ACOUSTIC BOUNDARY WAVE DEVICE

摘要

A boundary acoustic wave device using SH boundary acoustic waves is provided in which undesired spurious responses are reduced effectively, and which can produce superior resonance characteristics or filter characteristics. The boundary acoustic wave device (1) includes a first medium layer (2), a second medium layer (6) stacked on the first medium layer (2), and an electrode including an interdigital electrode (3) and reflectors (4 and 5). A sound-absorbing layer (7) is provided on the surface of the first medium layer (2) and/or the second medium layer (6) opposite the interface therebetween