Patent ID: 11898990
Assignee: SHIMANE UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A bonding interface evaluation method for evaluating a joined state of a bonding interface between materials, comprising:
a transmission step of simultaneously transmitting an ultrasonic longitudinal wave and a transverse wave in a substantially perpendicular direction to the bonding interface;
a reception step of receiving a reflection signal of the ultrasonic longitudinal wave transmitted in the transmission step and reflected by the bonding interface and/or a transmission signal of the ultrasonic longitudinal wave transmitted in the transmission step and transmitted through the bonding interface, and a reflection signal of the transverse wave transmitted in the transmission step and reflected by the bonding interface and/or a transmission signal of the transverse wave transmitted in the transmission step and transmitted through the bonding interface; and
an evaluation step of evaluating a bonding area, an interface opening or a bonding strength of the bonding interface as the joined state of the bonding interface based on a difference between a predetermined physical quantity of the transmission signal of the ultrasonic longitudinal wave and a predetermined physical quantity of the reflection signal of the transverse wave, a difference between a predetermined physical quantity of the reflection signal of the ultrasonic longitudinal wave and a predetermined physical quantity of the transmission signal of the transverse wave, or a difference between a predetermined physical quantity of the reflection signal of the ultrasonic longitudinal wave and a predetermined physical quantity of the reflection signal of the transverse wave, out of signals received in the reception step,
the predetermined physical quantity being a waveform, an amplitude or a spectrum of the reflection signal or the transmission signal.