Patent ID: 6257058
Filing Date: 2001-07-10
Classification: G01C

Abstract:
A silicon gyroscope comprising a vibrator, a base plate, horizontal electrodes, and vertical electrodes, said vibrator being made from a single crystal silicon and having a base portion, with three elastic arms extending from said base portion and separated by two notches, and said base plate being formed from glass, wherein:part of a root section of the base portion of said vibrator is fixed to said base plate;said horizontal electrodes are formed of a silicon wafer, and are disposed between said elastic arms and on outer sides of said elastic, said horizontal electrodes being orthogonal to a plane formed by the layout of said elastic arms and positioned adjacent to said elastic arms in such a manner that part of said horizontal electrodes contact said base plate;said vertical electrodes are formed of a metallic film, and include two electrodes which are disposed in a groove formed on an upper surface of said base plate and to which alternating voltages having phases inverted to each other are applicable by being parallel to the layout plane of the elastic arms and adjacent to said elastic arms; andsaid horizontal electrodes and said vertical electrodes being disposed in directions orthogonal to each other.