Piezoelectric crystal element

Details Piezoelectric crystal element Piezoelectric crystal element

1994-07-15

1995-08-08

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310313R, 310313D, 310361, H01L 4104

Patent

active

054401887

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.

REFERENCES:
patent: 4109172 (1978-08-01), O'Connell
patent: 4172906 (1979-10-01), Pancholy
patent: 4324773 (1982-04-01), Chai et al.
patent: 4382840 (1983-05-01), Chai et al.
patent: 4609843 (1986-09-01), Cann et al.
patent: 4992694 (1991-02-01), Gunter et al.
patent: 5151110 (1992-09-01), Bein et al.
patent: 5369327 (1994-11-01), Wallnofer et al.

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