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Ultrasoft Pit-Free Electrodes for High-SNR Neural Recordings

  • Ruiyu Bai
  • , Xuanqi Wang
  • , Xiaoli You
  • , Yong Yang
  • , Yu Zhang
  • , Quetao Yu
  • , Chenfei Cao
  • , Feng Yue
  • , Minghao Wang
  • , Yunlei Zhou
  • , Honglong Chang
  • , Bowen Ji
  • Northwestern Polytechnical University Xian
  • Hainan University
  • Hangzhou Dianzi University
  • Xidian University

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper reports an ultrasoft pit-free electrode array, aiming to reduce the 'electrode-tissue' distance during neural signal recordings. The pit-free electrode was obtained by the reversed fabrication processes of encapsulation-metal-substrate, which is different from the traditional substrate-metal-encapsulation sequence. The exposed metal electrode sites are coplanar with the polyimide encapsulation layer after released from silicon wafer. Besides, the pit-free electrode array is designed with serpentine shape and covered by mixed silicone on the back, so the array can be stretchable and conformal better with tissue surface. It has been proved in rabbit that the pit-free electrode can reduce the contact resistance and increase the signal noise ratio (SNR) during neural signal recordings.

Original languageEnglish
Title of host publication2026 IEEE 39th International Conference on Micro Electro Mechanical Systems, MEMS 2026
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages502-505
Number of pages4
ISBN (Electronic)9798331572518
DOIs
StatePublished - 2026
Event39th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2026 - Salzburg, Austria
Duration: 25 Jan 202629 Jan 2026

Publication series

NameProceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
ISSN (Print)1084-6999

Conference

Conference39th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2026
Country/TerritoryAustria
CitySalzburg
Period25/01/2629/01/26

Keywords

  • Coplane
  • High SNR
  • Neural recordings
  • Pit-free electrodes
  • Ultrasoft substrate

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