JPH0421443A - Printing machine - Google Patents

Abstract

PURPOSE:To form a stable conductor layer on an internal wall of a through hole on a material to be printed by setting the size of a hole through which air passes by suction after changing it optionally by combining a main current plate and an auxiliary current plate, each having air current adjustment holes of a printing machine equipped with a suction-type printing table. CONSTITUTION:A main current plate 9 has main air current holes provided at an equal interval and auxiliary current plates 11, each having auxiliary air current adjustment holes 12 provided at the same interval as on the main air current plate 9, are stacked on the main current plate 9 horizontally so that the plates can move. The main current plate 9 and the auxiliary current plates 11 are mounted in a printing table 8, and a support plate 6 with a hole which matches a through hole of a material to be printed 7 is attached on the top of the printing table 8. The material 7 is placed on the support plate 6, then a conductive ink is printed on the material and the material is sucked from the lower part of the printing table 8. Subsequently, the conductive ink is sucked into the through hole 8a of the material 7 to form a conductive layer. In this case, the overlapped state of the air current adjustment holes 10, 12 is controlled by moving the auxiliary current plates 11 so that a suction power is applied evenly to the through hole 7a.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a printing machine for forming a conductive layer on the inner wall of a through hole in a multilayer board.

BACKGROUND OF THE INVENTION In recent years, with the demand for high-density mounting of components on multilayer boards, there has been a demand for highly multilayer boards with higher wiring pattern accuracy.

A conventional printing machine for forming conductor portions on the inner walls of through holes in multilayer substrates will be described below.

Figures 4 and 6 show the structures of two types of rectifier plates used in conventional printing presses. In Figure 4, 1 is a rectifier plate, 2 is a rectifier hole; A required number of holes of the same diameter are provided in the current plate 1 at equal intervals.

In addition, in Fig. 5, 3 is a rectifying plate, 4 is a large rectifying hole, and 6 is a rectifying plate.
are small rectifying holes, the large rectifying hole 4 is provided almost on the outer periphery of the rectifying plate 3, and the small rectifying hole 6 is provided near the center.

FIG. 6 is a diagram showing the structure of the main parts of a conventional printing press. In the figure, 6 is a supporting plate, 7 is a printing material having a large number of through holes 7a, 8 is a printing table, and 8a is a printing plate 8. This is a suction hole that opens at the bottom. The rectifier plate 1 or 3 is mounted inside the printing table 8 below the support plate 6 with a constant distance e therebetween.

The operation will be explained below.

A support plate 6 having a large number of necessary holes, on which a substrate 7 having a necessary number of through holes 7a is placed on the top surface of a printing table 8.
Print on top of. Next, by suctioning air in the direction of the arrow through the suction hole 8a provided at the bottom of the stamp side stand 8, the printed conductive ink (not shown) is drawn downward through the through hole 7a of the printing substrate 7. It is applied to the inner wall of the through hole 7a of the printing target to form a conductive layer.

Problems to be Solved by the Invention However, in the conventional configuration described above, in the case of the rectifying plate 1, since the size and spacing of the rectifying holes 2 are constant, the portion of the printing table 8 close to the suction hole 8a is strongly attracted, and the peripheral portion is become weak.

Next, when the current plate 3 is used, the suction strength of the conductive ink is stabilized by the difference in size between the holes 4 and 5 between the circumferential part and the central part of the current plate 3, but When the density of the provided null-holes 7a changes, the amount of conductive ink applied to the inner walls thereof becomes unstable. In other words, the current plate 1
Even if the size and spacing of the rectifying holes 2, 4, and 6 in 3 are changed, if the density of the through holes 7a provided in the printing substrate 7 is not constant, the suction force will partially change. The problem was that the coating amount was unstable and it was difficult to form a uniform conductor layer.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a printing machine that can form a conductive layer that is homogeneous and has excellent reliability.

Means for Solving the Problems In order to achieve the above object, the present invention provides a printing press having a suction type printing bed, which includes a main current plate having a plurality of main flow regulating holes and a plurality of sub-flow current plates inside the printing bed. A plurality of sub-straightening plates having rectifying holes are provided in a plane, and the sub-straightening plates are movable in sliding contact with the main rectifying plate, so that the pulling force can be partially adjusted.

Function: With the above-described configuration, the present invention can arbitrarily combine the main rectifier plate and the sub-straightener plate to arbitrarily change the size of the holes through which air passes during suction. Proper and uniform suction power can be obtained,
Therefore, a stable conductive layer can be formed on the inner wall of the through hole of the printing material.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 shows a combination structure of a main current plate and a sub current plate in an embodiment of the present invention. In the figure, 9 is a main current plate, 1o is a main current hole, 11 is a sub current plate, and 12 is a main current plate. This is a sub-straightening hole. Main rectifier holes 1o are provided in the main rectifier plate 9 at equal intervals, and a plurality of sub-rectifier plates 11 are movably stacked on top of the main rectifier holes 1o. The sub-straightening plate 11 is provided with sub-straightening holes 12 at the same intervals as the main rectification plate 9.

The size of the sub-straightening hole 12 may be the same as or different from the main straightening hole 10.

FIG. 2 is an enlarged view showing the positional relationship between one of the sub-straightening plates 11 and the main rectifying plate 9 in that part. This shows a state in which the main rectifying hole 1o and the sub-straightening hole 12 are misaligned. Second
Figures 1 and 2C are cross-sectional views of a state in which the main rectifying hole 1o and the sub-regulating hole 12 are aligned and a state in which they are deviated, respectively, and it can be seen that the area through which air passes during suction can be arbitrarily changed.

FIG. 3 is a diagram showing the structure of the main parts of the printing press in this embodiment, and the same parts as in the conventional example shown in FIG. 6 are given the same numbers. That is, in the present invention, a current plate 9.11 is placed in the printing table 8 instead of the current plate 1.3.

Next, its operation will be explained.

As shown in FIGS. 1 and 2, when a plurality of sub-straightening plates 11 are moved on the main rectifying plate 9 in a plane, the main rectifying holes 1
If the o and the sub-straightening holes 12 shift and close together, it becomes difficult for the sucked air to pass through.

To further explain this operation using FIG. 3, the printing table 8
A sub-straightening plate 11 that is movable in sliding contact with the main rectification plate 9 is mounted inside the main rectification plate 9, and a substrate 7 to be printed is mounted on the upper part of the printing table 8.
A support plate 6 with holes corresponding to the through holes is attached, and a printing medium 7 with a required number of null holes 7a is placed thereon. In this state, when conductive ink (not shown) is printed on the printing material 7 and sucked through the suction hole 8a provided at the bottom of the printing table 8, the conductive ink flows into the through hole 7a of the printing material 7. It is sucked in and forms a conductive layer on the inner wall of the through-hole a. At this time, if the distribution density of the through holes 7a of the printing material 7 differs within the area of the main current plate 9, the suction force in the null holes 7a of the printing material 7 will change, making it impossible to form a stable conductor layer. In order to keep this suction force constant, the sub-straightening plate 11 is moved, the position with respect to the main rectification plate 9 is adjusted, and the overlapping degree of the main rectification hole 1o and the sub-straightening hole 12 is controlled to adjust the suction force to the printing material. It is made to be constant for any null-hole (Via) of 7.

In this way, according to the above embodiment, the suction force is adjusted depending on the degree of overlapping of the rectifying holes of the main rectifier plate 9 and the sub-straightener plate 11, and the conductive ink is uniformly applied to the inner wall of the through hole 7a of the printing medium 7. Therefore, it is possible to form a highly reliable conductor layer.

The main rectifying holes 1o provided in the main rectifying plate 9 are equally spaced, and the size and spacing thereof can be set as necessary. 9
Set up accordingly. The size of the sub-straightening hole 12 is the same as that of the sub-straightening plate 1.
1 is so large that it closes up with the main rectifying hole 1o of the main rectifying plate 9 when it is moved to the maximum. In addition, the sub-straightening plate 11 is the main rectification plate 9.
It is possible to adjust the suction force more precisely by increasing the number as much as possible in a plane within the area of .

Effects of the Invention As is clear from the above embodiments, according to the present invention, a main current plate and a plurality of sub current plates are provided in a plane inside the printing bed,
The auxiliary rectifier plate is movable by sliding on the main rectifier plate, and the suction force can be adjusted by adjusting the degree of overlap between the main rectifier holes and the auxiliary rectifier holes, resulting in a highly reliable null.
It is possible to manufacture a multilayer substrate having holes.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the positional relationship between the main current plate and the sub current plate in a printing press according to an embodiment of the present invention, and FIG.
A plan view of a part of the figure enlarged, Fig. 2(b), (C
) is a sectional view showing the positional relationship between the main rectifying hole of the main rectifier plate and the sub-straightening hole of the sub-straightening plate, Figure 3 is a sectional view of the main part of the printing press of the same example, and Figures 4 and 5 are respectively A plan view of a rectifying plate in a conventional printing press, and FIG. 6 is a sectional view of a main part of the conventional printing press. 8...Printing stand, 9...Main rectifier plate, 10
・・・・・・Main rectifier hole, 11 ・・・・Sub-straight rectifier plate, 1
2... Sub-rectification hole. Name of agent: Patent attorney Shigetaka Awano et al.

Claims (1)

[Claims] A printing machine having a suction type printing table, wherein a main rectifying plate having a plurality of main rectifying holes and a plurality of sub-straightening plates having a plurality of sub-straightening holes in a plane are provided inside the printing table, and the A printing machine with a structure in which the suction force can be partially adjusted by making the sub-straightening plate slidable on the main straightening plate.