Dynamic magnetic information storage or retrieval – Head – Gap spacer
Patent
1983-10-06
1987-01-13
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Head
Gap spacer
360120, 360125, 360126, 360122, G11B 523, G11B 5235, G11B 5147, G11B 5187
Patent
active
046368973
ABSTRACT:
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.
REFERENCES:
patent: 4036723 (1977-07-01), Schwartz et al.
patent: 4219854 (1980-08-01), Church et al.
patent: 4287544 (1981-09-01), Lazzari
patent: 4295173 (1981-10-01), Romankiw et al.
patent: 4423451 (1983-12-01), Chi
patent: 4458280 (1984-07-01), Cunningham
patent: 4546398 (1985-10-01), Toda et al.
patent: 4550353 (1985-10-01), Hirai et al.
IBM Technical Disclosure Bulletin, vol. 23, No. 5, Oct. 1980, pp. 2148-2149, "Design . . . Recording Heads" by Romankiw et al.
Fujiwara Hideo
Iijima Akemi
Nakamura Hitoshi
Shiiki Kasuo
Shinagawa Kiminari
Garcia Alfonso
Heinz A. J.
Hitachi , Ltd.
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