Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2006-05-30
2006-05-30
Williams, Hezron (Department: 2856)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C342S051000, C333S153000, C333S154000, C340S571000, C340S870030
Reexamination Certificate
active
07053524
ABSTRACT:
A surface acoustic wave sensor or identification device has a piezoelectric material, and an interdigitated transducer (IDT) input/output mounted on the piezoelectric material for receiving a radio frequency (RF) signal and propagating a corresponding surface acoustic wave along a surface of the piezoelectric material. An IDT finger electrode array is mounted on the piezoelectric material and is operable to communicate with the IDT input/output for transmission of a modified RF signal from the device. The IDT finger electrode array has at least one finger electrode segment whose propagating characteristics are controlled to control the nature of the modified RF signal. A biolayer is mounted on the piezoelectric material and is associated with the finger electrode segment, and a fluidic chamber is associated with the biolayer. In use, the fluidic chamber contains fluid which, if a predetermined substance to be sensed or detected is present, operates to modify the biolayer which in turn controls the nature of the modified RF signal.
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Campbell Colin K.
Edmonson Peter J.
Hunt William D.
Delbridge Robert F.
Miller Rose M.
P.J. Edmonson Ltd.
Williams Hezron
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