Temperature compensated orientation of berlinite for surface...

Details Temperature compensated orientation of berlinite for surface... Temperature compensated orientation of berlinite for surface...

H - Electricity

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349/59.1

H01L 41/04 (2006.01) H03H 9/02 (2006.01)

Patent

CA 1217853

ABSTRACT TEMPERATURE COMPENSATED ORIENTATION 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 about 85°, provides an improved substrate for a surface acoustic wave device. The 85° cut angle is relatively easy to fabricate, provides excellent temperature compensation in a range from 20°C to 100°C, and has high piezoelectric coupling coefficient.

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