Boundary acoustic wave device

Details Boundary acoustic wave device Boundary acoustic wave device

2008-02-12

2009-02-10

Dougherty, Thomas M (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

Reexamination Certificate

active

07489065

ABSTRACT:
A dielectric substance is laminated on one surface of a piezoelectric substance, and an IDT and reflectors are disposed as electrodes at a boundary between the piezoelectric substance and the dielectric substance, and the thickness of the electrodes is determined so that the acoustic velocity of the Stoneley wave is decreased less than that of a slow transverse wave propagating through the dielectric substance and that of a slow transverse wave propagating through the piezoelectric substance, thereby forming a boundary acoustic wave device.

REFERENCES:
patent: 6046656 (2000-04-01), Mishima
patent: 7323803 (2008-01-01), Kando
patent: 7355319 (2008-04-01), Kando
patent: 7360292 (2008-04-01), Ladabaum
patent: 2007/0229192 (2007-10-01), Miura et al.
patent: 58-175315 (1983-10-01), None
Kando; “Boundary Acoustic Wave Device”; U.S. Appl. No. 10/597,115, filed Jul. 12, 2006.

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