Electronic component

An electronic component comprising:

• a metal cap including a first main surface having a flat plate-like shape with an inner surface and an annular portion that surrounds the inner surface when viewed in a direction perpendicular to the first main surface, such that the first main surface and the annular portion form a recess;
• a substrate having a flat plate-like shape with a main surface that hermetically seals the recess;
• a joining member that joins the metal cap to the substrate;
• and
• an element disposed in the recess,
• wherein the annular portion comprises an outer peripheral surface with a band-shaped region between the inner surface and the main surface of the substrate,
• wherein a groove is disposed in the band-shaped region and extends in a circumferential direction of the annular portion of the metal cap,
• wherein the band-shaped region of the annular portion has a thickness in a direction parallel to the first main surface that is thinner where the groove is disposed than where the groove is not disposed in the band-shaped region,
• wherein the metal cap includes a flange that projects from an opening edge of the annular portion in a direction along the main surface of the substrate, and
• wherein a portion of the band-shaped region extends from the flange towards the first main surface, such that the portion of the band-shaped region extends between the flange and the groove.