The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 2018
Filed:
Mar. 01, 2013
Koninklijke Philips N.v., Eindhoven, NL;
George Anthony Brock-Fisher, Eindhoven, NL;
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Abstract
The present invention relates to a capacitive micro-machined ultrasound transducer (CMUT) device () for transmitting and/or receiving ultrasound waves, comprising at least one CMUT cell (). The CMUT cell () comprises a substrate () comprising a first electrode (), a membrane () comprising a second electrode (), at least one dielectric layer () between the first electrode () and the second electrode (), and a cavity () formed between the substrate () and the membrane (). The CMUT device () further comprises an operating bias voltage source () for supplying an operating bias voltage (V) of a first polarity between the first and second electrode () during transmitting and/or receiving ultrasound waves, and a charging voltage source () for supplying an additional charging voltage (V) between the first and second electrode (), the second polarity being the reverse polarity of the first polarity. The present invention further relates to a method of operating such a CMUT device.