JPH09283877A - Printed conducting sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a simple and strong double-sided electric conduction pattern switch, by forming a pattern on a mesh sheet wherein chemical fiber, metal fiber, natural fiber, etc., are knitted, or a porous sheet, by using electrically conducting members. SOLUTION: Carbon ink and metal paste 2 are printed with a squeegee by using a screen printing method, on a mesh sheet wherein chemical fiber such as polyester and nylon, or soluble fiber whose material is protein, or natural fiber such as silk and cotton is knitted in a sheet, or on a porous sheet 1 wherein many holes are formed on a thin board with a punching drill, laser, etc., and a printed conducting sheet 3 is formed. Thereby electrically conducting members penetrate into the mesh sheet or the porous sheet, and a strong double- sided electric conduction pattern.switch which is hard to be separated can be obtained. When several numbers of sheets are stacked, complex processes in the conventional case wherein holes are made and plating is performed are unnecessary. The holes are aligned, and metal paste is buried, so that processes are very simple.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed conductive sheet based on a mesh sheet or a thin porous sheet woven with various fibers.

[0002]

2. Description of the Related Art In a conventional printed circuit board, a thin copper plate is adhered to the surface of a resin substrate, a photosensitive emulsion is coated on the surface, and exposure and development etching is performed to form a pattern. Then, in order to conduct the front and back patterns, a hole was made in the pattern portion with a drill to plate 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 is intended to solve the above problems and forms a pattern on a mesh sheet or porous sheet woven with chemical fibers, metal fibers, natural fibers or the like with an electrically conductive member. It features a printed conductive sheet.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 is a first embodiment of the printed wiring sheet molding of the present invention. 1 is a mesh sheet formed by knitting synthetic fibers such as polyester / nylon and the like, soluble fibers made of proteins, natural fibers such as silk and cotton, or a thin plate having a perforation formed by punching drill / laser etc. A conductive sheet, on which a carbon ink or a metal paste 2 is imprinted with a squeegee by a screen printing method, to form a printed conductive sheet 3. The metal paste 2 may be plated to prevent mold collapse and improve electrical conductivity.

FIG. 2 shows a second embodiment of the molding of the printed conductive sheet of the present invention. 4 is a mesh sheet or a porous sheet similar to that of the first embodiment, coated with photosensitive emulsion 5 so as to wrap it from both sides, exposed and developed the pattern, and washed the photosensitive emulsion of pattern portion 6 which was not exposed to light. Removed,
A metal paste 7 is embedded in the portion, the other photosensitive emulsion 5 is dissolved and removed, and plating 8 is performed to form a printed conductive sheet 9 having a conductive pattern formed thereon.

Further, as shown in FIG. 5, a mesh sheet or porous sheet 1 is coated with a photosensitive emulsion as in the first embodiment, and a pattern is exposed and developed to form a pattern 10, and an apparatus as shown in FIG. 6 is formed thereon. 7 by applying metal electroplating 11 by
As described above, the printed conductive sheet 12 having the pattern of the electrically conductive member is formed. Further, the same mesh sheet or porous sheet as in the first embodiment may be coated with a photosensitive paste containing metal, exposed and developed to form a pattern, and further metal plated.

[0008]

According to the present invention, chemical fibers, metal fibers,
Since the pattern is formed on the mesh sheet or porous sheet woven with natural fibers etc. by the electrically conductive member, the electrically conductive member will not enter into the mesh sheet or the porous sheet to obtain a strong double-sided conductive pattern switch. The
When several sheets are polymerized, unlike the conventional case, there is no need for complicated steps such as perforating and plating, and since the printed conductive sheet itself is breathable, the holes are aligned and the metal paste 13 is applied as shown in FIG. It is easy to embed and very easy. or,
Since the printed conductive sheet of the present invention is flexible, it is not necessary to form a printed circuit board according to the shape of the installation place as in the prior art, and the wiring can be performed by rolling it according to the shape of the wiring place as shown in FIG. The space is very small and wiring is easy.

If a mesh body made of fibers such as protein fibers which can be dissolved in an acid / alkali solution is used, the fibers in the portion requiring light transmission can be melted. 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. In addition, since the portion other than the pattern has air permeability, the heat dissipation is good and the parts attached to the printed conductive sheet can be cooled to prevent damage. In addition, since it is a mesh sheet or a porous sheet, liquid can pass through it, so both sides can be plated with electrical contacts from one side. Further, since no copper plate is used, there is no need to use etching and the work is simple. In addition, since there is no perforation step, multi-layered conduction can be achieved by embedding a metal paste, and since multi-layered conduction can be performed with the conduction paste, it is possible to manufacture a large-sized printed conductive sheet of 1000 × 2000 mm.

[Brief description of drawings]

FIG. 1 is a first embodiment of the method for forming a printed conductive sheet of the present invention.

FIG. 2 is a second embodiment of the method for forming a printed conductive sheet of the present invention.

FIG. 3 is a front cross-sectional view in which a printed conductive sheet of the present invention is multilayer-polymerized and a metal paste is embedded to conduct electricity.

FIG. 4 is a perspective view in which the printed conductive sheet of the present invention is wound.

FIG. 5 is a cross-sectional view in which a photosensitive emulsion pattern is formed on a mesh sheet.

FIG. 6 is a cutaway front view of an essential part of an apparatus for performing metal electroplating on the pattern of FIG.

FIG. 7 is a cross-sectional view of the printed conductive sheet formed according to FIG.

[Explanation of symbols]

 1,4 Mesh sheet or porous sheet 2,7,10 Metal paste 3,9,12 Printed conductive sheet 5 Photosensitive emulsion 8,11 Metal electroplating

Claims (1)

[Claims] 1. A printed conductive sheet in which a pattern is formed by a conductive sheet on a mesh sheet or porous sheet woven of chemical fibers, metal fibers, natural fibers and the like.