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

Claim 5:
6. A bonding interface evaluation device for evaluating a joined state of a bonding interface between materials, comprising:
a probe configured to:
simultaneously transmit ultrasonic longitudinal wave and transverse wave in a substantially perpendicular direction to the bonding interface; and
receive a reflection signal of the ultrasonic longitudinal wave transmitted from the probe and reflected by the bonding interface and/or a transmission signal of the ultrasonic longitudinal wave transmitted from the probe and transmitted through the bonding interface and a reflection signal of the transverse wave transmitted from the probe and reflected by the bonding interface and/or a transmission signal of the transverse wave transmitted from the probe and transmitted through the bonding interface; and

a processor configured to:
evaluate 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 by the probe,
the predetermined physical quantity being a waveform, an amplitude or a spectrum of the reflection signal or the transmission signal.