The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 2006
Filed:
Aug. 08, 2003
Kazuto Hosoi, Shizuoka, JP;
Hideaki Matsuoka, Shizuoka, JP;
Satoshi Kojima, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In an electrophotographic photosensitive member comprising a conductive substrate, and provided thereon a photoconductive layer containing at least an amorphous material composed chiefly of silicon atoms and, deposited on the photoconductive layer, a layer region containing an amorphous material composed chiefly of silicon atoms, which layer region contains at least partly a periodic-table Group 13 element, the content of the periodic-table Group 13 element based on the total amount of constituent atoms in the layer region deposited on the photoconductive layer has distribution having at least any two of maximum value(s) and maximum region(s) in the thickness direction of the layer region. This electrophotographic photosensitive member can be improved in charging performance, can prevent image defects due to pressure mars and can form high-quality images over a long period of time.