Paper-like Foldable Nanowave Circuit with Ultralarge Curvature and Ultrahigh Stability

Area of Science:

• Materials Science
• Electrical Engineering
• Nanotechnology

Background:

• Flexible electronic circuits require highly foldable conducting interconnects.
• Existing interconnects (serpentine, wavy, nanowire) face challenges with mechanical instability or fabrication complexity.
• Traditional thin-film interconnects lack sufficient deformation tolerance for flexible applications.

Purpose of the Study:

• To introduce a novel nanowave structure metal interconnect system.
• To achieve highly foldable and large-scale manufacturable flexible interconnects.
• To demonstrate stable electrical performance under mechanical deformation.

Main Methods:

• Fabrication of nanowave structure metal interconnects.
• Characterization of electrical performance under various bending radii (down to 0.2 mm).
• Integration of interconnects into a paper-like wireless accelerometer for testing under extreme strain.

Main Results:

• Nanowave interconnects exhibit stable and prominent electrical performance with <10% resistance variation at a 0.2 mm bending radius.
• Successful fabrication and characterization of a flexible wireless accelerometer utilizing the developed interconnects.
• Demonstrated feasibility for large-scale manufacturing of foldable interconnects.

Conclusions:

• The developed nanowave interconnects offer a viable solution for highly foldable and stable flexible circuits.
• This technology paves the way for next-generation foldable electronic equipment, including wearable and biomedical devices.
• The approach provides a framework for designing and assembling advanced flexible electronic systems.