Patent ID: 6525905
Filing Date: 2003-02-25
Classification: G11B

Abstract:
A thin-film magnetic head, comprising:a first insulating layer as a write gap layer; a non-magnetic body provided adjacent to a surface of the first insulating layer in an area close to an air-bearing surface that faces a recording medium and having a wedge-shaped cross section that is taken along a surface perpendicular to both a surface along which the first insulating layer extends and the air-bearing surface, the wedge-shaped cross section directing its tip to the air-bearing surface; a bottom magnetic layer and a top magnetic layer facing each other on a side close to the air-bearing surface, sandwiching the first insulating layer therebetween and magnetically coupled to each other on a side far from the air-bearing surface, the bottom magnetic layer including: a bottom pole provided so as to be exposed to the air-bearing surface and to face the first insulating layer; a bottom pole tip portion provided in an area between the bottom pole and the first insulating layer on the side close to the air-bearing surface, the bottom pole tip portion being exposed to the air-bearing surface and adjacent to both the bottom pole and the first insulating layer; and a bottom magnetic connection portion provided adjacent to the bottom pole in the area between the bottom pole and the first insulating layer on the side far from the air-bearing surface, and the top magnetic layer including: a top pole provided so as to be recessed from the air-bearing surface and to face the first insulating layer; a top pole tip portion provided in an area between the top pole and the first insulating layer on the side close to the air-bearing surface, the top pole tip portion being exposed to the air-bearing surface and adjacent to both the top pole and the first insulating layer, the top pole tip portion facing the bottom pole tip portion sandwiching the first insulating layer therebetween and extending over the non-magnetic body; and a top magnetic connection portion provided so as to magnetically couple the top pole to the bottom magnetic connection portion; a first thin-film coil buried with a second insulating layer in an area enclosed by the first insulating layer and the bottom magnetic layer; and a second thin-film coil buried with a third insulating layer in an area enclosed by the first insulating layer, the non-magnetic body and the top magnetic layer, wherein the top pole tip portion and the third insulating layer constitute a flat plane and the top pole is provided on the flat plane and a concave portion is provided close to the second insulating layer in the bottom pole tip portion and a part of the second insulating layer is buried in the concave portion adjacent to the first insulating layer.