Patent ID: 9425384
Filing Date: 2016-08-23
CPC Classification: B06B,G21C,H01L,Y02E,Y10T

Claim Text:
1. A process for manufacturing a high-temperature ultrasonic transducer, said transducer comprising a steel or metal top electrode a piezoelectric converter, a steel or metal support ensuring the interface between the converter and the propagation medium of the acoustic waves, a first joint between the support and a piezoelectric material, and a second joint between the converter and the top electrode, comprising the following steps to produce said joints: depositing a gold layer then depositing an indium layer on one of the faces of the top electrode, on both faces of the converter, and on one face of the steel support; stacking the support, the converter, and the top electrode, this stack being maintained under pressure; and producing the indium-and-gold-compound-based first and second joints via a brazing and diffusing operation, said brazing and diffusing operation comprising the following steps: