Keywords

stiffness reduction, lamina emergent torsional joints, torsional joints, flexible printed, circuit board, compliant mechanisms, mechanical engineering

Abstract

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 and tested to verify the models.

Original Publication Citation

"DeFigueiredo, B.P., Zimmerman, T.K., Russell, B.D., Howell, L.L., “Regional Stiffness Reduction Using Lamina Emergent Torsional Joints for Flexible Printed Circuit Board Design,” Journal of Electronic Packaging, Vol. 140, 041001-1 to 041001-9, doi: 10.1115/1.4040552, 2018."

Document Type

Peer-Reviewed Article

Publication Date

2023-01-31

Permanent URL

https://asmedigitalcollection.asme.org/electronicpackaging/article/140/4/041001/367467/Regional-Stiffness-Reduction-Using-Lamina-Emergent

Publisher

ASME: Journal of Electronic Packaging

Language

English

College

Ira A. Fulton College of Engineering

Department

Mechanical Engineering

University Standing at Time of Publication

Full Professor

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