Hitachi, Ltd.

Hitachi Metals, Ltd.

Hitachi Maxell, Limited

Research Development Corporation of Japan

Hitachi Global Storage Technologies Japan, Ltd.

Hitachi Global Storage Technologies

Hitachi Research Dev. Corp.

Kazuo Shiiki

Hisashi Takano

Isamu Yuito

Eijin Moriwaki

Naoki Koyama

Hideo Tanabe

Toshio Kobayashi

Masahiro Kitada

Masaaki Futamoto

Fumio Kugiya

Hirotsugu Fukuoka

Noriyuki Kumasaka

Yoshibumi Matsuda

Mikio Suzuki

Shigekazu Otomo

Kyo Akagi

Takeshi Nakao

Ryoichi Nakatani

Noboru Shimizu

Yoshinori Miyamura

Yoshihiro Hamakawa

Takayuki Munemoto

Tokuho Takagaki

Hideo Todokoro

Tohru Ishitani

Yoshihiro Shiroishi

Tsuyoshi Ohnishi

Chiaki Ishikawa

Mitsuhiro Kudo

Noritoshi Saito

Hideo Fujiwara

Takeo Yamashita

Kiminari Shinagawa

Hitoshi Nakamura

Yasutaro Uesaka

Isamu Yuitoo

Hiroyuki Suzuki

Norio Ohta

Yukio Honda

Yoshio Homma

Kazuetsu Yoshida

Toshiaki Tsuyoshi

Shinji Narishige

Takeshi Kimura

Kanji Kawakami

Toshio Niihara

Yoshinobu Tarutani

Shinji Takayama

Sadao Hishiyama

Norikazu Tsumita

Yasunobu Ogata

Norifumi Miyamoto

Masanori Tanabe

Atsushi Saiki

Osamu Kitakami

Harunobu Saito

Saburo Suzuki

Seiichi Asada

Mitsuo Abe

Shinobu Sasaki

Yasuo Tsukuda

Yoshizo Sawada

Kouichi Shimizu

Eiji Nakanishi

Mitsuo Suda

Keiko Shiokawa

Hitoshi Numasaka

Shigeo Aoki

The magnetoresistance effect element is of a multilayered structure having at least magnetic layers and an intermediate layer of an insulating material, a semiconductor or an antiferromagnetic material against the magnetic layers, and the magnetoresistance effect element has terminals formed at least on the opposite magnetic layers, respectively, so that a current flows in the intermediate layer. The film surfaces of all the magnetic layers constituting the magnetoresistance effect element are opposed substantially at right angles to the recording surface of a magnetic recording medium. Therefore, the area of the magnetic layers facing the recording surface of the magnetic recording medium can be extremely reduced, and thus the magnetic field from a very narrow region of the high-density recorded magnetic recording medium can be detected by the current which has a tunneling characteristic and passes through the intermediate layer.

Method for manufacturing magnetic head device

Magnetic apparatus with perpendicular recording medium and head having multilayered reproducing element using tunneling effect

In a composite magnetic head comprising a magnetoresistive read head including a magnetic thin film having a magnetoresistive effect and soft magnetic members interposing the soft magnetic film between them through a non-magnetic insulation layer, an induction type write head including poles formed in a moving direction of a medium and a conductor crossing the poles, and disposed in the proximity of the magnetoresistive head, and a substrate supporting these heads, the present invention discloses a composite magnetic head characterized in that part of a floating surface inclusive of the magnetic head constituent members has recesses and the read/write operations to and from the medium are effected by the portion interposed by these recesses.

Combination perpendicular magnetic head having shield material formed at both ends of an upper pole of a write element

The magnetoresistance effect element is of a multilayered structure having at least magnetic layers and an intermediate layer of an insulating material, a semiconductor or an antiferromagnetic material against the magnetic layers, and the magnetoresistance effect element has terminals formed at least on the opposite magnetic layers, respectively, so that a all the magnetic layers constituting the magnetoresistance effect element are opposed substantially at right angles to the recording surface of a magnetic recording medium. Therefore, the area of the magnetic layers facing the recording surface of the magnetic recording medium can be extremely reduced, and thus the magnetic field from a very narrow region of the high-density recorded magnetic recording medium can be detected by the current which has a tunneling characteristic and passes through the intermediate layer.

Magnetic head with conductors formed on endlayers of a multilayer film having magnetic layer coercive force difference

Magnetic head having track width defined by trench portions filled with magnetic shield material

In a composite magnetic head comprising a magnetoresistive read head including a magnetic thin film having a magnetoresistive effect and soft magnetic members interposing the soft magnetic film between them through a non-magnetic insulation layer, an induction type write head-including poles formed in a moving direction of a medium and a conductor crossing the poles, and disposed in the proximity of the magnetoresistive head, and a substrate supporting these heads, the present invention discloses a composite magnetic head characterized in that part of a floating surface inclusive of the magnetic head constituent members has recesses and the read/write operations to and from the medium are effected by the portion interposed by these recesses.

Method of fabricating a magnetic head by focused ion beam etching

Magnetic disk apparatus including magnetic head having multilayered reproducing element using tunneling effect

Narrow track thin film head including magnetic poles machined by focused ion beam etching

The magnetoresistance effect element is of a multilayered structure having at least magnetic layers and an intermediate layer of an insulating material, a semicondutor or an antiferromagnetic material against the magnetic layers, and the magneto-resistance effect element has terminals formed at least on the opposite magnetic layers, respectively, so that a current flows in the intermediate layer. The film surfaces of all the magnetic layers constituting the magnetoresistance effect element are opposed substantially at right angles to the recording surface of a magnetic recording medium. Therefore, the area of the magnetic layers facing the recording surface of the magnetic recording medium can be extremely reduced, and thus the magnetic field from a very narrow region of the high-density recorded magnetic recording medium can be detected by the current which has a tunneling characteristic and passes through the intermediate layer.

Magnetoresistance effect elements and magnetic heads using the tunneling magnetoresistive effect

Narrow track thin film head having a focused ion beam etched air bearing surface

Narrow track thin film magnetic head suitable for high density recording

The magnetoresistance effect element is of a multilayered structure having at least magnetic layers and an intermediate layer of an insulating material, a semiconductor or an antiferromagnetic material against the magnetic layers, and the magnetoresistance effect element has terminals formed at least on the opposite magnetic layers, respectively, so that a current flows in the intermediate layer. The film surfaces of all the magnetic layers constituting the magnetoresistance effect element are opposed substantially at right angles to the recording surface of a magnetic recording medium. Therefore, the area of the magnetic layers facing the recording surface of the magnetic recording medium can be extremely reduced, and thus the magnetic field from a very narrow region of the high-denisity recorded magnetic recording medium can be detected by the current which has a tunneling characteristic and passes through the intermediate layer.

Magnetoresistance effect multilayer film with ferromagnetic film

In a composite magnetic head comprising a magnetoresistive read head including a magnetic thin film having a magnetoresistive effect and soft magnetic members interposing the soft magnetic film between them through a non-magnetic insulation layer, an induction type write head including poles formed in a moving direction of a medium and a conductor crossing the poles, and disposed in the proximity of the magnetoresistive head, and a substrate supporting these heads, part of a floating surface inclusive of the magnetic head constituent members has recesses and the read/write operations to and from the medium are effected by the portion interposed by these recesses.

Multilayer magnetoresistance effect-type magnetic head

In an inductive-write, magnetoresistive-read type magnetic head having a magnetoresistive read head and an inductive write head superimposed on each other, the magnetic center of the read head is made more coincident with the physical center of the write head by a changing of a magnetization direction of a magnetoresistive element. The recording/reproducing apparatus using this magnetic head can thus have a good S/N ratio even if the track width is narrow.

Magnetic head and recording and reproducing apparatus having an

Growing community of inventors

Kanagawa-ken, Japan

Kazuo Shiiki