An active layer of an NTFT includes a channel forming region, at least a first impurity region, at least a second impurity region and at least a third impurity region therein. The process uses high-velocity air within an elutriation assembly to efficiently remove ferrous and non-ferrous metal debris from recyclable polymer fibers. Elasticity of an opening spring and a rubber body, which are arranged between the striker and a coupling section, allows a forced rotational displacement of the striker in both forward and reverse directions from a state in which the striker is held at the rotated and raised position. The card printer has a user ID input part for inputting an ID of the user. The switching isolation unit causes an unselected output terminal of the first and second output terminals to be electrically isolated from the common input terminal when the serial switching unit operates. First, the encoded data signal is decoded to generate a decoded clock signal.