Patent ID: 8126530

Claim:
An electrode comprising: a non-conductive substrate having a top surface and at least one channel extending therethrough; an electrically conductive trace material positioned adjacent at least a portion of the top surface of the non-conductive substrate and extending through said channel, and being adapted to be electrically coupled to a power source; a second electrically conductive material that is inert or more corrosion resistant than the trace material, the second electrically conductive material being positioned adjacent to and entirely covering a top surface of the trace material, a third electrically conductive material that is inert or more corrosion resistant than the trace material, the third electrically conductive material being positioned adjacent to and entirely covering a top surface of the second electrically conductive material, and covering a portion of the top surface of the non-conductive substrate that surrounds the second electrically conductive material; and a conductive hydrogel positioned adjacent to a portion of a top surface of the third electrically conductive trace material, wherein the conductive hydrogel is laterally offset from the trace material.