Patent ID: 7500379

Claim:
An acoustic wave array sensor device, comprising (a) a single crystal piezoelectric substrate; (b) said single crystal piezoelectric substrate defining at least two microfluidic channels extending into said substrate at a first side of said substrate so that said single crystal piezoelectric substrate is thinned at said channels to form thinned portions; (c) a layer of at least one material with a shear acoustic wave speed lower than a shear acoustic wave speed in said substrate, said layer being deposited on at least a portion of each of said thinned portions at a bottom of said at least two microfluidic channels to provide guiding of an acoustic wave and conversion into a layer guided shear horizontal acoustic plate mode; (d) at least one first surface acoustic wave transducer disposed on at least a portion of each said thinned portions, said at least one transducer being disposed on a surface of said piezoelectric substrate at a second side opposite from said first side; (e) at least one second surface acoustic wave element formed on a portion of each of said thinned portions on said second side of said substrate, said at least one second acoustic wave element being spaced from said at least one first surface acoustic wave transducer; and (f) wherein the said first surface acoustic wave transducer and said at least one second surface acoustic wave element in each channel are structured so as to effect uniquely identifiable responses from each channel.