Patent ID: 7697227

Claim:
A hard disk drive comprising: a disk pack including a disk having upper and lower surfaces at least one of which is a data recording surface, and a spindle motor to which the disk is mounted; a base to which the disk pack is mounted, the base having an upper surface over which the disk pack is disposed; a cover covering an upper surface of the base; and a respective filter disposed adjacent each of at least one of the upper and lower surfaces of the disk, each said filter including an absorbent layer extending over least an inner peripheral region of the disk in a crosswise direction of the disk, wherein by the filter will absorb particles scattered from the inner peripheral region when the disk is rotated; wherein said respective filter disposed adjacent each of at least one of the upper and lower surface of the disk comprises a first filter disposed above the upper surface of the disk and a second filter disposed below the lower surface of the disk; wherein the spindle motor has a hub on which the disk is mounted, and the absorbent layer of the second filter is attached directly to both the base and to the spindle motor hub.