Patent ID: 6031315
Filing Date: 2000-02-29
Classification: H03H

Abstract:
A surface acoustic wave (SAW) device comprising:a quartz substrate having a SAW propagation surface; andat least one interdigital transducer having electrodes on the surface for launching and/or detecting surface acoustic waves, wherein a surface wave direction of propagation is along an X' axis, the substrate further having an Z' axis normal to the surface, and a Y' axis along the surface and perpendicular to the X' axis, the quartz substrate further having a crystal orientation defined by crystal axes X,Y, and Z, the relative orientation of device axes X', Y', and Z' being defined by Euler angles lambda, mu, and theta, wherein lambda has a value ranging from -5.degree. to 5.degree., mu has a value ranging from 37.degree. to 46.degree., and theta has a value ranging from 20.degree. to 26.degree..