Baseplate with recessed region in a hard-disk drive (HDD)
Approaches for a hard-disk drive (HDD) baseplate comprising a recessed region that provides additional clearance for a disk. The protective enclosure of the HDD comprises a baseplate. The surface of the baseplate, which opposes a magnetic-recording disk, comprises a recessed region near the outer diameter (OD) of the magnetic-recording disk. The recessed region prevents the disk from being damaged through inadvertent physical contact with the baseplate, which may arise when the HDD receives a mechanical shock. The recessed region may be designed to minimize the damage to the disk if physical contact between the disk and the baseplate does occur. The recessed region may have a variety of shapes, such as a circular indentation or one or more non-contiguous regions in the baseplate where physical contact between the disk and the baseplate is deemed likely to occur.
1. A hard-disk drive, comprising:
an enclosure comprising a baseplate;
a magnetic read/write head;
a magnetic-recording disk rotatably mounted on a spindle;
a drive motor having a motor shaft attached to the spindle for rotating the magnetic-recording disk; and
a voice-coil motor configured to move the magnetic read/write head to access portions of the magnetic-recording disk,
wherein the surface of the baseplate which opposes the magnetic-recording disk comprises a recessed region near the outer diameter (OD) of the magnetic-recording disk, and wherein the recessed region increases clearance between the magnetic-recording disk and the baseplate.
2. The hard-disk drive of claim 1 , wherein the recessed region is a circular indentation aligned with the outer diameter (OD) of the magnetic-recording disk.
3. The hard-disk drive of claim 1 , wherein the recessed region is an indentation in the baseplate that corresponds to a segment of the circular shape of the magnetic-recording disk.
4. The hard-disk drive of claim 1 , wherein the magnetic-recording disk is constructed using aluminum.
5. The hard-disk drive of claim 1 , wherein the recessed region comprises at least one right angle.
6. The hard-disk drive of claim 1 , wherein the recessed region comprises at least obtuse angle.
7. The hard-disk drive of claim 1 , wherein the recessed region comprises smooth, curved surface without any angles.
8. The hard-disk drive of claim 1 , wherein the structure and placement of the recessed region is designed so that only a non-data zone of the magnetic-recording disk can make physical contact with the recessed region.
9. The hard-disk drive of claim 1 , wherein the recessed region has an angled portion having a surface that is at an oblique angle to the surface of magnetic-recording disk which opposes the baseplate, and wherein the magnetic-recording disk makes contact with the surface of the angular portion upon a deformation of the magnetic-recording disk towards the baseplate.
10. The hard-disk drive of claim 1 , wherein the recessed region comprises dampening material at a position where the magnetic-recording disk makes contact with the recessed portion upon a deformation of the magnetic-recording disk towards the baseplate.
11. A baseplate for use in a rotating disk drive, comprising:
a surface of the baseplate which opposes a recording disk; and
a recessed region near the outer diameter (OD) of the recording disk, and
wherein the recessed region increases clearance between the recording disk and the baseplate.
12. The baseplate of claim 1 , wherein the recessed region is a circular indentation aligned with the outer diameter (OD) of the recording disk.
13. The baseplate of claim 11 , wherein the recessed region is an indentation in the baseplate that corresponds to a segment of the circular shape of the recording disk.
14. The baseplate of claim 11 , wherein the recording disk is constructed using aluminum.
15. The baseplate of claim 11 , wherein the recessed region comprises at least one right angle.
16. The baseplate of claim 11 , wherein the recessed region comprises at least obtuse angle.
17. The baseplate of claim 11 , wherein the recessed region comprises smooth, curved surface without any angles.
18. The baseplate of claim 11 , wherein the structure and placement of the recessed region is designed so that only a non-data zone of the recording disk can make physical contact with the recessed region.
19. The baseplate of claim 11 , wherein the recessed region has an angled portion having a surface that is at an oblique angle to the surface of recording disk which opposes the baseplate, and wherein the recording disk makes contact with the surface of the angular portion upon a deformation of the recording disk towards the baseplate.
20. The baseplate of claim 11 , wherein the recessed region comprises dampening material at a position where the recording disk makes contact with the recessed portion upon a deformation of the recording disk towards the baseplate.