The membrane switch is a switch made of a conductive paste printed contact circuit on a flexible polycarbonate or a polyester film, and is a type of a contact switch.

The membrane switch is a flat type, multi-layer combination, sealed structure, and is an assembly of an electronic whole machine operating system integrating a key switch, a panel function mark, a reading transparent window, an indicator window hole and a circuit.

It has the following four characteristics:

(1) Durability

The life of a membrane switch can generally reach more than one million times. The reason for this long life is that the action of the switch is only achieved by the vertical movement of the elastic film. Although the elastic film has undergone millions of peristalsis, the creep is small, only 0.1~0.3mm (both switching stroke), and the rationality of material selection is far from the yield limit of the film. Therefore, the film material Can withstand more than one million life without deformation. On the other hand, the contacts of the switch are in vertical contact with very little wear; the screen printed contacts can be formed to a sufficient thickness and a layer of conductive carbon is printed on the silver paste contacts to achieve high Wear-resistant, self-lubricating, so the life of the membrane switch is more than ten times higher than the mechanical contact switch.

(2) good sealing performance

Since the metal membrane switch is an integral sealing structure, the contacts of the switch are not eroded by harmful gases and are not easily oxidized; and are waterproof and dustproof, so that they are more suitable for use in various harsh environments.

(3) Small size, light weight and reliable structure

The membrane switch can be arranged in a combination to form a membrane keyboard, which has a high density, and is a sealed sheet structure composed of a plurality of layers of membranes. The connecting lines and the lead wires between all the switches are screen printed at one time. Completed, the total thickness is 1~3mm, thus reducing the volume, reducing the quality and improving the reliability.

(4) rich colors and beautiful appearance

The membrane switch can be personalized according to the design concept of the user, and the design of the color pattern is personalized, and the decorative effect reflects the comprehensive characteristics of material beauty, decorative beauty and craft beauty.