Film bulk-acoustic resonator filter having...

Details Film bulk-acoustic resonator filter having... Film bulk-acoustic resonator filter having...

2007-03-27

2007-03-27

Takaoka, Dean (Department: 2817)

Wave transmission lines and networks

Coupling networks

Electromechanical filter

C333S190000

Reexamination Certificate

active

11059375

ABSTRACT:
An FBAR filter includes a wafer, a filter circuit unit and a balun circuit unit. The filter circuit unit includes a plurality of FBAR resonators formed on a predetermined region on a top of the wafer. The balun circuit unit includes a plurality of metal layers electrically connected to each other to implement a balun circuit and a plurality of dielectric layers each placed between the plurality of metal layers. The balun circuit unit is electrically connected to the filter circuit unit on a predetermined region of the wafer.

REFERENCES:
patent: 6670866 (2003-12-01), Ellä et al.
patent: 2003-338723 (2003-11-01), None
patent: 2003-25247 (2003-03-01), None
Korean Intellectual Property Office Office Action mailed May 22, 2006.

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