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Biomedical Microdevices

, 17:7 | Cite as

Wafer-scale integrated micro-supercapacitors on an ultrathin and highly flexible biomedical platform

  • Jimin Maeng
  • Chuizhou Meng
  • Pedro P. Irazoqui
Article

Abstract

We present wafer-scale integrated micro-supercapacitors on an ultrathin and highly flexible parylene platform, as progress toward sustainably powering biomedical microsystems suitable for implantable and wearable applications. All-solid-state, low-profile (<30 μm), and high-density (up to ~500 μF/mm2) micro-supercapacitors are formed on an ultrathin (~20 μm) freestanding parylene film by a wafer-scale parylene packaging process in combination with a polyaniline (PANI) nanowire growth technique assisted by surface plasma treatment. These micro-supercapacitors are highly flexible and shown to be resilient toward flexural stress. Further, direct integration of micro-supercapacitors into a radio frequency (RF) rectifying circuit is achieved on a single parylene platform, yielding a complete RF energy harvesting microsystem. The system discharging rate is shown to improve by ~17 times in the presence of the integrated micro-supercapacitors. This result suggests that the integrated micro-supercapacitor technology described herein is a promising strategy for sustainably powering biomedical microsystems dedicated to implantable and wearable applications.

Keywords

Energy storage Flexible Implantable devices Micro-supercapacitors Wafer-scale integration 

Notes

Acknowledgments

This work was sponsored by the Defense Advanced Research Projects Agency (DARPA) MTO under the auspices of Dr. Jack Judy through the Space and Naval Warfare Systems Center, Pacific Grant/Contract No. N66001-11-1-4029. The authors thank Rebecca A. Bercich for proofreading the manuscript.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Jimin Maeng
    • 1
  • Chuizhou Meng
    • 1
  • Pedro P. Irazoqui
    • 1
  1. 1.Center for Implantable Devices, Weldon School of Biomedical EngineeringPurdue UniversityWest LafayetteUSA

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