Abstract
The proposed cochlear electrode array has a low width while maintaining variable stiffness owing to peripheral blind vias and a tapered structure. Figure 4.1 shows a comparison between the current design and the previous LCP cochlear electrode array, which had a uniform thickness throughout. If a 20-µm line pitch, 0.3-mm-wide electrode site, 16-channel electrode array, with a 0.1-mm laser machining error is assumed, the width of the previous design is 0.5–1.02 mm from the tip to the base, and the width of the proposed design is 0.3–0.36 mm from the tip to the base. The tip and base of the current electrode array can be reduced to 60 and 40% of those of the previous design, respectively (Fig. 4.2). This reduced width and more flexible tip decrease the insertion and extraction forces.
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Gwon, T.M. (2018). Discussion. In: A Polymer Cochlear Electrode Array: Atraumatic Deep Insertion, Tripolar Stimulation, and Long-Term Reliability. Springer Theses. Springer, Singapore. https://doi.org/10.1007/978-981-13-0472-9_4
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