JPH04103312A - Manufacture of fluorine resin metal coated laminate - Google Patents

Abstract

PURPOSE:To upgrade dielectric consonant, dielectric dissipation factor and insulation resistance by impregnating a fluorine resin fiber base with fluorine resin dispersion, overlapping prepregs burnt at the specified temperature and treating a laminate material with metallic foils on one or both surfaces at the specified temperature and pressure. CONSTITUTION:A fluorine resin fiber woven cloth or a non-woven cloth is impregnated with fluorine resin dispersion, and a plurality of prepregs 1 burnt at 330-430 deg.C are overlapped, and a laminate with metallic foils 2 dispersed on one or both faces is heat pressurized at 330-400 deg.C and 4-20kg/cm<2>. As for the fluorine resin, ethylene tetrafluoride resin is optimum from the viewpoint of resistance to heat and dielectric properties, adequate for and the thickness 50-500mum is adequate for the woven or non-woven cloth, and if the same is lower than that, fibers are likely to slide each other, and if it is higher than that, impregnation is short and insulation resistance is not satisfactory. The adhesion volume of impregnation fluorine resin should be in the range of 30-72wt.%, which makes good workability at the time of heat pressure molding. Fibers and resin are fusion bonded by said process to retain the fiber configuration of a base.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a fluororesin horizontal NI board, which is obtained by impregnating a fluororesin on a fluororesin 1lli fiber base material.

[Conventional technology]

The steel laminated plate for printed 4I plates can be made of paper, glass fiber, Kevlar St miscellaneous, etc. No. 8K 7! / -h
It has become widely practiced to completely impregnate a thermosetting resin such as resin, epoxy SLN, or polyimide resin, and then coat the surface with gold II4 foil such as copper foil.

However, recently, instead of the above-mentioned thermosetting*M-based laminate, laminates impregnated with two-layer resin T-fiber base have been attracting attention. .

The dielectric constant and dielectric loss tangent of fluororesin are 4. compared to thermosetting resin. However, when used in a printed theater board, the signal transmission speed and transmission loss of the circuit are greatly influenced by the dielectric constant and dielectric positive image of the substrate. That is, the signal transmission speed 11+ is greater when the -electric constant is φ, and the smaller the dielectric loss tangent is, the smaller the transmission loss is.

Due to such whitening, low dielectric constant and low dielectric loss tangent are required for substrates in applications such as combinators that require advanced transmission and high efficiency, and fluororesin JLILL is attracting attention. Conventional fluororesin laminates manufactured with a whitening of 0 or more are mainly made of glass pongee cloth [pre-preg upper mold obtained by impregnating 1 ton of 7-carbon resin and baking at about 400°C. , further overlap both sides or one piece of djJVc@ foil and heat and pressurize it to make an integrated base material.
It is most commonly used because of its hot processability, insulation resistance, elasticity, etc., but the dielectric constant of glass is about 6.0, and that of fluororesin is 2. It is very large compared to OK and is inappropriate.

[Problems to be Solved by the Invention] As a fiber that can replace the glass fiber conventionally used in the above-mentioned fluororesin laminate, there is 7 #C ballast M pongee. Woven and non-woven fabrics made of these fibers have excellent heat resistance, chemical resistance, and non-adhesive properties, so they are used for applications that take advantage of these characteristics. Since the image layering properties and layer density are confusing, there are no examples of it being unsuitable for use as a fiber base material for laminates.

In view of the above problems, the present invention provides a method for manufacturing a fluororesin laminate by impregnating a fluororesin fiber base material with a fluororesin. purpose.

[Means for solving problems]

The present invention, which was obtained in order to achieve the above objectives, consists of stacking a plurality of sheets of prepreg obtained by adding and heating a fluororesin JLL base material with two atmosphere resins, and further adding gold A11L to one or both sides of the prepreg.
This is a two-layer S-glue-gold laminate made by integrating the recessed laminates, but a plurality of prepregs obtained by impregnating a fluororesin fiber woven or non-woven fabric with a fluororesin disbarge material and firing at 330 to 430°C. Laminated material made of stacked sheets with metal foil on one or both sides - 330-400℃, 4-20kg
This is a manufacturing method in which a 1-% image is obtained by heating and pressurizing the film in a vacuum.

The key point in the manufacturing method of the present invention is that the fluororesin and fluororesin fibers can be melted at 330°C or higher.
(However, thermal deterioration is severe at temperatures above 430℃)
. Therefore, 1. The prepreg preparation and the heating temperature of the laminated material were set at 1330° C. or higher. In addition, the fluororesin was pressurized at 330°C or higher, r4~20kg, and 101F, but if the pressure was higher than this, the entire laminated material would become a rice cracker-like solid, and the insulation resistance test would not satisfy the required values for the Jinjae laminate. Moreover, when it is a fiber, it does not exhibit the thermal expansion suppressing effect of χ, but when it is a solid, it shows a large value of °C.

The fluorine resin 14II & fluorine resin, 47-fluorinated ethylene resin, and @(PTFE) used in the present invention are optimal in terms of heat resistance and dielectric properties.

The thickness of textile or nonwoven fabric is generally 50 to 500 μm, but if it is less than 50 μm, it is too thin and tends to shift easily and become uneven, and if it is more than 500 μm, it is too thick and resin impregnation is insufficient and insulation resistance is required. This results in unsatisfactory physical properties.

The amount of the 2x*m layer to be impregnated is 30 to 72% by weight. It differs depending on the type 1 of woven fabric and non-woven fabric, but generally coating 11
Repeat t1 to 3 times.℃The adhesion amount becomes 30'IL amount%, and 4
- After repeating 7 times, the amount of adhesion becomes 74 weight less. Based on the number of times of application, the amount of non-adherent resin is preferably 30 to 74% by weight, and 30 to 74% by weight is also appropriate in terms of workability when stacking the prepared prepregs and molding them under heat and pressure. Below 30% by weight,
Voids are likely to occur when stacking prepregs and forming them.
If the amount is 74% by weight or more, the number of coatings will be large and the work efficiency will be reduced.

The pressure during molding is 4 to 20 kg/al11 as described above.
However, if the weight is less than 4 kg/al11, voids are likely to remain during molding, and if the weight is more than 20 kg/d, the fiber becomes a rice cracker-like solid and loses its usefulness as a base material for the 111 fiber.

The dielectric constant of the laminate produced according to the present invention is close to 2. However, since the thermal expansion is larger than that of the base glass, fluorine According to the method VC, adding an inorganic filler during resin dispersion. Its addition lid; 10-100 to resin
% is appropriate. Below 10%, there is little effect;
% or more, impregnation becomes poor and is inappropriate. #, fused silica, titanium oxide, etc. with a particle size of 1105 to 9 μm are suitable as the mechanical agent.

[Effect]

The fluororesin gold M5B lamination according to the present invention is made of fluororesin gold M5B.
II#IfF material, consisting of impregnated fluorine aa and metal foil, laminated material t-350~400℃, 4~2Okg/
cl't' By heating and pressurizing, the ultrafine and resin are fused and the base material has a sickle fiber shape! The present invention has made it possible to hold one meeting.

Cam Example] An actual example of the present invention will be explained next. As shown in Figure 1,
Three prepreg sheets J1 with a thickness CL of 24 am are coated with a steel foil upper die 1 with a thickness of 18 μm on both outer sides thereof.

The manufacturing method will be specifically explained below. Two pieces of yuzu oil fiber cloth (
4cm L2m Toyo7anl 4l 4W, Showa Kogyo)
K, 47-ethylene resin disk barge (boria c
InTFE, Mitsui DuPont 71: l Rochemical Co., Ltd.) was impregnated with a uniformly dispersed compounding agent in which fine fused silica powder with a particle size α5 μm was added to the resin in an amount of 30% by weight,
After impregnating, drying and baking were carried out at 100 to 400°C. This impregnation and firing process was repeated 4 times to obtain a resin content of 68NIJ1% and a thickness of α24.
One ton of fluororesin prepreg was produced. 3 layers of this Gripregusse are layered and 18μm thick copper foil 2 is placed on both sides.
380℃, 10 toughness/at! The two resin metal-clad laminate plates were obtained by integrating them under heat and pressure.

(Relative softness frl) As a comparative example to the embodiment of the present invention, a glass cloth (Nittobo) having a thickness of αjaj was used as a 7M fiber base material, but it was made into a meat-like material as in the embodiment, and a! gI content 68%, thickness (L12
- Obtained prepreg money. Furthermore, this prepreg 1r6
Stacked, both 111ic 18μm thick steel i1! Two pieces of fat-like skin were obtained by stacking the samples in Example and Meat-like manner.

(Test) Samples obtained in Examples and Comparative Examples: Koden Haya, Koden Shogo, and ?
The edge resistance value Vlllll was determined. The values are shown in Table 1.

Table 1 [Effects of the Invention] As shown in Table 1, the method 1c of the present invention provides a superior dielectric property compared to the conventional fluorine resin metal laminate using glass cloth. It was confirmed that the material showed the following properties: dielectric loss tangent, dielectric loss tangent, and insulation resistance.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a gold maple clad laminate according to the present invention. 1...prepreg, 2...mi
. Party 1 Figure ＼

Claims (2)

[Claims] 1. 330 is a laminated material in which multiple sheets of prepreg obtained by impregnating a fluororesin fiber-based woven fabric or non-woven fabric with a fluororesin dispersion and firing it at 330 to 430°C are stacked and metal foil is arranged on one or both of the outer sides. ~400℃, 4-2
A method for producing a fluororesin metal-clad laminate by heating and pressing at 0 kg/cm^2. 2. 2. The method for producing a fluororesin metal-clad laminate according to claim 1, characterized in that the fluororesin dispersion contains an inorganic filler of 10 to 100% by weight based on the resin.