The carrier concentration we are measuring is inversely proportional to that area squared. So the area has a big effect on carrier concentration and regular calibration is important. The measurement conditions in Paragraphs 14.1.5 through 14.1.9 should be standardised, even if they are different for different materials. This is not possible, with more than 20 years of use individual users have adopted conditions which work best for them and are very unlikely to change. It is for this reason we have not stipulated electrolytes.
Users tend to find certain electrolytes and measurement conditions work best for their samples.
The standard simply makes users aware of the factors which effect the accuracy and repeatability of the result. It addresses general areas of best practice and tries to ensure customers and suppliers can repeat measurements on a given sample. Nikko Materials Co., Ltd. Recommended ring area calibration too frequent. The carrier concentration we are measuring is inversely proportional to that area squared. So the area has a big effect on carrier concentration and regular calibration is important.