TEMPERATURE COMPENSATED ORIENTATIONS OF BERLINITE FOR SURFACE ACOUSTIC WAVE DEVICES

摘要

TEMPERATURE COMPENSATED ORIENTATIONS OF BERLINITE FOR SURFACE ACOUSTIC WAVE DEVICES A piezoelectric wafer of single crystal berlinite, having a surface defined by an X-axis boule cut at an angle in the range from about 94.degree.-104.degree., provides an improved substrate for a surface acoustic wave device. These cut angles are relatively easy to fabricate, provide excellent temperature compensation in a range from -55.degree.C to 125.degree.C, and have high piezoelectric coupling coefficient.