Film bulk acoustic device with integrated tunable and trimmable device
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United States of America Patent
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Aug 2, 2005
Grant Date -
Nov 6, 2003
app pub date -
Sep 25, 2002
filing date -
May 3, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A film bulk acoustic device having integrated trimmable device comprises a FBAR and a integrated tunable and trimmable device being integrated on a common substrate, at least a common electrode or piezoelectric layer. By trimming the integrated trimmable device or the FBAR and alter either the capacitance or inductance of the integrated trimmable device until the film bulk acoustic device having integrated trimmable device achieves the target resonance frequency. By taking advantage of the electrostatic force, the integrated tunable device is capable of providing tuning until the film bulk acoustic device having integrated tunable device achieves the target resonance frequency.
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