Dynamic magnetic information storage or retrieval – Head – Core
Patent
1987-12-03
1989-12-12
Hecker, Stuart N.
Dynamic magnetic information storage or retrieval
Head
Core
360126, G11B 5235
Patent
active
048871770
ABSTRACT:
Magnetic head, comprising a magnetic core provided by two core limbs (1, 3) formed a ferrite, two cladding layers (11) of a magnetic material provided on the core limbs and having a higher saturation magnetization than the ferrite, a non-magnetic gap (9) present between the cladding layers, and a winding aperture (5) accommodating an electric coil (7). The gap is composed of two insulation layers (13) of an electrically insulating material provided on the cladding layers and having a greater mechanical hardness than the other layers of the gap, two first layers (15) of a first metallic material provided on the inslation layers and two second layers (17) of a second metallic material provided on the first layers and being bonded to each other.
REFERENCES:
patent: 3412455 (1968-11-01), Bronnes et al.
patent: 3672045 (1972-06-01), Robertson
patent: 4764832 (1988-08-01), Eaz et al.
IEEE Transaction on Magnetics, vol. Mag. 18, No. 6, Nov., 1982 "Metal-in-Gap Head", by F. J. Jeffers.
Journalof Magnetism materials 54-57 (1986) 1567-1570 "Recording Characteristics of High Metal Powder Floppy Disc", by H. Fujiwara.
Botjer William L.
Hecker Stuart N.
Severin David J.
U.S.Philips Corp.
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