CN2480966Y

CN2480966Y - Film circuit board and film switch

Info

Publication number: CN2480966Y
Application number: CN 01214483
Authority: CN
Inventors: 官卫平
Original assignee: Dai Shenjian
Current assignee: Dai Shenjian
Priority date: 2001-03-13
Filing date: 2001-03-13
Publication date: 2002-03-06
Anticipated expiration: 2011-03-13

Abstract

The utility model relates to a film circuit board and film switch, wherein the utility model comprises a base film and a conducting layer, the difference is that the conducting layer 1 is one layer of metal film, the base film is composed by a polyester inner film 3 and a polypropylene outer film 4, a location corresponding to the conducting layer 1 of the metal film is provided with a conducting circuitry 2 made of a conducting printing ink. The utility model has low resistance, high sensitivity, low cost and favorable consistency without lead pollution.

Description

A kind of film circuit board, thin film switch

The utility model relates to a kind of film circuit board that forms on the public dielectric substrate that only is included in.

Existing film circuit board is to be formed by the silk screen printing manufacturing, is to have one deck conductive printing ink layer on film substrate, is furnished with some silver slurry lines on conductive printing ink layer.This product contact resistance height, sensitivity is low, and has certain lead contamination owing to the electrically conductive ink consumption is too high.

The purpose of this utility model is achieved in that film circuit board, thin film switch comprise basement membrane, conductive layer, and different is that described conductive layer is the layer of metal plated film.

Because this novel thin film circuit board, thin film switch are to be conductive layer with the coat of metal, so it conducts electricity very well, and contact resistance reduces by 10 times than original product, and sensitivity greatly improves; Again owing to also have the electrically conductive ink circuit in the coat of metal, so its electric conductivity is stable, does not influence conduction because of the coat of metal has scratch; Again because this product is to print the conducting wire with electrically conductive ink, and traditional product is to do conductive layer with electrically conductive ink, therefore this product electrically conductive ink consumption is few, can not cause lead contamination, again because this product adopts composite material to do basement membrane, both guarantee electric property and stiffness, flexibility and the durability of product, reduced the manufacturing cost of product again.

Below in conjunction with accompanying drawing the technical solution of the utility model is further described.

Fig. 1 is the structural representation of film circuit board;

In the specific implementation, identical with original film circuit board and thin film switch, also comprise basement membrane and the conductive layer 1 that invests the epilamellar different circuit of designing as required of difformity, this conductive layer both can be designed as a circuit, also can be designed to a utmost point of switch, as Fig. 1; In order to reduce the resistance of conductive layer 1, improve the sensitivity of product, conductive layer 1 is selected metal coating for use, because metal coating is very thin, might be caused line interruption by scratch in process of production, in the metal-plated rete, also be provided with the conducting wire 2 that some are made by electrically conductive ink; For film circuit board,, can thin film circuit be clipped in up and down between two-layer basement membrane at the attached again layer protective layer of whole wiring board upper surface for preventing transportation or damage circuit when using; And for switch, then need switch the two poles of the earth are put in opposite directions, its assembling mode is identical with existing thin film switch, also can be on an aforesaid switch pole plate, enclose one deck, total inner surface all is coated with the basement membrane of metal coating another pole plate as switch, in original product, the general polyester film that adopts 32 μ m of basement membrane, but because of the polyester film price more expensive, and in temperature crisp fractureing taken place easily during the end of than, therefore we adopt compound basement membrane, invest one deck toughness with one deck polyester inner membrance 3 and are composited on the adventitia 4 preferably, the film that this adventitia 4 can select for use polypropylene to make, the low price of polypropylene film, and its very expansion property and at low temperatures pliability are all good than polyester film; The thickness of polyester inner membrance 3 can be selected as required, is typically chosen in the thermal endurance that then both can keep polyester film in 8～14 mu m ranges, can save cost again as far as possible; Then this moment, polypropylene adventitia 4 thickness was chosen in 18～22 mu m ranges to guarantee the characteristic such as wear-resisting of product.

Claims

1, a kind of film circuit board, thin film switch comprise basement membrane, conductive layer, it is characterized in that: described conductive layer (1) is the layer of metal plated film.

2, film circuit board according to claim 1, thin film switch is characterized in that: with the corresponding position of metal coating conductive layer (1), also be provided with the conducting wire (2) that electrically conductive ink is made.

3, film circuit board according to claim 1 and 2, thin film switch is characterized in that: described basement membrane is compound basement membrane, is composited by one deck polyester inner membrance (3) and one deck adventitia (4), and conductive layer (1) invests on polyester inner membrance (3) inner surface.

4, film circuit board according to claim 3, thin film switch is characterized in that: described adventitia (4) is a polypropylene film.

5, film circuit board according to claim 4, thin film switch is characterized in that: the thickness of described polyester inner membrance (3) is 8～14 μ m, and the thickness of described polypropylene adventitia (4) is 18～22 μ m.

6, thin film switch according to claim 1 and 2 is characterized in that: the shape of the conductive layer (1) on the pole plate of switch is set as required, and is covered by metal coating fully on another pad-face.