Substrate for large bandwidth SAW component, comprises single crystal layer in which substrate surface is orientated at given angle about X-axis

摘要

A surface acoustic wave (SAW) component has a piezoelectric substrate, a metallizing comprising metal strips applied on the substrate with a spacing relative to one another, an average metallizing ratio (eta; where eta = b/(d+b)) ascertained from the strip-width (b) and the strip-spacing (d), a relative metallizing height (h/lambda) set in relation to the wave length (lambda). The substrate comprises a wafer or layer of single-crystal LiTaO3 and in which one surface of the substrate has an orientation which corresponds to an intersection angle (alpha), rotated about the x-axis and calculated relative to the y-axis and with the angular range of 46 degrees is less than (alpha) is less than 47 degrees.