Recording/producing separated type magnetic head
AssigneeHitachi Global Storage Technologies Japan, Ltd.
InventorsShigekazu Ohtomo, Hiroshi Fukui, Nobuo Yoshida
Life of this patent
Estimating the term…
Abstract
A protrusion 24 having a width Lpfw equal to or somewhat larger than a track width Tw and protruding to the air bearing surface is provided on a lower magnetic pole 5 or lower magnetic pole front end layer 19. The lower magnetic pole 5 or the lower magnetic pole front end layer 19 other than the protrusion is retracted by Lpfd from the air bearing surface 15. With the constitution, since the upper end surface 23 of the lower magnetic pole 5 or the lower magnetic pole to end layer 19 that generates the leakage magnetic fields in the off-track portions is not exposed to the air bearing surface 15, the leakage magnetic fields Hxz in the off-track portions can be decreased greatly.
Claims18
A recording/reproducing separated type magnetic head comprising:
- a reproducing head having a reproducing element, said reproducing element being disposed by way of an insulating layer formed between a lower magnetic shield disposed on a substrate and an upper magnetic shield;
- and
- a recording head including a lower magnetic pole disposed adjacent to said reproducing head and formed with a protrusion at one end of the lower magnetic pole, an upper magnetic pole disposed by way of a magnetic gap layer over the lower magnetic pole, said upper magnetic pole providing a magnetic gap at one end portion including the protrusion, said upper magnetic pole being connected with the lower magnetic pole on the side opposite to the magnetic gap, and conductor coils disposed by way of another insulating layer formed between the upper magnetic pole and the lower magnetic pole.
A recording/reproducing separated type magnetic head comprising:
- a reproducing head having a reproducing element, said reproducing element being disposed by way of an insulating layer formed between a lower magnetic shield disposed on a substrate and an upper magnetic shield;
- and
- a recording head including a lower magnetic pole disposed adjacent to said reproducing head and formed with a protrusion at one end of the lower magnetic pole with opposite corners in an upper portion of said protrusion being removed, an upper magnetic pole disposed by way of a magnetic gap layer over the lower magnetic pole, said upper magnetic pole providing a magnetic gap at one end portion including the protrusion, said upper magnetic pole being connected with the lower magnetic pole on the side opposite to the magnetic gap, and conductor coils disposed by way of another insulating layer formed between the upper magnetic pole and the lower magnetic pole.
A recording/reproducing separated type magnetic head comprising:
- a reproducing head having a reproducing element, said reproducing element being disposed by way of an insulating layer formed between a lower magnetic shield disposed on a substrate and an upper magnetic shield;
- and
- a recording head including a lower magnetic pole disposed adjacent to said reproducing head, a lower magnetic pole front end layer disposed on one end of the lower magnetic pole and formed with a protrusion on one end of the lower magnetic pole front end layer, a lower magnetic pole rear end layer disposed on the other end of the lower magnetic pole, a non-magnetic insulating layer that fills a portion between the lower magnetic pole rear end layer and the lower magnetic pole front end layer, an upper magnetic pole disposed by way of a magnetic gap layer above the lower magnetic pole front end layer, the non-magnetic insulating layer and the lower magnetic pole rear end layer, said upper magnetic pole providing a magnetic gap at one end portion including the protrusion, said upper magnetic pole being connected with the lower magnetic pole rear end layer, and conductor coils disposed by way of another insulating layer formed between the upper magnetic pole and the lower magnetic pole.
Dependencies are inferred from the claim text.