JPH0557852A - Laminated sheet for electrical application - Google Patents

Abstract

PURPOSE:To obtain a laminated sheet for electrical applications with an excellent high frequency characteristic and a high dielectric constant by integrally disposing metallic foil on the upper surface and/or lower surface of a polyphenylene resin sheet containing inorganic high dielectric particles. CONSTITUTION:An polyphenyleneoxide resin containing inorganic high dielectric particles, there is used an inorganic compound or the like that has a perovskite crystallized structure of each group of BaTiO3, SrTiO3, PbTi1/2, Zr1/2O3 and the like, or composite perovskite crystallized structure, or a single or composite of TiO2, ZrO2, and SnO2, wherein the particles are preferable to use since the dispersibility and reliability becomes excellent as they are finer. As thermoplastic resin, the whole of thermoplastic resin such as polystylene, polyethylene, or the like cam be employed in the present instance. Furthermore, a single, alloy, or composite foil of copper, aluminum, brass, nickel, iron, or the like is given as metallic foil in the present instance. As required, metallic foil is integrally disposed on the upper surface and/or the lower surface of a polyphenyleneoxide resin sheet containing inorganic high dielectric particles to thereby obtain a laminated sheet for electrical applications.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electronic equipment, electric equipment,
Used for computing equipment, communication equipment, etc., especially high frequency characteristics,
The present invention relates to an electric laminate having an excellent high dielectric constant.

[0002]

2. Description of the Related Art Conventionally, electronic equipment, electric equipment, computing equipment,
Thermoplastic resin sheets such as polyethylene, polyetherimide, polysulfone, and polyetherketone are used for electrical laminates that require high-frequency characteristics and high permittivity for communication devices and the like. However, although these thermoplastic resins have good high-frequency characteristics, they have a low dielectric constant, so that the high-frequency printed wiring board cannot be miniaturized.

[0003]

As described in the prior art, the conventional high-frequency electrical laminate made of a thermoplastic resin sheet has a low dielectric constant, and the high-frequency printed wiring board cannot be miniaturized. It was The present invention has been made in view of the above problems in the prior art, and an object of the present invention is to provide an electrical laminate excellent in high frequency characteristics and high dielectric constant.

[0004]

DISCLOSURE OF THE INVENTION The present invention is characterized in that an inorganic high dielectric particle-containing polyphenylene oxide resin sheet is provided with a metal foil on the upper surface and / or the lower surface thereof, if necessary, to form a body. Since the laminated plate has achieved the above object, the present invention will be described in detail below.

Thermoplastics Containing Inorganic High Dielectric Particles of the Present Invention
As the inorganic high dielectric particles of the resin sheet, BaTiO 3 is used.
₃System, SrTiO₃System, PbTi_1/2Zr_1/2O₃system,
Pb (Mg_2/3Nb_1/3) O₃System, Ba (Sn_xMg_Y
Ta_z) O₃System, Ba (Zr _xZn_yTa_z) O₃System
Perovskite type crystal structure and complex perovskite type structure
Those having a crystal structure or TiO₂, ZrO₂, SnO₂
Inorganic compounds such as single and complex oxides of
The finer the particles, the better the dispersibility and reliability, and it is desirable to use.
Polyphenylene oxide resin 100 weight
10 to 70 parts are added to the amount part (hereinafter simply referred to as part).
Preferably. That is, if it is less than 10 parts, the dielectric constant becomes high.
It is difficult to remove, and if it exceeds 70 parts, the moldability tends to decrease.
Because. As the polyphenylene oxide resin,
Thermoplastic polyphenylene oxide resin such as nonyl resin
Use of thermosetting polyphenylene oxide resin
You can The thickness of the sheet is not particularly limited, but is 0.05 to
It is convenient and preferable to use a 2 mm one. Sheeting
As steps, rolls, extrusions, injections, castings, presses, etc.
A step can be used and is not particularly limited. Money
Copper foil, aluminum, brass, nickel, iron
Can be used alone, alloy, composite foil, etc., epoxy
Resin, phenol resin, melamine resin, butyral resin
Adhesive with one side of metal foil coated in advance
An attached metal foil can also be used. Arrangement-as a unitizing means
Use any means such as press, roll, drum, etc.
You can

The present invention will be described below based on examples.

[0007]

Example 1 Twenty parts of titanium oxide powder was added to 100 parts of polyphenylene oxide resin, mixed, kneaded, and then formed into a sheet with an extruder. After the adhesive side of the agent-coated copper foil was arranged so as to face the sheet side, lamination was performed at 160 ° C. for 20 minutes to obtain a 1.6 mm-thick electrical laminate.

[0008]

Example 2 The same process as in Example 1 was carried out except that 40 parts of titanium oxide powder was added to obtain an electrical laminate having a thickness of 1.6 mm.

[0009]

Example 3 An electric laminate having a thickness of 1.6 mm was obtained in the same manner as in Example 1 except that 35 parts of barium titanate was added instead of the titanium oxide powder.

[0010]

Example 4 An electric laminate having a thickness of 1.6 mm was obtained in the same manner as in Example 1 except that 50 parts of barium titanate was added instead of the titanium oxide powder.

[0011]

[Comparative Example] The same procedure as in Example 1 was carried out except that no titanium oxide powder was used to obtain a 1.6 mm-thick electrical laminate.
The performance of the laminated plates of Examples 1 to 4 and Comparative Example is as shown in Table 1.

[0012]

[0013]

The present invention is constructed as described above.
It has been confirmed that the electrical laminate having the structure described in the claims has an improved dielectric constant and is excellent in the present invention.

Claims (1)

[Claims] 1. A laminated board for electrical use, wherein a metal foil is provided on the upper surface and / or the lower surface of a polyphenylene oxide resin sheet containing inorganic high-dielectric-constant particles, if necessary, and made into a body.