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Analyses of mechanically-assembled 3D spiral mesostructures with applications as tunable inductors

  • Fan Zhang
  • Fei Liu
  • YiHui ZhangEmail author
Article Special Topic: Flexible Electronics Manufacturing
  • 13 Downloads

Abstract

Mechanically-guided assembly allows the formation of 3D spiral-shaped inductors through controlled buckling, which could provide an increased quality (Q) factor and broadened working angle in near field communication, as compared to the planar design. An understanding of the microstructure-property relationship is essential in the design optimization of the assembly process. This work presents a theoretical model to analyze the deformations during the assembly of the 3D spiral-shaped mesostructure from a bilayer precursor that consists of a supporting ribbon and a 2D coil on its top. As validated by both the experiments and finite element analyses (FEA), this mechanics model allows accurate predictions of the assembled 3D configurations. In combination of electromagnetic simulations, we investigated the effects of various key design parameters on the final 3D configuration and the Q factor when operated as an inductor. The results suggest a significant role of the gravity effect on the assembled spiral configuration, especially for flexible coil designs with relative small cross-sectional areas or long wires. This study can serve as a reference for the design of spiral-shaped 3D inductors in different device applications.

Keywords

3D assembly modeling buckling multilayer tunable inductor 

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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Key Laboratory of Applied Mechanics of Ministry of Education, Department of Engineering MechanicsTsinghua UniversityBeijingChina
  2. 2.Center for Flexible Electronics Technology and Center for Mechanics and MaterialsTsinghua UniversityBeijingChina

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