Implantable medical device having a conformal coating
A method for manufacturing an implantable electrical medical device includes forming a conductive substrate, placing the conductive substrate in a deposition chamber; and forming a conformal coating over the conductive substrate using atomic layer deposition. In various embodiments, the conformal coating is a conductive coating and in other embodiments the conformal coating is a dielectric coating.
1. An implantable medical electrical device, comprising:
a conductive substrate;
a first conformal conductive coating formed over at least a portion of the substrate, the conductive coating comprising a plurality of atomic monolayers and a low polarization coating applied over the conformal coating;
an electrical contact; and
an electronics module adapted to be electrically coupled to the substrate via the electrical contact.
2. The device of claim 1 , wherein the conformal coating is more chemically stable than the substrate.
3. The device of claim 1 wherein the substrate is an electrode base and further comprising:
an elongated insulative lead body, wherein the electrode base is disposed along the lead body, and
a conductor coupled to the electrode base and extending through the elongated lead body, the conductor being adapted to be electrically coupled to the electrical contact.
4. The device of claim 1 wherein the electrical contact is further electrically coupled to an electrode used for one of sensing electrical body signals and delivering electrical stimulation pulses.
5. The device of claim 4 further comprising a second conformal coating being a conductive coating formed over a second portion of the substrate.
6. The device of claim 1 wherein the substrate comprises one of tungsten, a tungsten alloy, stainless steel, and a stainless steel alloy.