Arrangement for the elimination of crosstalk between data and servo heads

Claim 1

A disk drive comprising a disk having an upper and lower surface on which is recorded servo information and data on the upper surface, and an arm assembly located above said disk, said arm assembly comprising: a read/write data head for reading data from and writing data onto a data portion of said disk, a composite servo head positioned on said arm to read servo information from a servo portion of the disk surface comprising a slider body with a ferrite core mounted on said body, said ferrite core having a bottom facing the upper surface of said disk, said core having a coil mounting portion for supporting, a coil wound on said core, a two-dimensional mumetal sheet which is cut and bent to form an envelope which surrounds only the top, two sides, and trailing end of the coil and portions of said ferrite core to shield said core and coil to minimize noise picked up by said servo coil from the data head, and a mumetal plate shield between said data head and electrical cable which passes over said data head to connect said servo head with said disk drive.