Resistor excellent in micro-linearity characteristic and wear resistance and variable resistor using the same

摘要

A variable resistor uses a carbon fiber-base resistor with a specific distribution of carbon particle sizes. Because the particle size distribution of carbon fiber is approximately equal to the normal distribution and 80% by volume or more carbon fiber is included in the particle size range from 1 to 20 mum, high conductivity in the fiber length direction of carbon fiber that is served as structural material for improving the wear resistance does not affect the micro-linearity.