Surface acoustic wave device, method for manufacturing, and...

Details Surface acoustic wave device, method for manufacturing, and... Surface acoustic wave device, method for manufacturing, and...

2005-11-29

2005-11-29

Budd, Mark (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S31300R, C310S344000

Reexamination Certificate

active

06969945

ABSTRACT:
A surface acoustic wave device which occupies a small mounting area and has a low profile, yet having an improved reliability, and can be made available at low cost. The surface acoustic wave device comprises a piezoelectric substrate, a function region formed of comb-like electrodes for exciting surface acoustic wave provided on a main surface of the piezoelectric substrate, a space formation member covering the function region, a plurality of bump electrodes provided on a main surface of the piezoelectric substrate and a terminal electrode provided opposed to the main surface of piezoelectric substrate. The bump electrode and the terminal electrode are having a direct electrical connection, and a space between piezoelectric substrate and terminal electrode is filled with resin. When the above-configured acoustic wave device is applied for a frequency filter, a resonator, in a portable telephone unit, a keyless entry or the like communication apparatus, the overall size of such apparatus can be reduced and a higher reliability is implemented.

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International Search Report corresponding to application No. PCT/JP02/00949 dated Apr. 2, 2002.
English translation of Form PCT/ISA/210.

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