Acoustic wave device, resonator and filter

Details Acoustic wave device, resonator and filter Acoustic wave device, resonator and filter

2007-09-25

2010-06-22

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S193000, C333S195000, C310S312000, C310S31300R

Reexamination Certificate

active

07741931

ABSTRACT:
A filter includes a parallel resonator having first comb electrodes provided on a piezoelectric substrate and a first dielectric film that covers the first comb electrodes, and a series resonator having second comb electrodes provided on the piezoelectric substrate and a second dielectric film covers the second comb electrodes and is made of a material identical to that of the first dielectric film. The first dielectric film has a different thickness from that of the second dielectric film.

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Machine Translation of JP 2000-068784, Inose et al., Mar. 2000.
Machine Translation of JP 2000-196409, Funemi et al., Jul. 2000.

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