Dynamic magnetic information storage or retrieval – Head – Core
Patent
1986-10-14
1988-12-27
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Head
Core
360125, G11B 5235
Patent
active
047944838
ABSTRACT:
A magnetic head has a layer of amorphous magnetic alloy arranged to define a magnetic gap therebetween, the layer being bonded with a bonding glass having a viscosity of 10.sup.5 poises or less at a temperature by at least 50.degree. C. lower than the crystallization temperature of the amorphous magnetic alloy, a good water resistance after sintering and a low coefficient of thermal expansion such as 100.times.10.sup.-7 /.degree.C. or less. The bonding glass contains 55 to 70% by weight of V.sub.2 O.sub.5, 17 to 25% by weight of P.sub.2 O.sub.5, 3 to 20% by weight of Sb.sub.2 O.sub.3, 0 to 20% by weight of PbO, 0 to 15% by weight of Tl.sub.2 O, and 0 to 5% by weight of Nb.sub.2 O.sub.5.
REFERENCES:
patent: 3520831 (1970-07-01), Hendrikus
patent: 4060422 (1977-11-01), Asahara
patent: 4229220 (1980-10-01), Hirota
patent: 4342943 (1982-08-01), Weaver
Morikawa Juichi
Naitoh Takashi
Namekawa Takashi
Ogihara Satoru
Yamada Seiichi
Heinz A. J.
Hitachi , Ltd.
Sniezek Andrew L.
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