Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2006-05-30
2006-05-30
Schuberg, Darren (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S31300R
Reexamination Certificate
active
07053523
ABSTRACT:
An Interdigital Bulk Acoustic-Wave Transducer (IBAT) device is provided with pairs of exciting electrode fingers disposed sufficiently close together on the piezoelectric substrate and dielectric coating over the exciting electrode fingers to generate an IC-compatible voltage at relatively high electric field strength, resulting in a reduced region of excitation and uniform electric field strength distribution. The IBAT advantageously produces a lateral electric field substantially uniform over a substantial portion of the active BAW structure area, reducing, or virtually eliminating sharp voltage spikes, an electrical field produced by the low voltages resident on integrated circuit (IC) chips, usually of a magnitude of 10 volts, or lower, the planar electrode structure being compatible with IC processing techniques, such as photolithography and the BAWs produced thereby being essentially plane waves, with propagation away from, but with phase progression substantially parallel to, the substrate surface. Numerous IBAT structural arrangements are possible by advantageously over-coating the IBAT electrode finger stripes with an insulating dielectric in different configurations, and any possible configuration achieved through over-coating is considered to be within the contemplation of the devices and methods of the present invention. Interdigital bulk acoustic wave transducers and methods for exciting bulk acoustic waves with interdigital electrode fingers are also provided.
REFERENCES:
patent: 4350916 (1982-09-01), August et al.
patent: 5889446 (1999-03-01), Yamada et al.
patent: 6465930 (2002-10-01), Wright
patent: 6657363 (2003-12-01), Aigner
patent: 2004/0201306 (2004-10-01), Yamanouchi
patent: 09260993 (1997-10-01), None
patent: 2005012736 (2005-01-01), None
Ballato Arthur
Lu Yicheng
Tong Xiaojun
Wittstruck Richard H.
Aguirrechea J.
Schuberg Darren
Tereschuk George B.
The United States of America as represented by the Secretary of
Zelenka Michael
LandOfFree
Lateral field excitation of bulk acoustic waves from an... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lateral field excitation of bulk acoustic waves from an..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lateral field excitation of bulk acoustic waves from an... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3572644