To enhance electromigration resistance of an electrode. The substrate is held at a different potential than the sourcedrain to insure that the greatest difference in voltage during the programming step occurs between the channel region and the gate, rather than the gate and the sourcedrain. Optionally, pillows may be formed in the balloon to prevent longitudinal movement of the stent with respect to the balloon during intravascular delivery. The rods of the reinforcement are connected to each other and are distributed throughout the volume between the pressure side surface and the suction side surface of the blade.