Patent ID: 9372215
Filing Date: 2016-06-21
CPC Classification: G01N,G01R

Claim Text:
1. An electrical resistance measurement apparatus comprising: a light irradiation unit that irradiates a conductive thin film with terahertz light; a reflection light detection unit that detects reflection light from the conductive thin film; and a computer containing a storage that stores a single equation representing correlation between the reflectance of the terahertz light from the conductive thin film and electrical resistance of the conductive thin film, the computer further containing a processor that determines reflectance of the terahertz light from the conductive thin film based on a result of detection performed by the reflection light detection unit, and calculates the electrical resistance of the conductive thin film by substituting the reflectance obtained by the determination into the equation, wherein the single equation is an exponential approximation equation y=A·x the light irradiation unit radiates the terahertz light having a frequency of 23 THz; and the exponential approximation equation is y=16.04x