Alps Electric Co., Ltd.

Tdk Corporation

Alps Electronic Co., Ltd.

Toshinori Watanabe

Kiyoshi Sato

Masamichi Saito

Toshihiro Kuriyama

Hisayuki Yazawa

Kiyoshi Kobayashi

Toru Takahashi

Hideki Gochou

Minoru Yamada

Sumihito Morita

Naruaki Oki

Fumihito Koike

Akira Takahashi

Yoshihiko Kakihara

Hiroko Shinozaki

Akihiro Makino

Eiji Umetsu

Takashi Hatanai

Yoshihiro Kanada

Nobuhiro Hayashi

Masaki Ikegami

Hiroshi Kameda

Mitsuo Kawasaki

Ichiro Noguchi

Akira Koyama

Yusuke Toma

Hiromi Ikegami, Legal Representative

Chiaki Ikegami, Legal Representative

Hiromi Ikegami

By Chiaki Ikegami, Legal Represenative

Atsushi Sato

To provide a perpendicular magnetic recording head which can prevent unintentional recording and erasing from occurring on recording media. In a perpendicular magnetic recording head comprising a pair of side shield layers made of a soft magnetic material on both sides in a track width direction of a magnetic pole part of a main magnetic pole layer, the pair of side shield layers have a front end face exposed at a medium-opposing surface and a side end face extending from one end part of the front end face remote from the magnetic pole part in the track width direction to the deeper side in a height direction, while the front end face and the side end face form an angle of 90&#xb0; or greater therebetween.

Perpendicular magnetic recording head

A perpendicular magnetic recording head includes a first magnetic layer having a main magnetic pole exposed at a medium-facing surface that faces a recording medium; a second magnetic layer that faces the first magnetic layer with a nonmagnetic layer interposed therebetween; and a coil layer for applying a recording magnetic field to the first magnetic layer. The second magnetic layer includes a relatively thick edge portion, whereby the edge-write magnetic field is reduced and the external magnetic field resistance is increased.

Perpendicular magnetic recording head and perpendicular magnetic recording/reproducing head having a magnetic shield layer with a thick edge portion

There is provided a perpendicular magnetic recording head device which can increase magnetic field gradient to exhibit excellent recording performance while maintaining magnetic field intensity capable of performing information recording well. In a perpendicular magnetic recording head device composed of a main magnetic pole layer and a return path layer which are laminated with a nonmagnetic insulating layer therebetween, the return path layer has a two-layer structure composed of a low saturation magnetic flux density layer (low Bs layer), and a high saturation magnetic flux density layer (high Bs layer) formed an the low Bs layer and made of a material that has a relatively high saturation magnetic flux density. In a front end surface of the return path layer, the low Bs layer and the high Bs layer are exposed.

Perpendicular magnetic recording head device capable of increasing magnetic field gradient to exhibit excellent recording performance while maintaining magnetic field intensity

A magnetic recording head and a method of manufacturing the magnetic recording head are provided. The perpendicular magnetic recording head includes a main magnetic pole layer and a return path layer that face each other with a gap therebetween in a lamination direction. A non-magnetic insulating layer is interposed between the main magnetic pole layer and the return path layer. At least one stepped portion is formed on a facing surface of at least one of the main magnetic pole layer and the return path layer.

Perpendicular magnetic recording head having a stepped portion and method of manufacturing the same

A main magnetic pore layer is formed on an insulating layer flattened into a high-flatness surface, and a yoke layer having a large film thickness is formed under the main magnetic pole layer independently of the main magnetic pole. The main magnetic pole layer has a front end surface formed in a shape with a width size gradually increasing in a direction of track width as the front end surface departs farther away from an auxiliary magnetic pole layer. A perpendicular magnetic recording head can be provided which can suppress the occurrence of fringing in a recording pattern, and can form the main magnetic pole layer with high pattern accuracy, and can satisfactorily introduce a recording magnetic field to a fore end of the main magnetic pole layer.

Method of manufacturing a perpendicular magnetic recording head

A thin-film magnetic head includes a magnetic pole, a magnetic circuit unit separate from the magnetic pole, and a coil layer. The magnetic pole has a predetermined shape in which the width of the bottom surface of an upper magnetic pole layer is larger than the width of the top surface of a lower magnetic pole layer. The core layer is disposed at the back in the height direction of the magnetic pole.

Thin-film magnetic head, magnetic device including the same, and method for manufacturing the same

A main magnetic pole layer is formed on an insulating layer flattened into a high-flatness surface, and a yoke layer having a large film thickness is formed under the main magnetic pole layer independently of the main magnetic pole. The main magnetic pole layer has a front end surface formed in a shape with a width size gradually increasing in a direction of track width as the front end surface departs farther away from an auxiliary magnetic pole layer. A perpendicular magnetic recording head can be provided which can suppress the occurrence of fringing in a recording pattern, and can form the main magnetic pole layer with high pattern accuracy, and can satisfactorily introduce a recording magnetic field to a fore end of the main magnetic pole layer.

A thin film magnetic head has coil layer formed in a space surrounded by a lower core layer, a protruding layer and a back gap layer. The top of these layers are planarized to a continuous flat surface. A lower magnetic pole layer, a gap layer, an upper magnetic pole layer and an upper core layer are formed on the flat surface and are precisely formed in a predetermined shape. The track width Tw can also be set to a predetermined dimension by the width of the upper magnetic pole layer at a surface facing the recording medium. Also, the magnetic path can be shortened to improve magnetic properties.

Method of manufacturing a thin film magnetic head

A thin-film magnetic head includes a lower core layer; a recording core formed on the lower core layer and exposed at a face surface facing a recording medium, the recording core including a gap layer, an upper pole layer, and optionally, a lower pole layer; an upper core layer magnetically coupled to the upper pole layer; and a coil. A tip surface of the upper core layer at the face surface is set back from the face surface in the height direction, and the tip surface is an inclined surface or a curved surface in which the depth gradually increases from the track width direction. A method for fabricating a thin-film magnetic head is also disclosed.

Thin-film magnetic head appropriately suppressing side fringing and method for fabricating the same

A thin film magnetic head wherein a partial insulating layer is formed on a bottom pole layer with a gap layer provided therebetween, the gap depth Gd being regulated by the distance from a surface facing a recording medium to the partial insulating layer. A magnetic flux partially leaks from a tip region of an upper core layer to the bottom pole layer through the partial insulating layer to effectively suppress magnetic saturation of the tip region, thereby improving the NLTS characteristic and PW50 characteristic, and suppressing the occurrence of side fringing.

Method of manufacturing thin film magnetic head having partial insulating layer formed on bottom pole layer through gap layer

Thin film magnetic head having partial insulating layer formed on bottom pole layer through gap layer and method of manufacturing the same

Thin film magnetic head and method of manufacturing the same

A main magnetic pole layer is formed on an insulating layer flattened into a high-flatness surface, and a yoke layer having a large film thickness is formed on the main magnetic pole layer independently of the main magnetic pole. The main magnetic pole layer has a front end surface formed in a shape with a width size gradually increasing in a direction of track width as the front end surface departs farther away from an auxiliary magnetic pole layer. A perpendicular magnetic recording head can be provided which can suppress the occurrence of fringing in a recording pattern, and can form the main magnetic pole layer with high pattern accuracy, and can satisfactorily introduce a recording magnetic field to a fore end of the main magnetic pole layer.

Perpendicular magnetic recording head having main magnetic pole layer formed on high-flatness surface, and method of manufacturing the head

A thin film magnetic head wherein a partial insulating layer is formed on a bottom pole layer with a gap layer provided therebetween, the gap depth Gd being regulated by the distance from a surface facing a recording medium to the partial insulating layer. A magnetic flux partially leaks from a tip region of an upper core layer to the bottom pole layer through the partial insulating layer to effectively suppress magnetic saturation of the tip region, thereby improving the NLTS characteristic and PWcharacteristic, and suppressing the occurrence of side fringing.

Growing community of inventors

Niigata-ken, Japan

Toshinori Watanabe