Flexible PWB (Printed Wiring Board) is made from soft laminated plastic or other flexible insulating materials as the substrate. Parts made from it can be bent and stretched, allowing them to be flexed during use according to installation requirements. Flexible printed boards are typically used in special applications. For example, the display screens of some digital multimeters can rotate, and flexible printed boards are often used internally, such as in mobile phone displays, buttons, and other components.