| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor having an a-SiC upper charge injection inhibition layer and an a-SiC surface layer, the photoreceptor being superior in adhesiveness, suppressing surface deterioration, being superior in sensitivity characteristics and charging characteristics, and capable of maintaining a favorable image formation for a long period of time. <P>SOLUTION: In the electrophotographic photoreceptor, the upper charge injection inhibition layer contains 10 atomic ppm or more and 30,000 atomic ppm or less of the Group 13 atoms or the Group 15 atoms in the periodical table with respect to silicon atoms in the upper charge injection inhibition layer; the ratio (C/(Si+C)) of the number of carbon atoms with respect to the sum of the number of silicon atoms and the number of the carbon atoms in the upper charge injection inhibition layer is 0.10 or more and 0.60 or less; and the sum of the atomic density of the silicon atoms and the atomic density of the carbon atoms in the surface layer is 6.60×10<SP>22</SP>atoms/cm<SP>3</SP>or more; and the ratio (C/(Si+C)) of the number of carbon atoms with respect to the sum of the number of silicon atoms and the number of the carbon atoms in the surface layer is 0.61 or more and 0.75 or less. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
