Parasitic Capacitance in High-Density Neural Electrode Arrays: Sources and Evaluation Methods.

ABSTRACT:

Objective

This study aims to identify sources of parasitic capacitance in high-density neural electrode arrays and to provide an approach for evaluating their associated capacitance values. We also represent the effect of parasitic capacitance on the electrochemical properties of electrodes.

Methods

Electrochemical impedance spectroscopy (EIS) and voltage transient (VT) measurements were employed to assess the parasitic capacitance of a 16-channel ultramicro-sized electrode array (UMEA) (8 × 25 µm² electrode sites). The effect of parasitic capacitance on cyclic voltammetry (CV), EIS, and VT measurements of 20-µm diameter electrodes was assessed by comparing two different array designs: narrow and wide trace arrays.

Results

The capacitive leakage currents an

SUBMITTER: Ghazavi A 

PROVIDER: S-EPMC11875893 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature