A Polymer Cochlear Electrode Array: Atraumatic Deep Insertion, Tripolar Stimulation, and Long-Term Reliability...

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Tae Mok Gwon

A Polymer Cochlear Electrode Array

Atraumatic Deep Insertion, Tripolar Stimulation, and Long-Term Reliability

Tae Mok Gwon

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English

Springer Verlag, Singapore
04 June 2018

Biomedical engineering; Polymer chemistry; Materials science; Circuits & components; Electronic devices & materials

Series: Springer Theses

This book describes the design, fabrication and evaluation of a polymer-based neural interface for a cochlear electrode array, reviewed in terms of fabrication process, functionality, and reliability. Polymer-based devices have attracted attention in the neural prosthetic field due to their flexibility and compatibility with micro-fabrication process. A liquid crystal polymer (LCP) is an inert, highly water-resistant polymer suitable for the encapsulation of electronic components and as a substrate material for fabricating neural interfaces. The author has designed, fabricated, and evaluated an LCP-based cochlear electrode array for an improved polymer-based cochlear implant. The thesis deals with 3 key topics: atraumatic deep insertion, tripolar stimulation, and long-term reliability. Atraumatic insertion of the intracochlear electrode and resulting preservation of residual hearing have become essential in state–of-the-art cochlear implantation. A novel tapered design of anLCP-based cochlear electrode array is presented to meet such goals. For high-density and pitch-recognizable cochlear implant, channel interaction should be avoided. Local tripolar stimulation using multi-layered electrode sites are shown to achieve highly focused electrical stimulation. This thesis addresses another vital issue in the polymer-based neural implants: the long-term reliability issue. After suggesting a new method of forming mechanical interlocking to improve polymer-metal adhesion, the author performs accelerating aging tests to verify the method’s efficacy. The aforementioned three topics have been thoroughly examined through various in vitro and in vivo studies. Verification foresees the development of LCP-based cochlear electrode array for an atraumatic deep insertion, advanced stimulation, and long-term clinical implant.

By: Tae Mok Gwon
Imprint: Springer Verlag, Singapore
Country of Publication: Singapore
Edition: 2018 ed.
Dimensions: Height: 235mm, Width: 155mm,
Weight: 1.788kg
ISBN: 9789811304712
ISBN 10: 9811304718
Series: Springer Theses
Pages: 88
Publication Date: 04 June 2018
Audience: College/higher education , Further / Higher Education
Format: Hardback
Publisher's Status: Active

Dr. Tae Mok Gwon was a member of the NanoBio-electronics & Systems Laboratory, Department of Electrical and Computer Engineering, Seoul National University, Korea. He is currently a Senior engineer at Semiconductor R&D center, Samsung Electronics Co., Ltd..