Magnetic disk drive slider having a trailing edge extended rear surface
View Patent ↗A head-slider which is configured to fly above a magnetic-recording disk. The head-slider includes a disk-facing side, which faces the magnetic-recording disk. The disk-facing side includes a plurality of surfaces including at least: a step bearing surface; a rail surface, which protrudes toward the magnetic-recording disk and is configured to exert a positive pressure; a deep-recessed surface, which is formed deeper than the step bearing surface and is configured to exert a negative pressure; an extended lateral surface, which is formed at substantially a same depth as the step bearing surface and disposed outside the deep-recessed surface in a width direction of the head-slider; and, an extended rear surface, which is formed at substantially the same depth as the step bearing surface and disposed at a trailing edge of the head-slider, and contiguous with the extended lateral surface.
1. A head-slider which is configured to fly above a magnetic-recording disk, said head-slider comprising:
a disk-facing side, which faces said magnetic-recording disk, said disk-facing side comprising a plurality of surfaces comprising at least:
a step bearing surface;
a rail surface, which protrudes toward said magnetic-recording disk and is configured to exert a positive pressure;
a deep-recessed surface, which is formed deeper than said step bearing surface and is configured to exert a negative pressure;
an extended lateral surface, which is formed at substantially a same depth as said step bearing surface and disposed outside said deep-recessed surface in a width direction of said head-slider; and
an extended rear surface, which is formed at substantially said same depth as said step bearing surface and disposed at a trailing edge of said head-slider, and contiguous with said extended lateral surface, wherein a leading-edge side of said extended rear surface of said disk-facing side comprises a plurality of surfaces that are formed deeper than said extended rear surface and progressively deeper toward said leading-edge side.
2. The head-slider of claim 1 , wherein said trailing edge of said disk-facing side comprises a trailing-edge rail surface, said trailing-edge rail surface comprising a magnetic-recording head configured to read data from, and to write data to, said magnetic-recording disk; and
said extended rear surface is extended in said width direction from a lateral end of said trailing-edge rail surface.
3. The head-slider of claim 1 , wherein said deep-recessed surface is surrounded by a surface that is configured to protrude towards a recording surface of said magnetic-recording disk and comprises said extended lateral surface and said extended rear surface.
4. The head-slider of claim 1 , wherein a leading-edge side of said extended rear surface of said disk-facing side comprises an intermediate step surface, which is formed at an intermediate depth between said extended rear surface and said deep-recessed surface.
5. The head-slider of claim 1 , wherein said extended lateral surface is configured to be disposed at a depth of 100 nm to 300 nm from a recording surface of said magnetic-recording disk and is disposed outside of a deeper surface in said width direction.
6. The head-slider of claim 1 , wherein said extended rear surface is configured to be disposed at a depth of 100 nm to 300 nm from a recording surface of said magnetic-recording disk, is disposed at said trailing edge, and is contiguous with said extended lateral surface.
7. A head-arm assembly comprising:
a head-slider which is configured to fly above a magnetic-recording disk, said head-slider comprising:
a disk-facing side, which faces said magnetic-recording disk, said disk-facing side comprising a plurality of surfaces comprising at least:
a step bearing surface;
a rail surface, which protrudes toward said magnetic-recording disk and is configured to exert a positive pressure;
a deep-recessed surface, which is formed deeper than said step bearing surface and is configured to exert a negative pressure;
an extended lateral surface, which is formed at substantially a same depth as said step bearing surface and disposed outside said deep-recessed surface in a width direction of head-slider; and
an extended rear surface, which is formed at substantially said same depth as said step bearing surface and disposed at a trailing edge of said head-slider, and contiguous with said extended lateral surface, wherein a leading-edge side of said extended rear surface of said disk-facing side comprises a plurality of surfaces that are formed deeper than said extended rear surface and progressively deeper toward said leading-edge side.
8. The head-arm assembly of claim 7 , wherein said trailing edge of said disk-facing side comprises a trailing-edge rail surface, said trailing-edge rail surface comprising a magnetic-recording head configured to read data from, and to write data to, said magnetic-recording disk; and
said extended rear surface is extended in said width direction from a lateral end of said trailing-edge rail surface.
9. The head-arm assembly of claim 7 , wherein said deep-recessed surface is surrounded by a surface that is configured to protrude towards a recording surface of said magnetic-recording disk and comprises said extended lateral surface and said extended rear surface.
10. The head-arm assembly of claim 7 , wherein a leading-edge side of said extended rear surface of said disk-facing side comprises an intermediate step surface, which is formed at an intermediate depth between said extended rear surface and said deep-recessed surface.
11. The head-arm assembly of claim 7 , wherein said extended lateral surface is configured to be disposed at a depth of 100 nm to 300 nm from a recording surface of said magnetic-recording disk and is disposed outside of a deeper surface in said width direction.
12. The head-arm assembly of claim 7 , wherein said extended rear surface is configured to be disposed at a depth of 100 nm to 300 nm from a recording surface of said magnetic-recording disk, is disposed at said trailing edge, and is contiguous with said extended lateral surface.
13. A hard-disk drive comprising:
a head-arm assembly comprising:
a head-slider which is configured to fly above a magnetic-recording disk, said head-slider comprising:
a disk-facing side, which faces said magnetic-recording disk, said disk-facing side comprising a plurality of surfaces comprising at least:
a step bearing surface;
a rail surface, which protrudes toward said magnetic-recording disk and is configured to exert a positive pressure;
a deep-recessed surface, which is formed deeper than said step bearing surface and is configured to exert a negative pressure;
an extended lateral surface, which is formed at substantially a same depth as said step bearing surface and disposed outside said deep-recessed surface in a width direction of head-slider; and
an extended rear surface, which is formed at substantially said same depth as said step bearing surface and disposed at a trailing edge of said head-slider, and contiguous with said extended lateral surface, wherein a leading-edge side of said extended rear surface of said disk-facing side comprises a plurality of surfaces that are formed deeper than said extended rear surface and progressively deeper toward said leading-edge side.
14. The hard-disk drive of claim 13 , wherein said trailing edge of said disk-facing side comprises a trailing-edge rail surface, said trailing-edge rail surface comprising a magnetic-recording head configured to read data from, and to write data to, said magnetic-recording disk; and
said extended rear surface is extended in said width direction from a lateral end of said trailing-edge rail surface.
15. The hard-disk drive of claim 13 , wherein said deep-recessed surface is surrounded by a surface that is configured to protrude towards a recording surface of said magnetic-recording disk and comprises said extended lateral surface and said extended rear surface.
16. The hard-disk drive of claim 13 , wherein a leading-edge side of said extended rear surface of said disk-facing side comprises an intermediate step surface, which is formed at an intermediate depth between said extended rear surface and said deep-recessed surface.
17. The hard-disk drive of claim 13 , wherein said extended rear surface is configured to be disposed at a depth of 100 nm to 300 nm from a recording surface of said magnetic-recording disk, is disposed at said trailing edge, and is contiguous with said extended lateral surface.