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Flexible circuit electrode array for improved layer adhesion

  • US 8,200,338 B2
  • Filed: 01/13/2006
  • Issued: 06/12/2012
  • Est. Priority Date: 12/03/2004
  • Status: Active Grant
First Claim
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1. A flexible circuit electrode array adapted to be used with a visual prosthesis, comprising:

  • a) an insulating polymer layer comprising a top polymer portion and a bottom polymer portion;

    b) at least one trace containing a base conducting layer, an intermediate conducting layer and a top conducting layer, embedded in said insulating polymer layer between said top polymer portion and said bottom polymer portion; and

    c) at least one electrode connected to said at least one trace through a via in said top polymer portion of said insulating polymer layer, wherein said electrode includes a first electrode portion contacting said trace through said via and a second electrode portion overlapping said trace above said top polymer portion, and wherein a region of said top polymer portion is defined between said trace and said second electrode portion, wherein the first electrode portion is a central electrode portion contacting a corresponding central portion of the trace and the second electrode portion is a peripheral annular-shaped portion overlapping a corresponding peripheral annular-shaped of the trace above said top polymer portion.

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