Patent ID: 8015875

Claim:
A sensor device, comprising: a dead-weight portion and a frame portion disposed so as to surround the dead-weight portion; a supporting portion provided at the frame portion via a first insulating layer; a mass portion provided at the dead-weight portion via a second insulating layer; a beam portion connecting the supporting portion and the mass portion; a first concave portion partitioned by a face of the supporting portion facing an upper face of the frame portion, a face of the frame portion facing a bottom face of the supporting portion, and a side face of the first insulating layer at a side of the dead-weight portion; a second concave portion partitioned by a face of the mass portion facing an upper face of the dead-weight portion, a face of the dead-weight portion facing a bottom face of the mass portion, and a side face of the second insulating layer at a side of the frame portion, wherein a depth of the first or second concave portion is 3.3% or more or 5.0% or less of a width of the frame portion; and chamfered portions forming an angle of 40 to 60 degrees with the upper face of the frame portion and the upper face of the dead-weight portion at an edge of the upper face of the frame portion at the side of the dead-weight portion and at an edge of the upper face of the dead-weight portion.