Piezoelectric crystal element
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United States of America Patent
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Aug 8, 1995
Grant Date -
N/A
app pub date -
Jul 15, 1994
filing date -
Jul 20, 1993
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Abstract
A piezoelectric crystal element for surface acoustic wave applications with a quartz substrate with at least one substantially planar quartz surface, the planar quartz surface having an epitaxially grown layer of a quartz-isomorphous crystal with the total molecular formula ABO.sub.4, A standing for Al or Ga, and B for P or As, and the quartz surface and the epitaxial layer having approximately the same crystallographic orientation.
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