Abstract
This paper describes deterministic assembly processes for transforming conventional, planar devices based on flexible printed circuit board (FPCB) platforms into those with 3D architectures in a manner that is fully compatible with off-the-shelf packaged or unpackaged component parts. The strategy involves mechanically guided geometry transformation by out-of-plane buckling motions that follow from controlled forces imposed at precise locations across the FPCB substrate by a prestretched elastomer platform. The geometries and positions of cuts, slits, and openings defined into the FPCB provide additional design parameters to control the final 3D layouts. The mechanical tunability of the resulting 3D FPCB platforms, afforded by elastic deformations of the substrate, allows these electronic systems to operate in an adaptable manner, as demonstrated in simple examples of an optoelectronic sensor that offers adjustable detecting angle/area and a near-field communication antenna that can be tuned to accommodate changes in the electromagnetic properties of its surroundings. These approaches to 3D FPCB technologies create immediate opportunities for designs in multifunctional systems that leverage state-of-the-art components.
Original language | English (US) |
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Article number | 1803149 |
Journal | Advanced Functional Materials |
Volume | 28 |
Issue number | 48 |
DOIs | |
State | Published - Nov 28 2018 |
Funding
B.H.K., F.L., Y.Y., and H.J. contributed equally to this work. Z.X. acknowledges the support from National Natural Science Foundation of China (Grant No. 11402134). Y.H. acknowledges the support from NSF (Grant Nos. 1400169, 1534120, and 1635443). Y.Z. acknowledges support from the National Natural Science Foundation of China (Nos. 11672152 and 11722217) and the Thousand Young Talents Program of China and the Tsinghua National Laboratory for Information Science and Technology.
Keywords
- 3D electronic devices
- kirigami
- mechanical buckling
- near-field communication
- origami
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- General Chemistry
- Biomaterials
- General Materials Science
- Condensed Matter Physics
- Electrochemistry