The invention encompasses stacked semiconductor devices including gate stacks, wordlines, PROMs, conductive interconnecting lines, and methods for forming such structures. The respiratory mask and the facial respirator are adapted so that in the event of de-pressurization or the presence of toxic gases, the subject equips himself with the respiratory mask possibly after having previously removed the facial respirator. Also, the method can include measuring an input voltage of a network coordinator when the control unit is off. A jumbled-html document will contain all the segments, if broken into segments, but in a jumbled sequence. A switching output current is distributed to the primary winding of the isolating converter transformer and the inductance, and a current flowing to a switching device and a damper diode inserted in parallel with the switching device has a normal waveform regardless of the level of load current of the secondary-side direct-current output to ensure stable zero voltage switching operation.