Patent ID: 9046464
Filing Date: 2015-06-02
Classification: G01N

Abstract:
1. A device for detecting at least one substance of a fluid, comprising a piezoacoustic thin film resonator comprising: at least one piezoelectric layer, a first electrode layer arranged on a first side of the piezoelectric layer, the first electrode layer having a side facing away from the piezoelectric layer, at least one second electrode layer arranged on a second side of the piezoelectric layer, and an electrical insulating layer arranged on the side of the first electrode layer facing away from the piezoelectric layer, the electrical insulating layer completely covering both the first and second electrode layers such that the fluid is completely prevented from contacting the first and second electrode layers, at least one adsorption surface for adsorbing the substance of the fluid, the at least one adsorption surface being physically separated from the first electrode layer by the electrical insulating layer, wherein the piezoelectric layer, the first and second electrode layers and the adsorption surface are designed and arranged relative to one another such that: