US Patent 10226619 Medical leads with segmented electrodes and methods of fabrication thereof

In one embodiment, a neurostimulation lead comprises: a lead body comprising a plurality of conductor wires; and a molded stimulation tip end comprising a plurality of segmented electrodes, hypotubes, and an annular frame structure: wherein (i) each segmented electrode of the plurality of segmented electrodes has an inner surface, an outer surface, and step-down region embedded within polymer material of the molded stimulation tip end, (ii) each respective hypotube is directly welded to the inner surface of a corresponding segmented electrode of the plurality of segmented electrodes.