Patent ID: 7924120

Claim:
A piezoelectric resonator comprising: a substrate; and a thin-film section including a first thin-film section supported by the substrate and a second thin-film section acoustically isolated from the substrate, the second thin-film section including a piezoelectric thin film in which first and second electrodes are disposed on respective main surfaces thereof so that a vibration section is defined by a portion in which the first and second electrodes overlap each other in the second thin-film section when viewed through in a film-thickness direction; wherein the thin-film section further includes a heat-radiating film which is in contact with a peripheral edge of at least one of the first and second electrodes defining portions of a periphery of the vibration section, and which extends from the peripheral edge of the at least one of the first and second electrodes to the first thin-film section when viewed through in a film-thickness direction; and the heat-radiating film is made of a different material than the first and second electrodes.