JPH03128237A - Manufacture of matal-foiled laminate - Google Patents

Abstract

PURPOSE:To prevent resin burr from reaching a metallic plate in heating and pressurizing by a method in which the surface area of the metallic foil brought in surface contact with the metallic plate is enlarged more than that of a prepreg, and the periphery of said metallic foil is projected more than the periphery of the prepreg. CONSTITUTION:A plurality of uncured prepregs 3 are laminated on a base, and the metallic foils 2 such as copper foils are arranged on the upper and lower surface of the prepregs, and then the laminate 5 thus obtained are nipped between the metallic plates 1, 1 such as end plates are laminated in multiple steps up and down. The laminate is heated and pressurized by approaching heating templates 4, 4 thereto, whereby the metallic plates 1, 1 arranged on both surfaces of the prepregs 3 are make integral and a metal-foiled laminate A is obtained. In said case, the surface area of the metallic foil 2 brought in surface contact with the metallic plate 1, 1 is enlarged than that of the prepreg 3, and also enlarged than that of the metallic plates 1. While the periphery of the metallic foil 2 is projected more than the periphery of the prepreg 3, it is also projected more than the periphery of the metallic plate 1.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a metal foil-clad laminate, and more specifically to a technique for solving various problems caused by resin flowing out from a prepreg during heating and pressing. This is related.

[Prior Art] Conventionally, as shown in FIG.
Layer and interpose metal R62 and prepreg 3 in the dark,
In manufacturing the metal foil-clad laminate A by heating and pressurizing the metal plates 1 and 1 in close proximity, the surface area of the metal Wj2 was made approximately equal to the area of the prepreg 3.

[Problem to be Solved by the Invention 1] By the way, in the conventional manufacturing method, the surface area of the metal foil 2 is made approximately equal to the area of the prepreg 3, and the heating template 4, When heating and pressurizing the prepregs 4 in close proximity to each other, the resin flowing out from the prepreg 3 adheres to the metal plate 1.1, and also penetrates into the metal plate 1. It becomes difficult to separate 1.1 from the product, defective products occur due to such resin particles, and the work of removing the resin particles from the metal plate 1.1 becomes troublesome.
If the metal plates 1, 1 are not sufficiently removed, various problems may occur, such as the product being dented during subsequent heating and pressurization.

The present invention was made in view of such problems,
The objective is to prevent resin particles from reaching the metal plate during heating and pressurization through simple improvements, and to eliminate the problems associated with resin particles. An object of the present invention is to provide a method for manufacturing an i-clad horizontal laminate.

[Means for Solving the Problems] The metal foil-clad laminate of the present invention is manufactured by laminating and interposing gold R foil 2 and prepreg 3 between the flat metal plates 1 and 1. A manufacturing method for manufacturing a metal foil clad laminate by heating and pressing plates 1.1 in close proximity to each other, the surface area of the metal foil 2 facing the metal plate 1.1 being at least larger than that of the prepreg 3. , is characterized in that the peripheral part of the metal M2 is made to protrude beyond the peripheral part of the prepreg 3.

[Function] In this way, the metal that is interviewed by the metal plates 1 and 1? i
The surface area of 2 is at least 6 larger than that of prepreg 3,
That metal? ! By making the peripheral part of f2 protrude beyond the 1151 part of the prepreg 3, the metal plates 1, 1
When heating and pressurizing the prepregs 3 in close proximity, the resin particles flowing out from the prepreg 3 are prevented from reaching the metal plates 1, 1 by increasing the area and protruding from the periphery of the prepreg 3. However, the resin particles may adhere to the metal plate 1, or enter between the metal plates 1, 1 and the metal foil 2, making it difficult to separate the metal plate 1.1 from the product. Defective products may be produced due to the resin spacing, and it is necessary to remove the resin flakes from the metal plates 1, 1, which is troublesome, and if the metal plates 1, 1 are not removed sufficiently, the subsequent heating may be difficult. This is to avoid the problem caused by the resin particles reaching the metal plate 1.1, which causes dents in the product when pressurized. The details will be explained based on the following.

Metal foil-clad laminate A is made by laminating a plurality of uncured prepregs 3 whose base material is impregnated with 7-el resin, and coats the upper and lower surfaces of these prepregs 3 with metal such as W4 foil. ! 2, such a laminate 5 is sandwiched between mirror-finished mirror-like metal plates 1, 1, and such HI1 is stacked vertically in multiple stages as shown in FIG. Then, the prepreg 3 between the metal plates 1, 1 is passed through the heating mold plates 4, 4 on the upper and lower surfaces to raise the temperature to an appropriate temperature, and heated and pressurized by bringing the heating mold plates 4, 4 close together. Heat and harden the
Metal plate 1 arranged on both sides of prepreg 3...
, 1 are integrated to obtain metal foil-clad laminate A.

In such a case, the metal foil 2 facing the metal plates 1, 1
has a larger surface area than the prepreg 3 and is thicker than the metal plate 1 (so that the peripheral part of the metal @2 protrudes from the peripheral part of the prepreg 3 and the peripheral part of the metal plate 1). Therefore, metal plate 1
, 1 are heated and pressurized in close proximity to each other, the resin particles flowing out from the prepreg 3 are prevented from reaching the metal plates 1 and 1 by increasing the area and protruding from the periphery of the prepreg 3. It is. In this way, the resin particles are prevented from adhering to the metal plate 1 or from entering between the metal plate 1 and the metal M2. This prevents the production of defective products. Also, there is no need to remove the resin particles one by one from the metal plate.
This prevents the product from being dented during subsequent heating and pressing when the metal plates 1, 1 are not sufficiently removed.

The disassembly time for the metal plates 1 and 1 and the metal foil clad laminate @A was 60 to 90 seconds/sheet in the past, but now
With the method of the present invention, the time is about 30 seconds/sheet, and the number of poor impressions has decreased from 1.8% in the conventional method to about 0.64%.

The metal foil-clad laminate A obtained by heating and pressing in this manner is cut along the cut line 1 shown in FIG. 2, and the metal M2 protruding from the circumference of the prepreg 3 is also cut.

[Effect of the invention 1] In short, the present invention makes the surface area of the metal foil that faces the metal plate larger than at least the prepreg, and makes the peripheral part of the metal foil protrude more than the peripheral part of the prepreg. When heating and pressurizing is performed by keeping the prepreg close to each other, the resin particles flowing out from the prepreg are prevented from reaching the metal plate by increasing the area and protruding from the circumference of the prepreg, and the resin particles are prevented from reaching the metal plate. It may adhere to the plate or penetrate between the metal plate and the metal foil, making it difficult to separate the metal plate from the product, or producing defective products with such resin foil. It is necessary to remove the resin from the metal plate, which is troublesome, and if it is not removed sufficiently from the metal plate, the resin particles will end up on the metal plate, causing dents in the product during subsequent heating and pressurization. The advantage is that problems caused by this can be avoided.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the V-process of a metal foil-clad laminate according to an embodiment of the present invention, Fig. 2 is a plan view showing the cutting line for obtaining the same metal foil-clad laminate, and Fig. 3 1 is a cross-sectional view of a conventional KL manufacturing process, in which 1 is a metal plate, 2 is a metal foil, and 3 is a prepreg.

Claims (1)

[Claims] (1) A manufacturing method in which a metal foil and prepreg are laminated and interposed between flat metal plates, and the metal plates are brought close to each other and heated and pressurized to manufacture a metal foil-clad laminate,
A method for manufacturing a metal foil-clad laminate, characterized in that the surface area of the metal foil that faces the metal plate is at least larger than that of the prepreg, and the peripheral part of the metal foil is made to protrude beyond the peripheral part of the prepreg.