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In-Plane Deformation Mechanics for Highly Stretchable Electronics.

Yewang Su1,2,3,4, Xuecheng Ping5, Ki Jun Yu6

  • 1State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China.

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Summary
This summary is machine-generated.

Scissoring in thick bars prevents buckling in serpentine traces. This technique significantly enhances the elastic stretchability of thick copper traces, improving performance by over 350%.

Keywords:
buckling mechanicsnon-bucklingscissoringstretchable electronics

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Solid Mechanics

Background:

  • Serpentine traces are used in flexible electronics for stretchability.
  • Buckling is a common failure mode in thin, serpentine structures.
  • Thick traces often exhibit different mechanical behaviors compared to thin ones.

Purpose of the Study:

  • To investigate the effect of scissoring on the mechanical behavior of thick serpentine traces.
  • To determine if scissoring can suppress buckling in thick traces.
  • To quantify the achievable elastic stretchability using this method.

Main Methods:

  • Systematic analytical modeling of thick serpentine traces.
  • Experimental fabrication and testing of thick copper serpentine traces.
  • Comparative analysis of scissoring versus non-scissoring geometries.

Main Results:

  • Scissoring effectively suppresses buckling behavior in thick serpentine traces (thickness > width).
  • Thick copper traces utilizing scissoring achieve elastic stretchability up to approximately 350%.
  • This represents a sixfold improvement compared to thin geometries (≈60% stretchability).

Conclusions:

  • Scissoring is a viable strategy to enhance the stretchability of thick serpentine traces.
  • The findings enable the design of more robust and stretchable flexible electronic components.
  • This research opens avenues for advanced applications requiring high elastic deformation in interconnects.