JPH05479A - Laminated sheet and manufacture of laminated sheet - Google Patents

Abstract

PURPOSE:To provide a laminated sheet having no warpage and twist and a process of producing the same in order to eliminate warpage and twist which can not be eliminated in conventional laminated sheets. CONSTITUTION:The title laminated sheet is produced by a method wherein a metallic foil is disposed on and formed unitarily with the upper face and/or the lower face of a laminate composed of the required number of sheets of a resin-impregnated base material made of a woven cloth whose warps and/or wefts comprise yarn twisted 0 to 0.7 time/inch, and also by a method wherein the required number of sheets of a resin-impregnated elongated base material made of an elongated woven cloth whose warps and/or wefts comprise yarn twisted 0 to 0.7 time/inch is superposed on one another to form an elongated laminate, and the resultant elongated laminate further provided with an elongated metallic foil on the upper face and/or the lower face thereof is, after continuous laminate molding, cut into a required size.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electronic equipment, electric equipment,
The present invention relates to a laminated board used for a computer, a communication device, etc., and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, since a laminated plate is made of a woven fabric using warped yarns and weft yarns with twisted yarn of about 1 time / inch, internal strain caused when the yarn is twisted is caused by heat and tensile force. When an external force such as the above is applied, the twist of the yarn causes a warp and twist in the same direction as the untwisting direction, so that it is inevitable that the laminate has some warp and twist. However, when the laminated board is processed into a printed wiring board or when an electric component or the like is mounted on the printed wiring board, warpage or twisting makes it difficult to perform processing, which is a major cause of reduction in productivity.

[0003]

As described in the prior art, it has been unavoidable that the conventional laminated plate is warped or twisted. 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 laminated plate having no warp or twist and a manufacturing method thereof.

[0004]

SUMMARY OF THE INVENTION The present invention provides a metal-impregnated upper surface and / or lower surface of a required number of resin-impregnated substrates using a woven fabric in which warp yarns and / or weft yarns are twisted yarns of 0 to 0.7 times / inch. A laminated board, characterized in that the foil is arranged and integrated.
And a required number of long resin-impregnated base materials using a long woven fabric composed of warp and / or weft of twisted yarn of 0 to 0.7 times / inch, and further provided with a long metal foil on the upper surface and / or the lower surface thereof. The long laminate was continuously laminated and formed, and then, because of the method for producing a laminated plate, which is characterized in that it was cut to a required dimension, the above object could be achieved, and the present invention will be described in detail below. explain.

The resin-impregnated base material used in the present invention is made of glass, asbestos or other inorganic fibers made of twisted yarn having warp and / or weft of 0 to 0.7 times / inch as a base material, vinyl alcohol, polyimide and polyphenylene. Rensulf Eyed,
It is a woven fabric made of organic fibers such as polyphenylene oxide and fluororesin, and natural fibers such as cotton. As the resin to be impregnated into the substrate, phenol, epoxy, unsaturated polyester, polyimide, polyamide, polyphenylene oxide, polyphenylene sulfide, fluororesin, etc. alone, modified products, mixtures are used, if necessary. Depending on talc, clay, calcium carbonate, aluminum hydroxide
Inorganic powder fillers such as silica and silica, and fibrous fillers such as glass fibers, asbestos fibers, pulp fibers, synthetic fibers and ceramic fibers can be added. Further, the resin may be impregnated only with the same resin, but a plurality of impregnations such as primary impregnation and secondary impregnation with the same type resin or different type resin may be performed to make the impregnation more uniform. Thus, after impregnating the base material with the resin, it is dried by heating or the like, if necessary, to obtain a 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 conditions of integration are resin, base material, thickness, etc., and the curing time, curing temperature, and molding pressure can be selected, but continuous methods such as pressureless continuous method, double belt molding method, and multi-roll method are available. It is necessary. . After the laminated molding, the laminated plate is obtained by cutting it to a required size with a cutter or the like.

The present invention will be described below based on examples.

[0007]

Example 1 A long glass woven cloth having a yarn density of 44 warps / inch and weft threads of 32 / inch, a warp and weft twist count of 0.3 / inch, a thickness of 0.15 mm and a width of 105 cm. 4 pieces of long epoxy resin-impregnated glass woven cloth prepreg impregnated with epoxy resin so that the resin amount becomes 45% by weight, and further, a long copper having a width of 105 cm and a thickness of 0.018 mm on the upper and lower surfaces thereof. The long laminate provided with the foil is sent to a double belt molding machine, and the molding pressure is 10 kg / cm ² , 1
After continuously heat-pressing and molding at 65 ° C. for 10 minutes, a cutter was cut into 100 cm square pieces to continuously produce a laminated plate having a thickness of 0.8 mm.

[0008]

Example 2 A long glass woven fabric having a yarn density of 44 warps / inch and weft threads of 32 / inch, a warp and weft twist count of 0.7 / inch, a thickness of 0.15 mm and a width of 105 cm. , Using an unsaturated polyester resin as the impregnating resin,
After the impregnation, it was not dried and was processed in the same manner as in Example 1 except that it was laminated without pressure at 165 ° C. for 20 minutes without any pressure.
8 mm laminates were manufactured continuously.

[0009]

Comparative Example 1 Long glass woven cloth having a yarn density of 44 warps / inch and weft threads of 32 / inch, a warp and weft twist count of 1.0 / inch, a thickness of 0.15 mm and a width of 105 cm. Except that the same process as in Example 1 was performed to obtain a thickness of 0.
8 mm laminates were manufactured continuously.

[0010]

[Comparative Example 2] Long glass woven fabric having a yarn density of 44 warps / inch and weft threads of 32 / inch, a warp and weft twist count of 1.0 / inch, a thickness of 0.15 mm and a width of 105 cm. Except that the same procedure as in Example 2 was performed to obtain a thickness of 0.
8 mm laminates were manufactured continuously.

The performance of the laminates of Examples 1 and 2 and Comparative Examples 1 and 2 are shown in Table 1. The test piece size of the warp amount is 400 × 250 mm, and after forming the copper foil circuit with the front and back copper foil residual ratio of 65% -25%,
The maximum lifting amount was measured with 12 samples on the surface plate.

[0012]

The present invention is constructed as described above. In the laminated plate and the method for manufacturing the laminated plate having the configurations described in the claims, it was confirmed that the amount of warpage of the obtained laminated plate can be significantly reduced, and the present invention is excellent.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hideshi Makino             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company

Claims (2)

[Claims] 1. A metal foil is provided on the upper surface and / or the lower surface of a resin-impregnated base material of a required number using a woven fabric composed of warp and / or weft composed of twisted yarns of 0 to 0.7 times / inch. A laminated board characterized by being formed. 2. A required number of long resin-impregnated base materials using a long woven fabric in which warp yarns and / or weft yarns are twisted yarns of 0 to 0.7 times / inch, and a long metal is provided on the upper surface and / or the lower surface thereof. A method for producing a laminated plate, which comprises continuously laminating and molding a long laminated body provided with a foil, and then cutting the laminated body to a required size.