| 摘要 |
PURPOSE:To obtain stably an electrostatic latent image with the close amount of information by providing a surface insulating layer, semiconductor layer which conducts by being excited by an electromagnetic wave, and conductor layer. CONSTITUTION:The polarity of uniform electrostatic charge in a primary process (a) is made negative when a photoconductor 2 is a P type semiconductor or negative when it is an N type semiconductor, and corona charge is performed. Then, corona charge with the polarity opposite to that of the primary charge is performed by a corona charger 5 in the 2nd process (b) and irradiation with an original image L1 is carried out at the same time; the photoconductive layer 2 conducts at light parts to charge the surface of the insulating layer 1 positively, and negative charges remain at dark parts. When an electrostatic holder 10 is irradiated with light L2 uniformly in the 3rd process (c), the photoconductive layer 2 conducts, so an electrostatic latent image corresponding to the original picture is formed on the insulating layer 1. The surface of the electrostatic latent image holder is discharged successively in the 4th process (d) by a roller 6 having the surface grounded to transfer the electrostatic image to between semiconductor layers. The transferred electrostatic image is scanned in the 5th process (e) by an electromagnetic wave L3 to discharge static charges, whose discharging current is read out as a signal. |
