Hitachi, Ltd.

Akemi Iijima

Hitoshi Nakamura

Yoshihiro Shiroishi

Hideo Fujiwara

Isamu Yuito

Kiminari Shinagawa

Kasuo Shiiki

A perpendicular magnetic recording and reproducing thin film head of a structure excellent in magnetic characteristics and easy of fabrication, wherein a lower magnetic layer disposed on a flat nonmagnetic substrate is used as a main magnetic pole, a first insulator layer is formed on the main magnetic pole, a conductor for a coil and a second insulator layer are disposed on the first insulator layer, and an upper magnetic layer which lies in contact with the lower magnetic layer through the first insulator layer at one end thereof and directly at the other end thereof and which overlies the second insulator layer in a part thereof other than both the ends is disposed and used as an auxiliary magnetic pole.

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Kitatsuru, Japan

Akemi Iijima