Patent ID: 7877866

Claim:
A method for manufacturing a flexible circuit electrode array adapted to electrically communicate with organic tissue, comprising: a) providing a flexible insulator polymer base layer; b) curing said insulator polymer base layer; c) depositing a metal trace layer containing a base metal coating layer, a metal conducting layer and a metal top coating layer on a surface of said cured insulator polymer base layer; d) patterning said metal trace layer by photolithography and forming metal traces on said insulator polymer base layer; e) deimidizing said surface of said insulator polymer base layer to improve adhesion of an insulator polymer top layer; f) depositing said insulator polymer top layer; g) curing said insulator polymer top layer thereby forming one single insulating polymer combined layer with said base insulator polymer base layer and said insulator polymer top layer; and h) patterning said insulator top polymer layer by photolithography to obtain at least one via adapted to electrically communicate with organic tissue.