JPH03138142A - Preparation of metal-based laminated sheet - Google Patents

Abstract

PURPOSE:To improve the productivity by piling up laminates prepd. by placing a metal foil on a metal sheet through a resin layer, furthermore laminating a required number of laminates and laminating and molding them while they are inserted between mold plates. CONSTITUTION:Laminates 4 prepd. by placing a metal foil 3 on a metal sheet 1 through a resin layer 2 are piled up by bringing them into contact with each other and a required number of a pair of laminates 6 piled up like this is furthermore piled up by bringing the metal sheets 1 into contact with each other and they are inserted between mold plates 6 and laminated and molded. By performing like this, laminates 4 each consisting of the metal sheet 1, the resin layer 2 and the metal foil 3 are piled up and furthermore, a required number of piled laminates 5 is inserted between the mold plates. It is, thereby possible to reduce the number of the mold plates and to obtain excellent molding efficiently without spoiling the characteristics of the laminates 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method of manufacturing a metal-based laminate. More specifically, the present invention relates to a new manufacturing method capable of manufacturing metal-based laminates for printed wiring boards used in electrical/electronic equipment, computers, communication equipment, etc. with high productivity.

(Prior art) Printed wiring boards with various configurations have been used in electrical and electronic equipment, computers, communication equipment, etc., and as a type of printed wiring board, mechanical strength, heat resistance, Metal-based printed wiring boards with good properties such as physical properties and electrical properties are known.

These printed wiring boards are made of metals such as iron, aluminum, stainless steel, etc., as shown in Figure 2, for example.
A metal foil made of copper, aluminum, etc. is placed on a metal plate (a) made of an alloy such as silicon steel, or a composite material such as aluminum-coated copper, with a resin layer (b) made of a resin film, resin-impregnated base material, etc. It consists of (2) laminated and fixed together.

Furthermore, as shown in FIG. 2, such a metal base laminate is made by stacking each of the laminates (1) consisting of a metal plate (A), a resin layer (B), and a metal foil (X). It is also common to manufacture it by placing it between mold plates (e) and pressurizing and heating it to form an integral mold.

(Problem to be Solved by the Invention) However, in this conventional method for manufacturing metal-based laminates, since the daylight between the hot platens during pressure-heating laminate molding is constant, the laminate (1) Mold plate (
If the mold plates (e) and (e) are stacked alternately, the thickness of the mold plate (e) becomes extremely large, which has the disadvantage that it becomes impossible to mold a laminate (1) corresponding to this thickness. .

For this reason, it is necessary to reduce the number of mold plates used during lamination molding of metal-based laminates, and to increase the number of molded laminate products by the reduction. The reality is that no effective means have been found to solve these problems.

This invention was made in view of the above-mentioned circumstances, and aims to eliminate the drawbacks of the conventional laminate forming method and provide a new manufacturing method for metal-based laminates with excellent productivity. .

(Means for Solving the Problems) The present invention solves the above problems by laminating a laminate in which a metal foil is placed on a metal plate through a resin layer by abutting the metal plates against each other. To provide a method for producing a metal base laminate, which comprises further stacking a required number of the paired laminates by abutting metal foils against each other, and inserting the stacked laminates between mold plates to perform laminate molding. .

(Function) In the method of the present invention, a laminated plate consisting of a metal plate, a resin layer, and a metal foil is stacked with the metal plates facing each other and in contact with each other, and the outermost layer of metal foil is further brought into contact with each other to achieve the desired effect. Since a number of laminated plates are inserted between the mold plates, the number of mold plates can be greatly reduced compared to the conventional method.

Mold plates are used to suppress damage to the metal foil and deformation of the laminate during molding, and to improve thermal conductivity. Furthermore, by contacting and overlapping the metal foil surfaces, pressure and heat molding can be performed with excellent productivity without impairing the required properties.

Hereinafter, the manufacturing method of the present invention will be explained in more detail with reference to the attached drawings.

(Example) FIG. 1 shows an example of this invention.

As shown in this example, (a) First, it is made of metals such as iron, aluminum, and copper, or alloys such as stainless steel and silicon steel, or composite materials such as aluminum-coated copper, chrome plating, and zinc plating. , for example 0.5 to 2. OB metal plate (1
), a metal foil (3) is placed on top of the resin layer (2).

In this case, the resin layer (2) is a resin-impregnated base material made of glass, cloth, paper, etc., impregnated with resin such as phenol resin, unsaturated polyester resin, epoxy resin, polyimide resin, or fluororesin; Formed by coating, resin sheet, etc. alone, or a combination thereof. T! l fat layer (
In order to ensure the thickness of 2), it is preferable to use a resin-impregnated base material.

Regarding the metal foil, it is preferable to select it from the same material as the metal plate, and to have a thickness of 0.018 to 0.07m5+. If necessary, an adhesive layer may be added to the adhesive surface to the resin layer (2). Form it.

(b) Two of the thus obtained laminate plates (4) are overlapped by mutually abutting the metal plates (1). A pair of laminated plates (5) are formed.

The required number of stacked laminates (5), three in the example shown in Fig. 1, are stacked so that the outermost copper foils (3) are in contact with each other, and , inserted between mold plates (6) made of plates such as aluminum, stainless steel, copper, etc.

This mold plate (6) comes into contact with the outermost metal foil (3) of the laminate (4>).

In this state, pressure and heating lamination molding is performed using a hot platen press. For example, the molding pressure is 30 to 80 kg/cj,
The molding temperature can be 150 to (d) (c) 180° C., and the molding time can be about 40 to 120 minutes.

(e) After the lamination molding is completed, each layer is separated and peeled to obtain the desired metal base laminate.

The above manufacturing process will now be specifically described as an example of manufacturing a metal base laminate.

Manufacturing Example> A metal base laminate was manufactured according to the method shown in FIG.

First, on an aluminum plate with a thickness of 1.0 city, a thickness of 0.1
City epoxy resin impregnated glass cloth, and thickness 0.0
A 35 mm copper foil was placed to form a laminate (4).

The aluminum plates of this laminate (4) are brought into contact with each other,
Two laminates (4) were stacked on top of each other. Three of the obtained laminated laminates (5) were stacked with their copper foil surfaces in contact with each other, and this was inserted between two stainless steel plates with a thickness of 2 mm. In this state, the molding pressure was 40 kHz/ai and the temperature was 1.
Pressure and heat lamination molding was performed at 65°C for 90 minutes.

Next, each laminate (4) was divided to obtain the desired metal base laminate.

No damage to the copper foil or deterioration of properties during molding was observed.

In this way, it is possible to produce a large number of metal-based laminates with higher efficiency than with conventional methods. Of course, the present invention is not limited to the above examples, and it goes without saying that the 4111 part can be modified in various ways.

(Effects of the Invention) As explained in detail above, the present invention enables production with much higher efficiency than the conventional method in which metal base laminates are alternately stacked and molded with mold plates. The number of mold plates used can be reduced, and laminates can be formed with the same thickness.

The productivity of metal-based laminates is greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a laminated plate and a metal plate stacked together, showing one embodiment of the present invention. FIG. 2 is a sectional view showing this overlapping state in the conventional method. 1... Metal plate 2... Resin layer 3... Metal foil 4... Laminated plate 5... Laminated laminate plate 6... Mold plate Fig. 1

Claims (1)

[Claims] (1) Laminated plates in which metal foil is placed on metal plates via a resin layer are overlapped by mutual contact of the metal plates, and the required number of laminated plates are further stacked by mutual contact of the metal foils. A method for manufacturing a metal base laminate, which comprises stacking the sheets and inserting them between mold plates for laminated molding.