Elastic wave filter apparatus

An elastic wave filter apparatus comprising:

• a device substrate including a piezoelectric layer, the device substrate including a first main surface and a second main surface that face each other;
• at least two excitation electrodes provided on the first main surface of the device substrate, the at least two excitation electrodes defining an elastic wave filter device;
• a first electrode land provided on the first main surface of the device substrate and connected to one of the at least two excitation electrodes, the first electrode land being connected to a signal potential;
• a plurality of second electrode lands provided on the first main surface of the device substrate, the plurality of second electrode lands being electrically connected to a ground potential, at least one of the plurality of second electrode lands electrically connected to the at least two excitation electrodes, and the at least one of the plurality of second electrode lands is provided in an area between the at least two excitation electrodes;
• a signal terminal and a plurality of metal members provided on the second main surface of the device substrate, the signal terminal being connected to the signal potential, the plurality of metal members being connected to the ground potential;
• a first connection electrode that connects the first electrode land and the signal terminal;
• a second connection electrode that electrically connects the at least one of the plurality of second electrode lands and at least one of the plurality of metal members;
• wherein
• the at least one of the plurality of metal members is electrically connected to the at least two excitation electrodes through the second connection electrode and the at least one of the plurality of second electrode lands, and the at least one of the plurality of metal members overlaps at least a portion of each of the at least two excitation electrodes across the device substrate.