Patent ID: 6856067

Claim:
A device for levitating a disk, comprising: three bottom electrodes situated below the disk, the three bottom electrodes situated equidistantly around a bottom circle; three top electrodes situated above the disk and opposite the three bottom electrodes, the three top electrodes situated equidistantly around a top circle; two bottom reference electrodes situated below the disk, a first bottom reference electrode forming a bottom inner circle radially inwards of the set of three bottom electrodes, a second bottom reference electrode forming a bottom outer circle radially outwards of the set of three bottom electrodes; two top reference electrodes situated above the disk, a first top reference electrode forming a top inner circle radially inwards of the set of three top electrodes, a second top reference electrode forming a top outer circle radially outwards of the set of three top electrodes; and at least one drive circuit for driving the three bottom electrodes, the three top electrodes, the two bottom reference electrodes, and the two top reference electrodes.