JPS6146090A - Metal base metal-lined board - 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 [Technical Field] The present invention relates to a metal-based metal-clad laminate having excellent heat resistance and moisture resistance.

[Background technology 1 Conventionally, metal-based metal-clad MLJf using a metal plate as a base
When manufacturing the fl board, the insulation/l! As 3, a prepreg 5 in which a glass wire cloth is impregnated with aI fat is used, and after stacking a plurality of prepregs 5 on the surface of the metal plate 2, a metal Tti 4 is overlapped on the surface and heated and press-formed to form a metal. The company was manufacturing base metal-clad laminates. However, this manufacturing method has the disadvantage that when the prepreg has a low ul fat content, it comes into contact with the metal plate (due to the small amount of fat, the adhesion is low, and the moisture resistance, heat resistance, etc. are poor). On the other hand, when the resin content in the prepreg is high, the !1 fat seeps out onto the surface and slips during molding, making it difficult to mold. As a manufacturing method, the third
As shown in the figure, there is a method of forming the insulating layer 3 with resin/156, but this method does not have sufficient strength, so soldering with a soldering iron etc. may sometimes destroy the insulating layer 3. There was a drawback.

[Object of the Invention] The present invention has been made in view of the above points, and an object of the present invention is to provide a metal-based metal-clad laminate having excellent heat resistance and moisture resistance.

[Disclosure of the Invention] That is, the metal-base metal-clad laminate of the present invention is characterized in that a metal W4 is laminated on the surface of a metal plate 2 via an insulating layer 3 made of glass nonwoven fabric impregnated with resin. This achievement was achieved by using a glass nonwoven fabric as the convex material of the insulating layer 3.

The present invention will be explained in detail below. Insulation f used in the present invention
r! For i3, glass nonwoven fabric is impregnated with resin (
It uses oil-impregnated lath nonwoven fabric.

Although the resin is not limited, for example, epoxy resin, polyimide resin, etc. can be used, and the weight ratio of the solid content of the impregnated resin to the glass nonwoven fabric is 0.7:1.
It is preferable to set the solid content in the range of ~30:1, and if the solid content of the resin is less than 0.7 to 1 part of the glass nonwoven fabric, a
It is difficult to impregnate with T fat and the properties are not obtained. Also, if the solid content of the resin exceeds 30% of the glass nonwoven fabric, the amount of resin flowing out during molding increases, making molding difficult.

Further, it is preferable to blend inorganic light Aft'M and a coupling agent into the resin. As the Mugo filler, aluminum hydroxide, calcium carbonate, alumina, silicon nitride, boron nitride, quartz, etc. can be used. Te0.2~9
If the amount of the inorganic filler is less than 0.2, the drill workability is poor, and if the amount of the inorganic filler is more than 9, it is difficult for the resin to impregnate the base material. It is what it is.

As the coupling agent, a silane-based camping agent, a titanate-based coupling agent, etc. can be used, and it is preferable to mix it in an amount of about 0.01 to 2.0% by weight based on the solid content of the resin. The insulating layer 3 of the resin-impregnated glass nonwoven fabric prepared by the above method is placed on the surface of the metal plate 2 as shown in FIG. This results in a stretched laminate.

Therefore, by using a glass nonwoven fabric as the base material of the insulating layer 3, even if the resin content in the absolute M/I 3 is small, the molten resin during molding will come into contact with the surface of the metal plate 2, resulting in good adhesion. This is something that can be improved. Also,
If the content of glue in the insulating layer 3 is high, the glass nonwoven fabric will contain υ fat, resulting in poor insulation/! The resin hardly oozes out onto the surface of the mold 13, so there is no possibility of slipping during molding. In addition, since glass non-woven fabric is used as the base material, drill workability is superior to that when conventional glass fiber fabric is used as the base material.
Moreover, it has excellent heat resistance, moisture resistance, and heat shock resistance of the through-hole portion. In the above embodiment, insulation/i53 and metal i4 are laminated on one side of the metal plate 2, but it goes without saying that they may be laminated on both sides of the laminated plate 2. The invention will be specifically explained based on embodiments and conventional examples.

1. A resin-impregnated glass non-woven fabric made of Takumi Plus non-woven fabric impregnated with epoxy resin is laminated on the surface of a metal plate as an insulating layer, and then copper foil is layered on the surface and heated and press-formed to form a metal-based steel-clad laminate. Obtained.

E1Ran L〃A prepreg made of lath woven cloth impregnated with epoxy resin is laminated on the surface of a metal plate as an insulating layer, and then copper foil is layered on the surface and heated and pressure molded to form 4. Got the board.

``Akumei'' [ζ Epoxy resin is applied as an insulating layer to the front and back surfaces of the metal plate,
Next, metal cladding was layered on the surface and molded under heat and pressure to obtain a metal-based copper clad laminate.

Next, the heat resistance of the metal Mies copper clad laminate obtained above,
Moisture resistance and heat shock resistance were tested.

The heat resistance test was conducted at 260℃ by visually observing abnormalities such as peeling of the solder @ foil at 260℃, and the moisture resistance test was conducted at 60℃.
・This test was performed by leaving the sample in a 90% atmosphere for 1000 hours and visually checking for abnormalities. In the heat shock resistance test of the through-hole part, one cycle consists of immersing it in oil at 260°C for 10 seconds, immediately immersing it in water at room temperature for 10 seconds, and then immersing it in Trichlorine at room temperature for 10 seconds. It is expressed as the number of cycles in which the abnormality occurs. Table 1 shows the results.
From the results shown in Table 1, it was confirmed that the laminates of Examples had improved heat resistance, moisture resistance, and heat shock resistance.

Table 1 [Effects of the Invention] As described above, in the present invention, a metal foil is laminated on the surface of a metal plate via an insulating layer in which a glass nonwoven fabric contains resin, so that the resin content in the insulating layer is Even when the amount of resin is small, the resin can be brought into sufficient contact with the surface of the metal plate to increase adhesion, and the heat resistance, temperature resistance, and heat shock resistance can be improved. Furthermore, even when the resin content is high, slippage during molding can be eliminated and molding can be facilitated.

[Brief explanation of drawings]

11 is a schematic sectional view of one embodiment of the present invention, FIG. 2 is a schematic sectional view of a conventional example, and FIG. 3 is a schematic sectional view of another conventional example. 2 is a metal plate, 3 is an insulating layer, and 4 is a metal foil.

Claims (1)

[Claims] (1) A metal-based metal-clad laminate comprising a metal foil laminated on the surface of a metal plate through an insulating layer of glass nonwoven fabric impregnated with resin.