Membrane Switches have the advantages of overall flatness, thin body shape, low mass, good dust resistance, and excellent water resistance, and are semi-closed structures. In addition, there is a large degree of freedom in the choice of panel design and color. Its scope of application is expanding into desktop computers, copiers, fax machines, toys, square computers, word processors and other fields.
Membrane Switch production process is generally:
Electrode plate processing → making silk Screen plate → screen printing silver paste → drying → screen printing carbon paste → drying → stamping → screen printing plate → assembly.
The following is a brief introduction of membrane Switch materials and screen-printing processes. 
Substrate
There are several types of substrates that are suitable for making membrane switch panels:
(1) Polycarbonate film
Polycarbonate film has a wide range of operating temperatures (-135-135°C). When the temperature or humidity changes, the performance of this material does not change much. This ensures that the panel can withstand all kinds of harsh environments use.
(2) PVC film
Temperature performance is poor, especially in high temperature conditions, the softening temperature of 59 °C, the elasticity is not as good as polycarbonate film. However, it has a high elongation (130%) and because of its low price, it is suitable for use under normal conditions.
(3) polyester film
Both elasticity and temperature resistance are good, and the price is between the polycarbonate film and the polyvinyl chloride film. However, because the surface of the film is difficult to be processed into a matt type texture, it is mostly a transparent sheet, and at the same time, the surface of the polyester film can not obtain a satisfactory printing effect for most plastic inks, and a special special ink is generally used.
(4) Polyethylene film
Polyethylene film has good physical properties and chemical properties, and can resist a variety of chemicals, such as alcohols, aliphatic hydrocarbons, aromatic hydrocarbons, esters, ketones and alcohol ethers. However, the price of polyethylene film is higher.
