A high speed transmit driver is provided, along with methods to improve driver slew rate, decrease transmit jitter, improve termination accuracy, and decrease sensitivity to supply noise. This problem has been overcome by using IrMn for the pinning layer at a thickness of about 20 Angstroms or less. This fluid layer may be maintained by immersing the component in liquid or by using a captive couplant column between the probe and the component surface. Thus, the impurity concentration estimation means accurately estimates the impurity concentration in the hydrogen system of the fuel cell. The width from the position where the first element isolating region contacts the first gate insulating film to the top surface end of the first element isolating region is equal to the width from the position where the second element isolating region contacts the second gate insulating film to the top surface end of the second element isolating region.