Disk clamp and hard disk drive having the same

A hard disk drive comprising:

• a disk on which data is recorded and reproduced;
• a spindle motor to rotate the disk;
• and
• a disk clamp to fix the disk to a hub of the spindle motor, the disk clamp comprising:
• a coupling hole formed at a center of the disk clamp, in which a clamping screw is inserted;
• at least one through hole formed outside the coupling hole;
• and
• a pressing portion provided at an outer circumferential side of the disk clamp to contact and press the disk,
• wherein a particular area around the at least one through hole that is disposed away from the at least one through hole has a sectional thickness thinner than a predetermined area that is adjacent to the at least one through hole to prevent stress distribution generated at a contact surface between the pressing portion and the disk from being irregular due to the at least one through hole.

A disk clamp to fasten a disk to a hub of a disk drive, the disk clamp comprising:

• a coupling hole formed at a center of the disk clamp to receive the hub;
• at least one through hole formed between an outer circumferential side of the disk clamp and the coupling hole;
• and
• a pressing portion formed at the outer circumferential side of the disk clamp to contact a surface of the disk such that a thickness of a first sectional area of the disk clamp adjacent to the at least one through hole is greater than a thickness of a second sectional area of the disk clamp spaced apart from the at least one through hole.

A hard disk drive, comprising:

• a disk clamp to fasten a disk to a hub of the hard disk drive, the disk clamp comprising:
• a coupling hole formed at a center of the disk clamp to receive the hub;
• at least one through hole formed between an outer circumferential side of the disk clamp and the coupling hole;
• and
• a pressing portion formed at the outer circumferential side of the disk clamp to contact a surface of the disk such that a thickness of a first sectional area of the disk clamp adjacent to the at least one through hole is greater than a thickness of a second sectional area of the disk clamp spaced apart from the at least one through hole.