Patent ID: 8380326

Claim:
A method of forming an insulated flexible electrical circuit suitable for implantation, comprising the steps of: choosing a rigid substrate; cleaning said rigid substrate; depositing a first polyparaxylylene layer on said rigid substrate; selecting a biocompatible metal or metal combination to comprise an electrical conductor; depositing said selected metal or metal combination forming an electrical conductor on said first polyparaxylylene layer; patterning said electrical conductor to form a conductive path thereon; depositing a second polyparaxylylene layer; thermally treating said first polyparaxylylene layer and said second polyparaxylylene layer; defining at least one select portion of said second polyparaxylylene layer; removing said at least one select portion of said second polyparaxylylene layer defining at least one aperture therein, thereby forming at least one electrode that is suitable for contacting living tissue; and removing said rigid substrate wherein said implantable insulated flexible electrical circuit comprising polyparaxylylene and metal structure results.