DESIGN TIP: Minimum Bend Radius for Flex Circuits

Even though flex circuits are very pliable and flexible, there are limits to their flexibility. If the bend radius is too tight, the result can be delamination and conductor fracture.

Minimum Bend Radius for Flex Circuits

Even though flex circuits are very pliable and flexible, there are limits to their flexibility.

Single and Double-sided Flexible PWBs

For single and double-sided flexible printed wiring boards (PWBs), the minimum bend radius should be six times the overall thickness.

If the overall thickness of the flex circuit is .012”, the minimum bend radius should be .072”

Multilayered Flexible PWBs

For multilayer flexible printed wiring board and multilayer rigid and flexible printed wiring board, (bonded inner layers), the minimum bend radius should be 12 times the overall thickness.

If the overall thickness of the flex circuit is .030”, the minimum bend radius should be .360”.

For more information on DuPont™ Pyralux® Flexible Circuit Materials, please contact us or visit our website for additional regional contacts.