Perpendicular recording head with leading bump in the main pole having narrow leading gap (LG)
AssigneeHGST Netherlands B.V.
InventorsKimitoshi Etoh, Mikito Sugiyama, Hisashi Kimura, Kazuhiko Hosomi
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Abstract
In one embodiment, a perpendicular magnetic recording head includes a main magnetic pole; a leading shield below a leading side of the main magnetic pole; a leading gap between the leading shield and the main magnetic pole; a trailing shield above a trailing side of the main magnetic pole; a trailing gap between the trailing shield and the main magnetic pole; and a nonmagnetic leading bump between the main magnetic pole and the leading shield. Additional embodiments are also disclosed.
Claims21
A perpendicular magnetic recording head, comprising:
- a main magnetic pole;
- a leading shield below a leading side of the main magnetic pole;
- a leading gap between the leading shield and the main magnetic pole;
- a trailing shield above a trailing side of the main magnetic pole;
- a trailing gap between the trailing shield and the main magnetic pole;
- and
- a nonmagnetic leading bump between the main magnetic pole and the leading shield,
- wherein the leading bump is a separate layer from the leading gap,
- wherein the leading bump extends to a media facing surface,
- wherein the leading bump has a first portion, a thickness of the first portion increasing therealong in a direction away from the media facing surface.
A perpendicular magnetic recording head,
- comprising:
- a main magnetic pole;
- a leading shield below a leading side of the main magnetic pole;
- a nonmagnetic leading gap between the leading shield and the main magnetic pole;
- a trailing shield above a trailing side of the main magnetic pole;
- a nonmagnetic trailing gap between the trailing shield and the main magnetic pole;
- and
- a nonmagnetic leading bump between the main magnetic pole and the leading shield,
- wherein a portion of the leading side of the main magnetic pole tapers towards the trailing side of the main magnetic pole therealong towards a media facing surface thereof;
- wherein the leading bump has a first portion extending along the portion of the leading side, a thickness of the first portion increasing therealong in a direction away from the media facing surface;
- wherein the leading bump has a triangular cross sectional shape along a plane dissecting the main magnetic pole in an in-track direction.
A perpendicular magnetic recording head,
- comprising:
- a main magnetic pole;
- a leading shield below a leading side of the main magnetic pole;
- a nonmagnetic leading gap between the leading shield and the main magnetic pole;
- a trailing shield above a trailing side of the main magnetic pole;
- a nonmagnetic trailing gap between the trailing shield and the main magnetic pole;
- and
- a nonmagnetic leading bump between the main magnetic pole and the leading shield,
- wherein portions of the leading and trailing sides of the main magnetic pole taper towards one another therealong in a direction towards a media facing surface,
- wherein the leading bump extends along the tapered portion of the leading side of the main magnetic pole,
- wherein the leading bump has a first portion, a thickness of the first portion increasing therealong in a direction away from the media facing surface,
- wherein the leading bump has a second portion extending from the first portion in a direction away from the media facing surface, a thickness of the second portion decreasing therealong in a direction away from the media facing surface,
- wherein the leading bump has a triangular cross sectional shape along a plane dissecting the main magnetic pole in an in-track direction.
Dependencies are inferred from the claim text.