Patent ID: 11898987
Assignee: RAYTHEON COMPANY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An apparatus comprising:
a surface acoustic wave (SAW) sensor comprising:
a piezoelectric substrate;
first and second interdigitating transistors over the piezoelectric substrate, the first interdigitating transistor configured to convert an input electrical signal into an acoustic wave, the second interdigitating transistor configured to convert the acoustic wave into an output electrical signal, the piezoelectric substrate configured to transport the acoustic wave; and
a detection layer over the piezoelectric substrate and positioned at least partially between the first and second interdigitating transistors, the detection layer comprising (i) antibodies configured to bind to one or more biological analytes and (ii) a hydrogel layer over the antibodies;

wherein each of the first and second interdigitating transistors comprises multiple conductive fingers; and
wherein the detection layer extends between and into the first and second interdigitating transistors such that portions of the detection layer are positioned between the multiple conductive fingers in each of the first and second interdigitating transistors.