Sensitivity of interface acoustic waves to the nature of the interface

Author

Clatot, Stanislas ; Laude, Vincent ; Reinhardt, Alexandre ; Wilm, Mikael ; Daniau, William ; Ballandras, Sylvain ; Lardat, Raphael ; Solal, Marc

Author_Institution

Lab. de Phys. et de Metrologie des Oscillateurs, CNRS, Besancon, France

Volume

2

fYear

2003

fDate

5-8 Oct. 2003

Firstpage

2126

Abstract

A finite element analysis/boundary integral method (FEA/BIM) model is used to investigate the influence of the geometry and the composition of the interface on the properties of interface acoustic waves (IAW). The method considers a finite region treated by FEA and submitted to periodic boundary conditions, taking into account radiation in both the bottom and the top half-spaces. The influence of the IDT thickness and of the material choice for the interfacial film are discussed for some cuts and structures. It is found that the most significant contribution of the interface geometry is to the ability of an IAW device of efficiently guiding waves, i.e. to the propagation losses.

Keywords

acoustic wave propagation; boundary integral equations; finite element analysis; interdigital transducers; interface structure; surface acoustic waves; IDT thickness; boundary integral method; film material; finite element analysis; finite region; interface acoustic waves; interface composition; interface geometry; interfacial film; periodic boundary conditions; Acoustic waves; Attenuation; Variable speed drives;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics, 2003 IEEE Symposium on

Print_ISBN

0-7803-7922-5

Type

conf

DOI

10.1109/ULTSYM.2003.1293340

Filename

1293340