Floating magnetic head including a durable sealing glass compoun

Details Floating magnetic head including a durable sealing glass compoun Floating magnetic head including a durable sealing glass compoun

1990-07-24

1993-01-05

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360122, 360126, G11B 560, G11B 1564, G11B 1732, G11B 2120

Patent

active

051776537

ABSTRACT:
A compound floating magnetic head is provided for writing and reading of data to and from a magnetic medium. The head includes a ferrite core, a non-magnetic slider, the ferrite core being disposed in a core slit disposed in the slider and coupled to the slider by sealing glass. In one embodiment, the magnetic head is characterized in that the sealing glass comprises 60 to 80% PbO by weight, 6.5 to 25% SiO.sub.2 by weight, 1 to 10% B.sub.2 O.sub.3 by weight and a 1 to 10% Bi.sub.2 O.sub.3 by weight as main ingredients, wherein SiO.sub.2 +B.sub.2 O.sub.3 is >10% by weight and SiO.sub.2 /B.sub.2 O.sub.3 is >2. With the head of the present invention, deterioration of the electromagnetic conversion characteristics by sealing glass is prevented and the head has very high reliability.

REFERENCES:
patent: 3520831 (1970-07-01), Trap
patent: 4741849 (1988-05-01), Naito et al.
patent: 5008767 (1991-04-01), Iwata et al.

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