An expandable stent is implanted in a body lumen, such as a coronary artery, peripheral artery, or other body lumen for treating an area of vulnerable plaque. The invention further relates to the following method steps\u2014a card of deep-drawable material is placed between the upper and lower die and an elastic body is placed between the card and the lower die or between the card and the upper die. When the switch is off, the high voltage may thus be spread across multiple devices to prevent a voltage from the gate to the drain to exceed a threshold associated with gate-aided breakdown of the drain-to-substrate channel-side pn-junction.