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. 23, 2019
Filed:
Dec. 04, 2014
Koninklijke Philips N.v., Eindhoven, NL;
Antonia Cornelia Van Rens, Nuenen, NL;
Alfons Wouter Groenland, Valkenswaard, NL;
Koninklijke Philips N.V., Eindhoven, NL;
Abstract
A capacitive micromachined ultrasonic transducer (CMUT) cell comprising three electrodes: a first electrode coupled to a cell membrane; a second electrode embedded into a cell floor opposing the first electrode and separated therefrom by a gas or vacuum cavity; and a third electrode opposing the second electrode on the cavity side, wherein a dielectric layer is sandwiched between the second electrode and the third electrode to create a capacitive relation between the second electrode and the third electrode. The three electrode CMUT cell provides an ultrasound transducer with two actively driven (controlled) electrodes.