Kazutaka Sato

Analysis of resistance change of thick‐film resistor by electric pulse loading

An analysis of the electrical conduction mechanism in a thick-film resistor is carried out by numerical calculations. In thick-film resistors, the resistance value tends to decrease when a high-voltage short-term pulse signal is applied. In order to elucidate this mechanism, a numerical model of the thick-film resistor is analyzed and is compared with the experimental results. The model used in the analysis consists of conductive particles and the conductive paths connecting the conductive particles. The resistance value of the conductive path is assumed to shift to a low-resistance state when the electric field intensity of the applied pulse signal in the conductive path exceeds the threshold value. From the results of the analysis, it is found that the above model coincides with the experimental results of the thick-film resistor on the variation of the resistance value under a high-voltage pulse signal application.

Mechanical characteristics of a new compact size color laser printer for home use

Electrophotography has become a widely used technology for printing images on various printing media. Different types of color printers using this technology have been developed. However, most of the existing color printers are convenient for office use but are still too large and expensive for home or personal use. We have developed a compact size color laser printer that can be conveniently used for home use. This printer can produce high-quality color images and text on plain paper, postal cards, and transparencies at a print speed of 6 pages per minute (ppm) in color or 24 ppm in monochrome. Several new mechanical technologies have been developed, and the two main ones are described in this paper.