Elastic boundary wave device

Details Elastic boundary wave device Elastic boundary wave device

2011-03-29

2011-03-29

Budd, Mark (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S31300R, C310S31300R

Reexamination Certificate

active

07915786

ABSTRACT:
An elastic boundary wave device of the present invention includes a plurality of elastic boundary wave elements. The elastic boundary wave elements each include a piezoelectric material layer, an electrode disposed over the piezoelectric material layer, a first dielectric layer formed over the piezoelectric material layer so as to cover the electrode, and a second dielectric layer formed over the first dielectric layer. An acoustic velocity of the second dielectric layers is faster than an acoustic velocity of the first dielectric layers, and the acoustic velocity of the second dielectric layer of at least one elastic boundary wave element from among the plurality of elastic boundary wave elements is different from the acoustic velocity of the second dielectric layer of another of the elastic boundary wave elements. This enables improving the degree of suppression in use as a filter in the elastic boundary wave device.

REFERENCES:
patent: 5694096 (1997-12-01), Ushiroku et al.
patent: 7259498 (2007-08-01), Nakatsuka et al.
patent: 7501916 (2009-03-01), Kando
patent: 7581306 (2009-09-01), Kadota et al.
patent: 7642694 (2010-01-01), Kando
patent: 7659653 (2010-02-01), Matsuda et al.
patent: 7741931 (2010-06-01), Matsuda et al.
patent: 2005/0057117 (2005-03-01), Nakatsuka et al.
patent: 2006/0138902 (2006-06-01), Kando
patent: 2006/0220494 (2006-10-01), Miura et al.
patent: 2007/0210676 (2007-09-01), Matsuda et al.
patent: 2008/0067896 (2008-03-01), Inoue et al.
patent: 2009/0115287 (2009-05-01), Kando
patent: 2009/0212659 (2009-08-01), Matsuda et al.
patent: 1 517 444 (2005-08-01), None
patent: 5-63500 (1993-03-01), None
patent: 2005-117641 (2005-04-01), None
patent: 2006-279609 (2006-10-01), None
patent: 2007-243473 (2007-09-01), None
patent: 2008-072316 (2008-03-01), None
patent: WO-98/52279 (1998-11-01), None
patent: WO-2005/069486 (2005-07-01), None
patent: WO-2006/114930 (2006-11-01), None

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