Patent ID: 7982364

Claim:
A surface acoustic wave device having an outer peripheral portion in a circumferential direction thereof, said surface acoustic wave device comprising: a piezoelectric substrate including a main surface with a comb electrode and a pad electrode disposed on the main surface; a lid disposed opposite the main surface of the piezoelectric substrate, the lid including a first surface facing the main surface of the piezoelectric substrate and a second surface on a side opposite the first surface, and including an external terminal disposed on the second surface; a connection electrode that electrically connects the pad electrode and the external terminal; and an insulator interposed between at least one of the main surface of the piezoelectric substrate and the pad electrode and the lid, wherein only the piezoelectric substrate, the insulator, and the lid form a laminated portion at at least a portion of the outer peripheral portion of the surface acoustic wave device, and the insulator has an elasticity modulus between an elasticity modulus of the piezoelectric substrate and an elasticity modulus of the lid.