| 摘要 |
<p>An electrophotographic image forming apparatus comprises an amorphous silicon photosensitive drum showing a rotation starting torque held lower than a predetermined value (e.g., 0.39 N·m) in order to make the produced images free from unevenness and no molten developer would adhere to the photosensitive drum after long use so that the drum can be prevented from being scraped. The surface of the amorphous silicon photosensitive drum 1 is electrically uniformly charged and a laser beam LB is emitted from image exposure unit 3 to irradiate the surface of the photosensitive drum 1 and draw an electrostatic latent image there, which electrostatic latent image is then developed by developing unit 5, using toner. The image developed by toner is then transferred onto a receiving material 11 by transfer charger 6. A plurality of line grooves are formed on the outer peripheral surface of the drum-shaped aluminum base member of the amorphous silicon photosensitive drum 1 in parallel with each other around the circumference and an amorphous silicon photosensitive layer is formed on the surface thereof. The surface roughness is defined by Ra = 0.08 to 0.12 µm.</p> |
