Wave transmission lines and networks – Coupling networks – Electromechanical filter
Reexamination Certificate
2008-07-03
2009-12-08
Takaoka, Dean O (Department: 2817)
Wave transmission lines and networks
Coupling networks
Electromechanical filter
C333S133000
Reexamination Certificate
active
07629866
ABSTRACT:
A method for manufacturing a surface acoustic wave filter device includes a step of forming grooves in one principal surface of a piezoelectric substrate, a step of embedding a metallic film in the grooves to form IDT electrodes, a step of performing a process of removing a portion of the piezoelectric substrate from the one principal surface of the piezoelectric substrate, thereby forming a recessed portion including the bottom surface in which the IDT electrodes are embedded, and a step of bonding a cover member to the piezoelectric substrate.
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Official Communication issued in International Patent Application No. PCT/JP2006/324752, mailed on Apr. 10, 2007.
Kadota Michio
Kimura Tetsuya
Keating & Bennett LLP
Murata Manufacturing Co. Ltd.
Takaoka Dean O
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