JPH03183187A - Laminated board for electrical use - Google Patents

Abstract

PURPOSE:To effect laminated boards for electrical use excellent in high-frequency characteristics by using a resin-impregnated fluororesin paper having a specific thickness for at least a piece of resin-impregnated base material. CONSTITUTION:A laminated board for electrical use monolithically prepared from laminates of a predetermined number of resin-impregnated base materials each metal-foiled in the top and bottom uses resin-impregnated fluororesin paper for at least a piece of resin-impregnated base material. The fluororesin paper must be 150-350% in elongation: less than 150% is susceptible to damage in handling, and more than 350% keeps distortion in handling to decrease dimensional stability. It may be possible to use metal foils composed of single, alloyed or composite material of Cu, Al, Ni, Zn, Fe, etc., and to provide an adhesive layer on a single surface of each metal foil so as to improve adhesiveness as necessary.

Description

[Detailed Description of the Invention] [Industrial Use Separation] This light four is electricity! This is related to the laminate used by computer experts, computer experts, etc.

[Conventional technology]

Conventionally, we have produced a laminate made by layering the required number of resin-impregnated base materials, which are made by impregnating and drying paper or glass woven fabric with phenol resin, epoxy resin, or polyimide resin, and metal foil! - The dielectric constant of this laminated board is 5.01 when using epoxy resin-impregnated glass cloth, and 5.01 when using polyimide resin glass cloth. 40, which is relatively large, and therefore, when used as a printed wiring board, the high frequency characteristics are insufficient, and restrictions have been imposed on high frequency calculation circuits and communication equipment circuits. For this purpose, kraft paper or glass woven cloth impregnated with fluororesin, such as kraft paper impregnated with fluororesin or glass woven cloth impregnated with fluororesin, were tried, but the '7-P resin armpit was in the form of an emulsion. Because there is only a supply of There was a problem in that high temperature molding at temperatures above ℃ was required.

[Problem that the invention seeks to solve]

As described in the prior art, laminates for drowsiness made of resin-impregnated base materials in which kraft paper or glass woven HI is impregnated with epoxy resin or polyimide resin lack high frequency characteristics.

On the other hand, electrical laminates made of a resin-impregnated base material impregnated with fluorine 411111't kraft paper or glass woven fabric have low productivity.The present invention was made in view of the above-mentioned problems in the conventional technology. The purpose is to provide an electrical M-layer board that has excellent high frequency characteristics while maintaining productivity.

[Means for solving problems]

The present invention provides the upper and/or lower surfaces of the required number of resin-impregnated substrates.
In the electrical M circumferential plate formed by integrating the NtwI body on which the Nf metal foil is arranged, at least one of the resin-impregnated base materials is
This is an electrical laminate that is characterized by being a resin-impregnated 7-layer resin paper, so it has good high frequency characteristics and has a 7-layer resin impregnated with 7-layer resin. Except for the use of base resin, productivity can be maintained, and the present invention will be described in detail below.

Examples of resins for the resin-impregnated base material used in the present invention include phenolic resin, cresol resin, epoxy resin, unsaturated polyester resin, melamine resin, polyimide, polybutadiene, polyamide, polyamideimide, polysulfone,
Polyphenylene sulfide, polyphenylene oxide, polybutylene terephthalate, polyetheretherkatonfu J base resin, etc. alone, modified products, mixtures, etc. are used6, and if necessary, water, methyl alcohol,
It contains solvents such as acetone, cyclohexanone, and styrene, and the base material is tri7Q chlorinated ethylene resin,
Paper is made from two-y base resin edge stitches such as tetrafluorocarbon resin, tetrafluorocarbon resin, 7-propylene co-rectangular polymer resin, and tetrafluoroethylene perfluorovinyl ether co-polymer resin. 7-X.

Base resin paper can be used for all of the required number of resin-impregnated base materials (or even just the central part of the required number of laminated sheets, or only the outermost layer, or alternately laminated with regular resin-impregnated base materials). Although it is optional, it is necessary to roughen at least one sheet of the resin-impregnated base material.The fluororesin paper preferably has an elongation of 150 to 350. If b0 is less than 1504, it will break during handling, and if it exceeds 350%, strain will remain during handling and dimensional stability will decrease. As the metal foil, single, alloy, or composite foils of steel, aluminum, Nikel, zinc, iron, etc. are used, and if necessary, an adhesive layer is provided on one side of the metal foil to further improve adhesive properties. You can also leave it there. Lamination-imaging means include presses, multistage presses, multirolls, and double belts.

Any method such as incomparable heating can be selected and is not particularly limited.

The invention will be explained below based on examples.

Example: A paper made from tetrattylated ethylene perfluorovinyl ether copolymer resin fiber, thickness 400 microns, elongation rate 25.
Section 0's 7. V-solan resin paper 1c, resin amount after drying is 45
Three sheets of resin-impregnated fluororesin paper obtained by applying hardening agent-containing epoxy resin varnish gold-impregnated and drying are stacked on top and bottom so as to have a thickness of 1,000 yen, respectively. The arranged laminate was molded at a molding pressure of 30/d at 170°C.
A double-sided copper-clad electrical laminate having a thickness of 1.2 mm was obtained by cross-layer forming for 90 minutes.

Comparative Example 1 Hardening agent-containing ebo-beef IIF17 varnish was applied to a varnish of 0.2M
After drying, impregnate a glass woven fabric with a resin-impregnated glass fabric so that the resin volume becomes 45% by weight and 41%, and dry it. An electrical laminate having a thickness of 1.21 mm was obtained by processing in the same manner as in the practical example except that a laminate having copper foils provided thereon was used.

Comparative Example 2 Resin-impregnated glass woven fabric 6 obtained by impregnating and drying 47-ethylene resin emulsion gold, thickness □, 2 pieces of Tis woven fabric so that the resin path becomes 45 weight 1 t 96 after drying. An n4-layer body with binder-coated copper foil of 0.035 m thick was placed on the upper and lower surfaces of the stacked sheets, respectively, at a molding pressure of 30 KQ/d.

Laminate molding was performed at 335° C. for 60 minutes to form an electrical laminated sheet metal with a thickness of 1.2 tm.

The performances of the electrical laminates of Examples and Comparative Examples 1 and 2 are shown in Table 1.

Sho *This is the ratio when Comparative Example 1 is set as 100.

〔Effect of the invention〕

The present invention is constructed as described above. Electrical performance with the configuration described in the claims! - Can you maintain productivity while staying on the board? a: There is an effect of improving single frequency characteristics.

Claims (2)

[Claims] (1) In an electrical laminate formed by integrating a laminate in which a required number of resin-impregnated substrates are provided with metal foil on the upper and/or lower surfaces, at least one of the resin-impregnated substrates is made of resin-impregnated fluororesin. An electrical laminate characterized by being made of paper. (2) The electrical laminate according to claim 1, wherein the fluororesin paper has an elongation of 150 to 350%.