JP2923342B2 - Electric laminate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electric laminate used for electronic equipment / electric equipment, a computer, a communication equipment and the like.

[Conventional technology]

Conventionally, a laminated board in which a core portion is a nonwoven fabric and a surface portion is made of a glass cloth and resin is impregnated with a resin, since both the nonwoven fabric and the glass cloth use a resin having the same curing rate, the glass cloth below the metal foil is used. This causes the problem that the weaving time is raised on the surface of the metal foil, and the surface roughness becomes large, which hinders fine pattern formation.

[Problems to be solved by the invention]

As described in the related art, there is a problem in this type of conventional laminated plate that the surface roughness of the laminated plate is large. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the related art, and an object of the present invention is to provide an electric laminate having a small surface roughness.

[Means for solving the problem]

The present invention arranges a long glass cloth impregnated with a resin having a faster curing speed than the resin on the upper and lower surfaces of a long nonwoven fabric impregnated with an inorganic filler, and further arranges a long metal foil on the upper surface and / or the lower surface. The laminated body for electricity is characterized in that the laminated body is heated under no pressure and cut to the required dimensions, so that the resin under the metal foil hardens quickly and hardens, reducing the surface roughness. The present invention will be described in detail below.

As the resin used in the present invention, a phenol resin, an epoxy resin, an unsaturated polyester resin, a polyimide resin,
Polybutadiene resin, thermosetting polyphenylene oxide resin, fluorocarbon resin, etc. can be used alone, modified, or a mixture, but the curing speed of the resin impregnated in the glass cloth should be faster than the resin impregnated in the nonwoven fabric. is necessary. As a means for this, the addition of a curing agent, a cross-linking agent, a reaction initiator, and the like to the nonwoven fabric impregnating resin is eliminated, but even if it is used, a means for reducing the amount compared to the glass cloth impregnating resin is effective. The difference in curing speed is desirably 1 minute or more. For this reason, a curing agent, a cross-linking agent, a reaction initiator and the like are added to the glass cloth impregnating resin in an amount of 0.5 to 1.5 with respect to 100 parts by weight of the resin (hereinafter simply referred to as “parts”). It is preferable to add a part.

As the inorganic filler, calcium carbonate, aluminum hydroxide, talc, alumina, silica, magnesium carbonate and the like can be used, and 1 to 200 parts can be added to 100 parts of the resin. The nonwoven fabric is made of glass fiber, organic fiber, or the like, and any nonwoven fabric including spunbonded nonwoven fabric, glass paper, or the like can be used. The glass cloth is not particularly limited, and a commonly used glass cloth can be used as it is. As the metal foil, a single or alloy such as copper, aluminum, iron, nickel, and zinc can be used, and an adhesive layer can be provided on the adhesive surface as needed. The heating can be selected depending on the resin used, and the pressure is non-pressure only due to the weight of the laminate.

 Hereinafter, the present invention will be described based on examples.

〔Example〕

A 0.5-mm-thick glass non-woven fabric is impregnated with an unsaturated polyester resin containing 100% by weight of aluminum hydroxide (hereinafter simply referred to as "%") so that the resin amount becomes 45%. , On a 0.12mm thick glass cloth,
A resin-impregnated glass cloth substrate impregnated with 100 parts of unsaturated polyester resin and 1 part of dicumyl peroxide and impregnated so that the amount of resin becomes 45% is stacked one by one. The laminated body with the adhesive side of 0.035mm thick copper foil with adhesive on the outer layer is placed inside without pressure.
After heating at 140 ° C. for 20 minutes, it was cut into required dimensions to obtain a 0.8 mm-thick double-sided copper-clad laminate.

(Comparative example)

The same nonwoven fabric impregnating resin as in the example was treated in the same manner as in the example except that 1 part of dicumyl peroxide was added to 100 parts of the unsaturated polyester resin to obtain a double-sided copper-clad laminate having a thickness of 0.8 mm. .

Table 1 shows the performance of the laminates of the examples and the comparative examples.

[Effect of the Invention] The present invention is configured as described above. The electrical laminate having the configuration described in the claims has the effect of reducing the surface roughness and providing an optimal electrical laminate for the fine pattern.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B32B 15/08 B32B 27/04 B32B 5/28 B32B 17/04 H05K 1/03

Claims (1)

(57) [Claims] 1. A long glass cloth impregnated with a resin having a faster curing speed than the above resin is disposed on upper and lower surfaces of a long nonwoven fabric impregnated with a resin containing an inorganic filler, and a long metal foil is further provided on the upper and / or lower surfaces. An electric laminated board characterized in that the laminated body provided with is continuously heated under no pressure and then cut into required dimensions.