Patent ID: 9628047
Date: 2017-04-18
CPC Classifications: H01L,H03H

Claim:
1. An elastic wave device comprising: a substrate including a single crystal piezoelectric material; an interdigital transducer (IDT) electrode provided on an upper surface of the substrate; a first wiring electrode provided on the upper surface of the substrate and connected to the IDT electrode, the first wiring electrode having a first region and a second region; a dielectric film disposed over the upper surface of the substrate, the dielectric film being disposed such that it does not extend over and cover the first wiring electrode in the first region, and being disposed over and covering the first wiring electrode in the second region, the first wiring electrode including a cutout in the second region; and a second wiring electrode disposed over and covering an upper surface of the first wiring electrode in the first region, and disposed over and covering an upper surface of the dielectric film in the second region above the substrate, a thickness of thinnest portions of the second wiring electrode extending from an edge of the dielectric film to an upper surface of the second wiring electrode around a location where the first region and the second region are proximate to each other being less than a thickness of the second wiring electrode in the second region.