Patent ID: 8151642

Claim:
A semiconductor device including: a semiconductor substrate; and an MEMS sensor provided on the semiconductor substrate, wherein the MEMS sensor comprises: a first electrode having a plurality of first interdigital portions aligned in a prescribed direction X at an interval; a second electrode, having a plurality of second interdigital portions aligned in the direction X at an interval, so arranged that the second interdigital portions are opposed to the first interdigital portions in the direction X respectively; a third electrode having a plurality of third interdigital portions aligned in a direction Y orthogonal to the direction X at an interval; a fourth electrode, having a plurality of fourth interdigital portions aligned in the direction Y at an interval, so arranged that the fourth interdigital portions are opposed to the third interdigital portions in the direction Y respectively; a fifth electrode opposed to the first electrode, the second electrode, the third electrode and the fourth electrode in a direction Z orthogonal to the direction X and the direction Y; an X-directional capacitor being formed from each first interdigital portion and each respective second interdigital portion opposed thereto in the direction X; a Y-directional capacitor being formed from each third interdigital portion and each respective fourth interdigital portion opposed thereto in the direction Y; and a Z-directional capacitor being formed from each of vibratory ones of the first to fourth electrodes, and the fifth electrode, the fifth electrode being opposed to the first to fourth electrodes in the direction Z.