Flexible printed circuit boards have become the backbone of modern compact electronics, enabling everything from wearable medical sensors and foldable smartphones to automotive camera modules and aerospace control systems. Unlike rigid boards, flexible circuits must survive repeated bending, twisting, and dynamic mechanical stress while maintaining signal integrity and electrical performance. This requires a different engineering mindset. A design that works on a standard FR4 board can fail quickly in a flex application if the bend radius, material stackup, and copper features are not treated as critical design parameters. By applying the right Flexible PCB Design Guidelines, design teams can reduce manufacturing delays, improve product lifespan, and unlock mechanical packaging options…