Characteristics and the present status of SAW materials in Japanese industries

Shimizu, Yasutaka

doi:10.1002/ecjc.4430760707

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…Usually, an anisotropic piezoelectric substrate is covered with an aluminum layer or grating up to h/λ = 10%. Materials, crystal cuts, and layer thickness have to be chosen such that they meet different requirements such as minimum attenuation, temperature stability, or high coupling efficiency [1]. In fact, a metal layer strongly affects the propagation of the SAWs.…”

Section: Introductionmentioning

confidence: 99%

Theoretical studies on leaky-SAW properties influenced by layers on anisotropic piezoelectric crystals

Wallner

Ruile²,

Weigel³

2000

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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Theoretical studies on the behavior of leaky-SAW (LSAW) properties in layered structures were performed. For these calculations rotYX LiTaO (3) and rotYX LiNbO(3) LSAW crystal cuts were used, assuming different layer materials. For LSAWs both the velocity and the inherent loss due to bulk wave emission into the substrate are strongly influenced by distinct layer parameters. As a result, these layer properties like elastic constants or thickness have shown a strong influence on the crystal cut angle of minimum LSAW loss. Moreover, for soft and stiff layer materials, a different shift of the LSAW loss minimum can occur. Therefore, using double-layer structures, the shift of the LSAW loss minimum can be influenced by appropriate chosen layers and ratios.

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Section: Introductionmentioning

confidence: 99%