Magnetic head and method for preparing the same

Details Magnetic head and method for preparing the same Magnetic head and method for preparing the same

1978-09-18

1979-10-02

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Core

29603, G11B 5251, G11B 542

Patent

active

041700325

ABSTRACT:
A magnetic head having a sputter-deposited glass film of the gap forming area of the magnetic core, said glass film being made of borosilicate glass having the composition consisting of 65-85 mol % of SiO.sub.2, 8-30 mol % of B.sub.2 O.sub.3 and containing 2-15 mol % of alkali metal oxide Na.sub.2 O and K.sub.2 O and 0.1-5 mol % of Al.sub.2 O.sub.3, with the molar ratio of boron oxide to alkali metal oxides being defined by the following formula: ##EQU1## The magnetic head provides sharpness of the recording leakage flux, thus giving excellent electromagnetic conversion characteristics.

REFERENCES:
patent: 3024318 (1962-03-01), Duinker et al.
patent: 3458926 (1969-08-01), Maissel et al.
patent: 3639701 (1972-02-01), Secrist et al.
patent: 3842494 (1974-10-01), Chiba et al.

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