ACOUSTIC WAVE DEVICE

Organization Name

murata manufacturing co., ltd.

Inventor(s)

Yasumasa Taniguchi of Nagaokakyo-shi JP

Haruki Kyouya of Nagaokakyo-shi JP

Daisuke Tamazaki of Nagaokakyo-shi JP

ACOUSTIC WAVE DEVICE

This abstract first appeared for US patent application 20250150056 titled 'ACOUSTIC WAVE DEVICE

Original Abstract Submitted

an acoustic wave device includes a piezoelectric substrate and an interdigital transducer electrode on the piezoelectric substrate. the interdigital transducer electrode includes a close-contact layer on the piezoelectric substrate, a cu—al alloy layer on the close-contact layer, and an al electrode layer on the cu—al alloy layer and having a weight-percentage concentration, in % by weight, of al of greater than about 50% by weight. the cu—al alloy layer and the al electrode layer are epitaxial layers. a thickness of the cu—al alloy layer is about 40% or less of a total thickness of the cu—al alloy layer and the al electrode layer.