Patent ID: 11152912

Abstract:
A piezoelectric resonator unit comprises a first enclosure portion that includes a first principal surface portion and a substantially curtain-shaped portion which cooperate to define a first recessed portion. The first principal surface portion has a first flat principal surface and the substantially curtain-shaped portion surrounds the first principal surface when viewed from a normal direction to the first principal surface. A second enclosure portion has a flat second principal surface and cooperates with the first recessed portion to define an enclosure which houses a piezoelectric resonator. A brazing material joins a distal end of the first enclosure portion to the second enclosure portion to hermetically seal the enclosure. An inner peripheral surface of the substantially curtain-shaped portion includes a stepped portion that is defined by adjacent thicker and a thinner portions of the substantially curtain-shaped portion. A surface of the stepped portion is formed of a single material.