Patent ID: 8072118

Claim:
A surface acoustic wave device comprising: a piezoelectric substrate including a first main surface and a second main surface that face each other; an electrode arranged on the first main surface of the piezoelectric substrate so as to excite surface acoustic waves and to define a vibrating portion; a plurality of electrode pads arranged on the first main surface of the piezoelectric substrate and electrically connected to the electrode of the vibrating portion with a plurality of wiring lines disposed therebetween; a three-dimensional wiring portion at which two wiring lines of the plurality of wiring lines intersect each other with an insulating layer interposed therebetween; a supporting member arranged on the first main surface of the piezoelectric substrate, having a thickness greater than a thickness of the electrode of the vibrating portion, and including a first opening that encloses the vibrating portion; and a cover member arranged on the supporting member so as to seal the first opening; wherein the supporting member and the insulating layer are made of different materials; the supporting member further includes a second opening that encloses the three-dimensional wiring portion; and the second opening is sealed by the cover member.