Physical Quantity Sensor, Electronic Apparatus, and Vehicle

A physical quantity sensor comprising:

• a substrate;
• a movable body which is opposed to the substrate in a third direction with a gap, and which oscillates around an oscillation axis along a second direction perpendicular to the third direction with respect to the substrate;
• and
• a detection electrode disposed so as to be opposed to the movable body, wherein
• the substrate has a first area through an m-th (m is an integer no smaller than 2) area disposed in sequence from a side close to the oscillation axis,
• the first area through the m-th area are each opposed to the movable body with a gap,
• the detection electrode is disposed so as to straddle the first area through an n-th area (n is an integer no smaller than 2 and fulfills n≤m, and
• in a cross-sectional view from the second direction,
• when setting a first imaginary straight line which is smallest in an angle formed with a first direction perpendicular to the second direction and the third direction out of imaginary straight lines connecting two of end parts located at a far side from the oscillation axis of respective areas of the first area through the n-th area of the detection electrode, and
• a second imaginary straight line extending along a principal surface located at the substrate side of the movable body in a state in which the movable body makes a maximum displacement around the oscillation axis,
• the first imaginary straight line and the second imaginary straight line fail to cross each other in an area between a first normal line which passes the end part of the first area, and which extends in the third direction, and a second normal line which passes the end part in the n-th area, and which extends in the third direction.