Tdk Corporation

Eiichi Omata

Tetsuro Sasaki

Masashi Sano

Daisuke Miyauchi

Soji Koide

Hiraku Hirabayashi

Satoru Araki

Takeo Kagami

Hiroshi Kiyono

Takamitsu Sakamoto

Nobuya Oyama

Hajime Amano

Yasufumi Uno

Seiji Yari

Nubuya Oyama

Yasuyuki Yamamoto

A composite thin-film magnetic head includes a substrate, an under layer formed on the substrate, an MR read head element formed on the under layer and provided with a lower shield layer, an upper shield layer and an MR layer in which a sense current flows in a direction perpendicular to a surface of the MR layer through the upper shield layer and the lower shield layer, an inter-shield insulation layer laminated on the MR read head element, an inductive write head element formed on the inter-shield insulation layer and provided with a first magnetic pole layer, a nonmagnetic layer, a second magnetic pole layer whose end portion is opposed to an end portion of the first magnetic pole layer through the nonmagnetic layer, and a write coil, and an additional shield layer formed between the upper shield layer and the first magnetic pole layer.

Composite thin-film magnetic head, magnetic head assembly and magnetic disk drive apparatus

A thin-film magnetic head comprises at least one of an electromagnetic transducer and a magnetoresistive device, and a heater member adapted to generate heat upon energization. The heater member contains NiCu or NiCr.

Thin-film magnetic head, head gimbal assembly, and hard disk drive incorporating a heater

A thin-film magnetic head comprises at least one of a magnetoresistive device and an electromagnetic transducer, and a heater adapted to generate heat upon energization. A method of making this thin-film magnetic head comprises a heater forming step of forming the heater, and an annealing step of annealing the heater formed by the heater forming step.

Method of making thin film magnetic head

A MR transducer with a spin-valve structure formed on a substrate. The spin-valve structure has at least an antiferromagnetic material layer made of a NiMn alloy, a first ferromagnetic material layer, a nonmagnetic material layer and a second ferromagnetic material layer sequentially deposited on the substrate in this order.

Magnetoresistive transducer with spin-valve structure and manufacturing

In a magnetoresistance effect element, a pinning layer (antiferromagnetic layer) has a composition of Ru--Mn or Ru--M--Mn where M represents at least one selected from Rh, Pt, Pd, Au, Ag, and Re, and impurity concentrations of the pinning layer are regulated. Accordingly, there can be provided the magnetoresistance effect element having a magnetic multilayered film which is excellent in corrosion resistance, thermal stability and magnetic field sensitivity and has a large MR change ratio, as well as a magnetoresistance device, such as a magnetoresistance effect type head or the like, using such a magnetoresistance effect element.

Magnetoresistance effect element and magnetoresistance device

The present invention is directed to a magnetic transducer element with outstanding productivity, with which the track width can be defined to a high degree of accuracy and required magnetic characteristics can be reliably imposed upon the central active area. Laminated films which generate a magnetoresistance effect, a magnetic domain control film, which applies a magnetic bias to the laminated films and a pair of lead conductor films are provided. The laminated films and the magnetic domain control film are laminated to each other to constitute a central active area. The lead conductor films terminate the side end surfaces of the central active area at the two sides in direction running at a right angle to direction of the lamination of the central active area.

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Tokyo, Japan

Eiichi Omata