Provided is a method of fabricating a semiconductor device. The electromagnetic shielding sheet has a conductive structure having lines having straight parts of widths in the range of C, where C is a predetermined value. Therefore, even if the adhered fuel vaporizes when the engine is restarted, the air-fuel ratio will not become excessively rich as a result. Additionally, the adaptive temperature controller determines the responsiveness of the electrically-conductive material to determine the predicted increase in temperature and rate of increase in temperature relative to increases in voltage, current or power. The sealing head is air cooled within the induction sealing unit.