US 7,068,465 B2 · Magnetic shield for the drive housing of a recording drive

Abstract

A drive housing (22) for shielding a storage disk (13) and a data transducer (48) of a disk drive (10) from external magnetic fields includes a housing shield (24) positioned near the storage disk (13). The housing shield (24) includes a base shield portion (60) and a cover shield portion (64) that are positioned substantially parallel to the storage disk (13). The housing shield (24) also includes one or more wall shield portions (62) oriented substantially perpendicular to the storage disk (13). The housing shield (24) is uniquely sized, shaped and formed from material to have an attenuation of field of at least approximately 10 dB. With this design, the influence of external magnetic fields is reduced and the incidence of damage to data stored on the storage disk (13) is reduced. Additionally, the housing shield (24) enhances the accurate transfer of information between the storage disk (13) and the data transducer (48) of the disk drive (10).

Claims30

Dependent claims

A disk drive comprising:

a storage disk having a substantially planar disk surface;
and
a drive housing that retains the storage disk, the drive housing having a housing thickness that is measured in a first direction, the drive housing including a shield portion having a shield thickness measured in the first direction that is substantially similar to the housing thickness, the shield portion being formed from a material having a relative permeability that provides an attenuation of field of at least approximately 25 dB in a direction substantially perpendicular to the disk surface to at least partially shield the storage disk from an external magnetic field.

Dependencies are inferred from the claim text.

Magnetic shield for the drive housing of a recording drive

Life of this patent

Magnetic shield for the drive housing of a recording drive

Life of this patent

Abstract

Claims30