Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Reexamination Certificate
2011-01-11
2011-01-11
Thomas, Eric (Department: 2835)
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
C361S311000
Reexamination Certificate
active
07869187
ABSTRACT:
An acoustic bandgap structure can include a stack of at least three ferroelectric layers with a top side and bottom side of each of the ferroelectric layers contacting an electrode layer, where the ferroelectric layers and the electrode layers form a substantially periodic structure in the direction normal to the ferroelectric and electrode layers and where an acoustic characteristic impedance and thickness of each layer are selected to realize an acoustic bandgap over a desired frequency band for the purpose of improving the device Q.
REFERENCES:
patent: 4240003 (1980-12-01), Larson, III
patent: 6437484 (2002-08-01), Nishimura et al.
patent: 2004/0184217 (2004-09-01), List et al.
patent: 2006/0274476 (2006-12-01), Cervin-Lawry et al.
patent: 2008/0253056 (2008-10-01), Leidl et al.
patent: WO 2007031061 (2007-03-01), None
Guntin Ed
Guntin Meles & Gust
Paratek Microwave Inc.
Thomas Eric
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