Patent ID: 8336192

Claim:
A method of collective fabrication of remotely interrogatable sensors, each sensor includes at least one first resonator and at least one second resonator, each of the at least one resonator includes acoustic wave transducers that exhibit a first and a second operating frequency, the method comprising: fabricating a first series of the at least one first resonators exhibiting a first resonant frequency at ambient temperature and a first static capacitance; fabricating a second series of the at least one second resonators exhibiting a second resonant frequency at ambient temperature and a second static capacitance; performing a series of electrical measurements of the first series of the at least one first resonators and the second series of the at least one second resonators to determine first pairs and second pairs of resonant frequency and of capacitance of each of the at least one first resonators and the at least one second resonators; and performing a series of matching of a first resonator and of a second resonator based at least in part on the aggregate of two criteria: (a). a dispersion in a difference in resonant frequency of each of the at least one first resonators and the at least one second resonators is less than a first threshold value; and (b) a dispersion in a difference in capacitance of each of the at least one first resonators and the at least one second resonators is less than a second threshold value.