Patent ID: 8778532

Claim:
A lithium electrochemical device comprising a stack of layers suitable for constituting a micro-battery deposited on a substrate and encapsulated using a protective cap sealed onto said substrate, the device comprising: said substrate comprising two current collector strips constituted of an electrically conductive material and at least one insulating strip constituted of an insulating material that does not react with lithium; and said protective cap comprising an inner surface that comprises two current collector strips constituted of the electrically conductive material and at least one insulating strip constituted of the insulating material, wherein the current collector strips and the at least one insulating strip on said cap are positioned to respectively coincide with the current collector strips and the at least one insulating strip on the substrate, so that when the cap is sealed onto the substrate, the respective strips deposited on the cap and on the substrate come into contact with each other providing the actual seal of the cap on the substrate, and wherein the respective strips deposited on the cap and on the substrate are arranged to form a spiral surrounding said micro-battery.