Read-Rite Smi Corporation

Hirohiko Kamimura

Kenji Komaki

Fuminori Hikami

Masaki Ueno

Hideyasu Nagai

Naoto Matono

Ryuichiro Yoshizaki

Marcos M Lederman

Satoru Hoshi

Masahiko Ando

A spin-valve magnetic transducing element. In one embodiment, a spin-valve magnetic transducing element is disclosed in which a ferromagnetic tunneling junction film, including first and second ferromagnetic layers and an insulating layer is enclosed between the ferromagnetic layers. A nonmagnetic metal thin film is inserted between the second ferromagnetic layer and the insulating layer, all of which are formed on a substrate.

Spin-valve magnetic transducing element and magnetic head having free layer with negative magnetostriction

A compound thin film magnetic head in which the upper shield of the readout MR head also serves as the lower magnetic film of the write inductive head. The upper shield has a layered structure including a shield part of soft magnetic material functioning as a shield to magnetically shield the MR head, a lower pole part and transition part of soft magnetic material functioning as a write magnetic pole opposing the upper pole of the inductive head, and a nonmagnetic separation layer to magnetically separate these. Between the lower pole part and the transition part, an additional nonmagnetic separation layer can be provided. The shield part can be configured from multiple magnetic films formed in layers and enclosing a nonmagnetic separation layer.

Magnetic head shield pole with nonmagnetic separation film between transition portion and shield portion

A composite type thin-film magnetic head. In one embodiment, a substrate is used as a base, and an insulating film, a lower shielding magnetic film, a magneto-resistive element, an upper shielding magnetic film, a magnetic gap film, a recording inductive magnetic film and a protective layer are laminated on this base. An inductive head used for recording is formed by the upper shielding magnetic film. A magnetic gap film, a recording inductive magnetic film, and a magneto-resistive head used for playback are formed by the magneto-resistive element. The upper shielding magnetic film and recording inductive magnetic film are formed by an electroplating of permalloy. The upper shielding magnetic film has a lower nickel concentration on the side of the magnetic gap film than on the side of the magneto-resistive element.

Composite type thin-film magnetic head with improved recording

Growing community of inventors

Mishima-gun, Japan

Hirohiko Kamimura