Abstract: According to a physical quantity sensor, a first movable electrode group, a second movable electrode group, a third movable electrode group, and a fourth movable electrode group are arranged in this order along a first direction. In a third direction, a thickness of a second movable electrode in the second movable electrode group and a thickness of a third movable electrode in the third movable electrode group are different from a thickness of a first movable electrode in the first movable electrode group and a thickness of a fourth movable electrode in the fourth movable electrode group. When an imaginary line extending in a second direction from a center of a fixed portion is an axis of symmetry, the first movable electrode is disposed line-symmetrically with the fourth movable electrode, and the second movable electrode is disposed line-symmetrically with the third movable electrode.

Abstract: A physical quantity sensor includes an anchor fixed to a substrate, a support beam, a fixed electrode unit, a movable body, and a damper unit. The fixed electrode unit is provided at the substrate. One end of the support beam is coupled to the anchor. The movable body includes a movable electrode unit and a frame unit. The movable electrode unit includes a movable electrode facing a fixed electrode of the fixed electrode unit. The frame unit couples the movable electrode unit and the other end of the support beam. The damper unit is coupled to the frame unit, is provided in a region surrounded by the support beam and the frame unit, and damps vibration of the frame unit in a first direction.

Abstract: A gyro sensor includes a plurality of beams connected via a turnaround part. A groove is provided on a main surface of at least one beam of the plurality of beams. Wall thicknesses on the main surface of two sidewalls facing each other of the groove in a direction orthogonal to a longitudinal direction of the beam satisfy 0.9?T1/T2?1.1, where T1 is the wall thickness of one sidewall and T2 is the wall thickness of the other sidewall.

Abstract: A gyro sensor includes a plurality of beams connected via a turnaround part. A groove is provided on a main surface of at least one beam of the plurality of beams. Wall thicknesses on the main surface of two sidewalls facing each other of the groove in a direction orthogonal to a longitudinal direction of the beam satisfy 0.9?T1/T2?1.1, where T1 is the wall thickness of one sidewall and T2 is the wall thickness of the other sidewall.

Abstract: A gyro sensor includes a plurality of beams connected via a turnaround part. A groove is provided on a main surface of at least one beam of the plurality of beams. Wall thicknesses on the main surface of two sidewalls facing each other of the groove in a direction orthogonal to a longitudinal direction of the beam satisfy 0.9?T1/T2?1.1, where T1 is the wall thickness of one sidewall and T2 is the wall thickness of the other sidewall.

Abstract: A gyro sensor includes a plurality of beams connected via a turnaround part. A groove is provided on a main surface of at least one beam of the plurality of beams. Wall thicknesses on the main surface of two sidewalls facing each other of the groove in a direction orthogonal to a longitudinal direction of the beam satisfy 0.9?T1/T2?1.1, where T1 is the wall thickness of one sidewall and T2 is the wall thickness of the other sidewall.

Abstract: A physical quantity sensor includes a base substrate, a movable unit which is disposed so as to be displaced with respect to the base substrate, a detecting electrode which is provided on the movable unit side of the base substrate, and is disposed so as to face the movable unit, and a conductive film which is provided on the base substrate side of the movable unit, and is disposed so as to face the detecting electrode, in which a difference in work function between the detecting electrode and the conductive film is 0.4 eV or less.