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Method for Estimating the Charge Density Distribution on a Dielectric Surface

Published online by Cambridge University Press:  12 April 2017

Takuya Nakashima ,
Hiroyuki Suhara ,
Hidekazu Murata  and
Hiroshi Shimoyama
Takuya Nakashima
Affiliation:
Faculty of Science and Technology, Meijo University, Tempaku-ku, Nagoya 468-8502, Japan
Hiroyuki Suhara
Affiliation:
RICOH Co., Ltd., 810, Shimo-imaizumi, Ebina-shi, Kanagawa 243-0460, Japan
Hidekazu Murata*
Affiliation:
Faculty of Science and Technology, Meijo University, Tempaku-ku, Nagoya 468-8502, Japan
Hiroshi Shimoyama
Affiliation:
Faculty of Science and Technology, Meijo University, Tempaku-ku, Nagoya 468-8502, Japan
*
*Corresponding author. hkmurata@meijo-u.ac.jp
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Abstract

High-quality color output from digital photocopiers and laser printers is in strong demand, motivating attempts to achieve fine dot reproducibility and stability. The resolution of a digital photocopier depends on the charge density distribution on the organic photoconductor surface; however, directly measuring the charge density distribution is impossible. In this study, we propose a new electron optical instrument that can rapidly measure the electrostatic latent image on an organic photoconductor surface, which is a dielectric surface, as well as a novel method to quantitatively estimate the charge density distribution on a dielectric surface by combining experimental data obtained from the apparatus via a computer simulation. In the computer simulation, an improved three-dimensional boundary charge density method (BCM) is used for electric field analysis in the vicinity of the dielectric material with a charge density distribution. This method enables us to estimate the profile and quantity of the charge density distribution on a dielectric surface with a resolution of the order of microns. Furthermore, the surface potential on the dielectric surface can be immediately calculated using the obtained charge density. This method enables the relation between the charge pattern on the organic photoconductor surface and toner particle behavior to be studied; an understanding regarding the same may lead to the development of a new generation of higher resolution photocopiers.

Keywords

Electrostatic latent imageboundary charge methodscanning electron microscopycharge density distributionorganic photoconductor
Type
Materials Science Applications
Information
Microscopy and Microanalysis , Volume 23 , Issue 3 , June 2017 , pp. 472 - 483
Copyright
© Microscopy Society of America 2017 

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