Patent ID: 9124239
Filing Date: 2015-09-01
Classification: H01F,H03H

Abstract:
1. An elastic wave device comprising: a piezoelectric substrate; an interdigital transducer (IDT) electrode disposed on an upper surface of the piezoelectric substrate; a wiring electrode disposed on the upper surface of the piezoelectric substrate and connected to the IDT electrode; a first insulator disposed on the upper surface of the piezoelectric substrate, the first insulator sealing the IDT electrode and the wiring electrode, the first insulator including a first resin and a first filler dispersed in the first resin; a first resin layer, distinct from the first insulator, provided on an upper surface of the first insulator; an inductor electrode disposed on an upper surface of the first resin layer; a second insulator disposed on the upper surface of the first resin layer, the second insulator covering the inductor electrode; a terminal electrode disposed on an upper surface of the second insulator; and a connecting electrode passing through the first insulator, the second insulator, and the first resin layer, the connecting electrode electrically connecting the wiring electrode, the terminal electrode, and the inductor electrode, a density of filler in the first resin layer being less than an average density of the first filler in the first insulator.