Acoustic wave device
AssigneeMurata Manufacturing Co., Ltd.
InventorTakashi Iwamoto
Life of this patent
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Abstract
An acoustic wave device includes a first acoustic wave element including a first substrate having piezoelectricity at least in a portion thereof, a first functional electrode provided on a first surface of the first substrate, and a first wiring conductor electrically connected to the first functional electrode. The first acoustic wave element further includes a relay electrode on the first surface of the first substrate and electrically connected to a second wiring conductor, and a ground electrode on the first surface of the first substrate and electrically connected to the first functional electrode. The ground electrode is between at least one of the first functional electrode and the first wiring conductor, and the relay electrode, and is electrically insulated from the relay electrode.
Claims18
An acoustic wave device, comprising:
- a plurality of acoustic wave elements including a first acoustic wave element and a second acoustic wave element;
- wherein
- the second acoustic wave element is laminated on the first acoustic wave element;
- the first acoustic wave element includes:
- a first substrate having piezoelectricity at least in a portion thereof;
- a first functional electrode provided on one main surface of the first substrate;
- a first wiring conductor provided on the first substrate, and electrically connected to the first functional electrode;
- and
- a first signal electrode provided on the first substrate, and electrically connected to the first functional electrode with the first wiring conductor interposed therebetween;
- the second acoustic wave element includes:
- a second substrate having piezoelectricity at least in a portion thereof;
- a second functional electrode provided on one main surface of the second substrate;
- a second wiring conductor provided on the second substrate, and electrically connected to the second functional electrode;
- and
- a second signal electrode provided on the second substrate, and electrically connected to the second functional electrode with the second wiring conductor interposed therebetween;
- the first acoustic wave element further includes:
- a relay electrode provided on the one main surface of the first substrate, and electrically connected to the second functional electrode;
- and
- a ground electrode provided on the one main surface of the first substrate;
- and
- the ground electrode is provided between at least one of the first functional electrode and the first wiring conductor, and the relay electrode, and is electrically insulated from the relay electrode.
Dependencies are inferred from the claim text.