In vitro testing of floating light activated micro-electrical stimulators

Document Type

Conference Proceeding

Publication Date

1-1-2009

Abstract

Chronic tissue response to microelectrode implants stands in the way as a major challenge to development of many neural prosthetic applications. The long term tissue response is mostly due to the movement of interconnects and the resulting mechanical stress between the electrode and the surrounding neural tissue. Remotely activated floating microstimulators are one possible method of eliminating the interconnects. As a method of energy transfer to the microstimulator, we proposed to use a laser beam at near infrared (NIR) wavelengths. FLAMES of various sizes were fabricated with integrated silicon PIN photodiodes. Sizes varied from 120 (Width) x 300 (Length) x 100 (Height) μm to 200 x 500 x 100μm. Devices were bench tested using 850nm excitation from a Ti:Sapphire laser. To test this method, the voltage field of the FLAMES was experimentally tested in saline solution pulsed with a NIR laser beam. The voltage generated is around 196mV in peak at the cathodic contact as a response to a single pulse. When a train of laser pulses was applied at 100Hz, the peak voltage at the cathodic contact remained around 141mV suggesting the feasibility of this approach for applications with pulse frequencies up to 100Hz. ©2009 IEEE.

Identifier

77950997666 (Scopus)

ISBN

[9781424432967]

Publication Title

Proceedings of the 31st Annual International Conference of the IEEE Engineering in Medicine and Biology Society Engineering the Future of Biomedicine Embc 2009

External Full Text Location

https://doi.org/10.1109/IEMBS.2009.5334073

PubMed ID

19964480

First Page

626

Last Page

629

Grant

R21NS050757

Fund Ref

National Institute of Neurological Disorders and Stroke

This document is currently not available here.

Share

COinS