JPH08174760A - Composite laminate - Google Patents

Abstract

PURPOSE: To improve the punching processability of a composite laminate while containing a large amount of inorganic fillers in a resin of a core layer. CONSTITUTION: A thermosetting resin-impregnated glass unwoven fabric is used as a core layer, and a thermosetting resin-impregnated glass woven fabric is used as a surface layer. These layers are made in one piece to form a composite laminate. In the core layer of this composite laminate, 70-160 pts.wt. of inorganic fillers are contained in the thermosetting resin with respect to 100 pts.wt. of resin. Further, a glass transition point as the laminate is made equal to or below 145 deg.C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite laminate having good punching workability.

[0002]

2. Description of the Related Art In recent years, the development of electronic equipment using integrated circuits such as ICs and LSIs has been remarkable. As a printed wiring board for mounting these integrated circuits, a processed copper-clad laminate is used, but with the above development, a copper-clad laminate is also required to have excellent characteristics. It was A composite laminated board in which a glass nonwoven fabric impregnated with a thermosetting resin is used as a core material layer and a glass woven fabric impregnated with a thermosetting resin is used as a surface layer, and these are integrated,
Compared with a laminated board composed only of glass woven cloth impregnated with thermosetting resin, it has excellent through-hole reliability and punching workability while maintaining the same electrical characteristics, and it is also inexpensive. Widely used. In the core layer of the composite laminate, an inorganic filler is mixed in the resin for the purpose of through hole reliability and dimensional stability. The compounding amount was generally 10 to 60 parts by weight with respect to 100 parts by weight of the resin. In some cases, the compounding amount of the inorganic filler exceeds 60 parts by weight, but in that case, the glass transition temperature of the laminated plate is higher than 145 ° C., and the punching workability is poor.

[0003]

The problem to be solved by the present invention is to improve the punching workability of a composite laminate while adding a large amount of an inorganic filler to the resin of the core layer. is there.

[0004]

In order to solve the above-mentioned problems, the composite laminated board according to the present invention is such that the thermosetting resin of the core layer contains the inorganic filler in an amount of 70 to 160 per 100 parts by weight of the resin. It is blended in parts by weight, and the glass transition temperature of the laminate is 145 ° C. or lower.

[0005]

When the content of the inorganic filler in the core material layer is 70 parts by weight or more based on 100 parts by weight of the resin, the impact during punching is properly dispersed, so that cracks and whitening do not occur. However, if the compounding amount of the inorganic filler is less than 70 parts by weight with respect to 100 parts by weight of the resin, the impact during punching cannot be dispersed and cracks will occur. If the blending amount of the inorganic filler is more than 160 parts by weight with respect to 100 parts by weight of the resin, the resin becomes too brittle, resulting in whitening during punching. Moreover, the compounding amount of the inorganic filler is 70 to 1 relative to 100 parts by weight of the resin.
Even in the range of 60 parts by weight, when the glass transition temperature of the laminated plate itself is 145 ° C. or higher, the resin becomes brittle, so that whitening occurs.

[0006]

Examples The thermosetting resin used in the present invention is a commonly used resin such as polybutadiene resin, epoxy resin, phenol resin, melamine resin, diallyl phthalate resin, silicon resin and the like, but is not particularly limited. When the temperature is 145 ° C. or lower, the glass transition temperature of the laminated plate is likely to be 145 ° C. or lower. Therefore, a glass transition temperature of 145 ° C. or lower is preferably used. In addition, bromine compounds and antimony trioxide to make the laminate flame-retardant,
A flame retardant such as antimony pentoxide or a phosphorus compound may be used. The inorganic filler used in the present invention may be any one having a large electric insulation property, and talc, aluminum hydroxide, glass powder and the like can be used alone or in combination of several kinds. The glass woven fabric and glass non-woven fabric substrate used in the present invention may be any of those commonly used for electrical insulation, such as SiO ₂ and A such as T glass.
A material containing a large amount of l ₂ O ₃ has a large hardness, and therefore has a large resistance during punching. Ca, preferably E-glass
The one containing O or the like having a lower hardness has better punching workability. The composite laminated plate according to the present invention also includes one in which a metal foil is integrated on the surface. The metal foil used is a copper foil, a nickel foil, an aluminum foil or the like, but is not particularly limited.

Example 1 Bifunctional epoxy resin ("Ep-100" manufactured by Yuka Shell Co., Ltd.
1 ", epoxy equivalent 500 eq / g) 100 g, dicyandiamide 3 g and 2-ethyl 4-methylimidazole 0.2 g as a catalyst were uniformly dissolved to obtain a varnish A. A woven glass cloth (unit weight: 215 g / m ² ) was impregnated with the varnish A and dried to obtain a prepreg A having a resin amount of 44% by weight.
70 parts by weight of a mixture of aluminum hydroxide and talc (weight ratio of 1: 1) as an inorganic filler was added to 100 parts by weight of the resin, and a varnish B was obtained. The varnish B was impregnated into a glass nonwoven fabric (unit weight: 100 g / m ² ) and dried to obtain a prepreg B containing 90% by weight of a resin containing an inorganic filler. Two prepregs B are stacked to form a core material layer, and one prepreg A is placed on each side of the core material layer to form a surface layer, and a copper foil (thickness 18 μm) is placed on the outermost surface at a temperature of 170 ° C. and pressure. It was heat-pressed and molded at 40 kg / cm ² for 60 minutes to obtain a copper-clad laminate having a plate thickness of 1.6 mm. The punching workability of the produced copper-clad laminate is shown in Table 1 together with the parts by weight of the inorganic filler relative to 100 parts by weight of the resin of the core layer and the glass transition temperature (Tg) of the laminate. The Tg of the laminate was measured by the TMA method.

Example 2 The same procedure as in Example 1 was carried out except that the amount of the inorganic filler in the varnish B was 160 parts by weight based on 100 parts by weight of the resin.

Example 3 Bifunctional epoxy resin ("Ep-100" manufactured by Yuka Shell Co., Ltd.)
1 ", epoxy equivalent 500 eq / g) 60 g and trifunctional epoxy resin (Mitsui Petrochemical" VG-3101 ", epoxy equivalent 210 eq / g) 17 g dicyandiamide 3"
g, 2-ethyl 4-methylimidazole as a catalyst 0.
2g was melt | dissolved uniformly and the varnish A'was obtained. A woven glass cloth (unit weight: 215 g / m ² ) was impregnated with the varnish A ′ and dried to obtain a prepreg A ′ having a resin amount of 44% by weight. Further, 120 parts by weight of a mixture of aluminum hydroxide and talc (weight ratio 1: 1) as an inorganic filler was added to 100 parts by weight of the resin in the above varnish A ′ to obtain a varnish B ′. Varnish B'is made of glass non-woven fabric (unit weight: 100 g / m ² ).
Was impregnated and dried to obtain a prepreg B ′ containing 90% by weight of a resin containing an inorganic filler. Two prepregs B'are superposed on each other to form a core material layer, one prepreg A'is placed on each side of the core material layer to form a surface layer, and a copper foil (thickness 18 μm) is placed on the outermost surface at a temperature of 170 ° C The plate was heat-pressed at a pressure of 40 kg / cm ² for 60 minutes to obtain a copper-clad laminate having a plate thickness of 1.6 mm. The punching workability of the produced copper-clad laminate was evaluated by the resin 100 of the core material layer.
It is shown in Table 1 together with the weight part of the inorganic filler with respect to the weight part and the glass transition temperature (Tg) of the laminate.

Comparative Example 1 The procedure of Example 1 was repeated except that the amount of the inorganic filler in the varnish B was 65 parts by weight based on 100 parts by weight of the resin.

Comparative Example 2 The procedure of Example 1 was repeated except that the amount of the inorganic filler in the varnish B was 165 parts by weight based on 100 parts by weight of the resin.

Comparative Example 3 Bifunctional epoxy resin ("Ep-100" manufactured by Yuka Shell Co., Ltd.
1 ", epoxy equivalent 500 eq / g) 50 g and trifunctional epoxy resin (Mitsui Petrochemical" VG-3101 ", epoxy equivalent 210 eq / g) 21 g dicyandiamide 3"
g, 2-ethyl 4-methylimidazole as a catalyst 0.
2g was melt | dissolved uniformly and the varnish A '' was obtained. A woven glass cloth (unit weight: 215 g / m ² ) was impregnated with the varnish A ″ and dried to obtain a prepreg A ″ having a resin amount of 44% by weight. Further, 120 parts by weight of a mixture of aluminum hydroxide and talc (weight ratio 1: 1) as an inorganic filler was added to 100 parts by weight of the resin in the above varnish A ″ to obtain a varnish B ″. Varnish B '' made of glass non-woven fabric (Unit weight: 100 g / m ² )
Was impregnated and dried to obtain a prepreg B ″ containing 90% by weight of a resin containing an inorganic filler. Two pieces of prepreg B '' are laminated to form a core layer, and one piece of prepreg A '' is placed on each side of the core layer to form a surface layer. A copper foil (18 μm thick) is placed on the outermost surface and the temperature is set. It was heated and pressed at 170 ° C. for 60 minutes at a pressure of 40 kg / cm ² to obtain a copper-clad laminate having a plate thickness of 1.6 mm. The punching workability of the produced copper-clad laminate was evaluated by the resin 100 of the core material layer.
It is shown in Table 1 together with the weight part of the inorganic filler with respect to the weight part and the glass transition temperature (Tg) of the laminate.

[0013]

[Table 1]

[0014]

As described above, in the composite laminate according to the present invention, the compounding amount of the inorganic filler in the resin of the core material layer is within a specific range, and the glass transition temperature of the laminate is below a specific temperature. By this, the punching workability can be made excellent.

Claims (1)

[Claims] 1. A composite laminated plate in which a glass nonwoven fabric impregnated with a thermosetting resin is used as a core material layer, and a glass woven fabric impregnated with a thermosetting resin is used as a surface layer, and a core material layer is provided. 70 to 160 parts by weight of an inorganic filler is mixed with 100 parts by weight of the resin in a thermosetting resin, and the glass transition temperature of the laminated plate is 145 ° C. or lower. .