JPH03251A - Screen printing device - Google Patents

Abstract

PURPOSE:To make it possible to manufacture high-quality products by dividing the interior of a printing table into sections and installing a suction device in each section under independent control. CONSTITUTION:When paste 5 is applied in thick film to the surface of a substrate 1 from above a screen using a squeegee 6, the squeegee 6 is allowed to advance in an arrow A direction. Consequently, the paste 5 is sucked by a suction device 13-1 into through holes 7-1 to 7-3 in the first half stage of printing process for application. In the second half stage of printing process, the paste is sucked by a suction device 13-2 into through holes 8-1 to 8-3. In this case, it is possible to control the suction amount of the paste so that it becomes optimal for each through hole because the holes 7-1 to 7-3 work separately from those 8-1 to 8-3. Thus the inflow of the paste into the through holes is equalized to enable uniform printing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a screen printing device used as a manufacturing device for thick film printed circuit boards for hybrid ICs.

[Conventional technology]

An example of a conventional screen printing apparatus of this type is shown in FIG. 2, which is a sectional view of the conventional screen printing apparatus. In Fig. 2, 1 is a through-hole board for printing (substrate), and 2 is a printing table for fixing the board 1 (printing table).
, 3 is a suction device for suctioning and fixing the substrate 1 to the table 2, 4 is a screen for applying a predetermined circuit pattern to the substrate 1, 5 is a thick film paste), 6 is an application of the paste 5 Squeegee for 7-1, 7-2, 7-
3, 8-1, 8-2, and 8-3 are through holes in the substrate 1.

[Problem that the invention seeks to solve]

In the conventional screen printing apparatus as described above, the suction device 3 for the substrate 1 is located only at one location relative to the printing table 2, so when the substrate has many through holes, it is difficult to The strength of the suction varies greatly between the through holes 7-1 to 7-3 at the time when printing is performed while moving in the direction of arrow A) and the through holes 8-1 to 8-3 at the final stage of printing. There is a disadvantage that there is a difference in the amount of paste 5 flowing into the hole (at the end, the suction force becomes weaker, so the amount of paste flowing at the end is smaller), and printing is not uniform.

[Means for solving problems]

The screen printing apparatus of the present invention includes a substrate fixing printing table for fixing a substrate, a screen for supplying paste, and applying the paste to the substrate through the screen by suction from the substrate fixing printing table. A screen printing apparatus comprising a squeegee, a dividing plate that divides the paste suction part of the printing table for fixing the substrate into a plurality of parts, and a dividing plate that is provided in each of the plurality of divided parts and can be independently controlled. It is equipped with a plurality of suction devices.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

The first section is a sectional view showing an embodiment of the present invention.

In Figure 1, 1 is a through-hole board for printing (substrate)
, 12 is a printing table for fixing the substrate 1 (printing table)
, 4 is a screen for applying a predetermined circuit pattern to the substrate 1, 5 is a thick film paste (paste), 6 is a squeegee for applying the paste 5, 7-1, 7-2, 7-3, 8
-1, 8-2, and 8-3 are through holes in the substrate 1; 19 is a dividing plate provided approximately in the center of the printing table 12 for dividing the through holes in the substrate 1 into two for suction;
3-1 and 13-2 are suction devices for dividing and suctioning the substrate 1.

Using the screen printing apparatus configured as described above, the thick film paste (paste) 5 on the screen 4 is applied with a squeegee 6.
When coating the substrate 1, the squeegee 6 is moved in the direction of arrow A. As a result, in the first half of printing, the paste 5 is sucked and applied to the through holes 7-1 to 7-3 by the suction device 13-1. In the latter stages of printing, the suction section! It is sucked into the through holes 8-1 to 8-3 by 13-2 and applied.

In this case, through holes 7-1 to 7-3 and 8-1 to 8-
Since suction is carried out separately from 3, it is possible to manage the suction amount to be the optimum amount for each. Therefore, uniform printing can be performed by equalizing the amount of paste flowing into the through holes.

Although the above-mentioned embodiment is an example in which the inside of the print table is divided into two, it is also easy to divide the inside into three or more.

〔Effect of the invention〕

As explained above, the screen printing device of the present invention includes:
By dividing the inside of the printing table into multiple parts and providing a suction device in each part so that they can be controlled independently, the effect is that the amount of paste flowing into the through holes can be made uniform. Therefore, there is an effect that disconnection of the printed circuit can be prevented and production with stable quality can be performed.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view showing an example of a conventional screen printing machine. 1... Board, 2.12... Printing table, 3.13
-1・13-2...Suction device, 4...Screen,
5... Paste, 6... Squeegee, 7-1/7-2
・7-3・8-1・8-2・8-3...One through hole...Divided plate.

Claims (1)

[Claims] A screen printing apparatus comprising a substrate fixing printing table for fixing a substrate, a screen for supplying paste, and a squeegee for applying the paste to the substrate through the screen by suction of the substrate fixing printing table. , comprising a dividing plate that divides the paste suction section of the printing table for fixing the substrate into a plurality of parts, and a plurality of suction devices that are installed in each of the plurality of divided parts and can be independently controlled. A screen printing device characterized by: