The seat switch which the membrane means "the membrane",applies pressure membrane printing technology.It calls the membrane switch.General, in the polyester film the electric conduction ink at the silk screenTo form the contact point pattern of 2 types by printing, (the upper contactpoint, the grounded contact seat),The insulator which at that time the hole opened (the spacer) to put and pastetogether, the upper contact pointDoing to push down, it calls the thing of the switch which it continues.