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:
Sep. 17, 2013
Filed:
Jun. 15, 2009
Dana Pitzer, Unterschleissheim, DE;
Matthias Schreiter, München, DE;
Dana Pitzer, Unterschleissheim, DE;
Matthias Schreiter, München, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
In an arrangement of at least one piezoacoustic resonator on a substrate surface, the resonator has an piezoelectric layer, an electrode and a further electrode arranged such that activation of the electrodes leads to a resonance oscillation, the substrate surface is formed by an acoustic mirror integrated in the substrate for acoustically insulating substrate and resonator, and with a resonance frequency evaluation device being connected to the electrodes by tracks being routed through a mirror opening. The acoustic mirror has a Bragg reflector having λ/4-thick layers of different acoustic impedance. The topmost layer is made of silicon dioxide acting as an insulation layer in the mirror opening for electrically insulating the conductor track and the electrically conductive Bragg reflector layers. The arrangement is used as a physical transducer of a device for detecting a substance of a fluid, in particular of a fluid in the form of a liquid (biosensor).