Patent ID: 6657439
Filing Date: 2003-12-02
Classification: G01R

Abstract:
A sheet resistance meter of a non-contacting type for measuring a sheet resistance of a thin film formed on a substrate, comprising:a high frequency generation circuit; a sensor head including a coil, connected at an end thereof to the high-frequency generating circuit, for generating a magnetic field; sheet resistance detection means for detecting the sheet resistance of the thin film formed on the substrate on the basis of an eddy current loss, the sheet resistance detection means including eddy current loss detection means, connected to another end of the coil, for, when the substrate is placed at a predetermined distance from the sensor head, detecting an eddy current loss in the thin film due to the magnetic field generated by the coil; and wherein the sensor head is disposed opposing only one of two sides of the substrate in such a manner that both the sensor head and the sheet resistance detector means do not contact the substrate.