DE10254782A1 - Flexible printed circuit board for a foil keypad/foil-covered keypad, has a conductive coating with segments between strip conductors produced by applying a conductive coating - Google Patents

Abstract

A flexible printed circuit board (1) coated with a silver conductive paint/lacquer (2) has strip conductors (3). In one area (4) the silver conductive paint/lacquer between the strip conductors has been removed by a laser/chemical cutting process. Copper lining acts as a conductive coating.

Description

The invention relates to a conductive coated Slide for Membrane keyboards and / or foil-covered keyboards, the conductive coated film by material removal of the conductive coating is produced, the removal of material by mechanical and / or chemical process and / or laser process and / or grinding takes place.

So far, conductive coatings have been applied Foils for Membrane keyboards and / or foil-covered keyboards in the screen printing process manufactured, initially Films and screens must be created with the conductor tracks. This is, very time, material and labor consuming, what small numbers at high unit costs leads.

The object of the invention is a conductive coated Slide for Membrane keyboards and / or foil-covered keyboards of the beginning to create the type mentioned, in which the required conductor tracks by removing the conductive coating from the material in question Areas is reached and not done by printing.

This task is coated with conductive Foils for Membrane keyboards and / or foil-covered keyboards solved in that at one with conductive silver varnish or similar conductive coatings the areas outside the conductor tracks by appropriate Processes such as laser processing and / or polishing and / or grinding etc. ablative Processes are removed by chemical and / or mechanical means and only the conductor tracks remain.

In a preferred embodiment conductive coated and / or copper-clad foils for membrane keyboards and / or foil-covered keyboards are used with a conductive silver lacquer coated film the segments or areas between the conductor tracks removed by material removal, the material removal using laser removal processes he follows.

In a further preferred embodiment segments or areas between the conductor tracks by polishing and / or loops in the area.

The invention is based on a the drawing shown embodiment explained in more detail. It demonstrate:

1 : Cut through a conductive coated film for membrane keyboards and / or membrane-covered keyboards

2 : Top view of a conductive coated film for membrane keyboards and / or membrane covered keyboards

Designate in the figures, if not stated otherwise, the same sources of supply use the same parts of equal importance.

1.

foil

Second

silver lacquer

Third

conductor path

4th

Area between the conductor tracks

In 1 points the slide 1 made with conductive silver paint 2 is coated, conductor tracks 3 on. In the area 4 became the silver conductive varnish 2 removed between the conductor tracks.

In 2 is a film with different conductor tracks 3 and areas 4 shown between the conductor tracks.

Claims (8)

Conductively coated foils for membrane keyboards and / or foil-covered keyboards, characterized in that, in the case of a conductive coated foil, the segments and areas between the conductor tracks are produced by material removal of the conductive coating and the conductive coating of the conductor tracks remains. Conductive coated foils for Membrane keyboards and / or foil-covered keyboards according to claim 1, characterized in that the Material removal of the conductive Coating is achieved by selective polishing. Conductive coated foils for Membrane keyboards and / or foil-covered keyboards after one of the preceding claims, characterized in that the Material removal through selective grinding of the conductive coating is achieved. Conductive coated foils for Membrane keyboards and / or foil-covered keyboards after one of the preceding claims, characterized in that the Material removal of the conductive coating by laser ablation or the like Procedure is achieved. Conductive coated foils for Membrane keyboards and / or foil-covered keyboards after one of the preceding claims, characterized in that the Material removal is achieved by chemical processes. Conductive coated foils for Membrane keyboards and / or foil-covered keyboards after one of the preceding claims, characterized in that the conductive Coating is produced as a print with silver conductive paste. Conductively coated foils for membrane keyboards and / or foil-covered keyboards according to one of the preceding claims, thereby ge indicates that the conductive coating is copper cladding. Conductive coated foils for Membrane keyboards and / or foil-covered keyboards after one of the preceding claims, characterized in that the Foil for the production of membrane keyboards and / or foil-covered Keyboards with snap disks and / or magnetic keyboards is used, and serves as a contacting film.