Patent ID: 7868523

Claim:
An elastic wave device comprising: a piezoelectric substrate; a first multilayer electrically conductive film disposed on the piezoelectric substrate; and a second multilayer electrically conductive film disposed on the piezoelectric substrate; wherein the first multilayer electrically conductive film defines at least an IDT including a plurality of electrode fingers and a first wiring pattern connected to the IDT; the second multilayer electrically conductive film defines at least an electrode pad and a second wiring pattern leading to the electrode pad; at least one contact portion where the second wiring pattern is overlapped with the first wiring pattern is provided; the second multilayer electrically conductive film includes a bottom electrically conductive film including Al or an alloy mainly containing Al; the first multilayer electrically conductive film includes a top electrically conductive film including Ti and an Al-based electrically conductive film including Al or an alloy mainly containing Al and disposed lower than the top electrically conductive film; and the first multilayer electrically conductive film further includes an electrically conductive film that is stacked lower and has a higher density than the Al-based electrically conductive film and includes Pt or an alloy mainly including Pt.