Boundary acoustic wave device and method for manufacturing...

Details Boundary acoustic wave device and method for manufacturing... Boundary acoustic wave device and method for manufacturing...

2011-03-08

2011-03-08

Benson, Walter (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S31300R, C310S31300R

Reexamination Certificate

active

07902717

ABSTRACT:
A boundary acoustic wave device includes a piezoelectric substance, a dielectric substance laminated on the piezoelectric substance, and an electrode film disposed at a boundary between the piezoelectric substance and a dielectric substance, the device utilizing a boundary acoustic wave propagating along the boundary, wherein the electrode film is any one Au alloy electrode film of an Au alloy electrode film including Cu at a ratio of about 0.01% to about 4.8% by weight, an Au alloy electrode film including Pd at a ratio of about 0.01% to about 6.8% by weight, and an Au alloy electrode film including Ni at a ratio of about 0.01% to about 3.5% by weight.

REFERENCES:
patent: 2006/0071579 (2006-04-01), Kando
patent: 2007/0007852 (2007-01-01), Kando
patent: 2008/0290968 (2008-11-01), Yamamoto et al.
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Official Communication issued in International Patent Application No. PCT/JP2007/064323, mailed on Oct. 2, 2007.
Cullen et al.; “Surface and interface acoustic waves in SiO2/YX-LiNbO3,” American Institute of Physics, Appl. Phys. Lett. 44(2), Jan. 15, 1984, pp. 182-184.

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