| 摘要 |
In an elastic wave device, a plurality of elastic wave elements that include IDT electrodes are provided on a piezoelectric substrate, and a support layer that surrounds the elastic wave elements is provided on the piezoelectric substrate to define hollow portions in which the elastic wave elements are located. A cover member is stacked on the support layer, so that the hollow portions, in which the elastic wave elements are located, are provided, and the support layer includes a first support layer and a second support layer. The first support layer extends along an outer peripheral edge of the piezoelectric substrate, and the second support layer is located in a region surrounded by the first support layer and disposed around the elastic wave elements so as to have the hollow portions, in which the elastic wave elements are located. A hollow path is provided between the first support layer and the second support layer and arranged to allow communication between at least two of the hollow portions. |
