Patent ID: 11867567
Assignee: NETZSCH JAPAN K.K.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. A thermo-physical property measurement method comprising:
a heating light irradiation step for irradiating a sample thin film with repeated pulsed heating light through a light shield that includes an aperture and is provided facing a front surface or rear surface of the sample thin film and shields the sample thin film from light except for the aperture;
a temperature measurement light irradiation step for applying temperature measurement light to a measurement position that is a predetermined distance away in an in-plane direction along an extending direction of the front surface from a heating light irradiation position on the sample thin film irradiated with the heating light through the aperture;
a light detection step for detecting reflected light of the temperature measurement light off of the sample thin film; and
a thermo-physical property value calculation step for calculating a thermo-physical property value in the in-plane direction of the sample thin film based on a reflected light intensity of the reflected light detected at the light detection step, wherein
a diameter of a spot of the heating light applied to the light shield is larger than a diameter of a spot of the temperature measurement light on the sample thin film,
in the in-plane direction, a center of the spot of the temperature measurement light is included in the spot of the heating light, and
in the temperature measurement light irradiation step, the measurement position is separated from the heating light irradiation position by the predetermined distance by moving the light shield having the aperture and the sample thin film in the in-plane direction.