Material of membrane switch

The structure of the membrane switch is divided into five structural layers: graphic overlay layer, graphic overlay adhesive layer, upper circuit, circuit isolation layer, lower circuit and back adhesive layer. The graphic overlay layer is generally made of high-toughness PET or PC transparent and colorless raw materials with a thickness of less than 0.25mm, and is composed of printed patterns and texts. Strong double-sided adhesive glue, superimposing the graphics and the upper circuit closely; the upper circuit and the lower circuit are both made of 0.125mm thick (0.075 and 0.1mm thick) polyester film (PET) with excellent toughness, silk screen conductive Silver and conductive carbon, drying to make it conductive. For the circuit lead wiring spacing less than 1mm, the gold finger connecting the socket is easy to pierce the silver and cause the circuit to be bad. It is recommended that the circuit spacing of 0.5-1mm be used with strong wear resistance FPC circuit, eliminate bad circuit. The circuit isolation layer plays the role of insulation and bonding between the upper circuit and the lower circuit generally, double-sided adhesive with a thickness of 0.125--0.25mm and a PET substrate is used, Strong double-sided adhesive that sticks closely ,back adhesive layer JCF technology usually choose 3M adhesive.

Membrane switch panel is a whole, all material selection should take into account the overall sealing, waterproof, insulation and anti-aging properties, membrane switch keypad for outdoor, but also take into account the waterproof and dustproof function, the change of temperature difference between winter and summer and the strong sunlight UV function.

For the overall design of the membrane keyboard switch, the engineering designer should take into account the scientific and technological nature of the membrane key, so that the quality of the produced product is stable and reliable, and the production cost of the product is reduced as much as possible.

More information membrane keypads:www.jcftechnology.com