Surface acoustic wave element, surface acoustic wave device...

Details Surface acoustic wave element, surface acoustic wave device... Surface acoustic wave element, surface acoustic wave device...

2005-06-28

2005-06-28

Budd, Mark (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S344000

Reexamination Certificate

active

06911762

ABSTRACT:
A surface acoustic wave device includes a surface acoustic wave element, a packaging case, and a packaging electrode. The surface acoustic wave element has a piezoelectric substrate, an interdigital transducer, an electrode pad, an intermediate electrode, an upper electrode, and a bump electrode. The intermediate electrode is preferably made of NiCr including about 15 to about 30 weight percent of Cr. The electrode pad and upper electrode are made of Al. The bump electrode is press-bonded to the packaging electrode with an ultrasonic wave or heat applied to the bump electrode. The resulting surface acoustic wave device has excellent characteristics and the surface acoustic wave element is not removed or peeled from the packaging case during a drop test.

REFERENCES:
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patent: 6369490 (2002-04-01), Taga
patent: 6404110 (2002-06-01), Nakashima et al.
patent: 6552475 (2003-04-01), Hori et al.
patent: 38 25 671 (1989-03-01), None
patent: 1 049 253 (2000-11-01), None

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