Surface acoustic wave (SAW) device

Details Surface acoustic wave (SAW) device Surface acoustic wave (SAW) device

2006-02-14

2006-02-14

Nguyen, Tuan H. (Department: 2813)

Active solid-state devices (e.g., transistors, solid-state diode

Responsive to non-electrical signal

C257S416000, C257S795000

Reexamination Certificate

active

06998687

ABSTRACT:
A surface acoustic wave (SAW) device having improved moisture resistance is provided. The device includes a piezoelectric substrate, an interdigital transducer (IDT) electrode on a first surface of the piezoelectric substrate, and a resin coating for covering the IDT electrode. After a piece of resin material of the resin coating is dipped in an amount of pure water as solvent having a mass as 10 times great as the piece of resin material at 120° C. under 2 atom pressure for twenty hours, a concentration of chlorine ion in the solvent is not higher than 50 ppm.

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