How to protect flexible circuit boards

<p>Due to the flexibility of the <a href="https://www.atechpcb.com/pcb-manufacturing" target="_blank">FPC</a><a href="https://www.atechpcb.com/pcb-manufacturing" rel="noopener noreferrer" target="_blank"> <a href="https://www.atechpcb.com/pcb-manufacturing" target="_blank">flexible circuit board</a></a>, it is easy to break when under pressure, so some special methods are required for FPC protection.</p><p><br></p><p>&nbsp;</p><p>Common methods for Protecting Flexible Circuit Board</p><p><br></p><p>1. The minimum radius of the inner corner of the flexible profile is 1.6 mm. The larger the radius, the higher the reliability and the stronger the tear resistance. At the corners of the shape, a line near the edge of the board can be added to prevent the FPC from tearing.</p><p><br></p><p>2. The crack or groove on the <a href="https://www.atechpcb.com/pcb-manufacturing" rel="noopener noreferrer" target="_blank">FPC</a> must end with a circular hole with a diameter of not less than 1.5 mm. This is also necessary when two adjacent parts of the FPC need to be moved separately.</p><p><br></p><p>3. In order to obtain better flexibility, it is necessary to select the bending area in the uniform width area, and change the width of the FPC and the uneven wiring density in the bending area as much as possible.</p><p><br></p><p>4. Stiffeners, also called stiffeners, are mainly used to obtain external support. The materials used are PI, polyester, fiberglass, polymer materials, aluminum, steel, etc. The reasonable design of the position, area and material of the reinforcing plate has a great effect on avoiding FPC tearing.</p><p><br></p><p>5. In the design of multilayer flexible PCB, it is necessary to design the air gap layered in the area that is often bent during the use of the product. Try to use thin PI materials to improve the softness of the <a href="https://www.atechpcb.com/pcb-manufacturing" rel="noopener noreferrer" target="_blank">FPC </a>and prevent the FPC from cracking when repeatedly bent.</p><p><br></p><p>6. If space permits, a double-sided tape fixing area should be designed at the connection between the golden finger and the connector to prevent the golden finger and the connector from falling during the bending process.</p><p><br></p><p>7. The FPC positioning screen should be designed at the connection between the FPC and the connector to prevent the FPC from skewing during the flexible PCB assembly process.</p>