The main difference between rigid PCBs and flexible PCBs lies in their construction and flexibility. Here are the key distinctions:

1.Construction: Rigid PCBs are made from rigid materials, such as fiberglass-reinforced epoxy laminates or rigid laminates, which provide structural support and stability to the board. On the other hand, flexible PCBs are made from flexible materials, such as polyimide (PI) or polyester (PET), which allow the board to bend and conform to different shapes.

2.Flexibility: Rigid PCBs are not designed to be flexible or bendable. They maintain their shape and do not easily bend or twist. In contrast, flexible PCBs are highly flexible and can be bent, folded, or twisted to fit into tight spaces or conform to specific shapes and contours.

3.Applications: Rigid PCBs are commonly used in electronic devices where a sturdy and stable board is required, such as computers, televisions, industrial equipment, and automotive applications. Flexible PCBs are employed in applications that demand flexibility, such as wearable devices, medical devices, aerospace systems, and products with curved or irregular form factors.

4.Complexity: Rigid PCBs are suitable for complex circuit designs due to their ability to accommodate multiple layers and high component densities. Flexible PCBs can also support complex circuitry but are often used in applications that require space-saving designs or the ability to route circuits in three dimensions.

5.Cost: In general, rigid PCBs tend to be more cost-effective compared to flexible PCBs. The materials used in rigid PCBs are typically less expensive, and the manufacturing processes are well-established. Flexible PCBs, with their specialized materials and fabrication techniques, can be more expensive.

It's worth mentioning that there are also rigid-flex PCBs, which combine rigid and flexible sections within a single board. Rigid-flex PCBs offer the advantages of both types, allowing for complex designs with some level of flexibility in specific areas.

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