Patent ID: 8723624
Filing Date: 2014-05-13
Classification: H01L,H03H

Abstract:
1. An elastic wave device comprising: a piezoelectric substrate; at least one IDT electrode provided on the piezoelectric substrate; a first wiring portion electrically connected to the at least one IDT electrode and provided on the piezoelectric substrate; a first insulating film composed of one of SiO a second insulating film provided on the first insulating film; and a second wiring portion arranged on the first insulating film so as to extend into the at least one through-hole of the first insulating film and to be electrically connected to the first wiring portion inside the at least one through-holes; wherein the second insulating film is arranged over all portions of the piezoelectric substrate where the at least one IDT electrode is disposed, and the second wiring portion is arranged over a portion of the piezoelectric substrate other than all portions of the piezoelectric substrate where the at least one IDT electrode is disposed.