Development of a Handmade Conductivity Measurement Device for Thin-Film Semiconductor and Its Application to Polypyrrole.

The precise measurement of conductivity of a semiconductor film such as polypyrrole (Ppy) should be carried out by the four-point probe method; however, this is difficult for classroom application. This article describes the development of a new, convenient, handmade conductivity device from inexpensive materials that can measure the conductivity of a thin-film semiconductor. Lessons on using the handmade device were conducted with high school students. The results show that the device was useful and trouble free for high school students to determine the electrical conductivity of Ppy.



  1. Beware of metricizing. Dr. Dean cautions us not to adopt a pure economic view of whatever it is we are measuring. When we take an economic approach, we are treating measurement as a pure cost analysis when, in fact, these types of measures can be misleading.used test equipment auction