JPWO2008140039A1 - Printing apparatus and printing method - Google Patents

Abstract

Provided are a printing apparatus and a printing method capable of printing without causing defective printing even on a non-planar printing surface. The printing apparatus 1 is a printing apparatus for screen printing that prints a paste 8 on a substrate 6 to be printed. A cylindrical body 2 that holds the paste 8 and a screen mask 3 for transferring the paste 8 having a predetermined pattern. And an internal pressure control unit 12 that controls the pressure inside the cylindrical body 2. The cylindrical body 2 has an open end that faces the substrate 6, and the screen mask 3 is mounted so as to cover the open end of the cylindrical body 2. When the screen mask 3 and the substrate 6 are brought into contact with each other and the internal pressure controller 12 presses the screen mask 3 with the paste 8, the screen mask 3 is deformed along the surface shape of the substrate 6 and the paste. 8 is transferred to the surface of the printing medium 6 through the screen mask 3. Thereby, it can print without a printing defect also with respect to a non-planar shape.

Description

[Description of related applications]
The present invention is based on the priority claim of Japanese patent application: Japanese Patent Application No. 2007-125623 (filed on May 10, 2007), the entire contents of which are incorporated herein by reference. Shall.
The present invention relates to a printing apparatus and a printing method used for screen printing.

  Conventionally, a wiring pattern used for an LSI package has been formed by a plating method using a photolithography technique. In the plating method, first, a copper thin film serving as a base of a wiring layer is formed on an insulating resin by sputtering or the like. Next, a photosensitive resin for forming an etching resist is applied by a spin coater or the like, and then the resin is exposed and developed using a photomask so as to form a pattern. Next, the resin other than the developing portion is removed to form an etching resist, and copper other than the etching resist portion is removed by etching to form a wiring pattern.

  In recent years, as a wiring pattern forming method that replaces the plating method, wiring is formed by printing and applying a conductive resin or conductive ink. For example, a wiring pattern made of a conductive resin can be formed by screen printing. According to this method, after printing, the wiring pattern can be formed simply by curing the conductive resin, so that there is an advantage that the process and time can be greatly shortened. Further, the wiring pattern technique based on the screen printing method is a so-called additive process, and is therefore an environment-friendly technique that does not generate a removal component such as copper or a waste liquid such as an etching solution.

  For example, Patent Document 1 discloses a printing apparatus that prints cream solder on a land of a circuit board by flat plate stencil (screen) printing. In this printing device, the screen mask is pressed by a scraping blade to eliminate the gap between the screen mask and the circuit board, and cream solder is sequentially filled from the discharge port of the chamber to each opening of the through hole of the screen mask. To do. Then, after filling, the blade is slid on the upper surface of the screen mask to scrape excess cream solder, and the screen mask is peeled off from the circuit board, whereby the cream solder filled in the through holes is transferred to the circuit board.

JP 2000-62138 A

It is assumed that the disclosure of Patent Document 1 described above is incorporated herein by reference. The following is an analysis of the related art according to the present invention.
In the screen printing method, it is generally desirable that the wiring formation target is a plane, and when the wiring formation target has a step or unevenness, the wiring may be defective.

  FIG. 5 is a schematic cross-sectional view showing a process according to the background art in which paste is transferred onto a step using a screen printing method. First, the screen mask 21 is disposed at a predetermined position with respect to the printing medium 26 (usually with a predetermined gap d) (FIG. 5A). Next, the squeegee 25 is moved together with the paste 24 on the screen mask 21 while pressing the screen mask 21 against the substrate 26 with the squeegee 25. As a result, the paste 24 is filled in the openings 23a of the emulsion 23, and the paste 24 filled in the openings 23a comes into contact with the substrate 26 (FIG. 5B). As the squeegee 25 moves, the paste 24 a filled in the opening 23 a is transferred onto the printing medium 26 when the contact portion of the screen mask 21 with the printing medium 26 moves away from the printing medium 26 ( FIG. 5 (c) right side).

  However, if the printing medium 26 has a step (unevenness) as shown in FIG. 5, the squeegee 25 may not move along the shape of the step. Then, the paste 24 filled in the opening 23a cannot contact the printing body 26 at the step portion (left side in FIG. 5C), and even if the screen mask 21 is separated from the printing body 26, the non-contact portion The paste 24 is not transferred, and a part of the paste 24b remains in the opening 23a (FIG. 5D). That is, as a result, disconnection occurs in the wiring pattern.

  In addition, when printing on a non-planar portion (for example, a stepped portion) by a printing apparatus as described in Patent Document 1, it is the same as squeezing on a screen mask at a paste filling discharge port (or scraping blade). Therefore, the screen mask cannot be deformed according to the non-planar shape, and disconnection similar to the problem described above with reference to FIG. 5 occurs.

  An object of the present invention is to provide a printing apparatus and a printing method capable of printing without causing printing defects even on a non-planar printing surface.

  According to a first aspect of the present invention, there is provided a printing apparatus for screen printing that prints a paste on a substrate. The printing apparatus includes a cylindrical body that holds a paste, a screen mask for transferring a paste having a predetermined pattern, and an internal pressure control unit that controls the pressure inside the cylindrical body. The cylindrical body has an open end that faces the substrate. The screen mask is mounted so as to cover the open end of the cylindrical body. When the cylindrical body holds the paste therein, the paste is configured to be held in contact with one surface of the screen mask. The screen mask follows the surface shape of the substrate by pressing one surface of the screen mask with a paste in a state where at least a portion of the other surface of the screen mask is in contact with at least a portion of the substrate. Deform.

  According to a second aspect of the present invention, there is provided a printing method for screen printing that prints a paste on a substrate. In the printing method, one surface of a screen mask for transferring a paste having a predetermined pattern is made to face the printed material while at least part of the surface is in contact with the printed material. By pressing the other surface of the screen mask through the paste, the shape of the screen mask is deformed along the surface shape of the printing medium. The paste that has passed through the screen mask is brought into contact with the substrate.

  According to the present invention, it is possible to print without causing a printing defect even on a printing medium having a non-planar shape (for example, unevenness or curved surface). Further, according to the present invention, it is not necessary to sequentially fill the individual openings of the screen mask with the paste, and it is possible to fill the individual openings with a single process. Can be realized.

1 is a schematic sectional view of a printing apparatus according to a first embodiment of the present invention. The expanded schematic sectional drawing of the principal part in FIG. The schematic sectional drawing of the printing apparatus which concerns on 2nd Embodiment of this invention. The principal part enlarged view of the printing apparatus shown in FIG. 1 for demonstrating the printing method of this invention. 1 is a schematic partial cross-sectional view for explaining a printing apparatus and a printing method according to background art.

Explanation of symbols

1 Printing device 2 Cylindrical body (cylinder)
2a Tank part 2b Chamber part 3 Screen mask 4 Mesh 5 Emulsion 5a Opening 6 Printed body 6a Step 7 Adsorption stage 8 Paste 8a Printed paste 10 Connector 10a Mounting part 10b Pressure feeding pipe 11 Printing device 12 Internal pressure control part 13 Holder 14 Support Part 15 Internal pressure control part 16 Piston 21 Screen mask 22 Mesh 23 Emulsion 23a Opening 24 Paste 24a Printed paste 24b Paste remaining in the opening 25 Squeegee 26 Printed material 27 Adsorption stage

  According to the preferable form of the first aspect, the paste covers all the openings of the screen mask through which the paste passes.

  According to the preferable form of the first aspect, the screen mask is stretched so as to return to the original shape when the pressing by the paste is stopped.

  According to the preferable form of the first aspect, the internal pressure control unit controls the internal pressure of the cylindrical body by the fluid in contact with the paste.

  According to the preferable form of the first aspect, the internal pressure control unit controls the internal pressure of the cylindrical body by the sliding body that slides in the cylindrical body.

  According to the preferred form of the second aspect, the shape of the screen mask is restored by reducing the pressure caused by the paste applied to the screen mask.

  According to the preferable form of the second viewpoint, after the paste contacts the printed body, the screen mask and the printed body are dissociated to transfer the paste onto the printed body.

  According to the preferred form of the second viewpoint, the entire other surface of the screen mask is pressed with a paste.

  According to the preferred form of the second aspect, the surface of the printing material facing the screen mask has a non-planar portion, and when the shape of the screen mask is deformed along the surface shape of the printing material, the paste The screen mask is arranged so that at least a part of the opening of the screen mask for allowing the screen to pass through the non-planar portion.

  According to the preferred form of the second aspect, the surface of the printing material facing the screen mask has irregularities, and before pressing with the paste, the screen mask and the higher surface of the irregularities are brought into contact with each other, and the screen is pressed by pressing the paste. The mask is brought into contact with the lower surface of the unevenness.

  According to a preferred form of the second aspect, the paste temperature is managed at a predetermined temperature.

  According to the preferred form of the second aspect, the pressure applied to the paste is controlled by the pressure in the container holding the paste.

  According to the preferred form of the second aspect, the pressure applied to the paste is controlled by mechanical pressing on the paste.

  A printing apparatus according to a first embodiment of the present invention will be described. FIG. 1 shows a schematic cross-sectional view of a printing apparatus according to the first embodiment of the present invention, and FIG. 2 shows an enlarged schematic view of the main part in FIG.

  The printing apparatus 1 includes a cylindrical body (cylinder) 2, a screen mask 3, an internal pressure control unit 12, and a support unit 14.

  The cylindrical body 2 holds the paste 8 and becomes a passage (conduit) for printing. The cylindrical body 2 holds the paste 8 and also has a tank portion 2 a serving as a passage for propagating the pressure from the internal pressure control unit 12 to the paste 8, and a chamber portion for filling the paste 8 supplied to the printing body 6. 2b, and the tank part 2a and the chamber part 2b are continuously formed with the inside communicating. The chamber part 2b has an open end that faces the substrate 6 and the open end faces the substrate.

  The screen mask 3 is mounted so as to cover the open end and so that one surface faces the printing medium 6. The other surface of the screen mask 3 is in contact with the entire surface of the paste 8 in the chamber portion 2 b, and the pressure applied to the paste 8 is applied to the screen mask 3 through the paste 8. As a result, when the other surface of the screen mask 3 is pressed with the paste 8 while one surface of the screen mask 3 is in contact with the substrate 6, the screen mask 3 follows the shape of the surface of the substrate 6 (surface shape). Can be deformed). Therefore, in order to increase the internal pressure in the cylindrical body 2 (that is, to apply pressure to the screen mask 3 via the paste 8), the paste 8 covers at least all the openings 5a of the screen mask 3. To do.

  The screen mask 3 has a mesh 4 and an emulsion 5, and the mesh 4 and the emulsion 5 are laminated. The emulsion 5 faces the substrate 6 and has openings (through holes) 5 a for forming a pattern of printed matter on the substrate 6. For the mesh 4 and the emulsion 5, the optimum material, size, shape, etc. are appropriately selected in consideration of the height difference on the surface of the substrate 6 to be printed, such as the width of the pattern to be printed, the viscosity and thixotropy of the paste 8. To do. In particular, it is preferable that the mesh 4 has a size that allows the screen mask 3 to be deformed according to the shape of the printing medium 6 by receiving pressure from the desired paste 8.

  The screen mask 3 has flexibility that can be deformed according to the surface shape of the substrate 6. Further, the screen mask 3 also has elasticity that can be recovered from the deformation according to the surface shape of the substrate 6 to the original shape. Therefore, the mesh 4 and the emulsion 5 are preferably made of materials that are difficult to plastically deform. Here, being hard to be plastically deformed means that the yield point (yield stress) is high. Therefore, the yield point of the mesh 4 and the emulsion 5 is preferably higher than the stress (load) applied to the mesh 4 and the emulsion 5 during printing. As a result, when the pressure from the paste 8 decreases, the screen mask 3 can return from the shape following the shape of the substrate 6 to the original shape before deformation. The emulsion 5 is preferably a material having low elasticity, and particularly preferably has a Young's modulus (for example, 10 GPa or less) smaller than that of a resin material used for electronic equipment. As the mesh 4 and the emulsion 5, for example, a mesh (for example, metal) and an emulsion (for example, a photosensitive emulsion) used when screen-printing a conductive paste on an electronic component in the electronic device field can be used.

  The internal pressure control unit 12 adjusts the pressure applied to the screen mask 3 from the paste 8, that is, adjusts the pressure applied to the paste 8 by controlling the internal pressure inside the cylindrical body 2. In the form shown in FIG. 1, the internal pressure control unit 12 adjusts the pressure inside the cylindrical body 2 with a fluid (for example, air) in contact with the paste 8. The internal pressure control unit 12 and the cylindrical body 2 are connected via a connector 10. The connector 10 has an attachment portion 10a for attachment to the cylindrical body 2 and a pressure supply pipe 10b for supplying pressure from the internal pressure control portion 12 to the cylindrical body 2, and when the internal pressure is applied to the cylindrical body 2 It is preferable to seal the connecting portion between the mounting portion 10a and the cylindrical body 2 so that the internal fluid does not leak to the outside. The fluid for applying pressure to the paste 8 inside the cylindrical body 2 may be gas (for example, air, nitrogen, etc.) or liquid (for example, oil) as long as desired printing can be realized. When it is not preferable that the fluid for applying pressure to the paste 8 and the paste 8 are in direct contact with each other, the paste 8 slides in the cylindrical body according to the internal pressure and does not contact the paste 8 and the fluid. Further, a shielding plate or a plug (not shown) for transmitting the internal pressure may be provided on the surface of the paste 8.

  The cylindrical body 2, the screen mask 3, and the internal pressure control unit 12 are preferably configured such that when the pressure is applied to the paste 8, the pressure of the paste 8 is uniformly applied to the surface of the screen mask 3. This is because if the pressure is applied to only a part of the screen mask 3 surface, the screen mask 3 may not be appropriately deformed according to the surface shape of the printing medium 6.

  The support portion 14 supports (for example, holds) the cylindrical body 2, and the cylindrical body 2 is supported by a holder 13 included in the support portion 14. At least one of the support portion 14 and the suction stage 7 that holds the printing medium 6 is a position control mechanism (not shown) that controls the relative position of the screen mask 3 (that is, the cylindrical body 2) with respect to the printing medium 6. Have The position control mechanism adjusts the position in the horizontal (horizontal) direction of the screen mask 3 with respect to the surface of the printing medium 6 and the position in the vertical (vertical) direction of the screen mask 3 with respect to the surface of the printing body 6. And a longitudinal adjustment mechanism. The horizontal direction adjusting mechanism and the vertical direction adjusting mechanism may be separately disposed on the support portion 14 and the suction stage 7, or may be disposed on either or both together. Further, a position detection mechanism (not shown) (for example, a camera or the like) that detects the position of the screen mask 3 with respect to the printing medium 6 may be provided in order to align the screen mask 3 and the printing medium 6.

  The paste 8 is printed on the substrate 6 and can be discharged from the opening 5 a of the screen mask 3 according to the internal pressure of the cylindrical body 2. Preferably, the paste 8 is applied to the substrate 6. On the other hand, it has little sagging and blurring. When wiring is formed by printing, examples of the paste 8 include metal (for example, gold, silver, copper, etc.) fine particle paste, conductive resin, and conductive ink (organic in which conductive fine particles are dispersed). Inorganic composite materials can be used. In particular, when forming a high-density wiring with a narrow pitch between wirings, it is preferable to use a conductive paste or conductive ink containing metal fine particles having a particle diameter of about 20 nm or less as at least a part of the paste 8. According to such a paste 8, not only can the pitch be reduced, but also the conductivity can be improved at the same time by fusing metal fine particles.

  When the viscosity of the paste 8 is greatly changed by applying pressure, the printing apparatus 1 is configured so that the amount of the paste 8 in the cylindrical body 2 can be adjusted (in this case, reduced). A paste amount control unit (not shown) for adjusting the amount of paste 8 in the cylindrical body 2 may be further provided.

  The printing apparatus 1 may further include a temperature control mechanism (not shown) that controls the temperature of the paste 8 in at least one of the tank unit 2a and the chamber unit 2b in order to adjust the viscosity of the paste 8. .

  Next, a printing apparatus according to the second embodiment of the present invention will be described. FIG. 3 is a schematic sectional view of a printing apparatus according to the second embodiment of the present invention. In FIG. 3, the same elements as those in the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals.

  In the first embodiment, pressure is applied to the paste 8 in the cylindrical body 2 by a fluid such as air. However, in the present embodiment, the paste 8 is machined by a sliding body that slides in the cylindrical body 2. Press directly and directly. Therefore, the printing apparatus 11 according to the second embodiment includes a piston 16 and an internal pressure control unit 15 as sliding bodies instead of the internal pressure control unit 12 and the connector 10 in the first embodiment. Other configurations of the printing apparatus 11 according to the second embodiment are the same as those of the printing apparatus 1 according to the first embodiment as described above.

  The piston 16 is in close contact with the inner surface of the cylindrical body 2 without any gap, and preferably the paste 8 does not leak upward from the piston 16 even when the paste 8 is pressed. The internal pressure control unit 15 moves the piston 16 up and down (slids) along the cylindrical body 2, and by appropriately controlling the amount of movement, the pressure applied to the paste 8, that is, the pressure applied to the screen mask 3 , Adjust. The piston 16 may be in direct contact with the paste 8, or when direct contact is not desirable, a shielding plate or a plug may be interposed therebetween.

  According to the printing apparatus of the present invention, printing can be performed without using transfer by a squeegee. In addition, according to the printing apparatus of the present invention, printing can be performed after causing the screen mask 3 to follow the surface shape of the printing medium 6, and printing failure of a non-planar shape portion (for example, a step, unevenness or curved surface) ( For example, transfer omission, bleeding, etc.) can be prevented. Furthermore, according to the printing apparatus of the present invention, a wide range can be printed by one printing.

  Next, the printing method of the present invention will be described using the printing apparatus according to the first embodiment shown in FIG. 1 as an example. FIG. 4 is an enlarged view of a main part of the printing apparatus shown in FIG. 1 for explaining the printing method of the present invention.

  First, a desired screen mask 3 is set on the cylindrical body 2 and a desired paste 8 is filled in the cylindrical body 2. A desired substrate 6 is disposed on the suction stage 7.

  The printing medium 6 has a non-planar portion, and in the form shown in FIG. 4, it has a step 6a as the non-planar portion. The surface of the printing medium 6 is preferably one that is less likely to cause bleeding of the paste 8 to be printed (more preferably, one that does not cause bleeding). Moreover, when forming a wiring pattern, the surface of the to-be-printed body 6 is an insulating resin, and any material may be used as long as the conductive paste can be printed.

  Next, the screen mask 3 and the printing medium 6 are aligned in the horizontal direction using a position control mechanism (not shown) or a position detection mechanism (not shown). In the form shown in FIG. 4, the position is adjusted so that at least a part of the opening 5a is disposed on the step 6a (FIG. 4A).

  Next, the vertical position of at least one of the cylindrical body 2 and the screen mask 3 is adjusted to bring the screen mask 3 and the high surface of the substrate 6 into contact (FIG. 4B). At this time, a part of the opening 5 a is hung on the high surface of the substrate 6.

  Next, the internal pressure control unit 12 increases the pressure inside the cylindrical body 2 and presses the entire one surface of the screen mask 3 with the paste 8. As a result, the screen mask 3 is deformed along the surface shape of the printing medium 6 and is in contact with portions other than the high-level surface of the printing medium 6. At this time, the screen mask 3 (emulsion 5) surface around the opening 5a comes into contact with the printing medium 6 (that is, a part of the opening 5a is applied to the lower surface of the printing medium 6). At the same time, the paste 8 is filled into the opening 5a through the mesh 4, and the paste 8 comes into contact with the surface of the printing medium 6 (FIG. 4C). Since the opening 5a facing the step 6a faces the step 6a from the high surface to the low surface of the step 6a, the paste 8 also extends from the high surface to the low surface along the shape of the step 6a. Will be in contact.

  At this time, it is preferable that the screen mask 3 and the substrate 6 are in contact with each other so as not to cause a printing defect (transfer omission, paste leakage, etc.). For example, it is preferable that a uniform pressure is applied to the contact surface between the screen mask 3 and the substrate 6 as a whole.

  At this time, when the viscosity of the paste 8 is low or the opening ratio of the opening 5 a is high, the paste 8 flows out from the opening 5 a even if the pressure of the paste 8 is increased, and the screen mask 3 is removed from the substrate 6. There is a possibility that it does not deform depending on the shape. In such a case, in the position adjustment of the height before increasing the internal pressure of the cylindrical body 2, not only the screen mask 3 and the high surface of the substrate 6 are brought into contact but also the high level of the substrate 6 to be printed. The screen mask 3 and the substrate 6 are brought closer to each other so as to press the screen mask 3 with the surface, and the lower surface of the substrate 6 is brought into contact with the screen mask 3. May be raised. Alternatively, the pressing force of the paste 8 may be increased by using the paste 8 having a higher viscosity or using the mesh 4 having a lower opening ratio. Alternatively, the viscosity of the paste 8 may be increased by lowering the temperature of the paste 8 by a temperature adjusting mechanism (not shown). Naturally, a plurality of these measures may be combined.

  At the time of printing, the viscosity of the paste 8 may change due to a change in the outside air temperature. Therefore, the temperature of the paste 8 or the cylindrical body 2 may be controlled to be kept constant at a predetermined temperature by a temperature adjustment mechanism.

  The method of pressing the screen mask 3 with the paste 8 may be a method of increasing the pressure inside the container (for example, air) that holds the paste 8 or a method of mechanically pressing the paste 8 in the direction of the screen mask 3 with a piston or the like. But you can.

  Next, the pressure of the paste 8 applied to the screen mask 3 is gradually reduced (preferably, the internal pressure of the cylindrical body 2 is returned to atmospheric pressure or negative pressure). As a result, the screen mask 3 gradually returns to its original shape, and the lower surface of the printing medium 6 and the screen mask 3 are dissociated. As a result, the paste 8a is partially peeled from the mesh 4 in the opening 5a where the printed material 6 and the screen mask 3 are dissociated, and transferred onto the printed material 6 (FIG. 4D). .

  Next, at least one of the screen mask 3 and the printing medium 6 is gradually moved so that the screen mask 3 and the printing medium 6 are separated. As a result, the paste 8a is completely peeled off from the mesh 4 and transferred onto the substrate 6 (FIG. 4 (e)).

  Finally, the paste 8a on the printing medium 6 is appropriately cured by a suitable method.

  According to the printing method of the present invention, a printing defect (for example, transfer omission, blurring, etc.) does not occur even on a non-planar substrate (for example, a substrate having a step, unevenness, or curved surface). Can be printed. Further, according to the printing method of the present invention, it is possible to print a wide range by a single process.

  The printing apparatus and the printing method of the present invention can be applied not only when the wiring is formed by printing, but also when, for example, a solder paste or a conductive paste is printed on the component mounting pad portion for component mounting. it can.

  Although the printing apparatus and the printing method of the present invention have been described using the above-described embodiment, the printing apparatus and the printing method of the present invention are not limited to the above-described embodiment, and various modifications are possible within the scope of the present invention. It goes without saying that changes and improvements can be included. Various combinations and selections of various disclosed elements are possible within the scope of the claims of the present invention.

Claims (14)

A printing device for screen printing that prints a paste on a substrate,
A cylindrical body for holding the paste;
A screen mask for transferring a paste of a predetermined pattern;
An internal pressure control unit for controlling the pressure inside the cylindrical body,
The cylindrical body has an open end facing the substrate to be printed,
The screen mask is mounted so as to cover the open end of the cylindrical body,
When the cylindrical body holds the paste therein, the paste is configured to be held in contact with one surface of the screen mask,
The screen mask is formed by pressing the one surface of the screen mask with the paste in a state where at least a part of the other surface of the screen mask is in contact with at least a part of the substrate. The printing apparatus is characterized by being deformed along the surface shape.   The printing apparatus according to claim 1, wherein the paste covers all openings of the screen mask through which the paste passes.   The printing apparatus according to claim 2, wherein the screen mask is stretched so as to return to an original shape when the pressing by the paste is stopped.   The printing apparatus according to claim 1, wherein the internal pressure control unit controls an internal pressure of the cylindrical body by a fluid in contact with the paste.   The printing apparatus according to claim 1, wherein the internal pressure control unit controls an internal pressure of the cylindrical body by a sliding body that slides in the cylindrical body. A printing method for screen printing that prints a paste on a substrate,
One surface of a screen mask for transferring a paste of a predetermined pattern is opposed to the printing body while at least partly contacting the printing body,
By pressing the other surface of the screen mask through a paste, the shape of the screen mask is deformed along the surface shape of the printed material, and the paste that has passed through the screen mask is applied to the printed material. A printing method characterized by contacting.   The printing method according to claim 6, wherein the shape of the screen mask is restored by reducing the pressure applied by the paste applied to the screen mask.   8. The paste is transferred onto the printing body by dissociating the screen mask and the printing body after contact of the paste with the printing body. Printing method.   The printing method according to any one of claims 6 to 8, wherein the entire other surface of the screen mask is pressed with the paste. The surface of the printing material facing the screen mask has a non-planar portion,
When the shape of the screen mask is deformed along the surface shape of the printing body, at least a part of the opening of the screen mask for allowing the paste to pass is applied to the non-planar portion. A printing method according to any one of claims 6 to 9, wherein a screen mask is disposed. The surface of the printing material facing the screen mask has irregularities,
Before pressing with the paste, the screen mask and the high surface of the unevenness are brought into contact,
The printing method according to claim 6, wherein the screen mask and the lower surface of the unevenness are brought into contact with each other by pressing the paste.   The printing method according to claim 6, wherein the temperature of the paste is controlled to a predetermined temperature.   The printing method according to any one of claims 6 to 12, wherein the pressure applied to the paste is controlled by the pressure in a container that holds the paste.   The printing method according to any one of claims 6 to 12, wherein the pressure applied to the paste is controlled by mechanical pressing on the paste.

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