JPS6042034A - Method and device for dusting blank for laminating - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for removing dust in a workplace in which materials for lamination are stacked on top of each other and plates are placed on both sides of the stack before inserting the materials for lamination into a press machine in the process of manufacturing laminates, etc., and the method thereof. Regarding equipment.

In recent years, the circuits of copper-clad + laminated boards for printed circuit boards have become thinner and closer together, and as a result, preventing the adhesion of minute dust has become an important issue in this manufacturing process. It's coming.

Dust may be generated from peripheral machines, interior materials of partitions, insulation materials, worker's clothing, air for indoor temperature control, etc., or from the laminated material itself.

Dust caused by materials also includes the fibers that make up the base paper (cellulose, glass, etc.) and the resin that coats the fibers, resulting in minute protrusions that have fallen off.

In the manufacturing process of copper-clad laminates for printed circuit boards, if the resin component of the material falls off and remains attached to the copper foil on the surface and is laminated and molded in the pressing process, not only will unevenness appear on the surface layer of the copper foil. In electrical circuits created by printing circuits and etching unnecessary parts in processes after the pressing process, resin often covers the important parts, and in such cases, those parts cannot be etched. As a result, when the final printed circuit board is made, a short circuit occurs between the circuits, making it unusable.

Conventionally, the area where laminated materials are stacked and set on the backing plate is usually separated from other areas, and in order to keep it clean, a large amount of air is sucked in from various parts of the room and blown out again through an air filter etc. ing.

However, since the source of dust is also the material itself, the effectiveness of using a normal clean room or increasing the degree of cleanliness is only limited.

The present invention uses a simple method to prevent dust generated from the laminating materials themselves, which could not be prevented in conventional clean rooms, from adhering to materials including copper foil. Therefore, it is possible to remove the dust that is present in the molded laminate, and therefore, the number of defects in the formed laminate can be extremely reduced.

The present invention is a method for removing dust from laminating materials, which is characterized by blowing purified air from above onto the laminating materials when stacking the laminating materials. An air blowing plate approximately the same size as the above-mentioned material is provided above the workbench on which the sheets are superimposed, and has a large number of blowholes for blowing out purified air downward. This feature allows dust to be removed without leaving it on the overlapping surface of the moon.

The present invention will be specifically explained with reference to the drawings.

To overlap the pot materials, place the materials (2) on the workbench (1).
) are superimposed. Above it is an air blowing plate (3
) is installed. This air blowing plate has a large number of air blowing ports (4) and blows purified air downward. It is important that the air blown out from this outlet flows downward in parallel, and for this purpose the outlet plate should be a perforated plate with a diameter of about 5 to 20 holes, or a width of 5 to 10 m.
A plate having a slit of about m is preferable. The wind speed at the outlet varies depending on the distance between the outlet and the work surface, but it is 0.
．． Good results were obtained at a speed of about 5 to 30 m/sec. 0.
If it is smaller than 51 n/sec, it will not be sufficient to remove dust from the surface of the material, and if it is larger than 3.0 m/sec, there will be a dust removal effect but the material will become wavy. In addition, the air volume is 60 to 100 m'/min when the material area is 2-
Good results were obtained. On the other hand, an air suction port (5) is provided around the workbench (1). It is preferable that this suction port be provided at the same height as the work surface of the workbench or slightly below it, and virtually all around the workbench, but may be provided only partially around the workbench in view of work efficiency. By sucking air through this suction port, the air from the blow-off plate passes through the material surface and flows smoothly to the suction hole without stagnation, so that dust adhesion can be effectively prevented. The suction port and the outlet plate are connected by a duct (8) incorporating a circulation fan (6) and an air filter (7).

By adopting the dust removal method and device of the present invention, the defective rate of copper-clad laminates or printed circuit boards due to dust adhering to the surface of the laminated material can be reduced to less than in the case of conventional clean rooms. can be reduced.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a dust removal device of the present invention. (1) Workbench (3) Air blowing board (4) Air intake port

Claims (2)

[Claims] (1) A method for removing dust from laminated materials, which comprises blowing purified air onto the laminated materials when laminating the laminated materials in the manufacturing process of thermosetting resin laminates, etc. . (2) Above the workbench on which the materials for lamination are stacked, there is an air blowing plate approximately the same size as the materials, which has a large number of blowoff ports that blow out purified air downward, and around the workbench. is a dust removal device for laminated materials, characterized by having an air suction port.