Semiconductor capacitive acceleration sensor

Details Semiconductor capacitive acceleration sensor Semiconductor capacitive acceleration sensor

1994-07-27

1997-09-09

Williams, Hezron E.

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

7351418, G01P 15125

Patent

active

056659156

ABSTRACT:
A semiconductor capacitive acceleration sensor is configured so that it can be constructed in a small size, it has a high detection sensitivity, and the detection output characteristic is linear. The sensor comprises a semiconductor substrate 1; supporters 21A to 21D each of which is made of a conductive semiconductor, and which are disposed on the upper face of the semiconductor substrate 1 through an insulating layer 1A so as to be placed at positions corresponding to corners of a quadrilateral; beams 26A to 26D which respectively have ends connected with the supporters, which coincide with each other when the beams are rotated, and which elongate in the side directions of the quadrilateral; a movable electrode 23 which has a quadrilateral shape, and which is disposed so as to be separated from the beams by a predetermined distance; connectors 27A to 27D which respectively connect the movable electrode 23 with the beams; and a stationary electrode 31 which is disposed so as to be separated from the lower face of the movable electrode 23 by a predetermined distance.

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