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Related Experiment Video

Updated: May 14, 2026

Insertion of Flexible Neural Probes Using Rigid Stiffeners Attached with Biodissolvable Adhesive
06:40

Insertion of Flexible Neural Probes Using Rigid Stiffeners Attached with Biodissolvable Adhesive

Published on: September 27, 2013

Improved polyimide thin-film electrodes for neural implants.

Juan S Ordonez1, Christian Boehler, Martin Schuettler

  • 1Laboratory for Biomedical Microtechnology, Dept. of Microsystems Engineering - IMTEK, Univ. of Freiburg, Germany. ordonez@imtek.de

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|February 1, 2013
PubMed
Summary
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Polyimide-Based Neural Interfaces: From Implantation to Microscopy: Stability Across Fixation and Storage Conditions.

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Establishment of High Channel-Count Packaging in Active Implantable Medical Devices for Neuroprosthesis.

Journal of biomedical materials research. Part B, Applied biomaterials·2026

Researchers improved neural implant electrode arrays by enhancing adhesion between metal and polymer layers using silicon carbide (SiC) and diamond-like carbon (DLC). This innovation prevents device failure and ensures long-term stability for retinal stimulation applications.

Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Neuroscience

Background:

  • Thin-film electrode arrays are crucial for high-density neural implants.
  • Delamination of metallic layers from polymer substrates causes device failure.

Purpose of the Study:

  • To improve the adhesion of thin-film electrode arrays for neural implants.
  • To fabricate a high-channel-count electrode array for retinal stimulation with enhanced durability.

Main Methods:

  • Investigated adhesion between polyimide, silicon carbide (SiC), and diamond-like carbon (DLC).
  • Integrated SiC and DLC layers into polyimide-platinum (Pt) array fabrication.
  • Conducted inter-diffusion studies of Pt and SiC to optimize gold core thickness.
  • Performed long-term electrochemical pulse testing on iridium oxide (IrOx) coated contacts.

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Last Updated: May 14, 2026

Insertion of Flexible Neural Probes Using Rigid Stiffeners Attached with Biodissolvable Adhesive
06:40

Insertion of Flexible Neural Probes Using Rigid Stiffeners Attached with Biodissolvable Adhesive

Published on: September 27, 2013

Chronic Implantation of Multiple Flexible Polymer Electrode Arrays
08:54

Chronic Implantation of Multiple Flexible Polymer Electrode Arrays

Published on: October 4, 2019

Fabrication of Ti3C2 MXene Microelectrode Arrays for In Vivo Neural Recording
09:58

Fabrication of Ti3C2 MXene Microelectrode Arrays for In Vivo Neural Recording

Published on: February 12, 2020

Main Results:

  • Successfully fabricated a 232-channel retinal stimulation electrode array with significantly improved adhesion.
  • Coated metal wires adhered to the polyimide substrate after 1 year of accelerated aging in saline.
  • Optimized Pt/Au tracks demonstrated reduced electrical resistance.
  • IrOx stimulating contacts showed no deterioration after millions of pulses.

Conclusions:

  • SiC and DLC coatings effectively enhance the adhesion and long-term stability of thin-film electrode arrays.
  • The developed fabrication method provides a robust solution for neural implant electrode arrays.
  • The improved electrode arrays are suitable for demanding applications like retinal stimulation.