Composite substrate of surface acoustic label device for RFID and sensor applications

摘要

The invention relates to a surface acoustic wave label device (202) including an acoustic wave propagation substrate.At least one transducer structure (204) (216) including a bifurcated comb electrode,And at least one reflecting device including at least one reflecting device (, 206208210).It is characterized in that the acoustic wave propagation substrate (202) is a composite substrate (202), including a substrate (226) and a piezoelectric layer (224).The crystal direction (224) of the piezoelectric layer propagates the shear waves in and in the direction of the piezoelectric layer (224) relative to the substrate (226Make it possible for sound waves to travel. The invention also relates to a physical quantity determining device and a method (200) for manufacturing such a surface acoustic wave label device.