High-density disk drive having a cover portion which protects a light weight head carriage from electromagnetic noise

A high-density disk drive for driving a large-capacity flexible disk, said disk drive comprising:

• a carriage on which a magnetic head is mounted;
• a linear motor coupled to said carriage and moving said carriage in a predetermined radial direction relative to a large-capacity flexible disk received in said disk drive;
• a cover arranged to cover said carriage, said magnetic head, said linear motor and said large-capacity flexible disk received in said disk drive, said cover including a main electromagnetic shielding plate arranged as at least an upper member of said cover, said main electromagnetic shielding plate being dimensioned so as to shield at least a whole upper surface of said large-capacity flexible disk, said carriage and said linear motor from electromagnetic noise directed toward said flexible disk, said carriage and said linear motor from an upper side of said disk drive;
• and
• an auxiliary electromagnetic shielding plate attached to said main electromagnetic shielding plate, said auxiliary electromagnetic shielding plate being smaller in size than said main electromagnetic shielding plate and being arranged and located to further shield said magnetic head from electromagnetic noise directed toward said magnetic head from an upper side of said disk drive, said auxiliary electromagnetic shielding plate shielding a smaller area than said main electromagnetic shielding plate.