Hard disk drive

1. A hard disk drive (HDD) comprising:

a base comprising a voice coil motor (VCM) which drives an actuator;

a cover combined with an upper surface of the base; and

a magnetic leakage flux reducer adjacent to the VCM to reduce a magnetic leakage flux leaked from the VCM.

2. The HDD of claim 1 , wherein the cover is formed of a nonferrous material.

3. The HDD of claim 2 , wherein the cover is formed of an aluminum material.

4. The HDD of claim 1 , wherein the magnetic leakage flux reducer is formed of a steel material,

5. The HDD of claim 1 , wherein the VCM comprises:

a bobbin which forms an end of a head stack assembly (HSA) pivoting on a pivot shaft and on which a voice coil is turned;

a pair of magnets which are disposed under and above the bobbin so that the bobbin is positioned between the magnets, to have different magnetic poles so as to generate a magnetic field which interacts with an electric field generated by the VCM; and

upper and lower motor casings which are combined with the magnets,

wherein the magnetic leakage flux reducer is a laminate plate which is stacked on an upper surface of the upper motor casing.

6. The HDD of claim 5 , wherein the magnetic leakage flux reducer is substantially formed in the same shape as the upper surface of the upper motor casing.

7. The HDD of claim 5 , wherein the magnetic leakage flux reducer is adhered onto an upper surface of the VCM.

8. The HDD of claim 1 , wherein the magnetic leakage flux reducer is combined with an inner surface of the cover.

9. The HDD of claim 8 , wherein the magnetic leakage flux reducer is substantially formed in the same shape as the upper surface of the upper motor casing.

10. The HDD of claim 1 , wherein the cover and the magnetic leakage flux reducer are formed into a single body using a double molding method.

11. The HDD of claim 1 , wherein the HDD is a small form factor HDD (SFF HDD) having a diameter of 1.8 inch or less.

12. A hard disk drive (HDD) comprising:

a base including a voice coil motor (VCM) which drives an actuator; and

a cover connected to an upper surface of the base, the cover including a magnetic leakage flux reducer molded together with the cover at a position adjacent to the VCM to prevent a magnetic flux from leaking from the VCM.

13. The HDD of claim 12 , wherein the VCM is substantially formed of the same shape as the upper surface of the VCM.

14. The HDD of claim 12 , wherein the magnetic leakage flux reducer is molded in a first mold and then placed in a second mold to be molded again with molding of the cover.

15. The HDD of claim 14 , wherein the magnetic leakage flux reducer is molded of a first material and the cover is molded of a second material different from the first material.

16. A hard disk drive (HDD) comprising:

a base including a voice coil motor (VCM) which drives an actuator; and

a cover connected to an upper surface of the base, the cover including a first material of light weight to connect with the base and a second material disposed at a position adjacent to the VCM to prevent a magnetic flux from leaking from the VCM.