Thin-film magnetic head having thin coil-layer and method for manufacturing the thin-film magnetic head
AssigneeAlps Electric Co., Ltd.
InventorsKiyoshi Kobayashi, Hideki Gochou, Hisayuki Yazawa, Toru Takahashi
Life of this patent
Estimating the term…
Abstract
A thin-film magnetic head includes a first coil layer disposed at a lower core layer side of the interface between an upper core layer and an upper magnetic-pole layer, which are joined to each other, and a second coil layer disposed at the upper core layer side of the interface between the upper core layer and the upper magnetic-pole layer. The thickness of a coil conductor of the first coil layer is set smaller than the thickness of a coil conductor of the second coil layer.
Claims13
A thin-film magnetic head comprising:
- a lower core layer;
- an upper core layer opposing the lower core layer;
- an upper magnetic-pole layer disposed between the upper core layer and the lower core layer and joined to the upper core layer;
- a magnetic gap layer disposed between the upper magnetic-pole layer and the lower core layer;
- a first coil layer disposed at the lower core layer side of an interface between the upper core layer and the upper magnetic-pole layer, and
- a second coil layer disposed at the upper core layer side of said interface,
- wherein the thickness of a coil conductor of the first coil layer is smaller than the thickness of a coil conductor of the second coil layer, and
- wherein the width of the coil conductor of the second coil layer is smaller than the width of the coil conductor of the first coil layer.
A thin-film magnetic head comprising:
- a lower core layer;
- an upper core layer opposing the lower core layer;
- an upper magnetic-pole layer disposed between the upper core layer and the lower core layer and joined to the upper core layer;
- a magnetic gap layer disposed between the upper magnetic-pole layer and the lower core layer;
- a first coil layer disposed at the lower core layer side of an interface between the upper core layer and the upper magnetic-pole layer;
- and
- a second coil layer disposed at the upper core layer side of said interface,
- wherein the thickness of a coil conductor of the first coil layer is smaller than the thickness of a coil conductor of the second coil layer, and
- wherein the distance between each winding of the coil conductor of the second coil layer is smaller than the distance between each winding of the coil conductor of the first coil layer.
A thin-film magnetic head comprising:
- a lower core layer;
- an upper core layer opposing the lower core layer;
- an upper magnetic-pole layer disposed between the upper core layer and the lower core layer and joined to the upper core layer;
- a magnetic gap layer disposed between the upper magnetic-pole layer and the lower core layer;
- a first coil layer disposed at the lower core layer side of an interface between the upper core layer and the upper magnetic-pole layer;
- and
- a second coil layer disposed at the upper core layer side of said interface,
- wherein the thickness of a coil conductor of the first coil layer is smaller than the thickness of a coil conductor of the second coil layer, and
- wherein a second organic insulation-layer is applied to the first coil layer between each winding of the coil conductor thereof, a second inorganic insulation-layer covers the overall surface of the second organic insulation-layer, a surface of the second inorganic insulation-layer being formed planar, and the second coil layer is formed on the planar surface of the second inorganic insulation-layer.
Dependencies are inferred from the claim text.