Dynamic magnetic information storage or retrieval – Head – Gap spacer
Patent
1983-06-03
1987-03-17
Hecker, Stuart N.
Dynamic magnetic information storage or retrieval
Head
Gap spacer
360122, 360123, 360126, G11B 523, G11B 5187, G11B 517, G11B 5147
Patent
active
046512489
ABSTRACT:
A thin-film magnetic head which has a structure wherein a spiral conductor coil having a plurality of turns is disposed between first and second magnetic layers being substantially in parallel with each other, through upper and lower inorganic insulator layers, and in which a part of the outermost turn of the conductor coil is exposed on a face opposite a magnetic recording medium along with the upper and lower inorganic insulator layers, to form a magnetic gap. This head can be readily manufactured by a manufacturing method including the step of forming the outermost turn of the conductor coil on the side of the face opposite the magnetic recording medium so as to be wider than any other part of the conductor coil, and the step of thereafter machining the face opposite the magnetic recording medium so as to expose the outermost turn of the conductor coil on the face opposite the magnetic recording medium. The magnetic head of the present invention is suited to high-density recording, and is high in recording and reproducing efficiencies and also in reliability.
REFERENCES:
patent: 4246620 (1981-01-01), Kaminaka et al.
patent: 4295173 (1981-10-01), Romankiw et al.
patent: 4318148 (1982-03-01), Kaminaka et al.
patent: 4539616 (1985-09-01), Yuito et al.
Romankiw et al., "Thin Film and Thin-Film/Ferrite Hybrid Magnetic Heads," IBM Tech. Disc. Bull., vol. 18, No. 1, Jun. 1975.
Kanai et al., "High Track Density Thin-Film Tape Heads," IEEE Transactions on Magnetics, vol. MAG-15, No. 3, Jul. 1979.
Fujiwara Hideo
Shiiki Kazuo
Shinagawa Kiminari
Shiroishi Yoshihiro
Yuito Isamu
Hecker Stuart N.
Hitachi , Ltd.
Urcia Benjamin E.
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