Head-slider including a low-surface-energy film that prevents lubricant accumulation, head-arm assembly including the head-slider, and hard-disk drive including the head-arm assembly

A head-arm assembly comprising:

• a suspension arm;
• and
• a head-slider attached to said suspension arm, said head-slider configured to receive an air-stream produced by rotation of a magnetic-recording disk and configured to fly in proximity with a recording surface of said magnetic-recording disk, said head-slider comprising:
• a trailing edge on an outflow side of said air-stream;
• and
• a disk-facing surface, said disk-facing surface configured to face said recording surface of said magnetic-recording disk;
• wherein a low-surface-energy film is disposed in a pattern and only on a portion of a trailing-edge side of said head-slider that is in contact with a boundary between said trailing edge and said disk-facing surface, said low-surface-energy film having a lower surface energy than other portions of said trailing-edge side where said low-surface-energy film is not disposed.

A hard-disk drive comprising:

• a magnetic-recording disk;
• and
• a head-arm assembly comprising:
• a suspension arm;
• and
• a head-slider attached to said suspension arm, said head-slider configured to receive an air-stream produced by rotation of said magnetic-recording disk and configured to fly in proximity with a recording surface of said magnetic-recording disk, said head-slider comprising:
• a trailing edge on an outflow side of said air-stream;
• and
• a disk-facing surface, said disk-facing surface configured to face said recording surface of said magnetic-recording disk;
• wherein a low-surface-energy film is disposed in a pattern and only on a portion of a trailing-edge side of said head-slider that is in contact with a boundary between said trailing edge and said disk-facing surface, said low-surface-energy film having a lower surface energy than other portions of said trailing-edge side where said low-surface-energy film is not disposed.