JPS62284734A - Manufacture of metal foil-clad laminated sheet - Google Patents

Abstract

PURPOSE:To manufacture a cut-to-specified-length laminate for electrical use by employing metal foils with external dimensions smaller than the specified lengths by a method wherein, the metal foils, the area of each of which is smaller than the area of a prepreg, are used under the state that the amount of lap between the metal foils is set to the specified dimension or less. CONSTITUTION:In the manufacture of a metal foil-clad laminated sheet produced by laminate-molding a laminate, in which metal foils are arranged onto the top surface and/or undersurface of the required number of prepreg, the metal foils, the area of each of which is smaller than the area of the prepreg, are used under the state that the amount of lap between the metal foils is set to 3mm or less. In case of the amount of lap exceeding 3mm, the pressure at high pressure multi-stage pressing can not be made uniform, resulting in developing defective laminate molding. On the contrary, in case that the metal foils do not be lapped over each other, the resin oozing out of prepreg during laminate molding stains the surface of the metal foil and molding plates. Consequently, the lapping space between the metal foils is necessary.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Technical Field] The present invention relates to a method for manufacturing metal foil-clad laminates used in electrical equipment, electronic equipment, electronic meters, communication equipment, etc. .

[Background technology]

A large number of performances are required of recent electronic devices, electronic FL devices, electronic computing devices, communication devices, and the like. For example, in the past, most requests for circuits could be met with circuits made of copper foil, but recently there have been increasing requests for circuits made of gold, silver, platinum, etc. However, the manufacturing dimensions of electrical laminates are approximately 1
It is difficult to obtain expensive metal foil such as gold, silver, platinum, etc. with a thickness of 18 to 70 microns and a size of 1 m x 1 m, which has relatively large dimensions of 1 m x 1 m or about 1 m x 2 m, due to delivery times, loft size, etc. Ta.

[Purpose of the invention]

The object of the present invention is to produce a standard size metal foil with small external dimensions! ! l: An object of the present invention is to provide a method for manufacturing a metal foil-clad laminate that can produce a bond laminate.

[Disclosure of the invention]

The present invention relates to a method for manufacturing a metal foil-clad Y1-layer plate in which a laminate having a required number of prepregs with metal foil arranged on the upper and/or lower surfaces is formed into 8 m layers, in which a metal foil having an area smaller than the area of the prepreg is used. Since the method for producing a metal foil-clad laminate is characterized in that the distance between the laps and the metal foil is set to 3a or less, it is possible to obtain a standard-size electrical laminate even when the metal foil has a small external dimension. The present invention will now be described in detail.

The prepreg used in the present invention includes resins such as pheno-μ resin, creso/%/resin, ebony V resin, unsaturated polyester/L/#Ijt resin, melamine resin, polyimide resin, polyamideimide resin, and diallyl phthalate. Thermosetting resins in general, including resins alone, mixtures, and modified products, can be used without any particular limitation.

Base materials include glass, inorganic fibers such as asbestos, Holieste TV resin, polyamide resin, polyvinyl alcohol-I
v. Woven fabrics, non-woven fabrics, cheesecloth, mats, paper, or combinations of these materials made of organic synthetic fibers such as resins, polyacrylic/I/resins, and polyurethane resins, and natural fibers such as cotton, which are particularly limited. isn't it. Copper as metal foil,
All metal foils such as aluminum, brass, nickel μ, platinum, gold, and silver can be used, and if necessary, an adhesive layer can be provided on one side of the metal foil to further improve the adhesiveness with the prepreg. It is also possible. It is necessary that the distance between the laps between the metal foils is 3W or less. That is, if the number exceeds 3, the pressure during high-pressure multi-stage press molding cannot be made uniform and lamination molding defects will occur. Furthermore, if there is no wrap between the metal foils, the resin exuding from the prepreg during lamination molding will contaminate the metal foil surface and the molding plate, so it is necessary to provide a distance between the wraps.

The present invention will be explained below based on examples.

Example: On the upper surface of 8 sheets of 1050 gun x 1050 wx epoxy impregnated glass cloth prepreg with a thickness of 02M, two sheets of gold foil with a thickness of 1050 x 526 layers were wrapped between the ends of the 1050 pieces. After overlapping at a distance of 21 m, molding pressure was opened and molded at 170″C for 90 minutes.
A gold-plated laminate of S Ml was obtained by molding a 1lI layer and increasing the thickness.

Comparative Example 1 Two sheets of gold foil of 1050 m x 525N were placed on the upper surface of 8 sheets of the same prepreg as in the example stacked together for 10 minutes.
After the ends of 50 m were brought into a butt state, they were treated in the same manner as in Example to obtain a gold-plated bond laminate having a thickness of 1.61 El.

Comparative Example 2 Two sheets of gold foil with a thickness of 1050 # x 527 microns were placed on the top surface of a stack of 8 sheets of the same prepreg as in the example.
After overlapping the 50 layers with a distance between laps of 4M at the end, the layers were treated in the same manner as in the example to form a gold-plated bond layer plate with a thickness of 1.6 mm.
- Lagoon.

〔Effect of the invention〕

With the metal foil-clad laminate of the present invention, it is possible to efficiently produce a fixed-size electrical laminate using metal foil with a small external dimension, and it is possible to efficiently manufacture a regular-sized electrical laminate using metal foil with a small external dimension. It was confirmed that the present invention is superior because a metal foil-clad laminate can be made even if it is not a metal foil.

Claims (1)

[Claims] (1) In a method for manufacturing a metal foil-clad laminate in which a laminate is formed by laminating a required number of prepregs with metal foil arranged on the upper and/or lower surfaces, the metal foil and metal A method for producing a metal foil-clad laminate, characterized in that the distance between the wraps and the foil is 3 mm or less.