Patent ID: 7356922

Claim:
A process for fabricating a rate gyroscope and accelerometer multisensor having an inner magnetically-suspended spinning wheel rotor, with outer stator portions adjacent both faces of the rotor, comprising: a. providing three substrates of magnetic material, each having opposed flat faces, a first substrate being used to form the portion comprising the rotor and the other two being used to form the outer stator portions; b. creating a series of spaced concentric grooves in the central region of both faces of the first substrate; c. creating outside of the grooves on both faces of the first substrate a series of spaced spiral grooves; d. creating a hole through the thickness of the first substrate proximate the center of the spiral grooves; e. filling the holes in the first substrate with magnetic material; f. creating in the spiral grooves in the faces of the first substrate a conductor that is insulated from the first substrate; g. creating a central wheel in the first substrate, the wheel carrying the spaced concentric grooves and defining along its edge a series of spaced teeth; h. creating on one active face of each of the other two substrates a series of spaced serpentine grooves located around the central region; i. creating on the same face of each of the other two substrates and outside of the serpentine grooves a series of generally radial grooves; j. creating in the serpentine grooves a conductor that is insulated from the substrate; k. creating in the generally radial grooves a magnetic path that is insulated from the substrate; and l. bonding the active faces of the two outer substrates against the first substrate such that the outer end of each magnetic path overlays said hole in the first substrate proximate the center of a spiral groove, to create the stator of an axial air gap reluctance motor.