Patent ID: 8683864

Claim:
A micro electro mechanical system, formed on a first semiconductor chip, comprising: (a) a first fixed portion, (b) an elastically deformable first beam, one end of which is connected to the first fixed portion, (c) a second fixed portion, (d) an elastically deformable second beam, one end of which is connected to the second fixed portion, and (e) a displaceable movable body connected to the other end of the first beam and the other end of the second beam, wherein, when a stress as a distortion acting from a center of the first semiconductor chip toward an outside is applied to the first fixed portion and the second fixed portion, and the first fixed portion and the second fixed portion are displaced in the same direction, the stress causes a spring constant of the first beam to increase as compared with that when the first fixed portion is not displaced, and causes a spring constant of the second beam to decrease as compared with that when the second fixed portion is not displaced.