JPS6369635A - Electrical laminated board - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an electrical laminate used in electrical equipment, electronic equipment, communication equipment, computing equipment, etc.

[Background technology]

Traditionally, paper, glass woven fabric, phenolic resin, and ebony V
An electrical laminate is manufactured by laminating and molding a laminate in which a required number of resin-impregnated base materials impregnated with a resin, Boliimi F resin and dried, and metal foil are layered. The electrical constant is relatively large, 5 when using epoxy resin-impregnated glass cloth and 4.0 when using polyimide resin glass cloth, so it is a communication device! When used as a printed wiring board for S% calculation equipment, the high frequency characteristics are insufficient;
For arithmetic circuits and communication equipment circuits, restrictions are added and it is rated B.

As a countermeasure to this problem, a laminated plate made entirely of fluororesin, which has better high-frequency characteristics, has been developed, but it is expensive and cannot be widely used.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and its purpose is to provide a small dielectric constant, good high frequency characteristics, and to enable mounting of high frequency arithmetic circuits and communication circuits when used as a printed wiring board. The object of the present invention is to provide an electrical laminate that can be used in a variety of applications and has excellent insulation properties.

[Disclosure of the invention]

The present invention is made by laminating and molding a laminate in which one plate of gold on one side and one plate of 'II foil-clad fluororesin resin are placed on the upper and lower surfaces of resin, with the gold foil side facing outward. This invention is an electrical laminate having the following characteristics, and the high frequency characteristics of the laminate can be improved due to the fluororesin layer having excellent high frequency characteristics.The present invention will be described in detail below.

The resins of the single-sided metal-clad fluororesin laminate included in the present invention include tetrafluoroethylene V resin, tetrafluoroethylene perfluorovinyl ether copolymer, tetrafluoroethylene hexapropylene copolymer, and tetrafluoroethylene hexapropylene copolymer. All fluororesins such as fluorinated ethylene ethylene copolymer, trifluorinated chlorinated ethylene resin, etc. can be used, and as base materials, inorganic fibers such as glass and asbestos, polyester, polyamide, polyvinyl alcohol, acrylic, A resin-impregnated base in which the base material is impregnated with the resin, which can be wrapped around a woven fabric, non-woven fabric, mat, paper, etc. made of organic synthetic fibers such as 7 x wood or natural FFI fibers such as cotton. It is obtained by laminating a laminate in which a required number of fluororesin films are stacked on top of each other, with fluororesin films interposed at required positions as necessary, and a metal foil such as copper foil is provided on one side of the laminate. Note that it is desirable to roughen the surface of the single-sided metal-clad fluororesin laminate opposite to the metal foil in order to further improve interlayer adhesion. The resin layer may include phenol resin, cresol resin, epoxy resin, unsaturated polyester resin, melamine resin, Polyimide F, polybutadiene, polyamide, polyamideimide, polysulfone, polyphenylene sulfide, polyphenylene oxide, polybutylene terephthalate, polyether ether ketone, etc. A resin layer, a resin film, a resin sheet, or a resin-impregnated base material obtained by impregnating the base material with these resins and drying them, preferably a resin-impregnated base material with higher thickness accuracy. It is desirable to use a base material, and more preferably, by using an epoxy resin, polyimide resin, etc., which has a lower melting point than the fluororesin as the resin-impregnated base material, the temperature during lamination molding can be lower than that of the fluororesin laminate. There are advantages to being able to do so. Note that as the metal foil, a single alloy foil of copper, iron, aluminum, nickel, zinc, etc. is used.

The present invention will be explained below based on examples.

Example 1 A glass cloth with a thickness of 0.15 fII was impregnated with an epoxy resin containing a curing agent and dried, and the epoxy V resin was impregnated with a masonry resin (hereinafter simply referred to as scratches) on two pieces of glass cloth. , A laminate is formed in which a single-sided steel-clad glass cloth base fluororesin laminate with a thickness of Q and 4 fi is placed on the bottom surface with the copper foil side facing outward, and the opposite surface of the steel foil is roughened by sandblasting. Laminate molding was carried out at 170° C. for 90 minutes at a pressure of 4°C to obtain an electrical laminate.

Practical row 2 Polyimide resin-impregnated glass cloth 2 with a resin amount of 5G obtained by impregnating a glass cloth with a thickness of Q and 15 m with polyimide resin (Roosboulin Co., Ltd., trade name: Kelimide 601) and drying it.
The same single-sided copper-clad glass cloth base fluorocarbon resin laminate as in Example 1 was placed on the upper and lower surfaces of the sheet, with the steel foil side facing outward, and the opposite side of the copper foil was roughened by sandblasting. An electrical laminate was obtained by lamination molding for 90 minutes at a molding pressure of 2 o'v'd -200°C.

Comparative Example 1 On 8 sheets of Evoki V resin-impregnated glass cloth, which is the same as in Example f41,
The laminates each having a copper foil with a thickness of 0.018 aug arranged on the lower surface were laminated and molded at 170° C. for 90 minutes at a molding pressure of 211 kid to obtain an electrical laminate.

Comparative Example 2 On 8 sheets of the same polyimide resin-impregnated glass cloth as in Example 2,
The laminates each having a copper foil of 0.018 fl thick disposed on the lower surface were laminated and molded at 200° C. for 90 minutes under a molding pressure of 204° C. to obtain an electrical laminate.

siI of electrical laminates of Examples 1 and 2 and Comparative Examples 1 and 2
! s is as shown in Table 1.

Table 1 [Effects of the Invention] In the present invention, since the fluororesin-soaked plate is present in the layer, the power peak is small and the high frequency characteristics are good, resulting in improved efficiency when used as a printed wiring board. It is possible to implement a sieve frequency calculation circuit and a communication T-& circuit using a frequency clock.

Claims (2)

[Claims] (1) An electrical laminate characterized in that it is formed by laminating and molding a laminate in which single-sided metal foil-clad fluororesin laminates are disposed on the upper and lower surfaces of a resin layer, respectively, with the metal foil on the outside. (2) The electrical laminate according to claim 1, wherein the resin layer is a resin-impregnated base material.