PET Membrane Switch For Metal Dome Embossing 

WATERPROOF STRUCTURES There are two waterproof structures. The waterproof structure is generally designed as a back-shaped embedded structure. One structure is made of the same material and divided into two parts to make a finished product, and the circuit part is embedded in the panel part to form a product. This structure is more commonly used, and waterproof glue is used for each layer of glue; the other structure is to use materials with a thickness of upper and lower circuits and isolation layers and make the outer frame structure of the membrane switch with the panel, and the circuit part is embedded inside. into a whole. Membrane switch is an operating system that integrates key functions, indicating elements and instrument panels. It consists of four parts: panel, upper circuit, isolation layer and lower circuit. When the membrane switch is pressed, the contacts of the upper circuit are deformed downward, and are in contact with the pole plate of the lower…