A gate insulating film is formed on a semiconductor substrate, and a gate electrode is formed by deposition of semiconductor material on the gate insulating film. The hydraulic force application member may provide a first stage of the adjustment to the spacer, and the force transmission member may be threadingly rotated to apply a second stage of the adjustment to the spacer. The anti-microbial synthetic fibers comprise inorganic anti-microbial additives, distributed in certain areas to reduce the amount of the anti-microbial agents being used, and therefore the cost of such fibers. A first signal charge is produced during the first signal charging period and a second signal charge is produced during the second signal charging period.