JPH09275267A - Method for forming printed wiring sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an electrically conductive member from getting in a mesh sheet by a method wherein the mesh sheet woven from chemical fiber, metal fiber, or natural fiber is turned electrically conductive by electroless plating, plating resist is applied, a pattern is plated with megtal, and then the resist is separated off for the formation of a conductive pattern. SOLUTION: A mesh sheet 1 woven from chemical fiber such as polyester, nylon or the like, soluble fiber made from protein, or natural fiber such as silk or cotton is electrossly plated with metal, plating resist 3 is applied onto all the surface of the mesh sheet 1, a pattern is provided onto the plating resist 3, and the plating resist 3 is exposed to light and developed. The plating resist 3 is melted at a pattern 4 irradiated with no light, and the plating resist 3 is left unmelted on the residual part irradiated with light. Then, the mesh sheet 1 is electroplated with metal, whereby a conductive pattern 5 is formed on the pattern 4 of the mesh sheet 1 electrolessly plated with metal. When the resist 3 is separated off, a printed wiring sheet 6 provided with the conductive pattern 5 can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a printed wiring sheet based on a mesh sheet or a porous sheet in which various fibers are knitted.

[0002]

2. Description of the Related Art In a conventional printed wiring board, a thin copper plate is adhered to the surface of a resin substrate, a photosensitive emulsion is coated on the surface, and exposure / development etching is performed to form a pattern. And
In order to make the front and back patterns conductive, a hole was made in the pattern portion with a drill and plating was applied to the inner surface for conduction.

[0003]

In the above-mentioned prior art, the thin copper plate adhered to the resin substrate is easily peeled off, and if the adhesive is made strong to prevent it, the conductivity is deteriorated, and a hole is drilled for plating. There is a problem in that the work of conducting electricity is extremely troublesome and takes time.

[0004]

SUMMARY OF THE INVENTION The present invention aims to solve the above problems, and electrolessly plating the entire surface of a mesh sheet or porous sheet woven with chemical fibers, metal fibers, natural fibers, etc. It is characterized in that a plating resist is formed, the pattern portion is metal-plated, and the resist is peeled off to form a conductive pattern.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the illustrated embodiments. 1 is a synthetic fiber such as polyester and nylon, a soluble fiber made from protein,
It is a mesh sheet formed by knitting natural fibers such as silk and cotton into a sheet shape, or a porous sheet in which a thin plate is perforated by a punching drill, laser or the like. As shown in Fig. 2, electroless metal plating 2
Give. Next, as shown in FIG. 3, the plating resist 3 is applied to the entire surface, and the pattern is exposed and developed.

In the pattern portion 4 which is not exposed to light, the plating resist is melted, and the plating resist 3 remains only in the exposed portion. Next, when electroplating is performed with an apparatus as shown in FIG. 6, since the mesh sheet and the porous sheet 1 of the pattern portion are electroless metal plated as shown in FIG. 4, the conductive pattern 5 is further electroplated with metal. It is formed. Then, the plating resist 3 is peeled off to form a printed wiring sheet 6 having a conductive pattern 5.

[0007]

According to the present invention, chemical fibers, metal fibers,
The whole surface of the mesh sheet and porous sheet woven with natural fibers etc. is electrolessly plated to establish continuity, a plating resist is formed, the pattern part is metal-plated, and the resist is peeled off to form a conductive pattern. Therefore, the printed wiring sheet formed by the method of the present invention is a mesh sheet or porous sheet to obtain a strong double-sided conduction switch in which the electrically conductive member is difficult to enter and separate, and when several sheets are polymerized, as in the conventional case. Since the printed wiring sheet itself is breathable without requiring complicated steps such as drilling and plating, the holes are aligned and the metal paste 10 is formed as shown in FIG.
It is very easy if you embed. Further, since the printed wiring sheet of the present invention is flexible, it is not necessary to form the printed wiring board according to the shape of the installation place as in the conventional case,
As shown in FIG. 4, since the wiring can be rolled according to the shape of the wiring place, the space for wiring is extremely small and wiring is easy.

[0008] Further, if a mesh body made of fibers that can be dissolved in an acid / alkali solution such as protein fibers is used, the fibers in the portion that requires light transmission can be melted, so that the pattern can be obtained by simply sticking it on a glass plate. Glass substrate can be formed,
When used in a fax machine or the like, it has an effect that a light-transmissive substrate can be easily manufactured. Further, since the parts other than the pattern have air permeability, the heat dissipation is good and the parts attached to the printed wiring sheet can be cooled to prevent damage. Further, since it is a mesh sheet or a porous sheet, liquid can pass through it, so that both sides can be plated with an electric contact from one side as shown in FIG. or,
Since no copper plate is used, there is no need to use etching and the work is simple. Further, since there is no hole forming step, multi-layer conduction can be performed by embedding a metal paste, and since multi-layer conduction can be performed with the conduction paste, a large-sized printed wiring sheet of 1000 × 2000 mm can be manufactured.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a mesh sheet.

FIG. 2 is a cross-sectional view in which electroless plating is performed on the entire surface of the mesh sheet of FIG.

FIG. 3 is a cross-sectional view in which a plating resist is applied to FIG. 2 and a pattern is exposed and developed.

FIG. 4 is a sectional view of FIG. 3 with electro-metal plating.

5 is a cross-sectional view of a printed wiring sheet formed by peeling off the plating resist of FIG.

FIG. 6 is a front view of a main part of the apparatus for performing electroplating shown in FIG.

[Explanation of symbols]

 1 mesh sheet or porous sheet 2 electroless metal plating layer 3 plating resist layer 4 pattern part 5 electro metal plating layer of pattern part 6 printed wiring sheet

Claims (1)

[Claims] 1. A surface of a mesh sheet and a porous sheet woven of chemical fibers, metal fibers, natural fibers, etc. is electrolessly plated to establish conduction, a plating resist is formed, and a pattern portion is metal-plated to form a resist. A method for forming a printed wiring sheet, which comprises peeling to form a conductive pattern.