Ultrasound transducer and ultrasound diagnostic apparatus

Details Ultrasound transducer and ultrasound diagnostic apparatus Ultrasound transducer and ultrasound diagnostic apparatus

2011-08-09

2011-08-09

Pihulic, Dan (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Signal transducers

Receivers

Reexamination Certificate

active

07995423

ABSTRACT:
This invention includes a first electrode which is fixed on a base, a vibration film which is disposed to oppose the first electrode with an air and vacuum portion between the vibration film and the first electrode, a second electrode which is supported by the vibration film and is connected to a predetermined potential, a ferroelectric which is electrically connected to the first electrode, and a driving portion that applies, to the first electrode, a driving signal which is a monopulse voltage signal and whose polarity is reversed every time the driving signal is outputted.

REFERENCES:
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patent: 2009/0204004 (2009-08-01), Adachi et al.
patent: 2004-503313 (2004-02-01), None
patent: 2006-122188 (2006-05-01), None
patent: 2006-122344 (2006-05-01), None
patent: 2006-198240 (2006-08-01), None
patent: WO 01/97562 (2001-12-01), None
patent: WO 2005/077012 (2005-08-01), None
patent: WO 2005/120360 (2005-12-01), None
patent: WO 2006/046471 (2006-05-01), None
patent: WO 2008044727 (2008-04-01), None

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