JP2001334634A - Printing method and printer using same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suitably print a printing pattern on a printing surface of a base plate from a transfer surface of a film. SOLUTION: The transfer surface of the film 6 is opposed on the printing surface of the base plate 10, a spacer 13 projected to the film 6 side is provided on an outer peripheral part of the plate 10, air between the film 6 and the plate 10 is then exhausted from a suction port 12 provided at the outer periphery of the plate 10 and the spacer 13 part, a superposed unit of the film 6 and the plate 10 is thereafter pressurized, and thereby a printing pattern provided on the transfer surface of the film 6 is transferred to the printing surface of the plate 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a printing method for transferring a printing pattern provided on a transfer surface of a film to a printing surface of a substrate, and a printing apparatus using the same.

[0002]

2. Description of the Related Art A conventional printing method of this kind is as follows. That is, printing is performed such that the transfer surface of the film is opposed to the print surface of the substrate, the substrate and the film are polymerized, and the print pattern provided on the transfer surface of the film is transferred to the print surface of the substrate. Had become.

[0003]

A problem in the above-mentioned prior art is that a portion of the printed pattern provided on the transfer surface of the film cannot be transferred onto the printed surface of the substrate. That is, in order to perform this printing as described above, the transfer surface of the film and the print surface of the substrate are superposed and polymerized. In this case, a part of the transfer surface of the film and a part of the print surface of the substrate are used. In the area where the air bubbles remain, the transfer surface of the film and the printed surface of the substrate do not come into close contact with each other, and in this part, the printed pattern is not transferred from the film to the substrate. Printing failure occurred in some parts. Accordingly, an object of the present invention is to enable appropriate printing.

[0004]

In order to achieve this object, according to the present invention, a transfer surface of a film is opposed to a printing surface of a substrate, and a spacer is provided on an outer peripheral portion of the substrate so as to protrude toward the film. Then, the air between the film and the substrate is exhausted from the suction port provided in the portion between the outer periphery of the substrate and the spacer, and then the printing pattern provided on the transfer surface of the film is formed by pressing the polymer of the film and the substrate. It is designed to be transferred to the printing surface.

That is, when the printed surface of the substrate and the transfer surface of the film are brought into close contact with each other, the central portion of the film first comes into contact with the substrate by exhausting air from the suction port provided in the outer periphery of the substrate and the space between the spacers. And this contact state spreads to the outer peripheral portion with the discharge of air, that is,
Since the air is gradually discharged from the central portion toward the outer peripheral portion, no air bubbles remain in the portion between the printed surface of the substrate and the transfer surface of the film, and as a result, the printed surface of the substrate is reduced. The transfer surface of the film and the transfer surface of the film can be formed in close contact with each other, so that appropriate printing can be performed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a transfer surface of a film is opposed to a printed surface of a substrate, and a spacer protruding toward the film is provided on an outer peripheral portion of the substrate. The air between the film and the substrate is exhausted from the suction port provided on the outer periphery of the substrate and the space between the spacers, and then the polymer on the film and the substrate is pressed to apply the print pattern provided on the transfer surface of the film to the print surface of the substrate This is a printing method for transferring, in which air is exhausted from a suction port provided in a portion between an outer periphery of a substrate and a spacer, so that a central portion of the film first contacts a printing surface of the substrate, and in this state, the air is discharged. The contact portion of the lever gradually spreads toward the outer peripheral portion of the substrate, and finally, the printed surface of the substrate and the transfer surface of the film come into close contact with each other. It is not, thereby printing pattern provided on the transfer surface of the film is become to be suitably printed with the printing surface of the substrate.

According to a second aspect of the present invention, there is provided the printing method according to the first aspect, wherein the amount of air discharged from the suction port is gradually reduced at the initial stage of suction and thereafter gradually increased. By reducing the amount of air exhausted from the initial stage of suction, the central part of the film can smoothly contact the printed surface of the substrate, and from this state the close contact state spreads to the outer peripheral part Therefore, bubbles are less likely to be formed.

On the other hand, if a large amount of air is to be discharged from the initial stage of suction, a large suction force acts on the entire film, thereby causing a so-called flapping of the film itself. First, it does not come into contact with the printed surface of the substrate, and the state of adhesion between the substrate and the film is formed from a very unstable state, and in such a state, bubbles will remain there is a possibility.

On the other hand, when the amount of air discharged at the initial stage of suction is reduced as described above, the film does not flutter, and the center portion first comes into contact with the printing surface of the substrate, and then gradually smoothly toward the outer periphery. As a result, air is smoothly discharged in the outer peripheral direction, so that no air bubbles remain and printing can be performed properly.

A third aspect of the present invention provides a substrate stage for fixing a substrate, a film stage for disposing a film on the substrate stage, and a film stage provided on an outer peripheral portion of a substrate fixing portion of the substrate stage. The film stage is configured to hold an outer periphery of the film, and a printing apparatus is provided with a suction port in an outer peripheral portion of a substrate fixing portion of the substrate stage, wherein the film stage holds an outer periphery of the film. In this state, if the substrate stage and the film stage are brought closer to each other, they are brought closer to each other via the spacer, and in this state, air can be discharged from the suction port provided in the outer peripheral portion of the substrate fixing portion of the substrate stage. In this case, the central portion of the film comes into contact with the substrate while being curved toward the printing surface of the substrate provided on the substrate fixing portion of the substrate stage. If, in this state, the discharge of air is further continued, the contact portion spreads in the outer peripheral direction around that point, that is, the contact between the film and the substrate is performed while discharging air in the outer peripheral direction, As a result, the print pattern provided on the transfer surface of the film is appropriately printed on the print surface of the substrate.

Next, in the invention according to claim 4 of the present invention, the spacer is a mechanism having flexibility, and the spacer itself has flexibility. The spacer has flexibility when the contact between the film and the printing surface reaches the outer peripheral portion, and the spacer is flexible, so that the outer peripheral portion of the film can smoothly reach the outer peripheral portion of the substrate. , So that printing on the outer peripheral portion is appropriately performed.

According to a fifth aspect of the present invention, there is provided the printing apparatus according to the third aspect, wherein the spacer has air permeability. The air flow between the film and the substrate also occurs from the part, and as a result, the speed at which the central part of the film comes into contact with the printed surface side of the substrate is gentle, which causes the film to flutter. As described above, the central portion of the film smoothly contacts the central portion of the substrate first, and from that state, the contact surface spreads in the outer peripheral direction, whereby the printing pattern provided on the transfer surface of the film is printed on the substrate. It will be printed appropriately on the surface.

Further, even if the spacer is provided with air permeability,
At the end of the suction, the air-permeable portion of the spacer itself is in a state in which the spacer is compressed, so that the air permeability becomes smaller than the initial state, so that even if the spacer is provided with air-permeability. The suction force between the film and the substrate is not largely destroyed, and printing from the film to the substrate is performed appropriately.

Next, the invention according to claim 6 of the present invention is the printing apparatus according to claim 3, wherein a pump is connected to the suction port via a suction path, and an on-off valve is connected to the suction path. By controlling the opening of the on-off valve by connecting the on-off valve to the suction port, the suction force acting between the film and the substrate is adjusted. Part can first be brought into contact with the central part of the substrate, and then the contact can be gradually expanded toward the outer periphery,
Appropriate printing from the film to the substrate is performed.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a substrate stage, and the substrate stage 1 has a heater 2 provided therein. A heat insulating material 3 is provided on the lower surface side of the heater 2. The substrate stage 1 is placed on the XY table 4. A film stage 5 is provided on the substrate stage 1. This film stage 5
Has a frame shape, and has a shape such that the film 6 is suction-held on the lower surface side as shown in FIG.

That is, a suction port 7 and a suction path 8 connected to the suction port 7 are connected to the frame portion of the film stage 5 as shown in FIG. Further, the substrate stage 1 is also provided with a plurality of suction ports 9 at the center as shown in FIG. The suction port 9 is for sucking the substrate 10, and a suction path 11 is also connected to the suction port 10. Further, as shown in FIG. 4, a plurality of suction ports 12 are provided in the outer peripheral portion of the substrate 10.

Further, as shown in FIG. 1, a spacer 13 formed of, for example, a silicon tube or the like is provided on the substrate stage 1 at the outer peripheral portion of the suction port 12.
A suction path 14 is connected to the suction port 12, and the suction paths 8, 11, and 14 are connected to a vacuum pump 15. However, in the connection portion, first, the suction path 8
, The on-off valve 16, the on-off valve 14 on the suction path 14,
Further, an on-off valve 18 is interposed in the suction path 11.

Further, an on-off valve 19 is connected to the suction path 14 and the on-off valve 17. In such a state, the substrate 10 is first fixed on the substrate stage 1 by suction of the suction port 11 as shown in FIG. The film 6 is fixed by the suction force of the suction port 7. In this case, as shown in FIGS. 2 and 3, the film 6 is a film in which a conductive paste 6b is filled in a concave portion 6a for forming the print pattern and is set on the film stage 5 as shown in FIG. Although not described in detail, the film stage 5 and the substrate stage 1 are positioned as shown in FIG.

Next, in this state, the film stage 5 is lowered as shown in FIG. 6 until the spacer 13 is slightly curved. As a result, a closed space is formed between the film 6 and the substrate 10. By opening the on-off valve 17 in this state, the vacuum pump 15 sucks air from this space through the suction port 12 and the suction path 14. In this case, by opening the on-off valve 19, the suction force to the space provided between the film 6 and the substrate 10 is prevented from becoming sudden.

That is, if the on-off valve 19 is opened, the air sucked into the vacuum pump 15 by the inflow of air from the on-off valve 19 reduces the amount of air sucked from the portion between the film 6 and the substrate 10. Will do. As a result of such a small amount of suction acting on the film 6, FIG.
As shown in (1), no so-called flapping phenomenon occurs in the film 6, and the central portion of the film 6 is not held by the film stage 5, so that the film 6 is lowered and eventually comes into contact with the substrate 10. When the on-off valve 19 is gradually closed in this state, the suction force applied between the film 6 and the substrate 10 increases, and the film 6 is brought into close contact with the entire periphery of the substrate 10 as shown in FIG. Becomes

In this state, since the substrate stage 1 is provided with the heater 2 as described above, heat is transmitted in this portion, and the adhesive provided on the substrate 10 is thereby softened. Thus, even if the suction force by the vacuum pump 15 is released, the close contact state is not broken. Therefore, when the film 6 and the substrate 10 are adhered to each other and heated and pressed by a press in a state where the two are superposed, the print pattern provided on the film 6 is transferred to the substrate 10. Become.

[0023]

As described above, according to the present invention, the transfer surface of the film is opposed to the printed surface of the substrate, and a spacer protruding toward the film is provided on the outer peripheral portion of the substrate. The air between the film and the substrate is exhausted from the suction port provided in the part, and then the polymer of the film and the substrate is pressed, so that the printing pattern provided on the transfer surface of the film is transferred to the printing surface of the substrate by a printing method. Then, the center portion of the film is first brought into contact with the center portion of the substrate, and the contact portion is gradually expanded in the outer peripheral direction, that is, the film is brought into contact with the substrate while discharging air in the outer peripheral direction. So that no air bubbles remain between them, so that the substrate and the film adhere properly,
As a result, printing is properly performed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of one embodiment of the present invention.

FIG. 2 is a sectional view of a film.

FIG. 3 is a sectional view of a film.

FIG. 4 is a plan view of a substrate stage.

FIG. 5 is a sectional view showing a substrate stage and a film stage.

FIG. 6 is a sectional view showing a substrate stage and a film stage.

FIG. 7 is a sectional view showing a substrate stage and a film stage.

FIG. 8 is a sectional view showing a substrate stage and a film stage.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate stage 2 Heater 3 Insulating material 4 XY table 5 Film stage 6 Film 6a Concave part for making a print pattern 6b Conductive paste 7 Suction port 8 Suction path 9 Suction port 10 Substrate 11 Suction path 12 Suction port 13 Spacer 14 Suction path 15 Vacuum pump 16 On-off valve 17 On-off valve 18 On-off valve 19 On-off valve

Claims (6)

[Claims] 1. A transfer surface of a film is opposed to a printing surface of a substrate, and a spacer is provided on an outer peripheral portion of the substrate so as to protrude toward the film. And exhaust air between the board and
A printing method in which the printing pattern provided on the transfer surface of the film is transferred to the printing surface of the substrate by pressing the polymer between the film and the substrate. 2. The printing method according to claim 1, wherein the amount of air discharged from the suction port is small at the beginning of suction and gradually increased thereafter. 3. A substrate stage for fixing a substrate, a film stage for disposing a film on the substrate stage, and a spacer provided on an outer peripheral portion of a substrate fixing portion of the substrate stage, wherein the film stage is a film stage. A printing apparatus, wherein a suction port is provided in an outer peripheral portion of a substrate fixing portion of the substrate stage. 4. The printing apparatus according to claim 3, wherein the spacer is a mechanism having flexibility. 5. The printing apparatus according to claim 3, wherein the spacer has air permeability. 6. The printing apparatus according to claim 3, wherein a pump is connected to the suction port via a suction path, and an on-off valve is connected to the suction path.