Preamplifying cantilever and applications thereof
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United States of America Patent
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Jul 12, 2011
Grant Date -
Jan 21, 2010
app pub date -
May 26, 2009
filing date -
May 23, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Aspects of the invention are directed to piezoresponse force analysis of a material. A stimulus signal including a first frequency component is applied to a contact point on the material such that the stimulus signal actuates a portion of the material to experience a motion as a result of a piezoelectric effect. A resonant device is coupled to the contact point such that the resonant device experiences a resonant motion at the first frequency component in response to the motion of the material, the resonant motion having a greater displacement than a displacement of the motion of the material, and is substantially unaffected by mechanical properties of the material at the contact point. The resonant motion of the resonant device is detected and processed to produce a measurement representing the piezoresponse of the material at the contact point.
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