Fuji Electric Co., Ltd.

Yukihisa Tamura

Sumitaka Nogami

Koichi Aizawa

Toyoki Kazama

Hidetaka Yahagi

Yutaka Nakagishi

Masaaki Sakaguchi

Yukio Takano

An electrophotographic photoconductor and method for producing same, the electrophotographic photoconductor including an electroconductive substrate; and a photosensitive film laminated on said electroconductive substrate, wherein the electroconductive substrate comprises an aluminum substrate which has an anodic oxidation film on at least one surface thereof and which has been treated with a sealing agent mixture including an additive selected from the group consisting of a phosphate ester surfactant, a naphthalene sulfonate formaldehyde condensate, and a bisphenol A sulfonate formaldehyde condensate and a sealing agent.

Electrophotographic photoconductor and method for producing same

A laminate type organic electrophotographic photoconductor uses a thick undercoating layer as an intermediate layer for reducing the influence of a conductive substrate on a charge generation layer. An organosilicon coupling agent is bonded to the surfaces of small particles of titanium oxide, zirconium oxide, aluminum oxide or cerium oxide, at an Existence Ratio represented by the peak intensity ratio (Si2p/Me2p, Me=Ti, Zr or Al) or (Si2p/Ce3d) of from 0.15 to 0.6 of a bonding energy spectrum measured by X-ray photoelectron spectroscopy. The metal oxide small particles, the surfaces of which have been treated mechanochemically, are cleaned to reduce the ionic impurity concentration of the undercoating layer to below 1 ppm. The cleaned metal oxide small particles are dispersed into the polyamide copolymer binder resin for the undercoating layer. The undercoating layer produced in this manner results in a electrophotographic photoconductor whose electrical properties are constant despite environmental changes and repeated use. The electrophotographic photoconductor also resists residual potential rise after repeated use, and also resists image defect formation despite changes in environmental conditions and operating conditions.

Electrophotographic photoconductor and method of manufacturing same

An electrophotographic photoreceptor comprises in sequence:

Electrophotographic photoreceptor composition

In the photoreceptor described in the specification, an electroconductive base has an amorphous silicon type photoconductive layer coated over a blocking layer on the base and an amorphous carbon-containing surface layer, coated over a buffer layer on the photoconductive layer, has a hardness on the free surface side which is higher than the hardness on the buffer surface side. Apparatus for preparing the photoreceptor includes a CVD vacuum chamber and an arrangement for supplying selected layer-forming gases to the chamber in a controlled manner.

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Kawasaki, Japan

Yukihisa Tamura