Flexible and rigid-flex circuits are the building blocks of virtually various electronic products, as they required durable, reliable, lightweight 3D circuitry. Now, flex circuits are found in nearly every industry. They are used in devices those we use on a daily basis—from phones to computers. Wearable technologies almost always require flexible circuits: PCBs need to be durable, tiny, and conform to a myriad of shapes and movements. They are also used in everything from cars, trains, and airplanes to satellites, missiles and radios.
Flexible PCBs are lightweight, easy to install, durable, and compact. The wide range of motion makes it ideal for nearly all applications. Use flexible circuits in “bend to install” applications or dynamic applications, where the circuits are continuously in motion. Flexible circuits are also be benefit to the design packages where space is a primary concern.
What to keep in mind when designing your first flex PCB? We hope you find this flex PCB design guide useful. If you have any questions, BEST TECHNOLOGY have engineers and designers who would be more than happy to address any concerns.
Although squeeze-out only affects external layers, internal annular rings in rigid-flex circuit and multi-layer flex are often compromised, especially in places where tight hole to pad ratios are demanded.
The coverlay opening is used to expose the unsupported (no PTH) pads with diameter at least 0.25mm smaller than the diameter of PAD to ensure that the coverlay is over the pads and stop PAD peeling off from the substrate.