JPH03126544A - Manufacture of laminated board - Google Patents

Abstract

PURPOSE:To manufacture a polyimide-resin laminated board, in which there is no warpage, by a method wherein long-sized metallic foils are superposed on the top face and underside of a required number of long-sized triaryl isocyanurate modified polyimide resin-impregnated dried base materials, passed between laminating rolls, cured, cut in necessary size, heated at a thermal deformation temperature or higher and cooled at the thermal deformation temperature or lower. CONSTITUTION:A long-sized beltlike laminate 4 in which the adhesives of copper foils 2 with adhesives are opposed and superposed to long-sized resin-impregnated dried base materials 1 on the top face and underside of the four resin-impregnated base materials in which a triaryl isocyanurate modified polyimide resin composed of 100 pt. triaryl isocyanurate, 0.1 pt. 2-ethyl-4-methylimidazole, and 130 pt. dimethylformamide is dried to a 100 pt. polyimide resin long-sized glass cloth is impregnated with the polyimide resin so that the quantity of the resin is brought to 45% and the polyimide resin is dried, and the laminated long-sized glass cloth and resin-impregnated base materials are passed between vertically disposed laminating rolls 3 and laminated is forwarded to 1 curing oven 5, and heated and cured at contact pressure at 260 deg.C. Said cured material is cut by a cutter 6, heated at 250 deg.C by a heating oven 7, and quenched at 60 deg.C by a cooling oven 8, thus acquiring a laminate, in which warpage is hardly generated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a laminate used in electronic equipment, electrical equipment, computers, communication equipment, etc.

[Conventional technology]

Conventionally, laminates used for electrical equipment, etc. are made using a multi-stage press of laminated sheet metal made of resin-impregnated paper, resin-impregnated glass cloth, etc. and metal foil. L/% is heated and pressed for a long time of 1 to 2 hours. As a result, molding distortion remains in the laminate, causing warping due to the heat generated when processing the laminate into a printed wiring board or mounting electronic components on the printed wiring board, causing problems in automated processes. There was a drawback. This tendency was particularly strong in triallylisocyanurate-modified polyimide resin laminates to satisfy high frequency characteristics (8).

[Problem that the invention seeks to solve]

As described in the related art section, the laminate obtained by the multi-stage press method warps during the processing process.

The present invention has been made in view of the above-mentioned problems in the prior art, and its object is to provide a method for producing a triallylisocyanurate-modified polyimide resin laminate that does not cause warpage.

[Means for solving problems]

The present invention is a long strip-shaped laminate in which a required number of long gold foils are stacked on the upper and/or lower surfaces of a dried substrate impregnated with a triallyl isocyanurate-modified polyimide resin, and then passed between laminating rolls disposed above and below and laminated. The laminate manufacturing method is characterized by curing the material while continuously transferring it, cutting it to the required size, heating it above the heat distortion temperature, and then cooling it below the heat distortion temperature, which eliminates the need for pressurization. The present invention will be described below in detail.

Examples of the long triallyl isocyanurate-modified polyimide resin-impregnated dry substrate used in the present invention include inorganic fibers such as glass and asbestos, polyester, polyacrylic, polyvinyl alcohol, polyamide, polyimide, and polyphenylene sulfide.

Woven fabrics, non-woven fabrics, and matte fabrics made of organic synthetic fibers such as polyurethane or natural fibers such as cotton are paper or a combination of these materials and a polyimide resin of 100 parts by weight or less (simply written as parts).
10 to 200 parts of triallyl isocyanurate,
After drying a triallyliso V anulate-modified polyimide resin prepared by adding a catalyst such as imidazoles, organic peroxides, etc., and a solvent such as dimethylformamide, dioxane, dimethyl acetate, methyl ethyl keto ν, etc., the resin amount is 40 to 60.
It is impregnated to give a weight i% (hereinafter simply referred to as %), and it is preferable to perform the primary impregnation with a low-viscosity resin of the same type or a different type because more uniform impregnation can be achieved. be. The types and molecular weights of the polyimide resin and triallyl isocyanurate are not particularly limited. In addition, aluminum hydroxide is added to the resin as necessary.
It is also possible to add fillers such as talc, silica, and alumina. Furthermore, it is preferable to use the resin as it is, preferably after degassing it under reduced pressure, in order to suppress the generation of bubbles in the resin-impregnated cloth. Copper as metal foil,
Aluminum, iron, NiJKEL, zinc, etc. alone, alloys,
Gold foil is used, and if necessary, an adhesive layer can be provided on one side of the metal foil to further improve adhesiveness. The laminating roll may be made of metal, rubber, or synthetic resin, and may be one in which the surface of the metal roll is lined with rubber or synthetic resin. The curing temperature and curing time for curing the long strip-shaped laminate can be selected depending on the type of resin, but it is important that the curing is performed under no pressure or at 20 KQ/d. Heating and cooling after cutting are not particularly limited as long as they can be heated to temperatures above or below the heat deformation temperature of the resin used, but it is preferable that the heating and cooling can be rapidly cooled. Illustrated example of 5J! The explanation will be as follows based on an example.

Embodiment FIG. 1 shows part 1 of the method for manufacturing a laminate of the present invention! It is a simplified process diagram showing an example.

As shown in Figure 1, width 1050all, thickness 0.21n
A triallylisocyanurate-modified polyimide resin consisting of 100 parts of polyimide resin, 0.1 part of 2-ethyl-4-methylimidazole, and 130 parts of dimethylformamide was applied to a long glass cloth of 1O, and after drying, the amount of resin was A film with a thickness of 0.035 cm was applied to the top and bottom surfaces of four sheets of the long resin-impregnated dried base material 1, which was impregnated and dried to a thickness of 0.45 mm.
The adhesive of the adhesive-coated copper foil 2 of fl is stacked facing the resin-impregnated base material, and the laminated long strip-shaped laminate 4 is sent to the curing furnace 5 through laminating rolls 3 arranged above and below.
It was cured by heating at 0°C and contact pressure. The heat distortion temperature of this cured product was 240°C. Next, the cured product was heated at 1000
1100 (after cutting with carter 6 every 1, 2 in heating furnace 7
After heating to 50°C, it is rapidly cooled to 60°C in a cooling furnace 8 to a thickness of 0.
A double-sided copper-clad laminate 9 of 8 fl was obtained.

Comparative Example The same long triallylisocyanurate transparent polyimide resin-impregnated dry base material as in the example was cut into 1050 x 1050 square pieces and stacked, and the same steel foil as in the example and the same dimensions as above were placed on the top and bottom surfaces. Arrange the cut pieces at 260
℃, heat and pressurize for 120 minutes at 50KQ/d to obtain thickness Q,
A double-sided copper-clad FF laminate of g WM was obtained.

The performance of the laminates of Examples and Comparative Examples is shown in Table 1.

〔Effect of the invention〕

The present invention is constructed as described above. The method for manufacturing a laminate having the structure described in the claims has the effect of producing a laminate with less warpage.

[Brief explanation of the drawing]

FIG. 1 is a simplified process diagram showing an embodiment of the method for manufacturing a laminate according to the present invention. 1 is a long resin-impregnated dry base material, 2 is a copper foil, 3 is a laminating roll, 4 is a long strip-shaped laminate, 5 is a curing furnace, 6 is a cutter, 7 is a heating furnace, 8 is a cooling furnace, 9 is a laminate board It is.

Claims (1)

[Claims] (1) A long strip-shaped laminate made by stacking the required number of long metal foils on the upper and/or lower surfaces of a dried base material impregnated with a long triallyl isocyamelate-modified polyimide resin and laminating the sheets through laminating rolls arranged above and below. 1. A method for manufacturing a laminate, which comprises curing the laminate while continuously transferring the material, cutting into required dimensions, further heating above the heat distortion temperature, and cooling below the heat distortion temperature.