent years, multilayered circuit boards have been used in order to realize a small-sized and high-performance circuit board from a single-sided board to a double-sided board and further to a multilayer circuit board. Wiring patterns formed on a circuit board and via holes for interlayer connection are mainly manufactured by a printing method using a squeegee. In the printing method, squeegee hardness, angle,
An extremely large number of conditions such as printing pressure and speed need to be set, and a slight difference in settings affects the quality. Therefore, adjustments are made based on experience at the manufacturing site to improve the process yield.

[0003] A conventional circuit board printing apparatus and its printing method will be described below with reference to the drawings. FIG. 11 shows a first conventional circuit board printing apparatus. 1 is a release film, 2 is a compressible, porous substrate having a through hole 2a for forming a via hole, and the porous substrate 2 has a release film 1 bonded to both sides. ing. Reference numeral 3 denotes a conductive paste for printing, and reference numeral 4 denotes a stage. A porous substrate 2 is disposed on the stage 4 in contact with the stage 4, and via a release film 1 bonded to the porous substrate 2. Direct printing. Reference numeral 5 denotes a cylindrical squeegee.
Move while touching on the. A squeegee 5 is arranged above the release film 1, and the squeegee 5 can move in the vertical direction and the printing direction (the horizontal direction in FIG. 11).

[0004] A printing method using this printing apparatus will be described. First, the porous substrate 2 on which the release film 1 is attached is set at a predetermined position on the stage 4. The paste 3 is supplied onto the porous substrate 2, the squeegee 5 is lowered, and the porous substrate 2 is maintained under a predetermined pressure. Further, the squeegee 5 is moved in the printing direction,
Printing is performed by moving the paste 3 on the porous substrate 2.

FIG. 12 shows a second conventional circuit board printing apparatus. In FIG. 12, 3 is a printing paste having conductivity, 4 is a stage, and 6 is an opening 6a.
7 is a rectangular and elastic squeegee that moves while being in contact with the mask 6. 8 is a circuit board having compressibility and having a through hole 8 a formed therein. It is placed in contact with the top. The mask 6 is arranged above the circuit board 8 with a slight space, and the paste 3 can be supplied on the mask 6. A squeegee 7 is arranged above the mask 6, and the squeegee 7 can move in the vertical direction and the printing direction (the horizontal direction in FIG. 12).

The operation of the printing apparatus will be described. First, the circuit board 8 is set at a predetermined position on the stage 7, and the mask 6 is placed on the circuit board 8 with a slight gap.
Is set. Next, the paste 3 is supplied onto the mask 6, the squeegee 7 is moved down in the printing direction by lowering the squeegee 7 on the mask 6 until its corners (edges) come into contact, and the paste 3 is moved on the mask 6. Perform printing with.

[0007]

However, in the above-described configuration, the printing shape and printing amount of the paste 3 greatly change even with an extremely small mechanical error, and printing defects such as bleeding and blurring occur. I do. Also, if the viscosity of the paste 3 is increased or used, the printing amount is insufficient under the condition of the printing apparatus that has been set to a good state, and it takes an extremely long time to set the printing conditions again. There was a problem that.

Further, in the printing apparatus of the first conventional example described above, when the filling amount is to be ensured, the printing shape deteriorates and bleeds, causing problems such as dripping. On the other hand, when trying to prevent bleeding and dripping, the printing amount is reduced. Had a serious problem of shortage.

Furthermore, in the printing apparatus of the second conventional example, since the amount of the paste 3 remaining on the surface of the mask 6 and not contributing to printing is too large, the cost of the paste 3 for the printing process is seriously increased. Had issues.

The present invention solves these problems.
It is an object of the present invention to provide a printing apparatus and a printing method that can ensure a sufficient filling force while being able to widely correspond to the viscosity of various pastes, and that can reduce the deformation of the paste and ensure a good printing shape. I do.

[0011]

Means for Solving the Problems In order to solve the above problems, a first means of the present invention is to provide a base material provided with a release film, wherein a through hole is provided, and a conductive paste is filled in the through hole. a printing apparatus for filling, comprising a filling head for filling a paste into said through-hole, and a leveling head for leveling a portion of the paste was carried out the filling, the filling f
Is a guide that collects the paste and the collected paste
Is separated so that it can move independently.
It is provided with .

[0012]

[0013] The second means of the present invention is the first means, and has a control means for independently controlling the force applied to the guide portion and the stopper portion. Further, the third means of the present invention provides a method for preparing a base material having a release film.
A through hole is provided, and the through hole is filled with a conductive paste.
A printing device for filling a paste into the through-hole.
Filling head and the paste of the filled portion
And a leveling head for leveling, the filling head was formed in a cylindrical shape, and a throat portion which was grooved in a lateral direction perpendicular to the printing direction was provided in a portion near a printing surface contributing to filling in the filling head. Things.

[0014] A fourth means of the present invention is a mold for a releasable filter.
A through-hole is provided in the substrate having the
A printing apparatus for filling a conductive paste, the printing apparatus comprising:
A filling head for filling the paste into the through-holes;
Leveling head to level the paste
The filling head is formed in a cylindrical shape, and a plurality of minute concave portions are provided in a portion near a printing surface which contributes to filling in the filling head.

[0015] A fifth means of the present invention provides a releasable filter.
A through-hole is provided in the substrate having the
A printing apparatus for filling a conductive paste, the printing apparatus comprising:
A filling head for filling the paste into the through-holes;
Leveling head to level the paste
And a fiber formed in a net shape is attached to the sweeping surface of the leveling head. In a sixth aspect of the present invention, a substrate provided with a release film is provided with a through hole.
A printing device for filling the through-hole with a conductive paste.
A filling head for filling the through-hole with paste.
And the paste of the filled portion is leveled.
And a leveling head formed by laminating a plurality of squeegees having different hardnesses from each other.

[0016] A seventh means of the present invention is that a releasable filter is provided.
A through-hole is provided in the substrate having the
A printing apparatus for filling a conductive paste, the printing apparatus comprising:
A filling head for filling the paste into the through-holes;
Leveling head to level the paste
And a curved convex surface is formed in a portion that comes into contact with the printing surface of the leveling head. Also, in the printing method of the present invention, a through hole is provided in a substrate having a release film, and the through hole is filled with a conductive paste.
A printing method for filling with a filling head , wherein the filling head comprises
The guide and the stopper that move
The paste is collected by the guide part, and the collected paste is
Filled and held in topper portion, a portion of the paste was carried out the filling is intended Ru Reberingusu.

[0017]

According to the first means, the filling head for filling the paste into the through-hole and the leveling head for leveling the paste in the filled portion are separately provided, so that the residual paste after filling is leveled. Leveling can be performed while being removed by the head, and a sufficient filling force can be secured while being able to cope with the viscosity of various pastes widely.

Further, the Filling head, and a guide portion for collecting the paste, into a stopper portion for holding the collected paste,
By dividing to move independently, it is possible to reduce the paste remaining on the printing surface with reducing the paste not involved in filling, yet this effect and the guide portion in the second unit stopper It is further enhanced by controlling the force applied to the part independently.

According to the third and fourth means, the filling head can be formed into a cylindrical shape, so that the filling power to the paste can be improved and the flow of the paste can be forcibly caused. It is possible to fill the through-hole of the base material with the paste having high viscosity by disturbing the flow of the paste by the minute concave portions.

In the fifth means, by adhering net-like fibers to the sweeping surface of the leveling head, it is possible to suppress the intrusion of the edge into the through hole due to the deformation of the tip of the squeegee, and the filling is performed. Leveling can be performed without depressing the printed surface of the paste, and the printed shape can be stabilized.

Further, by forming the leveling head by laminating a plurality of squeegees having different hardnesses by the sixth means, the leveling of the paste on the release film and the forming of the paste on the through hole are performed. Two different levels of leveling can be performed favorably.

Further, by the seventh means, a curved convex surface is formed at a portion in contact with the printing surface of the leveling head, so that deformation of the squeegee is reduced, and the edge of the squeegee is inserted into the through hole. Can be reduced.

Further, a filling head is configured as a printing method.
The guide and the stopper that move
The paste is collected by the guide part, and the collected paste is
Filled and held in the topper unit, wherein the filling the carried part of the paste makes it possible to select each optimal condition by Ru Reberingusu, it is possible to select the most desirable print condition.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a printing apparatus and a printing method according to an embodiment of the present invention will be described with reference to the drawings. The components having the same functions as those in the related art are denoted by the same reference numerals.

FIG. 1 shows a printing apparatus according to a first embodiment of the present invention. As shown in FIG. 1, in this printing apparatus, a conductive printing paste 3 is filled in a through hole 2a for forming a via hole in a porous base material 2 on which a release film 1 is bonded on both sides. Filling head 1
1 and a leveling head 12 for leveling the filled portion of the paste 3 are separately provided. The leveling head 12 is disposed at a position rearward with respect to the moving direction of the filling head 11, and the paste 3 remaining on the release film 1 after the filling head 11 has filled the paste 3.
Is removed by the leveling head 12, and the filled paste 3 is leveled.

Here, as shown in FIG.
Reference numeral 1 denotes a columnar head having a leveling head 12.
Is rectangular. Also, release film 1
The filling head 11 and the leveling head 12 are arranged above the head, and the filling head 2 and the leveling head 12 can move in the vertical direction and the printing direction. As in the conventional case, the porous substrate 2 has compressibility, the porous substrate 2 is arranged in contact with the stage 4, and the release film bonded to the porous substrate 2. 1 can be directly printed.

As described above, the filling head 11 and the leveling head 12 are separately provided, and after filling, the remaining paste 3 is removed by the leveling head 12 and leveling is performed. A sufficient filling force can be ensured while it is possible.

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a cross-sectional view schematically showing a filling head of a printing apparatus according to a second embodiment of the present invention and the vicinity thereof.

In this embodiment, a filling head 13 shown in FIG. 2 is provided instead of the filling head 11 shown in FIG. That is, the filling head 13 is formed by dividing a substantially cylindrical shape into front and rear portions with respect to the printing direction, and forms a semi-cylindrical guide portion 13a disposed on the front side in the printing direction.
And a stopper portion 13b of a quarter-cylindrical shape arranged on the rear side in the printing direction, and the applied pressure of the guide portion 13a and the stopper portion 13b is controlled independently by control means (not shown). . In FIG. 2,
A pressurizing mechanism 14 presses the stopper 13b of the filling head 13, and the pressurizing mechanism 14 includes, for example, a pressurizing spring.

A printing method by the printing apparatus will be described with reference to FIGS. First, FIG. 3A is a diagram schematically showing the flow of the paste 3 in the vicinity of the conventional columnar squeegee 5. Squeegee 5
As the paste moves, the paste 3 flows out behind the squeegee 5 so that the paste 3 is crushed, so that a large amount of the paste 3 is used during the filling stroke. Therefore, as the number of printed sheets increases, the filling amount of the paste 3 becomes insufficient.

FIG. 3B is a diagram schematically showing the flow of the paste 3 near the filling head 13 shown in FIG. As the guide portion 13a of the filling head 13 moves, the paste 3 flows backward so as to be crushed, but the paste 3 is held in front of the stopper portion 13b by the stopper portion 13b provided behind the guide portion 13a. Is done.
Then, due to the paste 3 flowing from the guide portion 13a toward the stopper portion 13b, pressure is generated in the paste 3 existing near the lower end of the stopper portion 13b, and the paste 3 passes through the through-hole of the porous base material 2. Actively invades 2a.

Table 1 shows the results of examining whether the paste 3 remains on the release film 1 when the filling head 13 is moved while the amount of the paste 3 to be supplied is constant.は indicates a state where the paste 3 did not remain, and X indicates a state where the paste 3 remained.

[0033]

[Table 1]

As shown in Table 1, the filling head 13 is divided into a guide portion 13a and a stopper portion 13b, and the pressure is controlled independently to perform filling so that the paste 3 remains on the printing surface. It was found that it was possible to prevent. In addition, the filling amount at this time was sufficiently obtained, and it can be determined that the filling force did not decrease.

As described above, according to the second embodiment, the filling head 13 has a substantially cylindrical shape, is divided into the guide portion 13a and the stopper portion 13b, and the applied pressure is controlled independently to improve the filling force. Paste 3 on the printing surface
Can be filled without leaving the paste. Therefore, while securing the filling power for printing,
The cost of the paste 3 for filling can be reduced.

Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a cross-sectional view schematically showing a filling head of a printing apparatus according to a third embodiment of the present invention and a portion in the vicinity thereof.

In this embodiment, a filling head 15 shown in FIG. 4 is provided instead of the filling head 11 shown in FIG. In other words, in the vicinity of the printing surface contributing to filling on the outer peripheral surface of the filling head 15, that is, in the range from the front end portion in the printing direction in the circumferential direction of the filling head 15 to the vicinity of the lower end portion, the width direction of the filling head 15 is A throat portion (groove portion) 16 is formed extending along a direction (perpendicular to the plane of FIG. 4). Note that, similarly to the filling head 11 shown in FIG. 1, a filling head 15 is disposed above the release film 1, and the filling head 15 is movable in the vertical direction and the printing direction.

A printing method using this printing apparatus will be described with reference to FIG. When the filling head 15 is moved on the release film 1, the paste 3 flows into a throat portion 16 formed on the filling head 15. And
After the paste 3 has entered the throat portion 16, the portion that has not been subjected to the throat processing acts as a projection on the paste 3 and disturbs the flow of the paste 3. In a normal viscous fluid, in the flow as shown in FIG. 3A, the flow rate of the paste 3 toward the through hole 2a on the printing surface (the lower side in FIG. 3A) is zero. That is, the filling direction is low when the paste 3 is filled in the through-holes 2a by 90 degrees with respect to the front side in the printing direction and the direction to be filled. In contrast to this state, as shown in FIG. 4, by forming a state in which the flow of the paste 3 is disturbed by the throat section 16, a pressure distribution is generated in the flow, and a discontinuous surface of the velocity is formed. A vortex is formed in the vicinity of the release film 1 and a local flow of the paste 3 can be formed.

Here, the velocity distribution of the fluid flowing on the flat plate will be described with reference to FIGS. 5 (a) and 5 (b). As shown in FIG. 5A, the release film 1 and the paste 3
The speed is 0 at the interface with. The region near the interface between the paste 3 and the release film 1 is called a boundary layer, and the presence of this boundary layer reduces the momentum of the paste 3 per unit time. The decrease in momentum in the boundary layer is due to the deceleration effect due to viscosity. The thickness of the area where the momentum decreases is the momentum thickness;
θ), and the following equation is generally used.

[0040]

(Equation 1)

In other words, it can be considered that the surface of the release film 1 becomes thicker by the momentum thickness θ, the flow of the paste 3 is pushed away, and an ideal fluid flows just above the paste 3. In other words, it can be seen that the pressure applied to the through-hole 2a of the porous substrate 2 and the hole of the release film 1 is reduced due to the presence of the boundary layer, which is an obstacle to filling. On the other hand, by providing the throat portion 16 in the filling head 15, the filling pressure is increased along the flow direction of the paste 3, and a pressure gradient is formed so as to suppress the progress of the paste 3 downstream and return to the upstream. It becomes possible. As a result, as shown in FIG.
Backflow occurs in itself, and the boundary layer is separated from the surface of the release film 1, and a discontinuous flow (vortex) layer can be formed in the vicinity of the surface of the release film 1. A sufficient filling pressure can be applied to the through-hole 2a, and the flow direction of the paste 3 can be directed to the through-hole 2a.

Here, Table 2 shows the width of the throat portion 16 formed on the filling head 15 and the printing state.
Indicates that a sufficient filling force could be secured, and X indicates that a sufficient filling force could not be secured.

[0043]

[Table 2]

As can be seen from Table 2, when the width of the throat portion 16 formed in the filling head 15 is 3 mm or less, a sufficient filling force can be secured. Next, a fourth embodiment of the present invention will be described with reference to FIG.

FIG. 6 is a cross-sectional view schematically showing a filling head of a printing apparatus according to a fourth embodiment of the present invention and the vicinity thereof. In this embodiment, a filling head 17 shown in FIG. 6 is provided instead of the filling head 11 shown in FIG. In other words, in the vicinity of the printing surface contributing to the filling on the outer peripheral surface of the filling head 17, that is, in the range from the front end portion in the printing direction in the circumferential direction of the filling head 15 to the vicinity of the lower end portion, appropriate values in the circumferential direction and the width direction are provided. Hemispherical minute concave portions 18 are formed at intervals. In addition,
As in the case of the filling head 11 shown in FIG.
A filling head 17 is arranged above the head, and the filling head 17 is movable in a vertical direction and a printing direction.

A printing method by the printing apparatus will be described with reference to FIG. When the filling head 17 is moved on the release film 1, a peeling point is generated in the flow of the paste 3 due to the minute concave portion 18 formed in the filling head 17, and the flow of the paste 3 may be disturbed. It becomes possible. This turbulence hardly occurs at low speeds, and the turbulence increases as the speed increases, and the development of the boundary layer described with reference to FIG. 5 can be suppressed. Therefore, the paste 3 is applied to the through holes 2a formed in the porous base material 2.
Can be improved by the same principle as the filling head 15. In the filling head 17, since the head can be partially processed, the flow of the paste 3 can be partially disturbed. As can be seen from Table 3, filling can be performed at a speed higher than the conventional printing speed.

[0047]

[Table 3]

Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 7 is a cross-sectional view schematically showing a leveling head of a printing apparatus according to a fifth embodiment of the present invention and its vicinity.

In this embodiment, the leveling head 19 shown in FIG. 7 is used instead of the leveling head 12 shown in FIG.
Is provided. In other words, in the leveling head 19, a mesh-like fiber (hereinafter, abbreviated as a structural fiber) 21 is attached to the sweeping surface of a rectangular leveling head body 20. As in the case of the leveling head 12 shown in FIG. 1, a leveling head 19 is disposed above the release film 1, and the leveling head 19 can move in the vertical direction and the printing direction.

In the conventional printing method shown in FIG. 12, since the corner (edge) of the squeegee tip contacts the opening 6a of the mask 6, the pressure applied to the squeegee 7 varies greatly. The squeegee 7 is in a state where the corner 7a at the tip of the squeegee 7 enters the opening 6a of the mask 6, and it is difficult to control the filling amount over the printing surface.

On the other hand, the leveling head 19 in the present embodiment has a net fiber 21 attached to the leveling head body 20.
Is adhered, so that the net fiber 21 prevents the leveling head body 20 from entering the openings such as the hole of the release film 1 and the through hole 2a of the porous base material 2 and is prevented.

Table 4 shows the relationship between the pressure at the leveling portion of the leveling head 19 and the depression on the surface of the leveling portion. In the table, ○ indicates that there was no depression, and X indicates that the depression occurred. As is apparent from Table 4, by attaching the net-like fibers 21 having a somewhat fine mesh, the leveling head main body 20 is prevented from entering the holes of the release film 1 and the through holes 2a of the porous substrate 2. Thus, the shape of the leveling portion can be controlled.

[0053]

[Table 4]

Next, a sixth embodiment of the present invention will be described with reference to FIG. FIG. 8 is a cross-sectional view schematically showing a leveling head of a printing apparatus according to a sixth embodiment of the present invention and its vicinity.

In this embodiment, instead of the leveling head 12 shown in FIG. 1, the leveling head 22 shown in FIG.
Is provided. That is, the reverig head 22
Is a squeegee blade 23 having high hardness in the front side in the printing direction.
And a squeegee blade 24 having a low hardness is used on the rear side in the printing direction. In addition, similarly to the leveling head 12 shown in FIG. 1, a leveling head 22 is disposed above the release film 1, and the leveling head 22 is movable in the vertical direction and the printing direction.

A printing method using this printing apparatus will be described with reference to FIG. The part in contact with the release film 1 with the squeegee blade 23 having high hardness leaves a very small amount of the paste 3 on the surface of the release film 1,
The squeegee blade 23 having high hardness does not enter the opening of the through hole 2a of the porous base material 2, and the paste 3 is not scraped off. On the other hand, the portion in contact with the squeegee blade 24 having low hardness is deformed by the pressure, and the release film 1
The paste 3 is scraped from the surface in close contact with the surface, and the contact angle with the release film 1 is reduced due to the deflection of the contact portion, so that it is possible to suppress the penetration of the porous substrate 2 into the through-hole 2a. Thus, the paste 3 can be scraped from the surface of the release film 1 without scraping the paste 3 filled in the through holes 2a. When the contact angle with the release film 1 is small, the remaining paste 3
Is large, the paste 3 is left behind in the printing direction. However, due to the presence of the squeegee blade 23 having a high hardness in contact with the front of the leveling head 22, the paste 3 on the release film 1 is removed. It becomes possible to scrape only. When this state was observed, no depression was present in the shape of the opening (the through-hole 2a of the porous substrate 2) at the leveling portion.

Next, a seventh embodiment of the present invention will be described with reference to FIG. FIG. 10 shows the seventh embodiment of the present invention.
FIG. 3 is a cross-sectional view schematically showing a reverig head of a printing apparatus showing the embodiment of FIG.

In this embodiment, instead of the leveling head 12 shown in FIG. 1, the leveling head 2 shown in FIG.
5 are provided. In other words, this reverig head 25
Is formed with a curved convex surface 26 at a tip portion which comes into contact with the release film 1. In addition, similarly to the leveling head 12 shown in FIG. 1, a leveling head 25 is disposed above the release film 1, and the leveling head 25 can move in the vertical direction and the printing direction.

A printing method using this printing apparatus will be described with reference to FIG. At the time of leveling, the curved convex surface 26 at the tip of the leveling head 25 disperses the pressure applied from the leveling head 25 to the release film 1 side, and the curved convex surface 26 at the tip of the leveling head 25.
Can be made extremely small. The amount of deformation of the curved convex surface 26 at the tip of the leveling head 25 can be estimated to be about 200 to 500 μm with a general squeegee material and shape, although there is a difference in the material. There was no dent on the surface of the through hole 2a of the substrate 2.

[0060]

As described above, according to the present invention, the filling head for filling the through-hole with the paste and the leveling head for leveling the paste of the filled portion are separately provided, so that after filling, The residual paste can be leveled while being removed by a leveling head, and a sufficient filling force can be secured while being able to cope with the viscosity of various pastes widely.

The filling head is provided with a guide portion for collecting the paste and a stopper portion for holding the collected paste .
By dividing so as to move independently, it is possible to reduce the amount of paste not involved in filling and to reduce the amount of paste remaining on the printing surface.

Further, by independently controlling the force applied to the guide portion and the stopper portion, the effect of reducing the paste can be further enhanced. In addition, by making the filling head a cylindrical shape, the filling power to the paste can be improved and the flow of the paste can be forcibly caused, and further, a throat portion or a minute concave portion is formed in the filling head. Accordingly, the flow of the paste is disturbed, and the through-hole of the base material can be filled with the paste having a high viscosity.

Further, by adhering net-shaped fibers to the sweeping surface of the leveling head, leveling can be performed without depressing the printing surface of the filled paste, and the printing shape can be stabilized. Can be.

Further, by forming the leveling head by pasting a plurality of squeegees having different hardnesses from each other, two different leveling of the paste on the release film and the leveling of the paste on the through-hole can be improved. Can be performed.

Further, by forming a curved convex surface at a portion in contact with the printing surface of the leveling head, deformation of the squeegee can be reduced, and penetration of the squeegee edge into the through hole can be reduced. Thus, the printing shape can be stabilized.

As a printing method, the filling head is used.
Move the guide and stopper parts independently to
The paste is collected by the guide section and the collected paste is
Filled and held in the serial stopper portion, the filling of the carried part of the paste by Ru Reberingusu it is possible to select the respective optimum conditions, it is possible to select the most desirable print condition.

[Brief description of the drawings]

FIG. 1 is a sectional view schematically illustrating a printing apparatus according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view schematically illustrating a filling head of a printing apparatus according to a second embodiment of the present invention and a portion near the filling head.

FIG. 3A is a diagram schematically showing a force applied to a paste in a conventional technique as a comparative example. (B) is a diagram schematically showing the force applied to the paste in the printing apparatus according to the second embodiment of the present invention.

FIG. 4 is a cross-sectional view schematically showing a filling head of a printing apparatus according to a third embodiment of the present invention and a portion near the filling head.

FIGS. 5A and 5B are diagrams schematically showing behavior of a paste at the time of filling in the printing apparatus.

FIG. 6 is a cross-sectional view schematically illustrating a filling head of a printing apparatus according to a fourth embodiment of the present invention and a portion near the filling head.

FIG. 7 is a cross-sectional view schematically illustrating a leveling head of a printing apparatus according to a fifth embodiment of the present invention and a portion near the leveling head.

FIG. 8 is a cross-sectional view schematically illustrating a leveling head of a printing apparatus according to a sixth embodiment of the present invention and a portion near the leveling head.

FIG. 9 is a cross-sectional view schematically showing a leveling behavior of the leveling head.

FIG. 10 is a cross-sectional view schematically showing a leveling head of a printing apparatus according to a seventh embodiment of the present invention and a portion near the leveling head.

FIG. 11 is a cross-sectional view schematically showing a conventional first printing apparatus.

FIG. 12 is a cross-sectional view schematically illustrating a second conventional printing apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Release film 2 Porous base material (base material) 4a Through-hole 3 Printing paste 11, 13, 15, 17 Filling head 12, 19, 22, 25 Leveling head 13a Guide part 13b Stopper part 14 Pressure mechanism DESCRIPTION OF SYMBOLS 16 Throat part (groove part) 18 Micro recess 20 Revelig head main body 21 Fiber formed in a net shape 23 Squeegee blade with high hardness 24 Squeegee blade with low hardness 26 Curved convex surface

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Shoji Sato 1006 Kazuma Kazuma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-6-262375 (JP, A) −52475 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B41F 17/14 B41M 1/26 H05K 3/40

Claims (8)

(57) [Claims] 1. A printing apparatus in which a through-hole is provided in a base material provided with a release film, and wherein the through-hole is filled with a conductive paste, a filling head which fills the through-hole with a paste, A leveling head for leveling the filled portion of the paste, wherein the filling head is provided with a guide portion for collecting the paste and a stopper portion for holding the collected paste divided so as to move independently.
It is to have the printing device. 2. A guide portion and the printing apparatus according to claim 1, further comprising a control means for independently controlling the force applied to the stopper portion. 3. A through hole in a substrate provided with a release film.
Is provided, and the through-hole is filled with a conductive paste.
A printing apparatus, comprising: a filler for filling the through-hole with a paste.
Filling head and the paste of the filled part
The filling head is formed in a cylindrical shape, and a throat portion which is grooved in a lateral direction perpendicular to the printing direction is provided in a portion near a printing surface contributing to filling in the filling head . printing apparatus. 4. A through-hole formed in a substrate provided with a release film.
Is provided, and the through-hole is filled with a conductive paste.
A printing apparatus, comprising: a filler for filling the through-hole with a paste.
Filling head and the paste of the filled part
And a ring leveling head, the filling head is formed in a cylindrical shape, printing apparatus having a plurality of minute recesses to contribute print the vicinity portions to fill in the filling head. 5. A through hole in a substrate provided with a release film.
Is provided, and the through-hole is filled with a conductive paste.
A printing apparatus, comprising: a filler for filling the through-hole with a paste.
Filling head and the paste of the filled part
And a ring leveling head, the sweeping surface of the leveling head, printing apparatus was attached fibers were configured to mesh. 6. A through hole in a substrate provided with a release film.
Is provided, and the through-hole is filled with a conductive paste.
A printing apparatus, comprising: a filler for filling the through-hole with a paste.
Filling head and the paste of the filled part
And a ring leveling head, printing apparatus of the leveling head was formed <br/> pasted multiple squeegee hardness different from each other. 7. A through hole in a substrate provided with a release film.
Is provided, and the through-hole is filled with a conductive paste.
A printing apparatus, comprising: a filler for filling the through-hole with a paste.
Filling head and the paste of the filled part
A leveling head to be formed, and a curved convex surface is formed at a portion in contact with a printing surface of the leveling head.
Printing apparatus. 8. A head provided with a through hole in a base material provided with a release film, and filled with a conductive paste in the through hole.
In a printing method of filling, the guide portion and a stopper portion constituting the filling head Germany
And move it upright to collect the paste by the guide section.
Meta paste was filled and held by the stopper portion, printing method a paste of portions subjected to the filling Ru Reberingusu.