A surface acoustic wave device includes a piezoelectric substrate having a first surface on which comb-like electrodes, first pads connected thereto, and a first film are provided. The first film is located so as to surround the comb-like electrodes. A base substrate has a second surface on which second...http://www.google.com/patents/US7227429?utm_source=gb-gplus-sharePatent US7227429 - Surface acoustic wave device and method of fabricating the same
