Membrane Keypad Structure

Adhesive layer: between the upper circuit layer and the lower circuit layer of the membrane switch, play the role of sealing and connecting, usually using the thickness of 0.05-0.2mm PET double-sided adhesive. Keypad panel selection of this layer of material, should fully consider the overall thickness of the product, insulation, circuit key bag feel and sealing. Back adhesive layer: The use of white adhesive is closely related to the film switch panel and a certain material (such as silicone rubber), usually using double-sided adhesive, 3M adhesive, waterproof adhesive and so on.