JPH05162217A - Manufacture of laminated sheet - Google Patents

Abstract

PURPOSE:To provide a manufacturing method, with which the accuracy of electrical reliability test of laminated sheet, especially thin laminated sheet can be improved. CONSTITUTION:Laminated sheet, of which the accuracy of the electrical reliability test can be improved by laminatingly forming laminate produced by arranging metal foil on front face or rear face of release film having aperture, in which resin-impregnated base material can be housed, in a manner so as to surround the required number of sheets of the resin-impregnated base material under the condition being pinched between mirror plates, can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a laminated board used for an electrical reliability test.

[0002]

2. Description of the Related Art Recent printed wiring boards and multilayer printed wiring boards have been further miniaturized and miniaturized, and the electrical reliability of laminated boards used for them has been emphasized. However, in the laminated plate manufacturing process, there is a problem that the resin flowing out from the resin-impregnated base material at the time of laminating, so-called burr, contaminates the laminated plate end portion and reduces the accuracy of the electrical reliability test.

[0003]

As described in the prior art, the conventional laminated plate has a problem that the accuracy of the electrical reliability test is deteriorated. The present invention has been made in view of the above problems in the prior art, and an object of the present invention is to provide a method for manufacturing a laminated board that improves the accuracy of an electrical reliability test.

[0004]

According to the present invention, a metal foil is provided on the upper surface and / or the lower surface of a release film having an opening for accommodating the resin-impregnated base material, which is arranged around a required number of resin-impregnated base materials. The above-described object can be achieved because of the method for manufacturing a laminated plate, which is characterized in that the arranged laminated body is sandwiched between end plates and laminated, and the present invention will be described in detail below.

The resin of the resin-impregnated base material used in the present invention includes phenol resin, epoxy resin, unsaturated polyester resin, polyimide resin, polyamide resin, polyethylene terephthalate resin, polybutylene terephthalate resin,
Polyphenylene sulfide resin, polyphenylene oxide resin, fluorine resin, polybutadiene resin, etc. alone, modified resin, or mixture resin. If necessary, the resin may be inorganic powder filler such as talc, clay, silica, calcium carbonate, aluminum hydroxide, etc. It is also possible to add fibrous fillers such as glass fiber, asbestos fiber, pulp fiber, synthetic fiber and ceramic fiber. As the substrate, inorganic fibers such as glass, ceramics, asbestos, organic fibers such as vinyl alcohol, polyimide, polyethylene terephthalate, polybutylene terephthalate, polyamide, polyphenylene sulfide, polyphenylene oxide, fluororesin and cotton, etc. Woven fabrics, non-woven fabrics, papers, and the like made from natural fibers. As the release film, polyethylene terephthalate, polybutylene terephthalate, fluororesin, triacetate, metal foil or the like having general heat resistance and release property can be used. The opening of the release film should be 1
It is desirable that the opening has a gap of 10 mm, and the outer shape of the release film is 1 mm around the metal foil.
The thickness of the release film is preferably wider than 100 mm, and the thickness of the release film is preferably thinner than the thickness of the entire resin-impregnated base material. As the metal foil, copper, aluminum, brass, nickel, iron or the like alone, an alloy or a composite foil is used, and an adhesive layer can be provided on one side of the metal foil if necessary.
The end plate is not particularly limited, and a commonly used end plate can be used as it is. A press, a multi-roll, a double belt, a pressureless continuous method, or the like is used as the integration means, and the integration means is not particularly limited and is arbitrary.

The present invention will be described below based on examples.

[0007]

Example: A glass woven cloth having a thickness of 0.04 mm and an outer shape of 105 cm square was impregnated with a curing agent-containing epoxy resin so that the resin amount was 50% by weight (hereinafter simply referred to as%), and dried to obtain a resin impregnation. Two base materials, thickness 0.075 mm, outer shape 12
A release film having an opening of 0 cm square and 108 cm square in the center is housed in the opening, and then the upper and lower surfaces have a thickness of 0.0
18 mm, outer 110cm angle copper foil respectively disposed the laminate by the sandwiched thickness 2mm stainless steel was 90 minutes heat pressure molding at a molding pressure of 40Kg / cm ^2, 165 ℃ multistage press a thickness of 0. A 1 mm laminated plate was obtained.

[0008]

[Comparative Example] A laminated plate having a thickness of 0.1 mm was obtained by the same process as in Example except that the release film was not used.

Table 1 shows the results of a withstand voltage test conducted on 100 laminated plates of the examples and comparative examples at a DC voltage of 500V.

[0010]

[Table 1]

[0011]

The present invention is constructed as described above. It has been confirmed that the method of manufacturing a laminated plate having the structure described in the claims has a high accuracy in the electrical reliability test and is excellent in the present invention.

Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location B32B 15/08 105 7148-4F H05K 3/00 R 6921-4E // B29K 105: 06

Claims (1)

[Claims] 1. A laminate in which a required number of resin-impregnated base materials are surrounded by a release film having an opening for accommodating the resin-impregnated base materials, and a metal foil is disposed on the upper and / or lower surface of the release film.
A method of manufacturing a laminated plate, which comprises sandwiching the product between end plates and forming the laminate.