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Regional Stiffness Reduction Using Lamina Emergent Torsional Joints For Flexible Printed Circuit Board Design, Bryce P. Defigueiredo, Brian Dale Russell, Trent K. Zimmerman, Larry L. Howell
Regional Stiffness Reduction Using Lamina Emergent Torsional Joints For Flexible Printed Circuit Board Design, Bryce P. Defigueiredo, Brian Dale Russell, Trent K. Zimmerman, Larry L. Howell
Faculty Publications
Flexible printed circuit boards (PCBs) make it possi- ble for engineers to design devices that use space efficiently
and can undergo changes in shape and configuration. How- ever, they also suffer from trade-offs due to non-ideal mate- rial properties. Here, a method is presented that allows en- gineers to introduce regions of flexibility in otherwise rigid
PCB substrates. This method employs geometric features to reduce local stiffness in the PCB, rather than reducing
the global stiffness by material selection. Analytical and fi- nite element models are presented to calculate the maximum
stresses caused by deflection. An example device is produced …