A tray 1 can be inserted in and pulled out of a main body 10 of an image forming apparatus. In a first etching step, at least the sacrificial oxide and nitride layers are etched to define opposing substantially vertical surfaces of at least the sacrificial oxide and nitride layers. Moreover, each vehicle is provided with a dynamic current collector and guide assembly comprising a guide flange which keeps the vehicle on the track. The position of the segment to be used is determined such that when the erasure continues over units of processing, the position sequentially varies gradually for each processing units. The example receiver may include an analog-to-digital converter for performing an over-sampling operation on a received signal to generate output data, the over-sampling operation based on a sampling frequency and an over-sampling coefficient and a fast fourier transform calculating unit for performing a FFT on the output data of the ADC converter. After the exterior film is adhered, the cut portion is removed along with removal of a sub adhesive protection film.