Low Impedance Electrode Coatings
Coatings are available for planar multielectrode arrays, single-shaft wire electrodes, multisite cortical penetrating microelectrodes, and for cortical surface and many peripheral nerve and spinal cord electrodes. For data on electrode properties see Electrode Properties and individual data sheets.
Sputtered Iridium Oxide (SIROF)
SIROF is a high charge-injection capacity, low impedance coating particularly suited to planar electrode arrays and patterning by photolithography. SIROF is more physically robust and tolerates higher temperatures than other iridium oxide coatings.
Activated Iridium (AIROF)
AIROF is formed by electrochemically activating iridium oxide to provide an electrode with high charge-injection capacity and low impedance. Activation of iridium wire and iridium thin films is possible.
Electrodeposited iridium oxide (EIROF)
EIROF has similar properties to AIROF. It is useful for coating electrodes already fabricated into leads or electrode structures not suitable for vacuum processing.
Titanium Nitride (TiN)
Reactively sputtered TiN films have a high surface roughness that provides high levels of capacitive charge injection and low impedance. TiN is used extensively in cardiac pacing.
Platinum
Platinum and platinum-iridium alloys are well-established electrode materials with an extensive history in neural prostheses and cardiac pacing.
Iridium
Iridium metal coatings are vacuum deposited and patterned by photolithography. The iridium is usually activated to AIROF for neural electrode applications, but can also be used in the metallic form for stimulation and rtecording with properties similar to platinum.
Contact us to discuss Low Impedance Electrode Coatings at EIC Biomedical.
Limitations: The use of test results and test articles for any application is the sole responsibility of the end-user. Results of in vitro testing do not establish in vivo safety. The performance of electrodes and electrode devices and the robustness of encapsulation may depend on the manner of use, post-fabrication history, and other factors that are not predictable.