Hitachi, Ltd.

Hitachi Chemical Company, Ltd.

Chiaki Yamabishi

Yutaka Ito

Masatoshi Wakagi

Takayuki Nakakawaji

Masanobu Hanazono

Kunihiro Tamahashi

Shigeki Komatsuzaki

Mitsuyoshi Shoji

Fuminori Ishikawa

Shigeharu Onuma

An electrophotographic photosensitive element, e.g. for a photocopier or laser printer, comprises a substrate and a plurality of layers on the substrate including a photoconductive layer of a-Si:H and a protective and lubricating layer which is outermost from said substrate. To provide wear resistance and long life-time of the protective and lubricating layer, this layer comprises a microporous solid material having a pore structure which extends substantially over the whole thickness of the material and a hydrophobic lubricant carried by said solid material. The lubricant includes a liquid film and often times a non-particulate solid film, and provides at least part of the outer surface of the element and is present also in the pores of said microporous solid material.

Electrophotographic photosensitive element comprising a protective layer

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Hitachi, Japan

Chiaki Yamabishi