Piezoelectric electroacoustic transducer and manufacturing...

Details Piezoelectric electroacoustic transducer and manufacturing... Piezoelectric electroacoustic transducer and manufacturing...

2005-06-28

2005-06-28

Kuntz, Curtis (Department: 2643)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electrostrictive, magnetostrictive, or piezoelectric

C381S398000, C381S114000, C381S173000, C310S324000, C310S345000, C310S332000, C181S170000, C181S171000

Reexamination Certificate

active

06912288

ABSTRACT:
A piezoelectric electroacoustic transducer, including a plurality of piezoelectric layers deposited to define a deposited product, flexurally vibrates the deposited product by polarizing the entire piezoelectric ceramic layers in the same thickness direction and also by applying an alternating signal between external electrodes disposed on the front/rear major surfaces of the deposited product and an internal electrode disposed between the ceramic layers. A dummy electrode is provided between the ceramic layers outside the internal electrode via a gap, and a portion of the internal electrode is exposed at at least one side surface of the piezoelectric ceramic layers, while the dummy electrode is exposed at the other side surface of the piezoelectric ceramic layers. The external electrodes extend to the side surfaces other than the side surface at which the internal electrode is exposed.

REFERENCES:
patent: 5684884 (1997-11-01), Nakaya et al.
patent: 5889873 (1999-03-01), Sasaki
patent: 5991988 (1999-11-01), Tabota et al.
patent: 6040652 (2000-03-01), Kaida
patent: 6424080 (2002-07-01), Ando et al.
patent: 6437488 (2002-08-01), Sube et al.
patent: 6577486 (2003-06-01), Nishimiya et al.
patent: 10-336792 (1998-12-01), None
patent: 2001-95094 (2001-04-01), None

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