Patent ID: 7670557

Claim:
A planar impedance sensor arrangement for detecting particles possibly contained in an analyte, comprising: a substrate; a first planar sensor electrode configured to immobilize catcher molecules; a second planar sensor electrode configured to immobilize the catcher molecules, the first and second planar sensor electrodes being formed at least one of on and in the substrate, the first sensor electrode and the second sensor electrode each being divided into a plurality of planar sensor electrode partial regions, the sensor electrode partial regions of the first sensor electrode and the sensor electrode partial regions of the second sensor electrode being arranged alternately in two dimensions in a surface plane of the substrate; a wiring structure, by which at least one portion of the sensor electrode partial regions of the first sensor electrode are electrically coupled to one another and by which at least one portion of the sensor electrode partial regions of the second sensor electrode are electrically coupled to one another; and an evaluation unit integrated in the substrate, the evaluation unit being configured to evaluate an impedance alteration sensor signal, wherein each of the planar sensor electrode partial regions of the first and second planar sensor electrodes has a width, in the surface plane of the substrate, that is less than a distance between a nearest edge of directly-adjacent planar sensor electrode partial regions.