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Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus

  • US 6,815,135 B2
  • Filed: 12/18/2002
  • Issued: 11/09/2004
  • Est. Priority Date: 12/21/2001
  • Status: Expired due to Term
First Claim
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1. An electrophotographic photosensitive member comprising a conductive support, and provided thereon a charge generation layer, a charge transport layer and a protective layer in this order, wherein;

  • the layer thickness a0

    m) of said charge transport layer at the middle portion of said conductive support in its generatrix direction, the layer thickness b0

    m) of said protective layer at the middle portion of said conductive support in its generatrix direction, the layer thickness a (μ

    m) of said charge transport layer at a portion other than the middle portion and the layer thickness b (μ

    m) of said protective layer at the portion other than the middle portion satisfy the following expression (1) in a region satisfying 0.8 (μ

    m)≦

    (a0

    a)≦

    3.0 (μ

    m);

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