Fujitsu Corporation

Teruo Kiyomiya

Yuji Uehara

Minoru Hasegawa

Ikuya Tagawa

Hiroshi Maeda

Yoshinori Ohtsuka

Yukinori Ikegawa

Masahiro Kakehi

Syuji Nishida

Tomoko Kutsuzawa

Takashi Sekikawa

A thin film magnetic head includes an upper and a lower magnetic pole layer extending forward from a central magnetic core within a thin film coil. A narrow upper and lower front magnetic pole piece are connected to the front ends of the upper and lower magnetic pole layer, respectively. The upper front magnetic pole piece extends rearward from its front end exposed at a medium-opposed surface. The lower front magnetic pole piece extends in a lateral direction along the medium-opposed surface by a lateral width larger than that of the upper front magnetic pole piece. The lower front magnetic pole piece extends rearward from the medium-opposed surface by a longitudinal length smaller than that of the upper front magnetic pole piece. The lower front magnetic pole piece serves to concentrate the magnetic flux at the front ends of the upper and lower front magnetic pole pieces. Since the lower front magnetic pole piece is designed to have a larger lateral width in the lateral direction irrespective of a smaller length in the longitudinal direction, the production of the lower front magnetic pole piece can remarkably be facilitated.

Thin film magnetic head with short lower magnetic pole piece

There is disclosed a method for preparing a magnetic head having a high-speed magnetic recording ability. A resist insulating layer is formed on a coil, a magnetic pole layer is formed on the resist insulating layer and a laminate including the resist insulating layer and the magnetic pole layer is heated so that the resist insulating layer is allowed to shrink.

Method for preparing magnetic head

Growing community of inventors

Kawasaki, Japan

Teruo Kiyomiya