Ultrasound devices

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United States of America Patent

PATENT NO 11986349
APP PUB NO 20190336104A1
SERIAL NO

16401630

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Abstract

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An ultrasound device is described. The ultrasound device may include a cavity, a membrane, and a sensing electrode. When an electrical signal is applied to the sensing electrode and a static bias is applied to the membrane, the membrane vibrates within the cavity and produces ultrasonic signals. The cavity, the membrane, and the sensing electrode may be considered a capacitive micromachined ultrasonic transducer (CMUT). The sensing electrode may be shaped as a ring, whereby the central portion of the sensing electrode is removed. Removal of the central portion of the sensing electrode may reduce the parasitic capacitance without substantially affecting the production of ultrasonic signals by the CMUT. This, in turn, can result in an increase in the signal-to-noise ratio (SNR) of the ultrasonic signals. The ultrasound device may further include a bond pad configured for wire bonding, and a trench electrically isolating the bond pad from the membrane.

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Patent Owner(s)

Patent OwnerAddress
BFLY OPERATIONS INC1600 DISTRICT AVE BURLINGTON MA 01803

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fife, Keith G Palo Alto, US 221 4923
Liu, Jianwei Fremont, US 127 591
Lutsky, Joseph Los Altos, US 20 208
Satir, Sarp San Francisco, US 11 71
Yang, Jungwook Newton, US 42 1534

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