Surface acoustic wave (SAW) component e.g. for mobile communications devices

摘要

The SAW component includes a quartz substrate, a piezoelectric thin film with a positive temperature coefficient of a delay arranged on the substrate, and an inter-digital electrode, which is arranged in such way, that it is connected with the piezoelectric thin film. The substrate has a given angle at the Euler angles,and which is chosen so that the substrate comprises a negative temperature coefficient of the delay at a predetermined expansion direction. The piezoelectric thin film comprises an thickness which is chosen so, that a basic mode of a surface acoustic wave is excited on the substrate, in which the component operates.