JPH07215506A - Transferring method for metal-clad laminated plate member - Google Patents

Abstract

PURPOSE:To prevent the generation of cracks on a metal foil when a member laminated with a prepreg, the metal foil, and an end plate is hoisted with chucks, pressed with a presser rod, and transferred. CONSTITUTION:A member 2 laminated with a prepreg, a metal foil, and an end plate is hoisted with chucks 3, pressed with a presser rod 1, transferred, and released from the chucks 3 in this transferring method of the metal-clad laminated plate member. The presser rod l presses only the end sections of the end plate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of combining a prepreg and a metal foil in a manufacturing process of a metal-clad laminate and then transferring them to the next process.

[0002]

2. Description of the Related Art In the process of manufacturing a metal-clad laminate, there is a construction work in which a prepreg, a metal foil and an end plate are superposed. The stacked constituent materials 2 are lifted up by the chuck 3, transferred onto the configured constituent material mounting table, and stacked on the configured constituent material 4. At this time, the chuck 3 is pressed with the presser bar 1 so that the constituent materials are not displaced.
It is open from (see FIGS. 2 and 3).

The constituent materials 2 are stacked in a predetermined number and then transferred to a press, heated and pressed, and cut into a required size to obtain a product.

[0004]

SUMMARY OF THE INVENTION In such a method,
Stress is locally generated at the portion pressed by the presser bar 1.
If the prepreg has protrusions such as resin powder, particularly large stress is generated. Due to the influence of the stress generated at the position of the prepreg protrusion, a harmful crack is often generated in the metal foil sandwiched between the presser bar and the prepreg.

Recently, the density of printed wiring boards has been increasing, and along with this, metal-clad laminates used for printed wiring boards are increasingly using extremely thin metal foils. Since the extremely thin metal foil itself has a small strength, when it is pressed at the position of the prepreg protrusion, a crack is easily generated on the surface of the metal foil. When a printed wiring board is formed from a metal-clad laminate having a crack, the cracked portion is directly connected to a serious defect such as a circuit disconnection, which is a great obstacle to increasing the density of the printed wiring board. In recent years, the thickness of metal-clad laminates has been rapidly reduced, and recently, a metal foil having a thickness of 9 μm, which has never been used, has begun to be used. Since ultrathin metal foils such as 12 μm and 9 μm have extremely low strength due to their thinness, cracks that occur during the production of metal-clad laminates are likely to occur. It was an important issue of technology. In order to improve this, it is necessary to pressurize and heat the prepreg with a heat roll to smooth the prepreg protrusions and reduce cracks on the metal foil surface, which causes an increase in the number of processes. .

[0006]

The present invention provides a prepreg,
The constituent material 2 on which the metal foil and the end plate are stacked is lifted by the chuck 3 and transferred while being pressed by the presser bar 1,
In the method of transferring the metal-clad laminate-constituting material which is released from above, the holding rod 1 presses only the end portion of the end plate (see FIG. 1).
In order to manufacture a metal-clad laminate, this constituent material 2 is heated and pressed and cut into a required size. The pressing position of the constituent material 2 by the pressing rod 1, that is, the end of the end plate is outside the cutting position.

[0007]

Function: Metal-clad laminated plate Cracks on the surface of a metal foil mainly occur at the position of the presser bar 1 in the process of mechanically superposing the constituent materials and the end plate. Therefore, the contact portions of the presser bar 1 are limited to both ends. Even when the chuck 3 is released after being pressed by the presser bar 1, the pressing pressure is exerted on both ends of the constituent material and the end plate, so that they can be overlapped without causing a displacement. And since the pressing pressure does not work on the part that becomes the product after heating and pressing, even if there is a protrusion on the prepreg,
Does not crack metal foil.

[0008]

EXAMPLE A stainless steel end plate having a thickness of 1.8 mm and a length of 1,060 mm, a copper foil having a thickness of 1,080 mm and a thickness of 12 μm, and a glass cloth epoxy resin prepreg having a thickness of 1,080 mm and a thickness of 70 μm were superposed on each other. . The length of the presser bar 1 was 1,060 mm, and the size of the presser bar contact portion 5 (see FIG. 1) was 10 × 30 mm, which were provided at both ends of the presser bar 1.
In this state, 20 sets of 10 layers of constituent materials,
1,000 m by heating and pressing and cutting the periphery
200 m-square copper-clad laminates were obtained. At this time, the number of cracks found on the copper foil surface was three.

Comparative Example A presser bar contact portion was provided on the entire lower surface of the presser bar 1. The other conditions were exactly the same as in the example, and 200 sheets of 1,000 mm square metal-clad laminate were obtained. At this time, the number of cracks found on the copper foil surface was 32.

[0010]

EFFECTS OF THE INVENTION It is possible to greatly reduce the cracks on the surface of the copper foil of the metal-clad laminate which is directly connected to the fatal circuit failure of the printed wiring board. The method of the present invention can significantly reduce serious defects by making some modifications to a part of the equipment, and will make a great contribution to the future metal-clad laminate manufacturing technology.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of an apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of a main part of a conventional device.

FIG. 3 is a side view of a main part of a conventional device.

[Explanation of symbols]

 1 Presser bar 2 Constituent material 3 Chuck 4 Configured constituent material 5 Presser bar contact part

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B65H 3/54 310 B 8712-3F

Claims (1)

[Claims] 1. A method for transferring a metal-clad laminated plate constituent material, comprising: a constituent material having a prepreg, a metal foil and a mirror plate stacked on top of each other; A method for transferring a metal-clad laminate-constituting material, characterized in that only the end of the end plate is pressed.