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:
Oct. 21, 2008
Filed:
Jun. 07, 2004
William Ossmann, Acton, MA (US);
William Ossmann, Acton, MA (US);
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
Ultrasonic transducer including a multi-layer transformer arranged between a backing block and piezoelectric layer on each of which at least one matching layer is arranged. The transformer includes a substrate having an electronic circuit, one or more acoustically active layers and an interconnect layer interposed between the piezoelectric layer and the substrate. The properties of the substrate, each acoustically active layer and the interconnect layer are selected and then the acoustic impedance of the transformer at a side of the piezoelectric layer adjacent the transformer is determined. The properties are then varied, e.g., using a computer simulation, until values for these properties are obtained which provide a desired acoustic performance characteristic at the side of the piezoelectric layer adjacent the transformer. The electronic circuit is thus considered in the determination of the acoustic impedance of the transformer.