Patent ID: 7535236

Claim:
A method of measuring thickness of a thin film using microwaves, comprising: a first step of measuring a Q-factor of a dielectric resonator using a separate network analyzer; a second step of determining an effective surface resistance of a superconductor thin film and a loss tangent (tan δ) of a dielectric using the Q-factor of the dielectric resonator measured at the first step; a third step of measuring the electromagnetic wave penetration depth for the superconductor thin film while temperatures of a superconductor thin film placed on a bottom surface of the dielectric resonator and the dielectric are maintained at a constant temperature, and only the temperature of the superconductor thin film used as the top plate of the resonator can be changed; a fourth step of calculating an intrinsic surface resistance of the superconductor thin film for calibration using the effective surface resistance determined at the second step and the electromagnetic wave penetration depth for the superconductor measured at the third step; and a fifth step of measuring a thickness of a superconductor based on the effective surface resistance of the superconductor, using a calibrated value of the intrinsic surface resistance of the superconductor thin film determined at the fourth step.