Patent ID: 8067879
Filing Date: 2011-11-29
Classification: H01L,H03H

Abstract:
1. A piezoelectric device comprising: a piezoelectric substrate; a conductive pattern provided on one main surface of the piezoelectric substrate and including an interdigital transducer electrode; a supporting layer arranged on the one main surface of the piezoelectric substrate so as to surround the periphery of an interdigital transducer-forming region in which the interdigital transducer electrode is provided and having a thickness greater than that of the interdigital transducer electrode; and a cover layer arranged on the supporting layer and covering the IDT-forming region; wherein the supporting layer includes removed sections provided at a plurality of positions at least in a region close to the interdigital transducer-forming region, the removed sections being obtained by partially removing a portion of the supporting layer to be bonded to the one main surface of the piezoelectric substrate.