The present invention is directed to an assembled syringe for administering powder medicament in the field of medicine. The at least one barrel nut can be adapted to mount to a portion of a barrel associated with a firearm. Path means is defined in the seal segment. Using the applied word-line and bit-line voltages, data is stored in the memory cells in the selected word line and the additional memory cells are simultaneously programmed. In impurity regions, a concentration distribution of an impurity element imparting one conductivity type is made to have a concentration gradient, the concentration is made low at a side of a channel formation region, and the concentration is made high at the side of an end portion of a semiconductor layer.